renr2630-01-01-all

RENR2630-01May 2002

Systems Operation784C, 785C, 789C, 793C, 793CXQ, 797 and 797B Off-HighwayTruck/Tractors Vital InformationManagement System (VIMS)JSM1-Up (Machine)CBR1-Up (Machine)2BW303-Up (Machine)5YW1-Up (Machine)APX1-Up (Machine)ATY1-Up (Machine)2PZ102-Up (Machine)5AZ264-Up (Machine)

i01658146

Important Safety InformationMost accidents that involve product operation, maintenance and repair are caused by failure toobserve basic safety rules or precautions. An accident can often be avoided by recognizing potentiallyhazardous situations before an accident occurs. A person must be alert to potential hazards. Thisperson should also have the necessary training, skills and tools to perform these functions properly.

Improper operation, lubrication, maintenance or repair of this product can be dangerous andcould result in injury or death.

Do not operate or perform any lubrication, maintenance or repair on this product, until you haveread and understood the operation, lubrication, maintenance and repair information.

Safety precautions and warnings are provided in this manual and on the product. If these hazardwarnings are not heeded, bodily injury or death could occur to you or to other persons.

The hazards are identified by the “Safety Alert Symbol” and followed by a “Signal Word” such as“DANGER”, “WARNING” or “CAUTION”. The Safety Alert “WARNING” label is shown below.

The meaning of this safety alert symbol is as follows:

Attention! Become Alert! Your Safety is Involved.

The message that appears under the warning explains the hazard and can be either written orpictorially presented.

Operations that may cause product damage are identified by “NOTICE” labels on the product and inthis publication.

Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. Thewarnings in this publication and on the product are, therefore, not all inclusive. If a tool, procedure,work method or operating technique that is not specifically recommended by Caterpillar is used,you must satisfy yourself that it is safe for you and for others. You should also ensure that theproduct will not be damaged or be made unsafe by the operation, lubrication, maintenance orrepair procedures that you choose.

The information, specifications, and illustrations in this publication are on the basis of information thatwas available at the time that the publication was written. The specifications, torques, pressures,measurements, adjustments, illustrations, and other items can change at any time. These changes canaffect the service that is given to the product. Obtain the complete and most current information beforeyou start any job. Caterpillar dealers have the most current information available.

When replacement parts are required for thisproduct Caterpillar recommends using Caterpil-lar replacement parts or parts with equivalentspecifications including, but not limited to, phys-ical dimensions, type, strength and material.

Failure to heed this warning can lead to prema-ture failures, product damage, personal injury ordeath.

3Table of Contents

Table of Contents

Systems Operation Section

General Information ................................................ 4Normal Operation ................................................... 9Global Positioning System .................................... 10Service Operations ............................................... 10Data Logger - Reset ............................................. 11Data Logger - Start/Stop ....................................... 12Display Backlighting - Set ..................................... 12Display Contrast - Set ........................................... 12Display Language - Set ........................................ 13Display Units - Set ................................................ 13Event - Configure .................................................. 13Event Acknowledged - Show ................................ 15Event List - Show .................................................. 15Event Statistics - Show ......................................... 16Lubrication Interval - Set ....................................... 16Lubrication Manual - Start .................................... 17Machine Location - Show ..................................... 17Machine Status - Show ......................................... 17Odometer - Set ..................................................... 18Resettable Totals - Reset ...................................... 19Road Analysis Control Sensitivity - Set ................ 19Resettable Totals - Show ...................................... 20Service Lamp - Reset ........................................... 21Service Lamp - Set ............................................... 21Snapshot Trigger - Configure ................................ 24System Self Test ................................................... 26Truck Payload - Calibrate ...................................... 27Truck Payload - Configure ..................................... 28VIMS Snapshot - Start .......................................... 29Warning Operation ................................................ 30Truck Payload System (TPS) GeneralInformation .......................................................... 32

Component Descriptions ...................................... 34VIMS Electronic Control Module ........................... 34Display Modules .................................................... 38Quad Gauge Module ............................................ 39Speedometer/Tachometer Module ........................ 39Message Center Module ....................................... 40Keypad .................................................................. 46OK Key .................................................................. 46Gauge Key ............................................................ 47Arrow Keys ............................................................ 47ID Key ................................................................... 48Function Keys ....................................................... 48Numeric Keys ........................................................ 49Switches ............................................................... 49Sensors ................................................................. 51Data Connectors ................................................... 54Action Lamp .......................................................... 55Action Alarm ......................................................... 55Payload Lamps ..................................................... 56Service Lamp ........................................................ 56Related Components ............................................ 57Parameters ........................................................... 58Glossary of Terms ................................................. 99

Index Section

Index ................................................................... 110

4Systems Operation Section

Systems Operation Section

i01709744

General InformationSMCS Code: 7601

g00879982Illustration 1

Typical block diagram of the Vital InformationManagement System (VIMS)



VIMS display components.

(1) Gauge cluster module(2) Speedometer/tachometer module(3) Message center module(4) Alert indicator(5) Data logging indicator(6) Gauges(7) Tachometer(8) Ground speed readout(9) Actual gear indicator(10) Message area(11) Universal gauge(12) Gauge warning area


VIMS keypad module

(13) “Gauge” Key(14) Key pressed indicator(15) Backward arrow key(16) Forward arrow key

The Vital Information Management System (VIMS) isa state-of-the-art onboard system with the followingfeatures:

• Machine systems are monitored for the operator.

• Payload productivity information is measured bythe system and stored in onboard memory. Thisinformation can be downloaded later for analysis.

• Abnormal machine conditions and/or incorrectoperation of the machine are identified. Thediagnosis of these abnormal conditions willallow the operator to modify the operation ofthe machine in order to correct the problem.The service technician is able to schedulemaintenance for the machine if the condition isnot related to the operation of the machine.

• Prognostic information that can help predictpotential problems before failures can occur. Thisallows the maintenance of the machine to bescheduled during the preventive maintenanceservicing interval.

The components of the typical VIMS are listedbelow:

• VIMS electronic control module

• VIMS keypad module

• Display components

• Switches

• Sensors

• Solenoids

• Payload lamps

• Warning lamps

• Warning alarm

• Global Positioning System (GPS)

Data Links

The VIMS communicates with other electroniccontrols on the machine and the VIMScommunicates with systems off the machine throughthe data links. The five VIMS data links are listedbelow:

CAT Data Link – This two wire data link allowscommunication between the VIMS electronic controlmodule and other machine control systems.

Serial Peripheral Interface (SPI) Data Link – Thisfour wire data link allows communication betweenthe VIMS electronic control module and all of thedisplay components except the keypad.

Keypad Data Link – This two wire data link allowscommunication between the VIMS electronic controlmodule and the keypad.

RS-232 Data Link (Service Tool) – This serial threewire data link allows communication between theVIMS electronic control module and the service tool(laptop computer).


RS-232 Data Link (Broadcast) – This serialthree-wire data link allows communication betweenthe VIMS electronic control module and other offboard systems (non service tool). Onboard datacan be passed from the machine hands free if auser supplied system such as radio telemetry isconnected to this port.

Data

The Vital Information Management System uses fourtypes of data. The four types of data are listed here:

Sensed – Data is read from the sensors andthe switches. The sensors and the switchescommunicate with the VIMS electronic controlmodule.

Internal – The data is generated within the VIMSelectronic control module. The date and time areexamples of internal data.

Communicated – The data is received through theCAT data link from other machine systems. Forexample, the engine speed is received through theCAT data link from the electronic engine control.

Calculated – Data mathematically determined bythe VIMS electronic control module. For example,the event duration is calculated and stored in theevent list.

Events

Table 1

EVENTS

Data Event Maintenance Event

Filters Open Sensor Circuits, etc.

Temperature Calibration

Possible Machine Damage

Performance (Payload)

Location (GPS)

The operator is alerted to the existence of allabnormal machine conditions by VIMS. All abnormalmachine conditions are called data events. A highengine coolant temperature is an example of adata event. The operator is alerted to problemsin the VIMS electronic control module and otherelectronic modules on the machine. The diagnostictype of electronic system failures are calledmaintenance events. The signal voltage of thecoolant temperature sensor that is above normal isan example of a maintenance event. Stored VIMSevent (data and maintenance) information is used toassist service personnel with machine maintenanceand troubleshooting.

DATA events are related to a machine system.The operator needs to RESPOND to this event inmost cases. For example, the operator needs tomodify operation in order to cool the converteroil temperature when the temperature is too high.When such an event is present, pressing the “F1”key will show more information. The operator isshown additional information on the second line ofthe message center. During temperature warnings,the “F1” key will cause the display to show theactual temperature of the machine system.

Problems with the electrical system of the machineare called MAINTENANCE events. MAINTENANCEevents require a service technician to MAKE AREPAIR. When a diagnostic code is present,pressing the “F1” key will display the MID, the CIDand the FMI. When a MID for a different systemis displayed in place of a MID for VIMS, refer tothe applicable Service Manual for that electroniccontrol.

Note: Multiple events for a single machine conditionmay occur. The Vital Information ManagementSystem can determine if the actual cause of astored event is due to a faulty component or a trueabnormal condition.

Feature Variations

The same VIMS operates on a variety of differentmachines. All the possible VIMS functions arenot performed on every machine. Configurationsoftware is used in order to identify the type of VIMSmachine. The configuration software also identifiesthe available VIMS functions.

The quantity of VIMS display components and thetype of available indications are listed here:

• Quad gauge modules (1) are used toshow changing machine conditions.Speedometer/tachometer modules (2) are used toshow changing machine conditions. Tachometergauge (7) shows engine speed (RPM) information.Gauges (6) display information such as thetemperature, the pressure and the level.

• One two-digit gear readout (9) perspeedometer/tachometer module showsthe actual transmission gear and the directioninformation.

• One three-digit speed readout (8) perspeedometer/tachometer module shows theground speed information (“[MPH (km/h)]”).

• One alert indicator (4) per message centermodule shows that an event has been detectedand the event is present.


• One data logging indicator (5) per messagecenter module shows that the data logger isactive and the data logger was activated fromthe keypad.

• One universal gauge (11) per message centermodule (3). The value of the parameter that isdisplayed on message area (10) will be indicatedby the universal gauge.

• One message area (10) per message centermodule. The parameter name, status and operatorinstructions are information that is displayed onthe message area.

The type of indications and the quantity ofindications that are used in the VIMS displayarea will vary according to the application. All theindications that are used in the VIMS display areamay not be used on every machine. A machine mayuse one or two of the message center modules. Inaddition to the indications that are listed above,the action lamp and the action alarm indicate theseverity (warning category) of a problem. Theservice indicator lamp alerts the service technicianof an event that has occurred. The service indicatorlamp indicates that the event is present.

Diagnostic information is stored for all maintenanceevents even if the event is not present at the time oftroubleshooting. A lap top personal computer (PC)is used as the VIMS service tool. Refer to the VitalInformation Management System VIMSpc UsersManual, FEB0047 for additional information.

Stored Data

The occurrence of certain VIMS events and realtime machine conditions are recorded in onboardVIMS memory. The information is organized intoseven categories. This information is used toanalyze problems with the machine. The informationis typically used at a later date by servicetechnicians or management. The seven categoriesof information are listed here:

Event List/Summary List – The event list is a recordof stored events that have occurred on the machine.Not all events are stored. The record contains thelast 500 events (data or maintenance) that are listedin chronological order. This means that the eventsare listed in the order of occurrence. The newestevents appear at the top of the list. The event listtransfers the oldest data into the “event summarylist” when the event list exceeds 500 records. The“event summary list” is composed of the first fiveoccurrences, the last five occurrences and theworst five occurrences that are recorded for anyof the “data events”. The “event summary list” islimited to storing only 500 records. “Maintenanceevents” can be identified by the diagnostic codes(MID, CID and FMI).

All other events are “data events”. The event listis accessible from the message center or with theservice tool.

Note: All events that contain diagnostic information(MID, CID and FMI) are the diagnostic typeof maintenance events. Not all events withoutdiagnostic information (MID, CID and FMI) are dataevents. An example of a maintenance event withoutdiagnostic codes is an open wire in the hydraulic oillevel circuit. Remember that the circuit of a switch(2-wire) (open switch) can report a true conditionthat relates to a parameter. This same switch(2-wire) can indicate a system failure (open wire)but the failure is reported as low hydraulic oil level.

Snapshot – The Snapshot stores a segment ofhistory in real time for all parameters (channels) ata one second interval. The snapshot relates to aset of predefined events. A snapshot is triggeredautomatically for a severe event. The snapshot isthen stored in memory. The configuration softwaredesignates the events that are considered to besevere events. The keypad can be used to initiate asnapshot manually. A snapshot consists of a “flightrecording” of all the parameters that describe thesystem conditions. The snapshot records data fromfive minutes before the event to one minute afterthe event. This strategy is applied to snapshots thatare triggered immediately after key ON. However,a portion of the five minutes of data that occurredprior to the event that triggered this snapshot wasactually captured prior to turning the key start switchOFF. This data may have been stored hours or daysbefore the event that triggered the snapshot.

The VIMS has the capability of storing two setsof snapshot information. If a snapshot is in theprocess of being recorded and a second snapshotis triggered the second snapshot is ignored.

The snapshot is accessible only with the servicetool.

Data Logger – The data logger captures all theparameters (channels) that are monitored by theVIMS. The data logger is recorded in real time atone second intervals. The operation of the datalogger is similar to the snapshot. However, the datalogger can not be triggered automatically. Themanual triggering of the data logger can only bedone by the service tool or the keypad. The loggercan be started and stopped with a total recordingtime of 30 minutes.

The information that is recorded by the data loggeris accessible only with the service tool. The datalogger can be reset by the service tool or thekeypad.

Note: Truck payload cycle data (time and date)can be used as basic information of data logger inplace of this data logger.


Trends – Trend information consists of theminimums, maximums and averages of parameterdata over time. Trend information is viewed withVIMSpc software. The trend information is displayedas a graph or the trend information is tabulated ascolumns of data. An example of trend informationis the average brake temperature per hour. Trendinformation is recorded for predefined parametersfor each machine. Trend information is recordedunder the specified guidelines that are listed here:

• All one hour continuous trends begin when thekey start switch is turned to the ON position.

• Trend data that is collected during a period lessthan one hour when the key start switch is turnedto the OFF position is discarded.

• Trend points are the average of each trend thatwas captured during the past hour. Each trendmust meet the conditions that are set for thattrend. . A single trend point for the designatedhour is calculated and stored when the measuredtrends are averaged over one hour.

The trend data point or the responsible failure modeidentifier are stored according to the guidelines thatare listed here:

1. At least one “Trend condition” was met.

2. “FMI 19 conditions not met” is stored or theactual FMI that was responsible for the conditionsthat were not met for the entire hour is stored.

Trends are accessible only with the service tool.

Cumulative – Cumulative information is the numberof occurrences (counts) of specific events. Anexample of cumulative information is total enginerevolutions or total fuel consumption over the life ofthe machine or component. Cumulative informationis recorded for a standard set of parameters. Theparameters are defined in the configuration softwarefor each machine. The onboard system collects“life-time cumulatives” with no need to reset. Thesituations that will cause an automatic resetting ofthe “cumulatives” are listed here:

• New onboard software is flashed into the onboardmemory.

Note: The term “onboard software” describes thefollowing information:system (VIMS) and the modelof the machine

• A configuration is loaded with any changes to themethods of calculating and storing cumulativedata. The change indicates that a correction hasactually been made to the configuration or theVIMS electronic control module has just beeninstalled from a different VIMS application. Thenew VIMS electronic control module may notrecognize the methods of calculating and storingcumulative data that is used by the configuration.

• The disconnect switch is in the OPEN position.

Resetting of “cumulatives” manually is not required.If the user desires, the “cumulatives” may be resetmanually. The reset process clears all “cumulatives”.Because there is only one choice, “cumulatives” cannot be reset individually. If a reset of “cumulatives”is requested, all the “cumulatives” will be reset.

“Cumulatives” are accessible only with the servicetool.

Histograms - Histogram information records thehistory of a parameter since last reset. For example,a histogram of the engine speed would indicate thepercentage of time that the engine operated withina defined speed limit (example 0-699, 700-1299,1300-1699, 1700-2199, 2200 up) and the timeinterval (example 25 to 475 SMH or 1/1/99 to 2/2/99)of the data gathered. Histograms can be used toevaluate the range of operation for a parameter.

Histograms are accessible only with the service tool.

Payload - Payload information is recorded for theoff-highway trucks, as required.

Total payload data is accessible only with theservice tool. Basic data is available throughthe message center by accessing resettable“cumulatives”.

Related Support Material

Service Manual Module, RENR2631, “Testingand Adjusting/Troubleshooting; Vital InformationManagement System (VIMS)”

VIMSpc Users Procedure Manual, FEBJ0047

Note: An electronic copy of the VIMSpc UsersProcedure Manual, FEBJ0047 is included on theVIMSpc CD-ROM.


i01710073

Normal OperationSMCS Code: 7601


Gauge Cluster Module

(1) Gauge warning area(2) Pictograph symbol


Speedometer/Tachometer Module

(3) Tachometer(4) Pictograph symbol(5) Ground speed readout(6) Actual gear readout for the transmission


Message Center Module

(9) Alert indicator(10) Data logging indicator(11) Message area(12) Universal gauge(13) Gauge warning area

During normal operation, the VIMS displaycomponents provide the operator and the servicetechnician with the information that is listed here:

• The display components indicate whetherthe Vital Information Management System isoperating properly. Whenever the key start switchis turned to the ON position, some of the VIMSoutputs (gauges and message center module)briefly operate. This is a system self-test of thedisplay components. See the Systems Operation,“System Self Test” topic for the complete test ofthe VIMS outputs.

• The measured value of present system conditionsare shown on the display components. Themachine systems are continuously monitored. Thenormal range value of the gauges in the quadgauge module are shown in the central region.

• The display components will indicate whether anabnormal machine system condition (data event)exists. The machine systems are continuouslymonitored. When an abnormal condition (problem)exists, alert indicator (9) FLASHES. Messagearea (11) shows the system parameter withthe abnormal condition and the value of theparameter. Universal gauge (12) also shows therelative value of the abnormal parameter. Theservice indicator lamp is turned ON and the eventmay be stored in the memory of the VIMS ECM. Aproblem that is more severe requires the actionlamp to FLASH and the action alarm is requiredto SOUND. See the Systems Operation, “WarningOperation” section.


• The display components will indicate when a VIMSfailure (maintenance event) exists. Continuouschecks are made for the existence of electricalfailures in the VIMS electronic control module andin the other electronic control modules installedon the machine. When the Vital InformationManagement System detects a diagnostic typeof maintenance event, the service indicator lampis activated. The event is shown on the messagearea. The event is also stored in the memoryof the VIMS electronic control module. See theSystems Operation, “Service Operations” section.

The Vital Information Management System entersthe normal mode when the key start switch isturned to the ON position. This is the mode of“normal” operation. The system will enter the normalmode after the installation of valid source softwareand configuration software. Refer to the SystemsOperation, “VIMS Electronic Control Module” sectionof this manual for additional information on themodes of operation.

i01710106

Global Positioning SystemSMCS Code: 7602

The VIMS 10.3 and later software allows the VIMSto receive a position stamp from an external GlobalPositioning System (GPS) through the telemetry portor the CAN data link. The position stamp from theGPS is stored in the “payload” and the “event” data.

The position stamp will contain the information thatis listed below:

• Longitude

• Latitude

• Elevation

The position stamp of the GPS is available in thesubsystems that are listed below:

Truck Payload System

The VIMS truck payload system will record theposition stamp at the start of the “load cycle” andthe end of the “load cycle”. There are two positionstamps that are associated with each payloadcycle. Refer to Systems Operation, RENR2631 foradditional information.

Events

When an event is logged, the VIMS will record theposition stamp that is provided by the GPS.

Snapshot

When a snapshot is triggered the VIMS will recordthe position stamp that is provided by the GPS. Onlyone position stamp is associated with the snapshot.

The location of the machine is available on themessage center via a service program code. Referto the Systems Operation, “Machine Location- Show” section of this manual for additionalinformation.

Hardware and SoftwareRequirements

Hardware

The machine must be equipped with an externalGlobal Positioning System. The VIMS automaticallydetects the source of the Global Positioning Systemwith the protocols that are listed below:

MMS/SLIP Protocol – The VIMS receives informationfrom the GPS via the VIMS telemetry port.

MineStar/TMAC Protocol – The VIMS receivesinformation from the GPS via the CAN data link.

TSIP Protocol – The VIMS receives information fromthe GPS via the CAN data link.

NMEA Protocol – The VIMS receives informationfrom the GPS via the VIMS telemetry port.

Software

The Information from the Global Positioning Systemis only accessible via the VIMSpc software.

i01710098

Service OperationsSMCS Code: 7601

Numerous VIMS service operations can be initiatedby the operator or a service technician. A uniqueservice program code (SPC) is assigned to eachof the service operations. The service programcodes are entered through the VIMS keypadmodule. Entering the service program code startsthe corresponding service operation. The serviceoperations are listed in Table 2.


Table 2

VIMS Service Operations

Service Operation Service ProgramCode

Service ProgramCode Number

PageNumber

Data Logger - Reset DLRES (35737) 11

Data Logger - Start/Stop DLOG (3564) 12

Display Backlighting - Set BLT (258) 12

Display Contrast - Set CON (266) 12

Display Language - Set LA (52) 13

Display Units - Set UN (86) 13

Event - Configure ESET(1) (3738) 13

Event Acknowledged - Show EACK (3225) 15

Event List - Show ELIST (35478) 15

Event Statistics - Show ESTAT (37828) 16

Lubrication Interval- Set LUBSET (582738) 16

Lubrication Manual - Start LUBMAN (582626) 17

Machine Location - Show LOC (562) 17

Machine Status - Show MSTAT (67828) 17

Odometer - Set ODO(1) (636) 18

Resettable Totals - Reset RESET (73738) 19

Road Analysis Control Sensitivity -Set

RAC(1) (722) 19

Resettable Totals - Show TOT (868) 20

Service Lamp - Reset SVCLIT (782548) 20

Service Lamp - Set SVCSET(1) (782738) 21

Snapshot Trigger - Configure ERSET(1) (37738) 24

System Self Test TEST (8378) 26

Truck Payload - Calibrate PAYCAL(1) (729225) 27

Truck Payload - Configure PAYCONF(1) (7292663) 28

VIMS Snapshot - Start EREC (3732) 29

(1) The service tool is required to be connected and communicating with the machine before this Service Program Code will function.

Each service program code is a unique number ofone to ten digits that abbreviates this operation.The service program codes have a letter equivalentthat describes the service operation. This letterequivalent makes remembering the service programcode for each operation easier. The Englishletter equivalent for each service program codeis shown in the parentheses. The same serviceprogram codes are used regardless of the onboardlanguage.

After you enter the service program code on thekeypad, the request will begin after you press the“OK” key. You must activate this command withinfive seconds of entering the last character of theService Program Code. The maximum delay thatis allowed between the entry of the characters ofthe Service Program Code is five seconds.

i01711574

Data Logger - ResetSMCS Code: 7601

The following information describes the serviceprogram code: 35737 (DLRES)


This service program code resets the availablestorage time of the data logger to 30 minutes.Use the keypad to enter the service code 35737(DLRES) and press the “OK” key in order to resetthe data logger. Resetting the data logger erasesany presently stored information. The message areawill show:


Note: The Data Logger is the only onboard filethat can be reset through the keypad. The VIMSpcsoftware is not needed to reset the data logger.

i01263344

Data Logger - Start/StopSMCS Code: 7601

The following information describes the serviceprogram code: 3564 (DLOG)

This service program code starts and stops the datalogging function (storage of data) until 30 minutesof information has been stored. (If the data loggerdata is being downloaded from the machine, thedata logger can not be started.) The data loggercan be started and stopped any number of timesover any period of time (minutes, hours or days)until the “data logging” time totals 30 minutes andeight seconds. The dots of the data logger indicatorare in the upper right hand corner of the universalgauge. The dots of the data logger indicator willstop scrolling when the data logger is no longerrecording data. The dots of the data logger do notscroll when the service tool starts the data logger.The remaining storage time of the data logger isshown on the message area for five seconds afterentering this SPC on the keypad. The format of thetime is shown in “minutes:seconds”. An exampleis shown here:


The information that is shown in illustration 8 isdisplayed in the message area. The message areawill display the remaining storage time prior tostarting the data logger. When data logging is inoperation a series of dots scroll in the upper righthand corner of the universal gauge.

Note: The dots in the upper right corner of theuniversal gauge scroll only if data logging is startedfrom the keypad.

i01263200

Display Backlighting - SetSMCS Code: 7601

The following information describes the serviceprogram code: 258 (BLT)

This service program code allows the backlightintensity of the message area to be changed. Afterthe service program code is entered, the actionsthat are listed here will occur in the following order:

• The intensity will automatically decrease from theoriginal setting to 0%.

• The setting will automatically jump from 0% to100%. The intensity will then decrease to theoriginal value.

• Pressing the arrow keys will manually scrollthrough the intensity settings.

As the message area scrolls in intensity, thecorresponding percentage of backlight intensity isdisplayed in the message area. The arrow keys areused in the scrolling procedure in order to select anew backlight intensity setting. Press the “OK” keyin order to accept the new setting.


i01263190

Display Contrast - SetSMCS Code: 7601

The following information describes the ServiceProgram Code: 266 (CON)


This service program code allows the contrast of themessage center to be changed. After the serviceprogram code is entered, the actions that are listedhere will occur in the following order:

• The contrast will automatically decrease from theoriginal setting to 0%.

• The setting will automatically jump from 0% to100%. The contrast will then decrease to theoriginal value.

• Pressing the arrow keys will manually scrollthrough the intensity settings.

As the message area scrolls in contrast, thecorresponding percentage of contrast is displayedin the message area. The arrow keys are used inthe scrolling procedure in order to select a newcontrast setting. Press the“OK” key in order toaccept the new selection.

Message center contrast adjustment requires the133-1840 or later VIMS Message Center Module.


i01263223

Display Language - SetSMCS Code: 7601

The following information describes the serviceprogram code: 52 (LA)

This service program code toggles the informationthat is shown on the message area. The informationis toggled between the two available languages.Information is shown in the selected language untilthe other language is selected. This setting maybe performed when the key start switch is in theOFF position.

The primary language for a given VIMS configurationis the language that will be active after a newonboard software has been flashed into onboardmemory. English will always be one of the twoavailable onboard languages.

i01263216

Display Units - SetSMCS Code: 7601

The following information describes the serviceprogram code: 86 (UN)

The service program code toggles the data that isshown on the display. The data is toggled betweenthe “English” or “Metric” units of measurement.Data is shown in the selected unit until the otherunit is selected. The new setting will remain untilthe setting is changed by repeating this procedure.The setting will not be changed when the key startswitch is in the OFF position.

i01711606

Event - ConfigureSMCS Code: 7601

The following information describes the serviceprogram code: 3738 (ESET)

The “event - configure” command allows theservice technician to modify a configuration with theCaterpillar Information System Builder in order toturn off the functions that are listed here:

• Event Storage

• Event Display

• Service Indicator Lamp

• Broadcast (Telemetry systems)

Note: The “Event - Configure” command is notavailable for all events. The parameter must bedesignated as “user configured” in the configurationsoftware.

Security

1. The service program code only functions whilethe service tool (VIMSpc) is connected.

2. After the service tool (VIMSpc) is disconnectedfor 30 seconds, this service program code willno longer be active.

Note: This command can only be viewed whenVIMSpc is not connected.

Setup

1. Connect the service tool to the machine andestablish communications with VIMSpc.


2. The message center should be in the backgroundmode. background mode displays the followingitems on the message center: time, date, servicehours, and odometer reading. Use the keypad toenter the command “ESET” (3738). Then pressthe “OK” key. The message center will show thefollowing message:


3. The service technician can select the desired“ESET” configured event by scrolling through thelist of events. The service technician uses the“<” and “>” arrow keys on the keypad in orderto scroll.

Note: The Master Event Number is a unique numberthat is assigned to an event. The Master EventNumber is listed in the “Data Event Report” for agiven configuration. The “Master Event Number”is viewed with the Caterpillar Information SystemBuilder. This report can be generated by selectingthe “data event report” option under the “NavigateMenu” of the “Information System Builder”. Thenumbers are listed in the “MST EVNT (MasterEvent)” column of the report.


(1) Master event number(2) Event storage function(3) Event display function(4) Service indicator lamp(5) Telemetry System(6) Factory default function(7) Status of the function(8) Name of event

4. The service technician can select the desiredfunction from the following list by pressing thecorresponding “number key”. The “X” indicatesthat the function has been enabled. The “-”indicates that the function has been disabled.

The definition of the functions are listed here:

Event Storage function (2) toggles the statusof the function from an “X” to a “-” in order toindicate that the function has been disabled.

Event Display function (3) toggles the statusof the function from an “X” to a “-” in order toindicate that the function has been disabled.

Service indicator Lamp (4) toggles the statusof the function from an “X” to a “-” in order toindicate that the function has been disabled.

Telemetry (Broadcast) function (5) toggles thestatus of the function from an “X” to a “-” inorder to indicate that the Telemetry (Broadcast)function has been disabled.

Factory Default function (6) toggles the statusof the function from an “X” to a “-” in order toindicate that the Factory Default function hasbeen enabled or that the Factory Default hasbeen disabled. See the Notes.

Note: All configurable events are set to the factorydefaults that are designated in the configurationsoftware until the default is changed by performingthis procedure.

Note: The ESET command references the functionsas the function has been setup in the configuration.The ESET command can turn OFF a function ONLYwhen the function is turned ON in the configurationsoftware. The ESET command will NOT allow afunction that is disabled from the factory in theconfiguration software to be turned ON.

Procedure

a. To set the “EVENT DISPLAY” function, pressthe “2” key. The following message will bedisplayed on the message center.




b. The “> arrow” key is used to toggle the statusof the “EVENT DISPLAY” ON and OFF. Pressthe “OK” key in order to accept the change.The message center will then display thecurrent Master Event Number message. Referto illustration 14.

If the “X” is selected then the message centerwill display the event. If the “-” is selected themessage center will NOT display the event.

Use this procedure to modify the functions that arelisted here: EVENT STORAGE, SERVICE INDICATORLAMP, and TELEMETRY SYSTEM (BROADCAST).

i01263243

Event Acknowledged - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 3225 (EACK)

This service program code shows all active eventsthat have been acknowledged by the operator withthe keypad.


i01263228

Event List - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 35478 (ELIST)

This service program code shows the event list inan abbreviated form. The entries of the event listare displayed: “last event in - first event out”. The“first event out” represents the INACTIVE time ofthe event. Some events may appear out of orderbased on the start times of the events. Use the“BACKWARD” and “FORWARD” arrow keys to scrollthrough the list. The message “END OF LIST” isshown when the oldest event in the list is reached.

• This list contains only inactive EVENTS. Aninactive event has a defined “start time and endtime”. Active events will not appear in this list.

• While the “ELIST” is displayed, any new event thatbecomes inactive will be added to the beginningof the “ELIST”. The new entry to the “ELIST” maybe viewed by pressing the backward arrow keyin order to move to the beginning of the new“ELIST”.

Data Events

The following information is shown in the VIMSmessage area for each data event in the event list:

• The name of the parameter

• The status of the parameter (LO or HI etc.)

• Service meter reading at the start of the event.

• The event duration

• The warning category

An example of a machine event with “sensorinformation” is shown here:


An example of a data event with “switch information”is shown here:



245.2 is the service meter reading at the start ofthe event. 000:04:13 is the duration of the event inHHH:MM:SS format. The 2 that follows the “eventduration” represents the warning category 2.

Press the “F1” key while you view a machine event.This function will replace the information that isshown on the second line of the message area. Thenew information that is shown contains informationabout the maximum values that were measured forthe parameter such as “2266 RPM” or “LO (switch)”.Pressing the “OK” key puts the message centerback into the previous mode. See the SystemsOperation, “Keypad” topic for additional information.Pressing the “OK” key puts the message centerback into the original mode.

Maintenance/Diagnostic Events

The following information is shown in the VIMSmessage area for each system event in the eventlist.

• The name of the parameter

• The status of the parameter (ERR, etc.)

• Service meter reading at the start of the event.

• The event duration

• The event category

An example of a maintenance type of service eventwith “sensor information”:


245.2 is the service meter reading at the start ofthe event. 000:04:13 is the duration of the event inHHH:MM:SS format. The “2” is the warning category.

When you view a diagnostic event, press the “F1”key in order to replace the information that is shownon the second line of the message area. Theinformation in the message area is replaced withthe “MID-CID-FMI”. The message center can bereturned to the original mode by pressing the “OK”key. The FORWARD and BACKWARD arrow keysare used to scroll through the event list.

See the Systems Operation, “Keypad” topic foradditional information.

i01263254

Event Statistics - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 37828 (ESTAT)

This service program code shows the number ofmaintenance events and data events since thememory of the VIMS electronic control module waslast cleared of all events (event list). An example isshown below:


i01712983

Lubrication Interval - SetSMCS Code: 7601

The following information describes the serviceprogram code: 582738 (LUBSET)

This service program code is used to set the timebetween each lubrication and the duration of eachlubrication. The duration of lubrication for individualmachines are listed here.

• The duration of lubrication is adjustable from 30 to120 seconds. The factory default is 75 seconds.

When this code is entered the display will first show:


Use the arrow keys to adjust the time of thelubrication intraval. This is the time in minutesbetween the automatic lubrication interval.

• The time interval is adjustable from 5 to 120minutes. The factory default setting is 60 minutes.

After the proper time is set press the “OK” key.


Use the arrow keys to adjust the lubrication durationtime. After the proper time is set press the “OK”key. The message center will now show:


Press the “OK” key again to exit LUBSET.

The elapsed time (minutes) between each of thelubrication intervals is counted only when theground speed is greater than 2.0 mph. Idle timeunder the shovel will not be counted against thenext lubrication interval.

Lubrication will continue for the programmedduration, once the lubrication has begun.

i01263550

Lubrication Manual - StartSMCS Code: 7601

The following information describes the serviceprogram code: 582626 (LUBMAN)

This service program code is used to manually startlubrication. This operation overrides the OFF timeset under the service program code of LubricationCycle Time (LUBSET). The duration of lubricationis the length of time that was programmed during“Autolube Cycle Time”.

The following message will be shown:


i01711697

Machine Location - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 562 (LOC)

This service program code allows the servicetechnician to view the location of the machine. Thelocation of the machine is determined by an externalGlobal Positioning System (if equipped). The VIMSreceives the location of the machine via the “VIMStelemetry” port or the “CAN” data link. When theservice technician enters the service program code562 (LOC) the message area of the VIMS messagecenter will display the following information.


Note: If the VIMS is not receiving information froma Global Positioning System, the display will show“NO RESPONSE”.

The location that is shown in the message area isupdated when the VIMS receives new data from theGlobal Positioning System. Press the “OK” key inorder to exit this function. An active event overridesthe location that is shown in the message area.

i01711843

Machine Status - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 67828 (MSTAT)

Note: All screens are English only.

This service program code is used to view varioussections of the machine status. The message areawill show:

• The version of the onboard software (source andconfiguration)

• The version of the source software that is installedfor development by the factory

Note: The “production change level” of the sourceand configuration software are always zero. Thechange level of the configuration software ischanged when the configuration is revised by “Viewand change configuration file” option in VIMSpc.



Pressing the “>” key will allow other aspects of themachine status to be displayed in the followingorder. The machine staus and correspondingmessage area display are shown here:

• CAT part number and the Hardware Version


• Model Number

This message will display the model number of themachine.


• Serial Number (Product Identification Number)


• Equipment Number (Customer Assigned)


• Attachment Code

• Choice of Language


• Configuration Type


• “Operator ID”

The “Operator ID” will be used with all storedonboard information. The “Operator ID” may be upto 7 characters (numbers and letters) in length.


i01711858

Odometer - SetSMCS Code: 7601

The following information describes the serviceprogram code: 636 (ODO)


This service program code allows the servicetechnician to alter the reading of the machineodometer. The following list describes aspects ofthis service program code:

Security

1. This service program code will only function ifthe service tool (VIMSpc) is connected.

2. If the service tool (VIMSpc) becomesdisconnected for 30 seconds or longer, thiscommand will no longer be allowed to changethe setting of the odometer .

The following message is shown on the messagearea after ODO (636) and “OK” are entered fromthe keypad.


The desired setting of the machine’s odometer canbe entered from the keypad.


Press the “OK” key in order to accept the setting.

The following list contains the functions of the Inputkeys:

OK – This command accepts the setting of themachine’s odometer.

F2 – This command cancels the operation withoutchanging the present setting.

Left Arrow – This command deletes the lastcharacter or characters that were entered.

i01263523

Resettable Totals - ResetSMCS Code: 7601

The following information describes the serviceprogram code: 73738 (RESET)

This service program code is applicable to allresettable totals.

Enter the following service code: 73738 (“RESET”).Press the “OK” key in order to clear all the totals.Press the “OK” key again in order to return themessage area to the previous mode. The RESETservice program code is active only while theservice program code TOT is being viewed.

i01747459

Road Analysis ControlSensitivity - SetSMCS Code: 7601

The following information describes the serviceprogram code: 722 (RAC)

This service program code allows the servicetechnician to change the trigger values of the RAC“Event Category Groups”.

Security

1. This service program code only functions whilethe service tool (VIMSpc) is connected.


The user is allowed to change the trigger values.This is done in order to compensate for a varietyof underfoot conditions. Adjusting the triggervalues also allows the user to manage the numberof events that are created. The three “CategoryGroups” of RAC Events are listed below:

“Group - One” – “Group - One” is the most sensitivesetting. The “Group - One” setting will generatethe most events. Customers with good haul roadmaintenance will be able to use the default settingof “Group - One” immediately. Other sites withless haul road maintenance will need to start with“Group-Two” or “Group-Three” settings. Then, as thehaul road conditions improve you may reduce thetrigger levels. The primary purpose of this processis to manage (reduce) the number of RAC events.

Note: Caterpillar recommends “Group - One”settingsfor all applications.

“Group - Two” – The “Group -Two” trigger valuesare 1.35 times the settings for “Group - One”.

“Group-Three” – “Group-Three” trigger values are1.7 times the settings of “Group-One”.


In order to change the “RAC Group Settings”,connect VIMSpc to the machine. This allowsprogramming of the “RAC Group Settings” via theVIMS keypad. After communications have beenestablished, press the “tab” key on the service tooluntil the “Status” screen is shown. Enter the lettersRAC via the VIMS keypad. Then press the “OK” key.Verify the machine data (such as the serial numberand SMH). The event Category that is presentlyprogrammed will appear on the VIMS messagecenter. Enter the desired “Group” setting via theVIMS keypad in order to change the Category.

• Enter “1” for “Group - One”. Then press the “OK”key.

• Enter “2” for “Group - Two”. Then press the “OK”key.

• Enter “3” for “Group - Three”. Then press the“OK” key.

After this procedure is complete, turn the key startswitch to the OFF position and then turn the keystart switch back to the ON position. The new Groupis now active.

The RAC System provides the ability to increase thetrigger settings above the recommended factorydefault of “Group - One”. But, “Group - Two” and“Group -Three” should only be used on an interimbasis. The intent if to work toward the “Group-One”settings. As haul road conditions improve throughthe use of the RAC System, the trigger categoriesthat are used should be progressively reduced until“Group - One” is achieved.

i01711873

Resettable Totals - ShowSMCS Code: 7601

The following information describes the serviceprogram code: 868 (TOT)

This service program code 868 (TOT) allows theoperator to view information. The service programcode allows the operator to reset the total payloadactivity information since the last reset.

Procedure

1. Enter the service program code 868. Press the“OK” key. The message area will show:


Note: NNNNN represents the number of loads thatwere hauled since the previous reset.

2. Press the right arrow key. The message areawill show:


Note: NNNNN is the total weight of all loads thatwere hauled since the previous reset.



Note: NNNNN.N is the total miles (“kilometers”) thatwere travelled since the previous reset.



Note: NNN.N represents the “total travel time” thathas accumulated since the last reset. Travel timeaccumulates when the truck has been travelling ata speed that is greater than 5 km/h (3 mph).


5. Press the left arrow key in order to scroll backthrough the previous screens or press the “OK”key in order to return the message area to theprevious mode without clearing the totals.

i01263524

Service Lamp - ResetSMCS Code: 7601

The following information describes the serviceprogram code: 782548 (SVCLIT)

This service program code turns OFF theservice lamp for most active events (“data ormaintenance”) that are presently shown on thedisplay area (“remember not all active events canbe acknowledged”). All active events must be firstturned OFF with the keypad (“acknowledged”).Enter the “EACK” command in order to show allthe “acknowledged events”. Use the arrow keysin order to scroll through the event list. A “#” signis located at the right of the display beside thewarning category. The “#” sign indicates that theservice lamp is illuminated for the displayed event.


The letter “N” represents the category of event.

Use the keypad to enter “SVCLIT”. Press the “OK”key in order to turn off the lamp. The “#” sign willdisappear. The service lamp will turn OFF only afterthis procedure has been completed for ALL activeevents.


The service lamp will stay OFF under the followingconditions:

• The key start switch is turned to the OFF positionand then back to the ON position.

• “Events associated with the reset procedure thatwere still active at the time the key start switchwas turned OFF and the events are still activewhen the key start switch is turned back ON.”

• There are no additional active events since theSVCLIT reset procedure.

i01711878

Service Lamp - SetSMCS Code: 7601

The following information describes the serviceprogram code: 782738 (SVCSET)

This service program code allows the servicetechnician to choose the display mode that controlsthe service indicator lamp. The service lamp settingcan be selected for the entire system. This includescompletely turning OFF the service indicator lamp.

Security



The service technician may choose from any of thefive display modes of the service indicator lamp:

1. “1-2 SNAPSHOTS FULL”: The possible actionsof the service indicator lamp for this mode arelisted below after either one or both of thesnapshots are stored:

• The service indicator lamp flashes at tenminute intervals: The lamp is on for twoseconds and the lamp is off for two seconds.The sequence repeats ten times when thememory of “snapshot No. 1” is full.

• The service indicator lamp flashes at fiveminute intervals: The lamp is on for fourseconds and the lamp is off for two seconds.The sequence repeats ten times when thememory of both snapshots are full.

• The service indicator lamp is illuminatedsteadily when any event is present.

• The service indicator lamp will flash at aninterval: The lamp is on for one second andthe lamp is off for one second. The serviceindicator lamp will flash when an event thatcould cause damage to the machine isdetected.


2. “2 SNAPSHOTS FULL”: The possible actions ofthe service indicator lamp for this mode are listedbelow only after the second snapshot is stored:

• The service indicator lamp flashes at fiveminute intervals: the lamp is on for fourseconds and the lamp is off for two seconds.This sequence is repeated ten times. Thesequence is then repeated after a five minutepause.

• The service indicator lamp is illuminatedsteadily when any event is present.

• The service indicator lamp will flash: The lampis on for one second and the lamp is off forone second. The service indicator lamp willflash when an event that could cause damageto the machine is detected.

Note: The operator does not receive a notification inthis mode if the memory for snapshot “No. 1” is full.

3. “NO SNAPSHOT NOTICE”: The possible actionsof the service indicator lamp in this mode arelisted below:

• There is no indication of the number ofsnapshots that are stored in memory.

• The service indicator lamp is illuminatedsteadily when an event is present.

• The service indicator lamp will flash at aninterval: “one second on and one second off”.The service indicator lamp will flash whenan event that could cause damage to themachine is detected.

Note: The operator does not receive a notification inthis mode if the memory for either snapshot is full.

4. “DAMAGE EVENTS ONLY”: The possible actionsof the service indicator lamp for this mode arelisted below:

• The service indicator lamp will flash at aninterval: “one second on and one second off”.The service indicator lamp will flash whenany event that could cause damage to themachine is detected.

• There is no indication regarding other events.

Note: The operator does not receive a notification inthis mode if the memory for either snapshot is full.

5. “NEVER ON”: The service indicator lamp isdisabled in this mode for all cases. The serviceindicator lamp will never illuminate.

Note: Snapshot data that is collected by theonboard system is viewed with VIMSpc.

Procedure

Note: This service program code is in a “view onlymode” when VIMSpc is not connected.

1. Connect the service tool (VIMSpc) to the RS-232connector. The message center should be in thebackground mode. The following items shouldbe displayed on the message center: time, date,and service hours. Enter the SVCSET (782738)command via the keypad. The message centerwill show:


Note: The display first shows the present setting.The default setting is displayed on the messagecenter when a new source has been loaded or anew configuration has been loaded. The previousexample reflects the default setting of “1.1-2SNAPSHOT FULL”.

2. The arrow keys are used to move through the listof available settings. The “OK” key selects thedesired setting.


Press the right arrow key in order to advance to next setting.







Note: If the right arrow key is pressed again the listremains at the last setting. Press the left arrow keyin order to move back through the settings.

3. Press the “OK” key in order to accept the settingwhen the desired “Service Lamp Setting” isdisplayed on the message center. The optionthat was selected is now the new mode forservice indicator lamp.


Note: The setting of the service indicator lamp isset to option 4. The title of option 4 is “DAMAGEEVENTS ONLY”. This setting will be used for alloperations until one of the following events occur:

• New flash software is loaded.

• The user selects a new setting with VIMSpc. Theservice tool (VIMSpc) must be connected to themachine.

Table 3 summarizes the behavior of the serviceindicator lamp in the five lamp setting modes.


Table 3

Behavior of the Service Indicator Lamp

“ChoiceNo.”

Lamp Setting Mode “Damage Event” “Active Event” “2nd SnapsotFull”

“1st SnapshotFull”

1 “1-2 Snapshot Full” Flashing ON “Flashes EveryFive Minutes ”

“Flashes Every10 Minutes”

2 “2 Snapshots Full” Flashing ON “Flashes EveryFive Minutes ”

OFF

3 “No Snapshot Notice” Flashing ON OFF OFF

4 “Damage Events Only” Flashing OFF OFF OFF

5 “Never On” OFF OFF OFF OFF

i01585346

Snapshot Trigger - ConfigureSMCS Code: 7601

The following information describes the serviceprogram code: 37738 (ERSET)

The service program code allows the servicetechnician to enter an event that will automaticallytrigger a snapshot. This snapshot will be in additionto the snapshots that are already programmedinto the configuration. The configured snapshotwill remain active until the snapshot is cancelledby entering a different selection. The selection canbe also cleared by reinstalling the configurationsoftware.

Security


2. After the service tool (VIMSpc) is disconnectedfor 30 seconds, the service program code will nolonger be allowed to change.

Note: This command may only be viewed when theservice tool is not connected to the machine. Nochanges will be allowed.

Procedure: Service Tool Connection

Connect VIMSpc to the machine. The messagecenter should be in the background mode. Thismeans that the following items should be displayedon the message center: time, date, service hours,and the odometer reading. Use the keypad inorder to enter the command ERSET (37738). Thenpress “OK”. If a previous trigger has been set,the message center will show the following text inorder to indicate the event that had been previouslyselected.


The message will then alternate to the “confirmation”mode.


When a trigger has not been defined, the followingmessage is shown on the message center:


These messages will alternate at three secondintervals.

Press the “OK” key in order to exit the menu withno changes. Press the “right arrow” key in order toenter the snapshot trigger select mode.

Procedure to Program


The “entry mode display” always begins with thetrigger that was entered last. The “entry mode” isblank, if no “trigger event” was originally set. Datathat was input incorrectly can be corrected in the“edit mode”. A blinking cursor indicates the “inputposition” for the data within the “entry field”.

The following display is the “starting entry screen”with no “event trigger” set:


The following display is the “starting entry screen”with a previously set “event trigger”:


The “Master Event trigger number” is entered fromthe keypad in the “entry” mode. Use the left arrowkey in order to erase incorrect entries and press the“OK” key in order to set the trigger.

Note: The Master Event Number ID is a uniquenumber that is assigned to each event. TheMaster Event Number is listed in the “Data EventReport” for a given configuration. The Master EventNumber is viewed with the “View and Change theconfiguration File” option of VIMSpc. This reportcan be generated by selecting the “View/Changeconfiguration” option under the “Configure Menu” ofthe VIMSpc program. This will open a dialog boxthat instructs the user to select a configuration file.Once you have selected the configuration file, a“VIMS configuration” dialog box will open. Select the“Report” option from the menu bar. This will displaya drop down list box. Select “Data Event” from thislist. A “Report” dialog box will be displayed. Clickon “Mst Evnt” in the “Sort by” box. Then press the“ADD” push button. press the OK push button.The numbers are listed in the “MST EVNT (MasterEvent)” column of the report.


The left arrow key will back up the cursor in order toremove the “last digit” that was entered. The extra“5” that is shown in illustration 50 was erased withthe left arrow key.


Press the “OK” key in order to set the “trigger event”when the number is correct. The “confirmation”message is displayed when the trigger has beenset. The display will then show the name and the“status message” for the selected event. This isdone in order to confirm the choice.


The display will return to the “confirmation mode”.This allows the user to confirm the present entry ora new “trigger event” may be entered.

The “event trigger” in this example is set to “MasterEvent 25” (“ENG COOL TEMP HI”). The settingis retained in the battery backed up RAM. Thissetting will be used for all operations until one of thefollowing events occur:

• New flash software is installed.

• The user selects a new trigger event or differenttrigger event. VIMSpc must be connected to themachine before any changes can be made.

If an undefined number has been entered, anyexisting setting will be cleared and the followingmessage will be displayed for three seconds priorto returning to the “confirmation” mode.



When the “OK” key is pressed with a zero or thefield is left blank, the following message will bedisplayed for three seconds prior to returning to the“confirmation” mode.


The message in illustration 56 is shown when notrigger has been set. The message will be displayedfor any of the situations that are listed here:

• No trigger was originally set.

• The “event ID (Master Event Number)” that wasentered was zero.

• An invalid “event ID (Master Event Number)” wasentered.

• The “OK” key is pressed with a blank input line.


At this point, the trigger is not set. The servicetechnician must press the “OK” key in order toconfirm the desired setting.

Disconnecting VIMSpc

When VIMSpc is disconnected during the “eventID” entry, this service program code is terminated.

If VIMSpc is disconnected during the “confirmation”prompt, the setting is not affected. If the promptindicated “TRIGGER NOT SET”, then no trigger isset. The trigger will be set if the VIMS was verifyingthe “event ID”.

i01262933

System Self TestSMCS Code: 7601-532

The following information describes the serviceprogram code: 8378 (TEST)


VIMS Display Components

(1) Gauge cluster module(2) Speedometer/tachometer module(3) Message center module(4) Alert indicator(5) Data logging indicator(6) Gauges(7) Tachometer(8) Ground speed readout(9) Transmission actual gear readout(10) Message area(11) Universal gauge(12) Gauge warning area

This service program code causes a self test of theoutputs of VIMS. The outputs for the VIMS are listedhere: display modules, the action lamp, servicelamp, and the action alarm. This test is also initiatedwhen the key start switch is turned from the OFF tothe ON position. The length of time for a self test isapproximately six seconds.

This test will not prevent the operator fromcranking and starting the engine. However,allowing the self test to run completely isrecommended prior to cranking the engine.


Note: The only situation that can cause an internalcalibration of the gauges (6) and the tachometer(7) is a Key ON self test. The Key ON self test isinitiated by turning the key start switch from theOFF position to ON position. When the key startswitch is turned ON, the gauge indicators (6) andthe tachometer indicator (7) jump to the mid-scaleposition. The gauges will then sweep to zero. Thegauges are now ready for the system test to begin.

Note: A better description of the self test is availablefor the serviced machine. Refer to the Operationand Maintenance Manual.

The following items are indications of the systemtest.

• Alert indicator (4) FLASHES.

• Data logging indicator (5) scrolls.

• Universal gauge (11) sweeps from zero (left) tofull scale (right). The gauge sweeps back to theactual condition of the machine for the selectedparameter or the parameter that is associatedwith an “active event”.

• Gauge warning area (12) at each end of theuniversal gauge is turned ON.

• Message area (10) illuminates every dot on thereadout. When the self test is performed with thekey ON the following items are displayed: the partnumber of the source software, the part numberof the configuration software, and the version ofconfiguration hardware.

• Tachometer indicator (7) drops to zero from thepresent engine speed and the indicator sweepsto full scale. After the indicator reaches full scale,the tachometer indicator (7) returns to the presentengine speed.

• Ground speed readout (8) turns ON everysegment of the readout. The readout looks like188.

• Transmission gear readout (9) turns ON everysegment of the readout.

• The action lamp illuminates.

• The action alarm turns ON and OFF as if a“category 3 warning” is present.

• Gauge indicators (6) drop from the presentreading to near zero. The indicators then sweepto full scale. The indicators return to the valuesthat were shown prior to the test.

• “MPH” indicator and “KM/H” indicator turn ON.

• The background mode shows the time of day andthe machine hours are shown on the messagearea if there are no active events. The payloaddata is shown instead of the background displayduring the payload cycle.

• The payload lamps flash

• The service lamp will flash.

The following example is a message center displayfor a off highway truck .


• The following display is shown on the messagearea if the VIMS electronic control module ismissing the flash software:


The display includes a full category 3 warning.

Note: These messages are the result of “limitedmode operation”. Refer to the Systems Operation,“VIMS Electronic Control Module” section of thismanual.

i01712096

Truck Payload - CalibrateSMCS Code: 7494; 7601

The following information describes the need forusing the service program code: 729225 (PAYCAL)

The VIMS Truck Payload System will not operateuntil a successful payload calibration has beencompleted.

The following information describes the serviceprogram code 729225 (PAYCAL). The PAYCALservice program code uses the following procedurein order to calibrate the VIMS Truck Payload System:

1. Ensure that the truck body is empty. Carrybackweight will affect the payload measurement.


2. Operate the empty truck to a minimum groundspeed of four mph on hard level ground.

3. Move the transmission gear selector to theneutral position and allow the truck to coast toa stop. DO NOT use the service brakes or theretarder.

4. Manually calibrate the payload system byentering the service program code 729225(PAYCAL). One of the following two messageswill now show on the message area:


If the above message is shown, put the truck backinto service.


If the above message is shown, repeat theprocedure again. Begin at Step 1. Make sure thatthe ground speed is at a minimum of four mph. DONOT use the service brakes and/or the retarder.

i01712127

Truck Payload - ConfigureSMCS Code: 7494; 7601

The following information describes the serviceprogram code: 7292663 (PAYCONF)

The service program code 7292663 (PAYCONF)is used in order to configure the maximum weightfor the truck payload system and the “last passindicator”.

Procedure

1. Stop the truck and make sure that the body of thetruck is empty. Then enter 7292663 (PAYCONF)via the keypad. Press the “OK” key in order tocontinue. The message area will show the targetpayload weight.


Note: NNN is the maximum payload weight. Theweight is displayed in the selected units of measure(“English/Metric”).

2. Use the right/left arrows keys in order to set thedesired weight.

3. Press the “OK” key in order to accept the valuethat is shown on the message center. Themessage area will now show:


Note: “YES” might also show as a “NO”. To enablethe LAST PASS indication, use the left/right arrowkeys to toggle the LAST PASS indicator to “YES”.The continuous flashing of the RED payload statuslamps indicates that the truck is waiting for the “lastpass” of the loading tool. The “last pass” indicatesthat the VIMS loader payload system has estimatedthat the “next pass” is greater than 90 percent ofthe “selected target weight”.

4. If the truck is equipped with an external payloaddisplay you may configure the operation of thedisplay. The following settings are available forthe External Payload Display (Version 1.2) :

DISABLE – This is the default setting. Theexternal payload display will add the weight ofeach load to the total weight of the payload.

The following settings are available for theExternal Payload Display (Version 1.5) :

DISABLE – This is the default setting.

“COUNT UP” – Each load that is placed in thebody of the truck is added to the payload. Theweight is shown on the message center and theexternal payload display.


COUNT DOWN – Each load that is placed inthe body of the truck is subtracted from the“maximum weight” setting of the payload. Theweight is shown on the message center and theexternal payload display.

REWEIGH – The payload weight is displayedafter the truck shifts into second gear. The weightremains displayed on the external payloaddisplay until the load has been dumped. Theexternal payload display will be blank after theoperator dumps the load.

5. Press the “OK” key in order to accept theselection. This returns the message center to theprevious mode.

i01712149

VIMS Snapshot - StartSMCS Code: 7601

The following information describes the serviceprogram code: 3732 (EREC)

This service program code manually latches asnapshot that stores all parameter values for theprevious five minutes and the following one minute.Each machine has the capability of storing twosets of snapshot information. Automatic latching isdetermined by the specified event. The event isspecified in the configuration software and/or theevent is enabled with the “ERSET” command. Whena manual snapshot is started, one of the followingthree messages will be shown on the message area.


The above message indicates that the request wasaccepted and the snapshot is latched.


The above message indicates that the requestwas denied. The request was denied because thememory was not available.


The above message indicates that the requestwas denied. The request was denied because theprevious snapshot was still in the storage process.

Refer to the “View Snapshot Data” section of theVIMSpc User Manual , FEBJ0047 for additionalinformation.


i01712155

Warning OperationSMCS Code: 7601

Table 4

WARNING OPERATION

Warning Indications (1)

WarningCategory

“AlertIndicator

Flashes ”(3)

“ActionLamp

Flashes”(4)

“ActionAlarm

Sounds ” “Operator Action Required” “Possible Result ”(2)

1 X No immediate action is required.The system needs attention soon.

No harmful effects or nodamaging effects.

2 X X (4) Change machine operation orperform maintenance to the system.

Severe damage tocomponents can occur.

2-S X X (4) X (5) Immediately change the machineoperation.

Severe damage to machinecomponents

3 X X (4) X (6) Immediately perform a safe engineshutdown.

Injury to the operatoror severe damage tocomponents can occur.

(1) The active warning indications are marked with an X.(2) This is the possible result if no action is taken by the operator.(3) The alert indicator flashes at a 8 Hz rate.(4) The action lamp flashes at a 1 Hz rate. This means that the lamp is ON for 1 second and the lamp is OFF for 1 second.(5) Steady(6) The action alarm sounds at a 1 Hz rate. This means that the alarm is ON for 1 second and the alarm is OFF for 1 second.


Gauge Cluster Module

(1) Gauge warning area. (2) Pictograph symbol.


Speedometer/Tachometer Module

(3) Tachometer(4) Symbol for engine speed(5) Ground speed readout(6) Actual gear readout for the transmission




(7) Alert indicator.(8) Data logging indicator.(9) Message area.(10) Universal gauge(11) Gauge warning area

The operator will be warned of immediate problemswith a machine system or impending problems witha machine system by VIMS.

Warning operations are activated when the VIMSelectronic control module detects a problemwith a signal. The “problem signal” reflects anabnormal condition of the machine (“data events”).Warning operations are also activated when theVIMS electronic control module detects a problemwith the control system (“maintenance/diagnosticevents”). Switches, sensors, and other electroniccontrol modules send electronic signals to the VIMSelectronic control module. The “problem signals”are listed here:

• When a condition exceeds the trip point of theswitch, the switch opens.

• When a condition exceeds the trip point of theswitch, the switch closes.

• Any abnormal sensor signal that is detected bythe VIMS electronic control module

The VIMS electronic control module analyzes the“problem signals”. The main module then notifiesthe operator by activating the appropriate warningindications on the display components. The warningindications are listed here:

• FLASHING of the alert indicator on the messagecenter. (“The alert indicator flashes approximatelyten times per second.”)

• The action lamp FLASHES. (“The action lamp ONone second and OFF one second.”)

• The action alarm is SOUNDED. (“The action alarmis turned ON for one second and turned OFF forone second for category 3 and the action alarmis turned on countinuously for category 2-S.”)

Note: More than one input is required in order toactivate some warning indications . The warningindications that are activated will be determined bythe main module.

Data events and maintenance events are classifiedinto multiple warning categories. There are fourwarning categories that are shown to the operator.The categories are based on the severity of theproblem and this dictates the response that isrequired by the operator. Warning category 1represents the least severe problem and warningcategory 3 represents the most severe problem.The warning categories are identified for theoperator according to the combination of warningindications that are active. Refer to table 4 (“WarningOperation”) . When multiple events are present, themessage area will scroll through all the events inthree second intervals. When a category 3 eventis active, scrolling through the category 1 and 2events is not permitted.

The warning category of an event may be raisedto a highercategory automatically. Event durationis used in order to determine if a change in thecategory is necessary. An example of an event thatwould require a category change: The category2 warning for the transmission lube temperaturechanges to a category 3 warning after 150 seconds.

When a category 1 or category 2 event occurs, theoperator may acknowledge the event. The operatoracknowledges the events by pressing the “OK”key on the keypad. The following information isrecorded in the event list for each event:

• Time of occurrence

• The number times the event was acknowledged.

• The machine’s location

After an event is acknowledged, the warningindications may disappear for a specified timeperiod. The warning indications will reappear for anevent that is still active after the time period elapses.These warnings may be acknowledged again.

The Category 2-S is a “conventional Category 2”with a continuous action alarm. A Category 2 that isconsidered to be a “severe”condition will cause acategory 2-S to be logged. A Category 2 tells theoperator to change “machine operation” in orderto correct the warning condition. The operator isinstructed to IMMEDIATELY change operation of themachine that relates to certain Category 2-S events.


Note: Most category 3 events cannot beacknowledged by the operator.

i01712481

Truck Payload System (TPS)General InformationSMCS Code: 7494; 7601


Block Diagram of the VIMS Off Highway Truck Payload System

The Truck Payload System is a subsystem of theVital Information Management System (VIMS). TheTruck Payload System performs the functions thatare listed here:

• Calculate payload information.

• Store payload information.

• Display payload information.

The data that is stored by the Truck Payload Systemfor each payload cycle in addition to the payloadweight is listed here:


• “Start time”

• “Start date” of the cycle

Note: This data serves as a continuous data logger.This provides the information that is listed below:

• Location of the truck

• A time stamp for each location

• Loading time

• Empty time

• Loaded time

• Loaded travel time

• Empty travel distance

• Loaded travel distance

The onboard memory of the VIMS can store amaximum of 2400 payload cycles. After 2400payload cycles have been stored in the onboardmemory of the VIMS, the new payload cyclesreplace the oldest payload cycles. The onboardpayload data can be downloaded to the service toolwith VIMSpc for further analysis. After a successfuldownload, the onboard payload data can be reset.

Payload weight data can also be broadcast viaa user supplied radio telemetry system. If theradio telemetry system has been enabled, thecalculated payload weight will be broadcast underthe following conditions:

• Each detected loader pass

• A truck has travelled “loaded” for a distance thatis greater than .16 km (0.1 miles).

• Information about the complete cycle is alsoavailable to broadcast at the end of the “payloadcycle”.

Present load cycle information is displayed on themessage center. The calculated payload weightis displayed automatically during loading. Theoperator is instructed via the message center toperform one of the following actions that is listedhere:

• Continue loading.

• The truck is fully loaded.

The operator can access various payloadparameters via the “gauge” key on the keypad atany time during the load cycle.

Payload status lamps provide feedback to theloader operator during the loading operation. Thelamps indicate whether loading should continue, orthat the truck is fully loaded. The payload statuslamps tend to minimize the amount of under-loadingand overloading that is done in the truck fleet.

Whenever the physical configuration of the truck hasbeen changed the manual calibration procedurethat represents an empty truck must be performed.The replacement of the suspension cylinders isan example of a condition that would require themanual calibration procedure.

Automatic recalibration of an empty truck occurswhen a empty truck has stopped in order tocompensate for a condition that affects the emptyweight of the truck. Conditions that can affect theempty weight of a truck are listed here: carrybackweight and the amount of fuel that is onboard.

Some parameters can be modified with the servicetool in order to support a wide range of machineconfigurations.

Information such as “total number of loads hauled”and “total weight hauled” can be displayed on themessage center. The totals can be reset by theoperator via the keypad. Resetting the totals prior to“shift change” is an example of this function.

Automatic Calibration Adjustment

Whenever the truck is “stopped empty” the VIMStruck Payload System will automatically adjust thecalibration. The calibration is adjusted for weightvariations such as fuel load and carryback weightthat may affect accuracy. The amount of adjustmentthat can take place is limited to a relatively smallrange around the original calibration values thatwere established with the service program codePAYCAL.

Collapsed Suspension CylinderDetection

Whenever the truck is “travelling empty” at aspeed less than 12 km/h (7 mph) the systemwill continuously monitor the suspension cylinderpressure. The front and rear suspension cylindersare monitored in pairs. An event is displayed whenthe pair of suspension cylinders do not respond tothe changes in pressure equally for an accumulatedtime of two minutes. The event indicates that thesuspension cylinder may be collapsed or chargedincorrectly. For example, when the VIMS detects aproblem with the left front suspension cylinder, thefollowing message is shown on the message center:



Press the “F1” key for more information. Forexample, the second line of the message center willdisplay additional diagnostic information:


Refer to the Systems Operation, RENR2635, “785C,789C, 793C and 797 Off-Highway Truck VIMSMoving Truck Payload System with Second GearWeighing” for additional information on the VIMSTruck Payload System.

i01263739

Component DescriptionsSMCS Code: 7601

The Vital Information Management System (VIMS)operates on a variety of different machines. Someof the following electrical components may not beinstalled on every machine. onboard flash softwareprovides the VIMS electronic control module with thefollowing information: type of machine and installedonboard components. Refer to the ElectricalSystem Schematic in the machine Service Manualfor component locations. The Electrical SystemSchematic may be used to verify the componentsthat are used by the VIMS.

Hardware

This manual describes the version 4.0 of VIMShardware.

The 10.0X or later class of onboard software mustbe used with version 4.0 module to gain all benefitsand features.

i01712597

VIMS Electronic ControlModuleSMCS Code: 7601-EK2; 7610


Machine Data That is Stored in the VIMSElectronic Control Module (V4.0)

The VIMS electronic control module stores thefollowing machine data in a permanent batterybacked up RAM. The flash software allows somekeypad commands and the service tool to modifythe information that is listed below:

• Product Identification Number (PIN) or SerialNumber

• Machine equipment or unit number

• Machine hours (SMH)

• Odometer

Note: Refer to Table 5 for the status of machineinformation after new onboard software has beenflashed into the onboard memory.

The following items are stored in the battery backedup RAM:

• Date

• Time

• Payload calibration

• All data files that can be downloaded

• Setting of the display unit

• Setting of the desired language

• Active events


Note: The active events are stored in memory whenthe key start switch is turned to the OFF position.

Table 5

Machine Information That is Changed By The Installation Of New VIMS Onboard Software.

Machine Information Changed By Installation of New Onboard Software(1)

Serial Number of the Machine (Product Identification Number) NO

Equipment Number of the Machine (Unit Number) NO

Machine Hours (SMH) NO

Odometer NO

Date NO

Time NO

Payload Calibration NO

Configuration Type YES(2)

The Data Files That Are Available For Download YES

Event Data YES

Data Logger YES

Changes to the configuration that were made with the ServiceProgram Codes.

YES

Payload Data YES

Language Setting YES

Unit Setting YES

Active Events At The Time The Key Start Switch is turnedTo The OFF Position.

YES

(1) The VIMS onboard software (flash file) contains the source software and the configuration software. The Caterpillar Electronic Technicianmust be used to flash this software.

(2) Installation of the new configuration software or the same configuration software clears the configuration type.

The VIMS electronic control module monitorsthe status of the machine systems continuously.The VIMS electronic control module makesdecisions based upon the input from the followingcomponents:

• Sensors

• Switches

• VIMS keypad module

• Other electronic control modules

• Internal calculations

The VIMS electronic control module sendsinformation to other electronic control moduleson the machine. The input and output of thisinformation takes place over the CAT data link.The outputs of the VIMS electronic control modulenotify the operator and the service technician of thestatus of the machine systems. The machine systeminformation that is provided by the VIMS is shownon the display modules that are listed here:

• Quad gauge module

• Speedometer/tachometer module

• Message center module

• Action lamp

• Action alarm

• Service indicator lamp

The service indicator lamp is used by the servicetechnician and the on-site maintenance personnel.The service indicator lamp is not visible from thecab. The VIMS electronic control module uses thetwo outputs of the RS-232 data link to communicatethe onboard data to the off-board systems. TheVIMS electronic control module has two 70-pinconnectors. The connectors are used to connectthe necessary harness wiring to all the systemcomponents. The module identifier (MID) for theVIMS electronic control module is listed here:

49 – VIMS electronic control module


Table 6

Description of the Contacts of Connector J1 ofthe VIMS electronic control module (1)

No. Function Type

1 + Battery Power Input

2 Ground Ground

3 T/C Outlet Input

4 HI Steering Pressure Input

5 Jacketwater Level Input

6 CAT Data Link(Left) -

Input /Output

7 CAT Data Link(Left) +

Input /Output

10 LF Strut Pressure Input(Frequency)

11 RF Strut Pressure Input(Frequency)

12 Fuel Level Input(Frequency)

13 5 kHz Frequency 9 Sensor Input(Frequency)

14 + Battery Power Input

15 Ground Ground

16 Aftercooler Level Input

17 Dimmer Switch (Down) Input

18 Dimmer Switch (Up) Input

20 LR Strut Pressure Input(Frequency)

21 RR Strut Pressure Input(Frequency)

22 Front AftercoolerTemperature

Input(Frequency)

24 Action Lamp Output

25 Return (Lamp) Return

26 T/C Inlet Temperature Input

30 RF Brake Oil Temperature Input

31 LF Brake Oil Temperature Input

32 Action Alarm Output

33 Lamp Return Return

38 RR Brake Oil Temperature Input

39 LR Brake Oil Temperature Input

40 TPMS Green Lamp Output


46 Keyswitch Keyswitch Input

(continued)

(Table 6, contd)

Description of the Contacts of Connector J1 ofthe VIMS electronic control module (1)

No. Function Type

47 Alternator R-Terminal N/A

48 TPMS RED Lamp Output

49 Lamp Return Lamp Return

57 Keypad Data Input

58 Service Lamp Output


63 Lamp Sink Input

64 LCD Lamp Sink Input

(1) J1 is a 70-pin connector. Contacts that are not listed areunused.

Table 7

Description of the Contacts of Connector J2 of theVIMS electronic control module (1)

No. Function Type

4 Location Code 3 Input

10 SPI Data Output

11 CAN (High) Input/Output

19 Digital Return Return (ground)

0 SPI Load Input

21 CAN (L) Input/Output

28 SPI Clock Output

29 CAN Shield Return

32 Port No. 1 (RS-232)(Transmit)

Output

33 Port No. 1 (RS-232)(Receive)

Input

40 RS-232 Port No. 2(Transmit)

Output

45 Steering Temperature Input(Frequency)

54 Ambient Temperature Input(Frequency)

64 + Digital 8 DCV Output

65 + Power (Instrument) (12DCV)

Output

66 Digital Return Return

68 Switch (Backlight) Input

(1) J2 is a 70-pin connector. Contacts that are not listed areunused.

Input/Output


CAT Data Link

The CAT data link (connector contacts J1-6 andJ1-7) provides a communication link with the otherelectronic control modules on the machine. TheCAT data link is bidirectional. The bidirectionalfunctionality allows the input/output of data betweenelectronic control modules. The CAT data linkpermits the sharing of information such as engineoil pressure, machine codes and diagnostics.

CAN Data Link

The CAN data link is included in the harness forfuture use.

RS-232 Data Link

The connector contacts J2-32,J2-33, J2-40 andJ2-41 of the VIMS electronic control module providetwo RS-232 serial ports. The two serial ports allowthe VIMS electronic control module to communicatewith the off-board systems. The RS-232 datalinks are bidirectional. The bidirectional functionallows the VIMS electronic control module to inputinformation and output information. One port is usedto communicate with an off-board service tool. Thesecond port is used in order to broadcast data tooff-board systems, as required.

Serial Peripheral Interface Data Link (SPI Data Link)

The VIMS electronic control module (Connectorcontacts J2-10, J2-20, J2-28 and J2-65) providesa serial port for the SPI data link. The VIMSelectronic control module uses the SPI data linkto communicate with the display modules. Powerfor these modules (connector contact J2-65) is 12Volts. The 6-pin connectors in the machine harnessfor any of the display modules can be interchangedwith any other display module. This is especiallyhelpful for troubleshooting.

Keypad Data Link

The Keypad Data Link (contact J2-57) is used toprovide a serial port for communicating keypaddata to the VIMS electronic control module.

Inputs

Sensing Input (System Voltage)

The sensing input for system voltage (connectorcontact J1-1) tells the VIMS electronic controlmodule the voltage of the machine electricalsystem. Harness wiring connects the “VIMS” circuitbreaker to this input. The voltage helps determinethe condition of the electrical system. This input isalso the +battery supply for the VIMS electroniccontrol module.

Keypad

The input for the keypad (connector contact J1-57)receives information from the keypad.

Outputs

Service Indicator Lamp

When the VIMS detects an event, the VIMSelectronic control module activates the output ofthe service indicator lamp (connector contactJ1-58) and the service indicator lamp is turned ON.The service indicator lamp remains ON wheneverthe event is active. If an event could damage themachine, the service indicator lamp is FLASHED.The service indicator lamp can be turned OFF withthe keypad. Events are not cleared from the memoryof the VIMS ECM when the service indicator lampis turned OFF. If the event becomes inactive, theservice indicator lamp is turned OFF. When poweris applied to the Vital Information ManagementSystem, the memory of the VIMS ECM is checkedfor any inactive events that have not been cleared. Ifany inactive events are found, the service indicatorlamp is FLASHED three times. If no events arefound, the service indicator lamp is FLASHED onceas a lamp test during the VIMS self test.

If an event is acknowledged via the keypad, theservice indicator lamp will not turn OFF. Refer to theSystems Operation, “Service Operations” sectionof this manual for additional information on theservice indicator lamp with the service programcode SVCLIT.

Action Lamp

The action lamp output of the VIMS electroniccontrol module (contact J1-24) is activated whena warning category 2 or 3 is present and thiswill cause the action lamp to FLASH. For moreinformation, see the Systems Operation, “WarningOperation” section.

Action Alarm

The action alarm output of the VIMS ECM (contactJ1-32) is activated when warning category “2-S”or “3” are present. This will cause the action alarmto SOUND. For more information, see the SystemsOperation, “Warning Operation” section.

Display Power Supply

The output power for the display modules of theVIMS electronic control module (contact J2-65)provides 12 DCV to the display modules that arelisted here:





VIMS Internal Battery

A long life three volt lithium battery is contained inthe VIMS electronic control module. The batteryallows the memory of the VIMS electronic controlmodule to hold data when power is removedfrom the VIMS electronic control module (OPENdisconnect switch). The time/date functions are alsopowered by the battery.

All onboard stored data is retained in battery-backedmemory. This type of memory will lose data if poweris removed. When the disconnect switch is in the ONposition, the machine electrical system will powerthe VIMS electronic control module. This allows thestored data to be retained. The backup batterytakes over when the disconnect switch is open. Thebackup battery retains only the stored data.

The backup battery also powers the date/time clockin the VIMS electronic control module when thekey start switch is in the OFF position. This is truewhether the disconnect switch is ON or OFF.

For machines in service, the backup battery isexpected to have a life of approximately 5 years.Battery replacement should be performed at a 2 to 3year interval in climates with ambient temperaturesof 0 to −40 �C (32 to −40 �F).

The failure of the backup battery causes anoperator warning and a resulting diagnostic codeto be stored in the event list. After the event forthe failure of the battery, if the key start switchis put in the OFF position and the disconnectswitch is OPEN, loss of the stored data can occurwithin several hours or less. When this warningoccurs, download the stored data immediately.Then replace the backup battery. DO NOT turn thekey start switch to the OFF position. DO NOT turnthe disconnect switch to the OFF position.

The reason that the potential loss of data is sosudden after the initial operator warning is dueto the discharge characteristics of the lithiumbattery. The lithium battery holds a constant voltagethroughout the life of the battery. Then due to thechemical breakdown (maturing) of the battery, thebattery dies very quickly. This is in contrast to thedischarge characteristics of the average flashlightbattery. The flashlight battery discharges slowlyover time, until the battery is dead.

i01263970

Display ModulesSMCS Code: 7450

The contact description for all of the displaymodules is listed in the following table.

Table 8

Contact Description of Display Module Connector

No. Function Type

1 +12 DCV Input - Power

2 Ground Ground -Power/Signal

3 SPI Clock Input - Signal

4 SPI Data Input - Signal

5 SPI Load Input - Signal

6 Harness Code Input(1)

(1) The harness code is used to give two display modules of thesame type a unique component number. This is needed sothe VIMS main module can send unique information to eachidentical module. The module number 1 is assigned to thecomponent with a grounded harness code input. The modulenumber 2 is assigned to the component with an ungroundedharness code input.

The display modules receive information fromthe main module. The operator and the servicetechnician are notified of machine system statusby the display modules. The display modules arelisted here:




Note: The Electrical Schematic in the machineService Manual and the Operation and MaintenanceManuals are helpful in identifying the displaymodules that are used on a given machine.


i01263982

Quad Gauge ModuleSMCS Code: 7450


Quad Gauge Module

(1) Gauge warning area(2) Pictograph symbol

This module contains four gauges. The gaugereceives the information from sensors. Thisinformation is provided by the VIMS electroniccontrol module or the other electronic controls overthe CAT data link. The VIMS electronic controlmodule uses the information from the sensors inorder to calculate the values that are shown on thegauges.

Each gauge is dedicated to a parameter within amachine system. Some examples of the possiblemachine system parameters are listed here: engineoil pressure, power train oil temperature, brakeoil temperature, brake air pressure, system airpressure, hydraulic oil temperature, and fuel level.Pictograph symbol (2) identifies the machinesystem parameter which is shown on each gauge.Abnormal range values are shown by the gaugewarning area (1).

i01263996

Speedometer/TachometerModuleSMCS Code: 7450


Speedometer/Tachometer module

(1) Tachometer(2) Pictograph symbol(3) Ground speed readout(4) Actual gear readout

Ground speed readout (3) consists of three digitsthat may be used in order to show the machineground speed in MPH (km/h). Use the serviceprogram code “UN” to change the unit of measure(English or metric). The VIMS calculates speed byusing the information from the output of a frequencysensor. The VIMS may also calculate speed byusing information that is obtained from a differentelectronic control over the CAT data link.

Actual gear readout (4) consists of two digitsthat show the transmission actual gear which isengaged. The left digit shows the actual gear thatis selected, “1”, “2”, “3”, etc. The right digit showsthe direction that is selected, “F”, “N” or “R”.

Tachometer (1) shows the engine speed in RPM.The VIMS calculates speed by using the informationfrom the output of a frequency sensor. The VIMSmay also calculate speed by using information thatis obtained from a different electronic control overthe CAT data link.


i01712699

Message Center ModuleSMCS Code: 7450



(7) Alert Indicator(8) Data logging indicator(9) Message area(10) Universal gauge(11) Gauge warning area

Alert indicator (7) notifies the operator of anabnormal condition in a machine system. TheVIMS electronic control module uses informationfrom the other electronic control modules on themachine to determine when an abnormal conditionis present. The VIMS electronic control module thenFLASHES alert indicator (7). When alert indicator(7) FLASHES, an abnormal condition exists. Formore information, refer to the Systems Operation,“Warning Operation” section in this manual.

Data logging indicator (8) is a series of dots thatscroll when the data logger is turned on. The dotsonly scroll when the data logger is turned on fromthe keypad.

Message area (9) identifies the machine systemparameter with an abnormal condition. The first lineshows the parameter and the parameter status. Thesecond line prompts the operator for a reaction.When alert indicator (7) is FLASHED, the machinesystem parameter with the abnormal condition isshown in the message area. For more information,refer to the Systems Operation, “Warning Operation”section in this manual. Message area (9) is alsoused to show the event list, active diagnostic eventsin “MIDXXX CIDXXXX FMIXX” format and otherrequested information.

The system default information is shown on themessage area during normal operation. The defaultinformation is referred to as the background mode.Information that is shown in the background modeis listed here:

• Time of day

• Odometer

• Total hours of the machine hours. The totalmachine hours are based on engine running time.

• On trucks, the payload weight is the informationthat is shown in the background mode when thetruck is being loaded.

• On loaders, the payload weight is also theinformation that is shown in the background modewhen the payload system is ON.

Universal gauge (10) shows a relative value ofthe parameter in message area (9). For sensortype parameters, universal gauge (10) shows therelative value of the event parameter. Switch typeparameters are not shown on universal gauge (10).Universal gauge (10) can also show the RELATIVEvalue of any valid machine system parameter.The ACTUAL value can be viewed by enteringthe desired parameter number on the keypad andpressing the “GAUGE” key or pressing the “F1” keywhile the event is present.

Gauge warning area (11) is a bar that can belocated at either end of universal gauge (10). Thebar that is used is determined by the parameterthat is being displayed. Gauge warning areas (11)may be illuminated in order to indicate an abnormalcondition. In Illustration 76, gauge warning area(11) is illuminated in order to show the abnormalcondition: “TRN TEMP HI”. The lower end of thegauge would have illuminated if there was anabnormal condition: “ENG OIL PRES LO”

Message Center Abbreviations

The Message Center Abbreviations Table providesthe abbreviation for VIMS basic words.

Table 9


Basic Word Abbreviation

A “A”

(continued)


(Table 9, contd)



AESC “AESC”

Absolute “AB”

Accept “ACCEPT”

Accumulator “ACUM”

Action ACTION

Actuator “ACTR”

Actual “ACT”

Advanced Diesel EngineManagement

“ADEM”

After “AFTR”

Aftercooler “AFTCLR”

Air “AIR”

Air Horn “AIR HORN”

Alarm “ALARM”

Ambient “AMB”

Amperes “AMPS”

And “AND”

Angle “ANGLE”

Arm “ARM”

Attachment “ATTACH”

Atmospheric “ATMOS”

Automatic “AUTO”

Auto Lube “AUTO LUBE”

AUTO Retarder Control “ARC”

Auxiliary “AUX”

Available “AVAILABLE”

Average “AVG”

Average No. 1 “AVG1”



Axle “AXLE”

Bevel “BVL”

Back BACK

Backup “BKUP”

Battery “BATT”

Between “BETWEEN”

Body “BODY”

Boom “BM”

(continued)

(Table 9, contd)



Boost “BOOST”

Bottom “BTM”

Bottom-Front “BTM F”

Bottom-Right “BTM R”

Box “BOX”

Brake “BRK”

Brake Cooler “BRKC”

Broadcast “BROADCAST”

Blocker “BLKR”

Bucket “BKT”

Cab “CAB”

Calibrate “CAL”

Calibrated “CALIBRATED”

Calibration “CAL”

Call “CALL”

Cancel “CNCL”

Carryback “CARRYBK”

Case “CASE”

Case Drain “CDRN”

CAT CAT

Center “CTR”

Change “CHNG”

Channel “CHNL”

Charge “CHRG”

Chassis Control “CC”

Check “CHECK”

Chip “CHIP”

Circuit “CRT”

Clear “CLR”

Close “CLOSE”

Closed “CLSD”

Cluster “CLUSTR”

Clutch “CLTCH”

Code “CODE”

Collapsed “CLPSD”

Command “CMD”

Communicate “COMM”

Completed “COMPLETED”

(continued)


(Table 9, contd)



Component ID “CIDs”

Conditions CONDITIONS

Console “CONSOLE”

Continue “CONTINUE”

Control “CTRL”

Coolant “COOL”

Cooler “COOLR”

Count “COUNT”

Cumulative “CUM”

Current “CUR”

Crank CRANK

Crankcase “CNKCASE”

Cylinder “CYL”

Cylinder Rod “CYLRD”

Data “DATA”

Data Link “DATA LINK”

Data Logger “DLOGR”

Dead “DEAD”

Decelerator “DECEL”

Degrees Celsius “DEG C”

Degrees Fahrenheit “DEG F”

Derate “DERATE”

Deviation “DEV”

Differ “DIFFER”

Differential “DIFF”

Digital “DIGITAL”

Direction “DIR”

Directional “DIRECTIONAL”

Disabled “DISABLD”

Display “DISP”

Distance “DISTANCE”

Down “DWN”

Downshift “DOWNSHIFT”

Drain “DRN”

Drag “DRAG”

Dragging “DR”

Drive “DRIVE”

(continued)

(Table 9, contd)



Dual “DUAL”

Dump “DUMP”

Electric Horn “ELEC HORN”

Electronic “ELEK”

Electronic Control Module “ECM”

“Elect Trans Control” “EPTC”

Empty “EMPTY”

Enable “ENABL”

Engine “ENG”

English “ENGLISH”

Enter “ENTER”

Error “ERR”

Event Recorder “EREC”

Ether “ETHER”

Event “EVENT”

Event Configure “ESET”

Exhaust “EXH”

Exit “EXIT”

Factor FACTOR

Fan “FAN”

Filter “FLTR”

Filtered “FLTRD”

Final “FNL”

Fixed “FIXED”

Float “FLOAT”

Flow “FLOW”

Front “F”

Frame Equivalent Life Average FELA

From “FROM”

Fuel “FUEL”

Fully “FULLY”

Function “FUNCTION”

Gauge “GAUGE”

Gate “GATE”

Gear “GEAR”

Good “GOOD”

Green GN

(continued)


(Table 9, contd)



Ground “GND”

Harness “HRNES”

Haul “HAUL”

Head “HD”

High “HI”

High Pressure “HIPRES”

High Pilot (pressure) “HIPLT”

Hoist “HOIST”

Hold “HOLD”

Hour “HOUR”

Hydraulic “HYD”

Identification “ID”

Impeller “IMPLR”

Idle “IDLE”

Implement “IMPL”

Incorrect “INCORRECT”

Indicator “INDICATOR”

Inhibit “INHIB”

Injector “INJ”

Injection “INJEC”

Inlet “IN”

Inputs “INPUTS”

Interface Module “I/M”

Intermittent “INTM”

Invalid “INVALID”

Junk “JUNK”

Key KEY

Keypad “KPAD”

Kickout “KO”

Known “KNOWN”

Ladder “LADDER”

Latch “LATCH”

Latitude “LAT”

Lamp “LAMP”

Last “LAST”

Left “LT”

Left - Front “LTF”

Left - Rear “LTR”

(continued)

(Table 9, contd)



Level “LVL”

Lever “LVR”

Lift “LFT”

Lighting “LIGHTING”

Limit “LIMIT”

Limited “LIMITED”

Link “LINK”

Linkage “LNKG”

List “LIST”

Load “LOAD”

Loaded “LOADED”

Loading “LOADING”

Lock “LCK”

Lockout “LCKOUT”

Lockdown “LOCKDN”

Lockup “LCKUP”

Longitude “LON”

Loop “LOOP”

Loss “LOSS”

Low “LO”

Lower “LOWER”

Lubrication “LUBE”

Machine “MACH”

Machine Control “M/C”

Main “MAIN”

Manual “MANUAL”

Maximum “MAX”

Measure “MEASURE”

Message “MSG”

Mile “MILE”

Mismatch “MISMATCH”

Mode “MODE”

Modified “MODIFIED”

Modulate “MODULATE”

Module “MODUL”

Motor “MTR”

Moving “MOV”

Movement “MVMT”

(continued)


(Table 9, contd)



Must “MUST”

Neutral “NTRL”

Neutralizer “NTLRZR”

New “NEW”

No “NO”

Nominal “NOM”

Not “NOT”

Off “OFF”

Oil “OIL”

On “ON”

Open “OPEN”

Operator “OPERATOR”

Operating “OPRG”

Out “OUT”

Outlet “OUT”

Output “OUTPUT”

Over “OVER”

Overstroke “STROKE”

Parameters “PARAMETERS”

Park “PRK”

Parking “PRKG”

Parking Brake “PARKBK”

Pass “PASS”

Payload “PAYLOAD”

Peak PEAK

Pedal “PDL”

Percent “%”

Perform “PERFORM”

Personality “PRSNALTY”

Pilot “PLT”

Pitch “PITCH”

Pitch Per Second “PITCH/SEC”

Plugged “PLGD”

Port “PORT”

Position “POS”

Power “POWER”

Power Shift “PS”

(continued)

(Table 9, contd)



Power train “PT”

Prepare “PREPARE”

Press “PRESS”

Pressure “PRES”

Pressure-Front “PRESF”

Pressure-Rear “PRESR”

Previous “PREVIOUS”

Primary “PRI”

Print “PRINT”

Programmable “PROG”

Proportional “PROP”

Pull “PULL”

Pump “PMP”

Purge “PURGE”

Quick-shift “QUICKSHIFT”

RPM “SPD”

Rack “RACK”

Rack Per Second “RACK/SEC”

Rackback “RKBCK”

Raise “RAISE”

Range “RANGE”

Rate “RATE”

Rated “RATED”

Rear “R”

Rear Inside “RI”

Recorder “RECORDER”

Red “RD”

Reel “REEL”

Relay “RELAY”

Relief “RLF”

Renewal “RENEWAL”

Remote “REMOTE”

Report “REPORT”

Request “REQ”

Required “REQD”

Resolver “RESOLVER”

Response “RESPONSE”

(continued)


(Table 9, contd)



Restart “RESTART”

Restrictor “RESTR”

Retarder “RETRDR”

Retarder “RETARDER”

Return “RTN”

Review “REVIEW”

Ride “RIDE”

Right “RT”

Right-Front “RTF”

Right-Rear “RTR”

Rimpull “RIMPULL”

Rod “RO”

Run “RUN”

Scale “SCALE”

Screen “SCREEN”

Second “SEC”

Secondary “SEC”

Select “SELECT”

Sensor “SNSR”

Service “SERV”

Set “SET”

Shift “SHIFT”

Shop “SHOP”

Short “SHORT”

Shorted “SHORTED”

Shutdown “SHUTDN”

Signal “SIG”

Slip “SLIP”

Slowly “SLOWLY”

Snapshot “SNAPSHOT”

Solenoid “SOL”

Speed “SPD”

Speedometer/Tachometer “SPDOM/TACH”

Start “START”

Starter “STARTER”

Status “STATUS”

Steer “STR”

Steering “STRG”

(continued)

(Table 9, contd)



Steering Pump “STRPMP”

Stop “STOP”

Stroke “STROKE”

Subtracted “SUBTRACTED”

Supply “SUPPLY”

Suspension “SUSP”

Swing/Implement “SWG/IMP”

Swing “SWG”

Switch “SW”

System “SYS”

TPMS “TPMS”

Tank “TANK”

Temperature “TEMP”

This “THIS”

The “THE”

Then “THEN”

Throttle “THROTTL”

Tilt “TLT”

Time “TIME”

Timing “TIMING”

Tire “TIRE”

Ton “TON”

To “TO”

Too “TOO”

Top “TOP”

Top - Front “TOP F”

Top - Left “TOP LT”

Top - Rear “TOP R”

Top - Right “TOP RT”

Torque Converter “TC”

Torque “TORQ”

Total “TOTAL”

Trailer “TRL”

Trailer Brake Cooler “TRLBRKC”

Transmission “TRN”

Travel “TRVL”

Truck Payload MeasurementSystem

“TPMS”

(continued)


(Table 9, contd)



Turbo “TRBO”

Uncalibrated “UNCALIBRATED”

Unfiltered “UF”

Unknown “UNKNOWN”

Update “UPD”

Upshift “UPSHIFT”

User “USER”

Valve “VLV”

Variable “VAR”

Vital Information DisplaySystem

“VIDS”

Vital Information ManagementSystem

“VIMS”

Voltage “VOLTAGE”

Wastegate “WASTEGATE”

Weigh “WT”

Weight “WT”

Without “W/O”

Yes “YES”

i01264147

KeypadSMCS Code: 7450

Table 10

Contact Description of the Keypad Connector

No. Function Type

1 +12 DCV Input

2 Ground Ground

3 Keypad Data Output

4 Unused -


Keypad

(1) Gauge key(2) Key pressed indicator(3) Backward arrow key(4) Forward arrow key(5) F1 key

The keypad allows the operator or the servicetechnician to communicate with the VIMS electroniccontrol module. The user can select the desiredinformation that is shown on the message center.The operator or the service technician can initiateservice procedures. The keypad also allows theoperator to enter an identification number and thekeypad also allows the operator to acknowledgeevents.

Pressing any key on the keypad causes keypressed Indicator (2) to FLASH once. This tells theoperator or the service technician that the keystrokewas accepted.

When a series of related keystrokes (operator IDor service program code) must be entered, eachkeystroke must be completed in less than fiveseconds. Periods that last longer than five secondswill cancel any previous keystroke (s). The messagecenter will then return to the previous display mode.

i01264237

OK KeySMCS Code: 7450

The “OK” key is used to complete keypad entriesand the “OK” key is used to acknowledge events.Some examples of the operation of the “OK” keysare listed below:

• Responses to system prompts

• Entering an operator identification number

• Stopping the requested gauge parameter


• Return the message center to the backgrounddisplay.

i01264270

Gauge KeySMCS Code: 7450

The “GAUGE” key is used to request parameterinformation. The information will be displayed onthe universal gauge and the message area of themessage center module. The key may be used intwo different ways.

First method: Press the “GAUGE” key once inorder to display the first available gauge parameteron the first line of the message area. The secondline of the message area displays the values of thegauge parameter. The parameter’s relative valuesare displayed on the universal gauge. An exampleof the message area is shown here:


This information is shown for one parameter at atime. The FORWARD and BACKWARD arrow keysare used to scroll through the available parameters.

Second method: Enter the number of the parametervia the keypad. Then press the “GAUGE”key.This method saves time by accessing a specificparameter directly. Otherwise scrolling through theentire parameter list would be necessary.

Requested data remains on the message centermodule until the OK key is pressed. The backgroundinformation (time of day and total machine hours)then reappears. During the loading cycle, payloadweight is shown for off-highway trucks and largewheel loaders.

Any previously selected gauge function ordefault data is overridden when an abnormalcondition exists. The occurrence of an abnormalcondition will cause the event information to bedisplayed on the message area. After the abnormalcondition is corrected or the abnormal conditionis acknowledged, the original gauge parameterinformation will be displayed on the message area.

Use the Parameter Table for a complete list of VIMSparameter names and corresponding numbers. Notall the parameters in the table are used with everymachine. If an invalid parameter number (XXX) isentered, the message area shows:


An example of the message area display for arequested parameter with a failure is shown here:


Pressing the “F1” key toggles the message centerdisplay in order to show service information. Thismode replaces the ERR text with a meaningfuldescription of the problem. An example of themessage center is shown here:


Note: For a listing of message center text and FMIcodes, refer to the Troubleshooting, RENR2631,“Toubleshooting Diagnostic Codes ”.

i01261858

Arrow KeysSMCS Code: 7450

These keys allow the user to scroll forward andbackward through information that is shown on themessage center.


i01264366

ID KeySMCS Code: 7450

This key is used by the operator to enter aidentification number. This number is stored withall event information that may follow, until a newidentification number is entered. Printed reportsshow this number with each event. The Operator IDis not required to operate the machine.

The following message is displayed on the messagearea after the “ID” key is first pressed.


The operator enters an identification number up toseven digits. Then press the “OK” key. The numbersthat are entered are shown on the second line ofthe message area.


Input Key Functions

OK – Accept the desired operator ID.

ID – Clear the entry line in order to enter anadditional operator ID.

GAUGE – Abort the entry mode.

LEFT ARROW – Delete the last character.

Press the “OK” key within five seconds of enteringthe last keystroke of the operator ID. Otherwise,the operator ID function will be aborted and themessage center will return to the previous displaymode.

Note: If an event occurs during the operator IDfunction, the operator ID function is aborted andreplaced with event information.

i01264425

Function KeysSMCS Code: 7450

“F1” Key

The “F1” key (5) is used by the operator to requestadditional information about maintenance (system)and data (machine) events.

• DIAGNOSTIC EVENTS

When a diagnostic type of maintenance event isdisplayed on the message center, pressing the “F1”key will access additional diagnostic information.The diagnostic information is shown on the secondline of the message area.


The additional diagnostic information is listed here:MID, CID, and FMI. An example of the diagnosticinformation is shown here:


Pressing the “F1” key again would show theinformation that was previously shown on thesecond line.

• DATA EVENTS

When a data event is displayed on the messagecenter, pressing the “F1” key will access additionalparameter information.



The parameter value and the unit will be displayedon the second line of the message center. Anexample of the parameter information is shownbelow:


Pressing the “F1” key again would show theinformation that was previously shown on thesecond line of the message area.

Note: Single Pole Single Throw (SPST) switchesare either OPEN or switches are CLOSED, sothese switches do not have CID or FMI diagnosticinformation. Diagnostics for switches will bedisplayed as the switch status: OK, OPEN,NEUTRAL, UP, etc. An example of the status displayis shown here:


Note: Double Pole Single Throw (DPST) switchescan have diagnostic codes.

“F2” Key

The “F2” key is not used.

“F3” Key

The “F3” key is not used.

i01264478

Numeric KeysSMCS Code: 7450

These keys are used to enter numeric information.Some examples of numeric information are listedhere: operator identification number, serviceprogram codes, requested operator responses, andselection of individual gauge parameters.

i01264516

SwitchesSMCS Code: 1435; 7332

Note: The switches that are listed in this sectionmay NOT be used on all machines.

Switches provide an open, ground or a +batterysignal to the switch type inputs of the VIMSelectronic control module. A switch can be openor closed.

• When a switch is open, no signal is provided tothe corresponding input of the VIMS electroniccontrol module. This “no signal” condition is alsocalled “floating”.

• When a switch is closed, the ground signalor the +battery signal are provided to eachcorresponding input of the VIMS electronic controlmodule.

Oil Level Switch


Oil Level Switch (“Engine, Hydraulic”)

(1) Switch(2) Schematic symbol

Oil level switch (1) is closed to ground duringnormal operation. The switch opens when the oillevel is less than the minimum level. When theswitch opens the VIMS electronic control modulewarns the machine operator of the low oil level. Offthe machine (“on the bench”), the switch is openwith the float in the DOWN position.


Steering Flow Switches


Steering Flow Switches

(1) Schematic symbol(2) Switch

During normal operation, steering flow switch (2) isclosed to ground. The switch opens when the oilflow in the steering system is less than the specifiedlimit. The VIMS electronic control module warns theoperator that the oil flow of the steering systems islow when the switch is open. Switch (2) is used inthe primary steering systems and the supplementalsteering systems. Off the machine (“on the bench”),the switch is normally open.

Filter Indicator Switches

Plunger Type


Filter Bypass Switch


Filter bypass switch (1) has a plunger within theswitch that closes the contacts with an acceptablepressure drop across the filter. The switch closesthe signal circuit to ground during normal operation.When the pressure across the filter is greater thanthe specified limit the switch plunger moves in orderto allow the switch contacts to open. The VIMSelectronic control module will warn the operator thatthe filter is restricted when the switch is open. Offthe machine (“on the bench”), the switch is normallyopen.

Note: The VIMS electronic control module takes thefluid temperature into consideration before warningthe operator. Cold fluid has a higher viscosity whichcauses a higher differential pressure across thefilter than fluid at normal operating temperature.When the fluid temperature is below a specifiedlimit, the filter bypass event is ignored by the VIMSelectronic control module. The temperature inhibit isnot used with the fuel filter.

Differential Pressure Type


Differential Pressure Switch

(1) Switch(2) Typical schematic symbol(3) Filter inlet port(4) Filter outlet port

Differential pressure switch (1) is activated by apressure difference between the filter inlet port (3)and filter outlet port (4). The switch contacts areheld closed by a spring inside the switch duringnormal operation. When the pressure at filter inletport (3) exceeds the pressure at filter outlet port(4) by a specified amount, the force of the springis overcome and the switch contacts are opened.The VIMS electronic control module will warn theoperator that the filter is restricted when the switchis open. Off the machine (“on the bench”), theswitch is closed because there is no pressuredifference between ports (3) and (4).


Coolant Flow Switch


Coolant Flow Switch


During normal operation, coolant flow switch (1)is closed to ground as coolant flows against thepaddle. The switch opens when coolant flow is lessthan the specified limit. The VIMS electronic controlmodule warns the operator of the low coolant flowin the engine cooling system when the switch isopen. Off the machine (“on the bench”), the switchis open.

Steering Pressure Switch


Steering Pressure Switch

(1) Schematic symbol(2) Switch

During normal operation, steering pressure switch(1) is closed to ground. The switch is open whenthe pressure within the steering system is less thanthe specified limit . When the pressure within thesteering system is greater than the specified limit,the switch is closed. Switch contact B and contactC are closed when the switch is not installed on themachine (“on the bench”). Switch contact A andcontact B are open when the switch is not installedon the machine (“on the bench”). The normallyclosed contacts (B and C) are not used in thisapplication.

i01264669

SensorsSMCS Code: 1408-NS

Note: The sensors that are listed in this section mayNOT be used on all machines.

Sensors provide the VIMS electronic control modulewith input information about changing conditions.The sensors provide information such as speedand temperature. The sensor signal changes in aproportional manner in order to reflect the changingcondition. The types of sensor signals that arerecognized by the VIMS electronic control moduleare listed here:

Frequency – The sensor produces an AC signal thatvaries in frequency (“Hz”) as the condition changes.

Pulse width modulated (PWM) – The sensorproduces a digital signal with a duty cycle thatvaries as the condition changes. The frequency ofthis signal is relatively constant and the frequencycontains no information.

Frequency Sensors

Frequency sensors produce a sine wave signal orsquare wave signal that varies in frequency (“Hz”)as the condition changes.


Suspension Cylinder Pressure Sensor



(1) Schematic symbol(2) Sensor




Suspension cylinder pressure sensor (2) reactsto the pressure in a suspension cylinder. Thesensor receives operating power from the machineelectrical system. The sensor sends a square wavesignal that increases in frequency as the suspensioncylinder pressure increases to the VIMS electroniccontrol module. The signal voltage is relativelyconstant and the voltage contains no information.In order to determine the suspension cylinderpressure, the VIMS electronic control modulemeasures the frequency of the signal. Calibrationof the VIMS truck payload system is required afterreplacement of the suspension cylinder pressuresensor.

Pulse Width Modulated Sensors(PWM)


Pulse Width Modulated Signal


Typical Schematic of a PWM Sensor

Pulse width modulated sensors (PWM) produce adigital signal with a duty cycle that varies as thecondition changes. The frequency remains constant.


Temperature Sensor - Fluids AndAmbient Air


Fluid Temperature Sensor


Temperature sensor (2) reacts to the temperatureof fluids such as hydraulic oil, power train oil, orengine coolant. The sensor receives operatingpower from the VIMS electronic control module.The sensor sends a signal that changes as thefluid temperature changes to the VIMS electroniccontrol module. The VIMS measures the duty cycleof the sensor signal in order to determine the fluidtemperature.

Temperature Sensor - Engine ExhaustGas


Engine Exhaust Gas Temperature Sensor


Temperature sensor (2) reacts to the temperature ofengine exhaust gas. The sensor receives operatingpower from the VIMS electronic control module. Thesensor sends a PWM signal which changes as thetemperature of the engine exhaust gas changes tothe main module. The control measures the dutycycle of the sensor signal in order to determine thetemperature.

Pressure Sensor


Pressure Sensor


Pressure sensor (2) reacts to system pressuresuch as system air pressure. The sensor receivesoperating power from the VIMS electronic controlmodule. The sensor sends a PWM signal to theVIMS that changes in proportion to the air pressure.The VIMS measures the duty cycle of the sensorsignal in order to determine the pressure.

Coolant Loss Sensor


Coolant Loss Sensor

(1) Sensor(2) Schematic symbol(3) Plastic sleeve (“see note”)


The coolant loss sensor is an electronic switch thatis activated by coolant. During normal operation,coolant loss sensor (1) is closed to ground. Theswitch opens when the coolant level is too low. TheVIMS electronic control module warns the operatorof a very low coolant condition in the cooling systemwhen the switch opens. The sensor has a connectorwith three contacts. Contact “A” connects to the+8 DCV sensor power from the VIMS electroniccontrol module . Contact “B” connects to groundand contact “C” (switch output) connects to theinput of the VIMS electronic control module . Off themachine (“on the bench”), when power and groundare disconnected the switch is open. The sensorcannot be tested in this state.

Note: DO NOT remove plastic sleeve (3) from theprobe. This plastic sleeve is required for properswitch operation.

The internal electronic switch that is in this sensorfunctions as a mechanical switch. The switch iseither open or the switch is closed to ground.(“connector contact C closed to contact B”). Thissensor works with ONLY water or water/glycolsolutions (“antifreeze”). The sensor will not work withoils, fuels, etc. A pull-up voltage must be present atthe signal lead. The pull-up voltage is used in orderto pull up the open circuit voltage, when a loss ofcoolant has caused the switch to open. This pull-upvoltage (5 VDC) is supplied by the VIMS electroniccontrol module . The pull-up voltage can only bemeasured with a multimeter when the switch isopen. When there is 5 volts present on the signallead during normal operation the switch is open.

Fuel Level Sensor - Ultrasonic Type


Fuel Level Sensor - Ultrasonic Type

(1) Schematic symbol. (2) Float. (3) Guide tube. (4) Sensor.

Fuel level sensor (4) reacts to the level of the fuel inthe fuel tank. Sensor (4) emits an ultrasonic signalup guide tube (3). The ultrasonic signal is reflectedoff a metal disk on the bottom of float (2) and thesignal returns to the sensor. The sensor measuresthe travel time of the ultrasonic signal. The traveltime includes the time to the float and the timeback to the sensor. The sensor also measures thetemperature of the fuel in order to compensateaccordingly. The status “(open or grounded)” ofconnector contact 3 indicates whether the sensor isinstalled in a deep tank or a shallow tank. Contact3 should be open for a tank (“deep”) that has amaximum depth of 2300 mm (90 inch). Contact3 should be grounded for a tank (“shallow”) thathas a maximum depth of 1150 mm (45 inch). Thesensor receives operating power from the machineelectrical system. The VIMS electronic controlmodule receives a PWM signal from the sensorthat changes as the fuel level changes. The VIMSelectronic control module measures the duty cycleof the sensor signal in order to determine the fuellevel.

Note: The fuel level sensor cannot be bench tested.The sensor must have fuel in guide tube (3) in orderto operate properly. The sensor can be tested onlywhile the sensor is installed on a machine. Forspecifications and test procedures, see the Testingand Adjusting, RENR2631, “PWM Sensor Tests” .

i01264967

Data ConnectorsSMCS Code: 1408-CY; 7553


RS-232 Port For Downloading

9D-3374 Connector



Mating Connector For Downloading Cable

8C-6313 Connector


8D-9537 Cap

i01261845

Action LampSMCS Code: 7431


Action Lamp Symbol

The action lamp connects to connector contactJ1-24 of the VIMS electronic control module. Theaction lamp is an LED that is located within theoperator’s viewing area. The FLASHING of theaction lamp tells the operator that a condition exists.The condition will require changing the operation ofthe machine. The VIMS electronic control moduleFLASHES the action lamp whenever a warningcategory 2, 2S or 3 problem exists.

i01261835

Action AlarmSMCS Code: 7407


Action Alarm

(1) Schematic symbol(2) Action alarm

The action alarm always connects to connectorcontact J1-32 of the VIMS electronic control module.The intermittent SOUNDING of the action alarm(category 3) tells the operator to shutdown themachine immediately. The VIMS electronic controlmodule will SOUND the action alarm, whenever acategory 3 warning exists.

A category 2 special warning will sound this alarmcontinuously. This indicates an urgent need tomodify machine operation.

The action alarm does not operate when theengine is stopped. The VIMS electronic controlmodule gets information from the engine controlin order to determine that the engine is running.The action alarm SOUNDS, as required. The actionalarm SOUNDS when the engine is running and acategory 2 special warning or a category 3 warningis present.


i01265000

Payload LampsSMCS Code: 1430-LMP; 7494-LMP


Truck Payload Lamp

(1) Truck Payload Lamp(2) Schematic

The output for the red payload lamp is connector J1contact 48 of the VIMS electronic control module.The output for the green payload lamp is connectorJ1 contact 40 of the VIMS electronic control module.These outputs are connected to the truck payloadlamps. The red payload lamps and the greenpayload lamps are located outside the cab in anarea that is easily seen by the loader operator thatis loading the truck. The payload lamps can beturned ON by the VIMS electronic control moduleatvarious stages of the truck loading process.

i01265003

Service LampSMCS Code: 7431-LMP


Service Lamp

(1) Service Lamp(2) Schematic

The service lamp is connected to the servicelamp output of the VIMS electronic control module(connector J1 contact 58). The service lamp has a“blue lens”. The service lamp is located outside thecab in an area that is easily seen by someone thatis a distance away from the machine. The servicelamp is turned ON in order to warn the servicepersonnel that the VIMS electronic control modulehas detected an active event (“data or machine”).A flashing service lamp indicates that the eventcould be damaging to the machine. If the eventbecomes inactive, the service lamp is turned OFF.However, the event is stored in the memory of theVIMS electronic control module.

When power is applied to the VIMS module (“ keystart switch to the ON position”), the main modulememory is checked for any inactive events. If anyevents are found, the service lamp is FLASHEDthree times. If no events are found, the service lampis FLASHED once. The service lamp can be resetvia the keypad or the off-board service tool evenif the event is still active. For more information,see the Systems Operation, “Service Operations”section of this manual.


i01264881

Related ComponentsSMCS Code: 1408

Machine Batteries, Alternator And ElectricalSystem

The VIMS electronic control module monitors thevoltage of the machine electrical system. Thecontrol measures the system voltage. The controlthen determines whether the system voltage iswithin specified limits. The voltage is measuredat the +battery input (“unswitched”) of the VIMSelectronic control module (“connector contact 1”).

Other Electrical Components

Some machines have electronic control modulesthat are not part of the VIMS, but the electroniccontrol modules communicate with the VIMS. TheCAT data link connects these electronic controlstogether. This allows the sharing of information suchas engine oil pressure, engine speed, harnesscodes and diagnostic information. For example,an engine control sends engine speed informationto the main module over the CAT data link. In thissituation, the engine speed sensor is not part of theVIMS.

Solenoids


(1) Solenoid(2) Schematic symbol

The solenoid is used in order to allow the VIMS tocause action. This action could be activating a lubesystem or stopping the engine.

Diode Assemblies


(1) Schematic symbol of the type A diode assembly(2) Schematic symbol of the type B diode assembly(3) Diode assembly

Diode assembly (3) is installed at all solenoids thatare NOT activated by an electronic control module.The assembly is installed between the machineharness and the solenoid. These solenoids couldinclude various hydraulic solenoid valves and thehorn solenoid. Using the diode assemblies reducesthe amount of electrical noise that is created by theoperation of these solenoids. Electrical noise cancause erratic operation of VIMS. The type A diodeassembly is used on most solenoids. The typeB diode assembly is used on the air conditionerclutch solenoid.

Service Keyswitch


Service Keyswitch

(1) Keyswitch(2) Schematic symbol

The service keyswitch is used in order to accessthe VIMS without turning the key start switch of themachine to the ON position.


i01265011

ParametersSMCS Code: 7601-NQ

Table 11

VIMS Parameter Description List

ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource

Module(s)SignalType Parameter Description

99THROTTL LCKENABL

Throttle LockEnable Switch

36 Calculated “Indicates the position (ON or OFF)of the throttle lock enable switch.”

100 ENG SPD Engine Speed 36 Frequency “The actual rotational speed ofthe crankshaft. The sensor ismounted on the flywheel housing(994) or on the camshaft (engineECM). The sensor generatesa frequency-varying signal asthe teeth on the gear pass. Thefrequency-varying signal is sentto an ECM. The ECM uses thefrequency-varying signal in order todetermine the speed of the engine.”

101 TRBO IN PRES Turbo InletPressure

36 Analog “The turbocharger inlet air pressuresensor sends the engine ECM avoltage that varies as the pressurechanges. The engine ECM thencalculates the pressure according tothe voltage that is received.”

102 LT TRBO INPRES

LeftTurbochargerInlet Pressure

36 Analog “The left bank turbocharger inletpressure sensor sends the engineECM a voltage that varies as thepressure changes. The engineECM then calculates the pressureaccording to the voltage that isreceived.”

103 RT TRBO INPRES

Right Turbo InletPressure

36 Analog “The right bank turbocharger inletpressure sensor sends the engineECM a voltage that varies as thepressure changes. The engineECM then calculates the pressureaccording to the voltage that isreceived.”

104 PEAK AIR FLTR Peak Air Filter(Restriction)

36 Calculated “This is used to show the peakor maximum air filter restrictionfor a given period of time. Theengine ECM calculates the valueby subtracting the atmosphericpressure value from the turbo inletpressure value.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


104 AIR FLTR Air Filter(Restriction)

36 Calculated “Indicates the degree to which theengine air filter is plugged. Theengine ECM uses the parametersof atmospheric air pressure andturbocharger inlet air pressure tocalculates the degree to which theengine air filter is plugged. Enginepower is derated 2 percent per kpaof pressure difference above 6.5kpa, up to a maximum of 20 percenttotal engine derate. If the engineECM senses that either one of thesepressure sensors are sending anincorrect value, the engine power isalso derated up to 20 percent.”

105 BOOST PRES Boost Pressure 36 Analog “The turbocharger outlet pressuresensor sends the engine ECM avoltage that varies as the pressurechanges. The engine ECM thencalculates boost according tothe voltage that is received bysubtracting atmospheric pressure. ”

106 LT EXH TEMP Left ExhaustTemperature

36 PWM “The temperature within the left bankexhaust manifold of the engine. AnECM receives a signal that changesin pulse width as the exhaust withinthe left exhaust manifold changestemperature. The ECM uses thepulse width that it receives in orderto determine the temperature.”

107 RT-LT EXHTEMP

Right MinusLeft ExhaustTemperature

49 Calculated “This is calculated by VIMS bysubtracting the left manifold exhausttemperature from the right manifoldexhaust temperature.”

108 RT EXH TEMP Right ExhaustTemperature

36 PWM “The temperature within the rightexhaust manifold of the engine. AnECM receives a signal that changesin pulse width as the exhaust withinthe right exhaust manifold changestemperature. The ECM then usesthe pulse width that it receives todetermine the temperature.”

109 TRBO OUTPRES

Turbo OutletPressure

36 Analog “The turbocharger outlet pressuresensor sends the engine ECM avoltage that changes as the pressurechanges. The engine ECM thencalculates the pressure according tothe voltage received.”

110 AFTCLR TEMP AftercoolerTemperature(Coolant)

36/49 PWM “Engine aftercooler coolant outlettemperature. An ECM receives asignal that changes in pulse widthas the engine aftercooler coolantoutlet temperature changes. TheECM then uses the pulse widththat it receives to determine thetemperature.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


111 F AFTRCLRTEMP

FrontAftercoolerTemperature(Coolant)

36/49 PWM “The temperature in the front sectionof the engine aftercooler. An ECMreceives a signal that changes inpulse width as the coolant in the frontsection of the engine aftercoolerchanges temperature. The ECMuses the pulse width that it receivesto determine the temperature.”

112 R AFTRCLRTEMP

Rear AftercoolerTemperature(Coolant)

36/49 PWM orAnalog

“The temperature in the rear sectionof the engine aftercooler. An ECMreceives a signal that changes inpulse width as the coolant in therear section of the engine aftercoolerchanges temperature. The ECMuses the pulse width that it receivesto determine the temperature. ”

113 START AID SW Start Aid Switch 36 Switch “Indicates the status of the start aidfunction (ON or OFF).”

114 WASTEGATEPOS

WastegatePosition

36 Analog “The position of the wastegate valveon the turbocharger (outlet). Thewastegate position sensor has anoutput that changes in voltage as thewastegate valve position changes.From this voltage, the engine ECMcalculates the wastegate position.”

115 COOL FAN SPD Cooling FanSpeed

36 Frequency “The speed of the engine cooling fanshaft. The sensor mounted on thisshaft generates a frequency varyingsignal that changes as the speed ofthe cooling fan changes. From thissignal, the engine ECM calculatesthe engine cooling fan speed.”

116 ENG COLDMODE

Cold ModeStatus

36 Calculated “Indicates the cold mode status(active or inactive) as calculated bythe engine ECM.”

117 ENG DERATE EnginePower DeratePercentage

36 Calculated “Used to request and read thepresent engine power deratepercentage. Zero indicates enginepower is NOT derated.”

118 AIR FLTR Peak Air FilterRestriction

36 Calculated “Indicates the peak air filterrestriction as calculated by theengine ECM.”

119 ETHER INJEC Ether Injection 36 Calculated “Indicates when ether is beinginjected into an engine to aidstarting.”

120 FUEL POS Fuel Position 36 Calculated “This is calculated by the engineECM after considering the desiredengine speed, fuel ratio control(FRC), and actual engine speed.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


121 ENG LOAD Engine Load 36 Calculated “This is calculated by the engineECM after considering the enginespeed, throttle switch position,throttle position, boost pressure, andatmospheric pressure and is shownas a percent of a full load.”

122 FUEL FLTR Fuel Filter(Bypass)

36/49 Switch “The status of the fuel filter(PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingan ECM that the filter is PLUGGED.With normal operation, the switch isclosed to ground.”

123 FUEL LVL Tank Fuel Level 49 PWM “This is the tank fuel level and ismeasured by the ultrasonic fuel levelsensor that is mounted in the bottomof the fuel tank. This sensor sendsan ECM a pulse that varies in widthas the fuel level changes. The fuellevel is then calculated according tothe pulse width that it receives. Thesensor also takes the temperatureof the fuel into consideration, andchanges the pulse width accordingly.”

125 THROTTL POS Throttle Position 36 PWM “The position of the throttle footpedal. The throttle position sensorhas an pulse output that changesin width as the foot pedal positionchanges. The engine ECM usesthe pulse width that it receives todetermine the throttle position.”

126 FUEL FLOW Fuel Flow 36 Calculated “This is calculated by VIMS from theFuel Flow Engl parameter receivedfrom the engine ECM. The FuelFlow Engl value (parameter 127, ingal/sec), is converted to this fuel flow(parameter 126). This representsthe rate at which fuel is used by theengine. The units for this parameterare gallons per hour.”

127 FUEL FLOWENGL

Fuel Flow(English Units)

36 Calculated “This is calculated by the engineECM. It is used to show the rateat which fuel is used by the engine(English units). It is used on oldermachines. The units are gallons persecond.”

128 FUEL PRES Fuel PressureFiltered(Primary)

49 PWM “The fuel pressure after the fuelfilter.”

129 ENG FUEL RATE Engine FuelRate

36 Calculated “This is calculated by the engineECM, and is the rate at which fuelis used by the engine. The units areliters per hour.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


130 ENG OIL LVL Engine Oil Level 36/49 Switch “Used to tell the engine ECM whenthe engine oil level is less than theminimum desired level. With low oillevel, the switch is open. In normaloperation, the switch is closed toground.”

131 ENG OIL PRES Engine OilPressure

36/49 Analog “The oil pressure inside the engine.The sensor sends to an ECM avoltage that varies as the pressurechanges. The ECM then calculatesthe pressure according to thevoltage that it receives. Actualwarning pressure depends upon theengine speed.”

132 ENG OIL PRESAB

Engine OilPressure(Absolute)

36 Analog “The oil pressure (absolute) insidethe engine. The sensor sends to anECM an voltage that varies as thepressure changes. The ECM thencalculates the pressure according tothe voltage that it receives. Actualwarning pressure depends uponthe engine speed. Atmosphericpressure is taken into account forthis calculation.”

133 CNKCASE PRES CrankcasePressure

36 Analog “The pressure inside the crankcase.The sensor sends the engine ECMa voltage that varies as the pressurechanges. The engine ECM thencalculates the pressure according tothe voltage that it receives.”

134 ENG COOLFLOW

Engine CoolantFlow

49 Switch “This switch notifies VIMS of thecoolant flow status in the enginecooling system (water jacket). Duringnormal operation, the coolant flowswitch is closed to ground. Theswitch opens when coolant flow isless than specified.”

135 ENG COOLTEMP

Engine CoolantTemperature

36/49 PWM “The coolant temperature in theengine cooling system. An ECMreceives a signal that changes involtage or pulse width as the enginecoolant temperature changes.The ECM then determines thetemperature from the signal itreceives.”

136 HYD COOLRBLKR

HydraulicCooler Blocker

49 Switch “The state of the Hydraulic Oil CoolerBlocker function.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


137 AFTRCLR LVL Aftercooler(Coolant) Level

49 Switch “This switch notifies VIMS of thestatus of the aftercooler coolantlevel. The switch (sensor) openswhen the coolant level is low.During normal operation the switchis closed to ground. This switch(sensor) is an capacitive type switchthat is activated only by water oranti-freeze.”

138 ENG COOL LVL Engine CoolantLevel

49 Switch “This switch notifies VIMS of thestatus of the engine coolant level.The switch (sensor) opens whenthe coolant level is low. Duringnormal operation the switch isclosed to ground. This switch(sensor) is an capacitive type switchthat is activated only by water oranti-freeze.”

140 SYS VOLTAGE System Voltage 49 Calculated “The actual voltage that existsbetween machine battery positiveand frame ground measured at themain module.”

141 MAIN PILOTPRES

Main PilotPressure

49 PWM “The hydraulic systems mainpilot pressure. This pilot pressureincludes the swing, implement andtravel pilot pressures. An ECMreceives a signal that varies in pulsewidth as the pressure changes.”

142 IMPL PRES Implement PilotOil Pressure

49 PWM “Indicates the pressure of the pilotoil for implements. An ECM receivesa signal that varies in pulse width asthe pressure changes.”

144 UNFLTR OILPRES

Unfiltered OilPressure

36 Analog “The absolute pressure (inlcudesatmospheric pressure) of the engineoil before the engine oil filter. Theengine ECM receives a voltage thatchanges as the pressure changes.”

145 HI BOOST PRES Boost PressureFront or RearHigh

49 Calculated “This parameter monitors thewarning status parameter from theengine ECM to determine if the frontor rear boost pressure is high.”

146 LO BOOSTPRES

Boost PressureFront or RearLow

49 Calculated “This parameter monitors thewarning status parameter from theengine ECM to determine if the frontor rear boost pressure is low.”

147 CNKCASE PRES CrankcaseAir Pressure(Gauge)

36 PWM “The pressure of the air inside thecrankcase.”

149 COLD CYLCUTOUT

Cold CylinderCutout

36 Calculated “Used to read and program the ColdCylinder Cutout Strategy status.”

150 AVE CYL TEMP Engine CylinderNo. 1 ExhaustTemperature

36 Analog “The temperature of engine cylinderNo. 1 exhaust.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


151 INJ-CYL 1 TEMP Engine CylinderNo. 1 ExhaustTemperature


















160 INJ-CYL 10TEMP

Engine CylinderNo. 10 ExhaustTemperature


161 INJ-CYL 11TEMP



162 INJ-CYL 12TEMP



163 INJ-CYL 13TEMP



164 INJ-CYL 14TEMP



165 INJ-CYL 15TEMP


36 Analog “The temperature of engine cylinderNo. 15 exhaus.”

166 INJ-CYL 16TEMP



(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


167 ENG PRELUBE Engine Pre-Lube Mode

36 Calculated “Indicates which mode the enginepre-lube system is in. Enginepre-lube modes:”Pre-Lube is OFFPre-Lube is ONPre-Lube is DISABLEDPre-Lube is COMPLETED

168 LT AIR FLTR RES Left Air FilterRestriction

36 Calculated “The pressure drop across theleft bank air filter is calculatedby subtracting the left turbo inletpressure from the atmosphericpressure.”

169 RT AIR FLTRRES

Right Air FilterRestriction

36 Calculated “The pressure drop across theright bank air filter is calculatedby subtracting the right turbo inletpressure from the atmosphericpressure.”

171 ENG OIL PRESST

Engine OilPressure Status

36/34/33 Calculated “The status of the engine oil pressure(OK, LO or HI).”

172 CRNK WO INJST

Crank WithoutInjection Status

36/34/33 Switch “Reads the crank without injectionstatus (OFF or ON).”

173 THROTTL SW1ST

Throttle SwitchNo. 1 Status

36 Switch “Indicates the status of throttle switchNo. 1. When the switch contacts areclosed (grounded) the status is ON.”

174 THROTTL SW2ST



175 THROTTL SW3ST



176 THROTTL SW4ST



177 RT AIR FLTR Right Air FilterRestriction

36 Switch “This is the pressure drop across theright bank air filter. An open switchmeans a plugged filter.”

178 LT AIR FLTR Left Air FilterRestriction

36 Switch “This is the pressure drop across theleft bank air filter. An open switchmeans a plugged filter.”

179 AIR FLTRSTATUS

Air FilterRestrictionStatus

36 Switch “The status of the air filter(PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allows theswitch contacts to open telling thean ECM that the filter is PLUGGED.With normal operation the switch isclosed to ground.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


180 ENG STATUS Overall TruckEngine Status.

36 Calculated “Indicates the engine status. Thisparameter provides the status(enabled or disabled) of the followingfeatures:”Altitude DerateCold ModeCell ThrottleElevated IdleEngine DerateEngine SpeedCold Cylinder CutoutLow FUel PressureEmergency Stop ShutdownFuel InjectionHigh Hydraulic Oil TemperatureHigh Coolant TemperatureLow Oil Pressure

181 ALTERNATOR#1

Alternator No.1 49 Frequency “The speed as indicated by thealternator R terminal signal. The Rterminal signal is affected by belt slipand the alternator health.”

182 ALTERNATOR#2

Alternator No.2 87 Frequency “The speed as indicated by thealternator R terminal signal. The Rterminal signal is affected by belt slipand the alternator health.”

184 THROTTLBYPASS

Throttle Bypass 36 Switch “The throttle override status. Thestatus is either OFF or ON.”

188 TURBO INLETTEMP

Turbo InletTemperature

36 Analog “The temperature of the turbo inletair to the engine.”

230 FNL LUBE PRES Final Drive LubeLow Pressure

116 Switch “The status (OK, LOW or HIGH) ofthe final drive (differential) pumppressure, as indicated by a switch orsensor.”

231 BVL DIFF FLTR Diferential(Bevel Gear)Filter Status

116 Switch “The status (PLUGGED or OK) ofthe differential (bevel gear) filter asindicataed by a switch or sensor.”

232 BVL PMP PRES Differential(Bevel Gear)Lube Pressure

116 PWM “The differential (bevel gear) lubepressure. The ECM reads the pulsewidth of the signal and determinesthe pressure from the signal that isreceived.”

233 FNL LUBE FLTR Final Drive FilterSwitch

116 Switch “The position (PLUGGED or OK)of the final drive (differential) filterswitch.”

234 DIFF OIL LVL Differential OilLevel

116 Switch “The position of the differential (driveaxle) oil level switch.”

235 DIFF TEMP Differential OilTemperature

116 PWM “The temperature of the oil in thedifferential (axle). The ECM readsthe pulse width of the signal anddetermines the pressure from thesignal that is received.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


240 GND LVLSHUTDN R

Ground LevelShutdownSignal Rear

36 Switch “The status (ON or OFF) of therear engine ground level shutdownswitch.”

250 GND LVLSHUTDN F

Ground LevelShutdownSignal Front

33 Switch “The status (ON or OFF) of thefront engine ground level shutdownswitch.”

251 ENG DERATE F Engine DeratePercentageFront

33 Analog “This indicates the present frontengine power percentage. Zeroindicates the engine is not derated”

252 GOV STATUS F SlaveGoverningStatus FrontEngine

34 Calculated “Indicates the governing status(ALONE or SLAVE) of the frontengine slave ECM.”

253 F AFTRCLRTEMP

FrontAftercoolerTemperature(Coolant)

33 PWM “The temperature of the coolantin the engine front aftercoolersystem. ON MACHINES WITHTWO ENGINE AFTERCOOLERCOOLANT TEMPERATURESENSORS THIS REFERS TO THEFRONT ENGINE AFTERCOOLERCOOLANT TEMPERATURE.”

254 AIR FLTR F Engine PeakAir Filter(Restriction)Front

33 Calculated “Reads the peak air filter restrictionof the front engine. ”

255 BOOST PRES F Engine Outlet(Boost)Pressure Front

33 Analog “The pressure downstream on thecompressor discharge side of theturbocharger on the front engine.”

256 CNKCASE PRESF

EngineCrankcasePressure Front

33 PWM “The pressure inside the crankcaseof the front engine.”

258 F ENG LOAD Engine LoadFront

33 Analog “The actual percentage of frontengine load.”

259 ENG OIL FLTR F Engine Oil FilterDifferentialPressure(Gauge) Front

33 PWM “The pressure drop across theengine oil filter for the front engine.”

260 ENG OIL LVL F Engine Oil LevelFront

33 Switch “The level of the oil in the crankcasefor the front engine.”

261 ENG OIL PRES F Engine OilPressure Front

33 Analog “The oil pressure inside the frontengine. The sensor sends to anECM a voltage that varies as thepressure changes. The ECM thencalculates the pressure according tothe voltage that it receives. Actualwarning pressure depends upon theengine speed.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


262 F ENG STATUS Engine StatusFront

33 Calculated “The front engine status. Thisparameter provides the status(enabled or disabled) of the followingfeatures: ”Altitude DerateCold ModeCell ThrottleElevated IdleEngine DerateEngine SpeedCold Cylinder CutoutLow FUel PressureEmergency Stop ShutdownFuel InjectionHigh Hydraulic Oil TemperatureHigh Coolant TemperatureLow Oil Pressure

263 F WASTEGATEPOS

Front WastegatePosition

33 Analog “The position of the wastegate valveon the front engine turbocharger(outlet). The wastegate positionsensor has an output that changesin voltage as the wastegate valveposition changes From this voltagethe front eng ECM calculates thewaste gate position.”

264 F FUEL FLTR Engine FuelFilter StatusFront

33 Switch “The status of the front engine fuelfilter (PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingan ECM that the filter is PLUGGED.With normal operation, the switch isclosed to ground.”

265 BOOST PRES HIF

High BoostPressure Front

49 Analog “The front turbocharger outletpressure sensor sends the engineECM a voltage that varies as thepressure changes. The engine ECMthen calculates boost accordingto the voltage that is received bysubtracting atmospheric pressure.”

266 OIL PRES F LO Low OilPressure Front

49 Switch “This parameter monitors the enginestatus parameter to see if the frontengine oil pressure is low.”

267 EXH TEMP LTF Engine LeftFront TurboExhaustTemperature

33 PWM “The temperature of the exhaust onthe left bank of the front engine.”

268 EXH TEMP RTF Engine RightFront TurboExhaustTemperature

33 PWM “The temperature of the exhaust onthe right bank of the front engine.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


269 F RT- F LT EXHTEMP

Front RightMinus FrontLeft ExhaustTemperature

49 Calculated “This is calculated by an ECM bysubtracting the front engine rightexhaust manifold temperature fromthe front engine left exhaust manifoldtemperature.”

270 ENG FUEL RATEF

Engine FuelRate Front

33 Calculated “The rate at which fuel is being usedby the front engine.”

271 ENG SPD F Engine SpeedFront

33 Frequency “The actual rotational speed of thecrankshaft on the front engine.”

273 F TRBO IN PRES Engine TurboInlet PressureFront

33 Analog “The pressure (absolute) of the aircoming into the right turbo for thefront engine.”

274 F LO BOOSTPRES

Low BoostPressure Front

49 Calculated “This parameter monitors thewarning status parameter of theengine ECM to see if the boostpressure is low.”

275 ENG DERATE R Rear EnginePower Deratepercentage

34 Analog “Indicates the present rear enginepower derate percentage. Zeroindicates the engine is not derated.”

276 GOV STAT R SlaveGoverningStatus RearEngine

34 Calculated “Indicates the governing status(ALONE or SLAVE) of the rearengine slave ECM.”

277 R AFTRCLRTEMP

Rear AftercoolerTemperature

34 PWM “The temperature of the coolant inthe rear engine aftercooler system.”

278 BOOST PRES R Engine TurboOutlet (Boost)Pressure Rear

34 Analog “The pressure on the compressordischarge side of the turbocharger ofthe rear engine.”

279 ENG LOAD R Engine LoadRear

34 Calculated “The actual percentage value of rearengine load.”

280 ENG OIL PRES R Engine OilPressure Rear

34 Analog “The oil pressure in the rear enginelubrication system. ”

281 ENG STATUS R Engine StatusRear

34 Calculated “The rear engine status. Thisdetermines the priority of enginestatus messages displayed onservice tools.”

282 WASTEGATEPOS R

WastegatePosition Rear

34 Analog “The position of the wastegate valveon the rear engine turbocharger(outlet). The wastegate positionsensor has an output that changesin voltage as the wastegate valveposition changes. From this voltage,the engine ECM calculates thewastegate position.”

283 FUEL FLTR R Engine FuelFilter StatusRear

34 Switch “The status (PLUGGED or OK) ofthe rear engine fuel filter.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


285 R RT-LT EXHTEMP

Rear RightMinus LeftExhaustTemperature

49 Calculated “This is calculated by VIMSby subtracting the rear engineleft exhaust manifold exhausttemperature from the rear engineright exhaust manifold exhausttemperature. ”

286 ENG FUEL RATER

Engine FuelRate Rear

34 Calculated “The rate at which fuel is being usedby the rear engine. ”

287 ENG SPD R Engine SpeedRear

34 Frequency “The actual rotational speed of therear engine crankshaft. ”

289 OIL PRES R LO Low OilPressure Rear

49 Switch “This parameter monitors the enginestatus parameter from the engineECM to see if the rear engine oilpressure is low. ”

290 EXH TEMP LTR Engine LeftRear TurboExhaustTemperature

34 PWM “The temperature of the exhaust onthe left side of the rear engine. ”

291 EXH TEMP RTR Engine RightRear TurboExhaustTemperature

34 PWM “The temperature of the exhaust onthe right side of the rear engine. ”

292 TRBO IN PRES R Engine TurboInlet PressureRear

34 Analog “The pressure (absolute) cominginto the right turbo the front engine(uses atmospheric pressure). ”

293 AIR FLTR R Engine PeakAir Filter(Restriction)Rear

34 Calculated “Reads the peak air filter restrictionof the rear engine. ”

294 CNKCASE PRESR

EngineCrankcasePressure Rear

34 PWM “The pressure inside the crankcaseof the rear engine. This pressurereading remains constant withchanges in the altitude. ”

295 ENG COOLTEMP R

Engine CoolantTemperature(Jacket) Rear

34 Analog “The coolant temperature in the rearengine cooling system. ”

296 ENG OIL FLTR R Engine Oil FilterDifferentialPressure(Gauge) Rear

34 Switch “The pressure drop across the rearengine oil filter. ”

297 ENG OIL LVL R Engine Oil LevelRear

34 Switch “The level of the oil in the rearengine. ”

298 BOOST PRES HIR

High BoostPressure Rear

49 Switch “This parameter monitors thewarning status of the rear engineECM to see if high boost pressureexist. ”

299 BOOST PRESLO R

Low BoostPressure Rear

49 Switch “This parameter monitors thewarning status of the rear engineECM to see if boost pressure is low. ”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


303 PT OIL FLTR Power Train OilFilter

49 Switch “The status of the Power Train OilFilter (PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, meaningacceptable pressure drop, the switchcontacts are closed and the circuitis grounded. Cold oils often causea known filter restriction, so VIMSignores warnings (open switch)when oil temperature is below about125 degrees F.”

305 TRN GEAR TransmissionGear

81 Switch “This is calculated by thetransmission ECM and indicates theactual gear that the transmission isin.”

306 GEAR SELECT TransmissionCane Select

81 Calculated “The gear that the operator hasselected in the machine cab. Aswitch on the gear select leverconverts lever position into digitalcode for use by the transmissionECM. ”

310 TC FLTR TorqueConverter Filter(Bypass)

49/81 Switch “The status of the torque converterinlet oil filter (PLUGGED or OK).When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isplugged. With normal operation,the switch contacts are closed andthe circuit is grounded. Cold oilsoften cause a known filter restriction,so VIMS ignores warnings (openswitch) when oil temperature isbelow about 125 degrees F.”

311 TC OUT SPD TorqueConverterOutput Speed

27/49/81 Frequency “The speed of the torque converteroutput shaft. The sensor sends asignal to an ECM that is proportionalin frequency depending on thetorque converter output shaft speed.The ECM then calculates the speedbased upon the frequency that isreceived.”

312 TC SCREEN TorqueConverterScreen

49/81 Switch “The status of the torque converteroutlet screen (filter) (PLUGGEDor OK). As the torque converterscreen becomes PLUGGED, thepressure across the screen causesthe torque converter screen to bebypassed. When this bypass occurs,this switch opens telling VIMS thatthe torque converter screen needsto be replaced or cleaned.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


313 TC OUT TEMP TorqueConverterOutletTemperature

49/81 PWM “The oil temperature on the outletside of the torque converter. VIMSreceives a signal that changes inpulse width as the torque converteroutlet oil temperature changes. VIMSthen determines the temperaturefrom the pulse width that it receives.”

314 TC TEMP TorqueConverterTemperature

49 PWM “The oil temperature on the outlet ofthe torque converter. VIMS receivesa signal that changes in pulsewidth as the torque converter oiltemperature changes. VIMS thendetermines the temperature from thepulse width that it receives.”

315 TC OUT PRES TorqueConverterOutlet Pressure

49 PWM “The oil pressure on the outlet side ofthe torque converter. VIMS receivesa signal that changes in pulse widthas the pressure changes. VIMS thencalculates the pressure according tothe pulse width that it receives.”

322 QUICKSHIFT SW QuickshiftSwitch Position

81 Calculated “The position of the quickshift switch(ON or OFF).”

323 LUC ENABLE Lockup ClutchEnable SwitchPosition

81 Switch “The position of the lockup clutchenable switch (ON or OFF).”

324 PMP DRIVETEMP

Pump Drive OilTemperature

81 PWM “The actual implement pumpoil temperature. VIMS receivesa signal that changes in pulsewidth as the pump oil temperaturechanges. VIMS then determines thetemperature from the pulse widththat is received.”

325 DIFF TEMP DifferentialTemperature(Oil)

49 PWM “The oil temperature inside of thedifferential axle. VIMS receives asignal that changes in pulse widthas the differential oil temperaturechanges. VIMS then determines thetemperature from the pulse widththat it receives.”

326 DIFF CHIP Differential Chip(Detector)

49 Switch “This switch notifies VIMS ifchips have been detected in thedifferential. As metal chips collecton the magnetic contacts of theswitch, a short circuit is made fromone terminal to the other causinga closed circuit to ground. Duringnormal operation, the switch isin the open position. The switchis considered closed when theresistance between the two switchterminals is between zero andapproximately 2K ohms.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


327 DIFF FLTR SW Differential FilterSwitch (Bypass)

30/49/116 Switch “The status of the differential axle oilfilter (PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingVIMS that the differential filter isPLUGGED. With normal operation,meaning acceptable pressure drop,the switch contacts are closed toground.”

328 DIFF LUBEPRES

Differential LubePressure

30/49/116 PWM “The lubrication pressure within thedifferential axle housing. A pressuresensor sends to an ECM a pulsethat varies in width as pressurechanges. The ECM then calculatesthe pressure according to the pulsewidth that it receives.”

329 TRN P1 PRES TransmissionPressure P1

81 PWM “The transmission P1 (controlsystem) pressure.”

330 TRN P2 PRES TransmissionPressure P2

81 PWM “The transmission P2 (clutch-fill)pressure.”

331 IMPLR CLTCHPRES

Impeller ClutchPressure

81 PWM “The impeller clutch pressure. Apressure sensor sends to an ECM apulse that varies in width as pressurechanges. The ECM then calculatesthe pressure according to the pulsewidth that is received.”

332 LUC SOL CMD Lockup ClutchCurrent (Amp)Percentage

81 Calculated “The solenoid command (or current)as a percentage of maximum whichis being delivered to the lockupclutch solenoid.”

333 RIMPULLSTATUS

ReducedRimpull Status

81 Switch “The status (ACTIVE or INACTIVE)of the reduced rimpull feature.”

337 TRN IN SPD TransmissionInput Speed

81 Frequency “The actual rotational speed ofthe output shaft of the torqueconverter which is the input to thetransmission.”

339 TRN LATCHPRES

TransmissionLatchingPressure

81 Frequency “The transmission latching pressure.The transmission ECM receivesa signal to determine if thetransmission is latched or unlatced.”

340 TRN LCKOUT ST TransmissionLockout Status

81 Calculated “The status of the transmissionlock, which inhibits the transmissionfrom going into gear while theservice technician is working on themachine.”

341 TRN OIL LVL TransmissionOil Level

81 PWM “The status of the transmission oillevel.”

342 TRN OIL PRES TransmissionOil Pressure

81 PWM “The transmission lube oil pressure.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


343 TRN LCKOUTSW

TransmissionLockout Switch

81 Calculated “The position of the transmissioncontrol lever in the cab: ”REVERSEFORWARDNEUTRALNOT-IN-REVERSE

346 TRN COLDMODE

TransmissionCold Mode

81 Calculated “Indicates the cold mode status(active or inactive) as calculated bythe transmission ECM.”

347 TRN OUT SPD 2 TransmissionOutput Speed 2

81 Frequency “The speed of the transmissionoutput shaft. This signal comesthrough the transmission speeddistributor and is sent to thetransmission ECM. The transmissionoutput speed is directly proportionalto ground speed.”

349 TRN GEAR TransmissionGear

27/81 Switch “This is calculated by EPTC(electronic programmabletransmission ECM) or transmissionECM and indicates the actual gearthat the transmission is in.”

350 TRN LUBE TEMP TransmissionLubeTemperature

49/81 PWM “The transmission lubrication oiltemperature. VIMS receives asignal that changes in pulse widthas the transmission lubrication oiltemperature changes. VIMS usesthe pulse width that it receives todetermine the oil temperature.”

351 GEAR SELECT Gear Select (ByOperator)

27/81 Switch “The gear that the operator hasselected in the machine cab. Aswitch on the gear select leverconverts lever position into digitalcode for use by the transmissionECM. (used on the 797 instead of306 due to the difference in gearcodes)”

354 PREVIOUSGEAR

Previous Gear 27 Calculated “No longer used.”

355 TRN OUT SPD TransmissionOut Speed

27/81 Frequency “The speed of the transmissionoutput shaft. This signal goesthrough the transmission speeddistributor (OHT) and is sent to thetransmission ECM. The transmissionoutput speed is directly proportionalto ground speed.”

355 TRN OUT SPD1 TransmissionOutput Speed 1

81 Frequency “The speed of the transmissionoutput shaft. This signal goesthrough the transmission speeddistributor (OHT) and is sent to thetransmission ECM. The transmissionoutput speed is directly proportionalto ground speed.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


356 TRN CHRG FLTR TransmissionCharge Filter(Bypass)

49/81 Switch “The status of the transmissioncharge filter (PLUGGED or OK). Thetransmission charge line supplies oilto the hydraulic control valves of thetransmission. When the pressureacross the filter is greater thanthe specified pressure, the switchplunger moves and allows the switchcontacts to open, telling VIMS thatthe filter is PLUGGED.”

357 TRN LUBE FLTR TransmissionLube Filter(Bypass)

49 Switch “The status of the transmissionlubrication filter (PLUGGED or OK).When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isplugged. With normal operation,meaning acceptable pressure drop,the switch contacts are closed toground. The transmission lube circuitprovides lubrication to the clutchdisks, bearings, etc.”

358 TRN SLIP TransmissionSlip (OHT)

27 Calculated “The degree to which thetransmission is slipping at thecompletion of a shift. This iscalculated by the transmissionECM. In this calculation, thetransmission input and outputspeeds are compared. This timeis the summation of time for thetransmission control solenoids(up/dowm), actuator the up/downsolenoid control, clutch fill, andactual slippage of the transmissionplates/disk.”

359 LCKUP SLIP Lockup Slip 27 Calculated “The degree to which the torqueconverter lockup clutch is slippingwhen entering the lockup state. Thisis calculated by the transmissionECM. In this calculation, the torqueconverter input and output speedsare compared. Total sliptime is madeup of individual actuation times muchlike parameter 358.”

360 GEAR CHNGCODE

Gear ChangeCode

27 Calculated “Used in trends. Reads the gearchange code of the slip packet.Calibrated by the transmissioncontrol.”

361 GEAR MVMTTIME

Gear MovementTime

37 Calculated “Used in trends. Reads the gearmovement time of the slip packet.Calibrated by the transmissioncontrol.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


362 TRN LUBE TEMP TransmissionLubeTemperature

49 PWM “The temperature of the transmissionlubrication oil. VIMS receives asignal that changes in pulse widthas the transmission lubrication oiltemperature changes. VIMS thenuses the pulse width that it receives,to determine the transmissionlubrication temperature.”

364 TRN PMP PRES Transmission(Oil) PumpPressure

49 PWM “The lube oil pressure within thetransmission. The pressure sensorsends to VIMS a pulse that variesin width as the pressure changes.VIMS then calculates the pressureaccording to the pulse width that isreceived.”

365 TRN FLTR TransmissionFilter (Bypass)

49 Switch “The status of the transmission oilfilter (PLUGGED or OK). Whenthe pressure across the filter isgreater than the specified pressure,the switch plunger moves allowingthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation the switchcontacts are closed and the circuitis grounded. Cold oils often causea known filter restriction, so VIMSignores warnings (open switch)when oil temperature is below about125 degrees F.”

366 NTRL SW Neutral Switch 27/81 Switch “This tells the transmission ECMwhether the transmission shiftlinkage is the neutral position. Whenthe switch is in the neutral position,the operator is allowed to crank theengine.”

369 NTLRZR SW NeutralizerPressure SwitchPosition

81 Switch “Reads the position (RUN orNEUTRAL) of the neutralizerpressure switch.”

370 RIMPULL % ControlledRimpullPercentage

81 Calculated “Used to read percent of maximumrimpull which is being controlled bythe transmission ECM based onreduced rimpull setting and torqueconverter pedal modulation. This isnot the actual or available rimpull,which is affected by equipmentoperation.”

371 IMPLR CLCHCUR

Impeller ClutchCurrent (Amp)Percentage

81 Calculated “The current as a percentage ofmaximum which is being deliveredto the impeller clutch solenoid fromthe transmission ECM.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


372 RIMPULLSELECT2

ReducedRimpullSelectionSwitch Position

81 Switch “The position of the reduced rimpullselection switch.”LOWMEDIUM LOWMEDIUM HIGHHIGH

373 RIMPULLSTATUS 2

ReducedRimpullON/OFF SwitchPosition

81 Switch “The position of the reduced rimpullON/OFF switch.”

374 PARKBK Parking BrakePressure SwitchStatus

81 Switch “Used to read the status of theparking brake pressure switch.Pressure is LOW (open) (parkingbrake is engaged) Pressure isHIGH (closed) (parking brake isdisengaged).”

376 BRK PRES SW Braking SystemPressure Switch

116 Switch “The present state of the servicebrake. ON (switch is closed) or OFF(switch is open). ”

377 BRK PUMP SPD Braking CoolingPump Speed

116 Sensor “The speed of the brake coolingpump (0 to 2000 RPM)”.

378 BRK COOL FLTRF

Front BrakeCooling FilterBypass

87 Switch “The status of the front brake coolingfilter (PLUGGED or OK).”

379 PARKBK DRSTATUS

Parking BrakeDragging Status

116 Calculated “The dragging status of the parkingbrakes. Dragging brake means thebrake pressure sensor indicates theparking brake is engaged, howeverthe operator is not asking to engagethe brake and the brake ECM is nottrying to engage the brake.”

380 RETRDR Retarder 83/116 Switch “The status of the retarder system.This parameter will display either anON or OFF state.”

381 BRK COOL FLTRR

Brake CoolingFilter BypassRear

116 Switch “The status of the rear brake coolingfilter (PLUGGED or OK).”

382 BRK LOCKDN Remote ParkBrake Set

116 Switch “The status of the parking brake lock.The active (ON) status indicatesthe parking brake is engaged. Theinactive (OFF) status indicates theparking brake is disengaged.”

415 SERV BRKPEDAL

Service BrakePedal PositionStatus

36 Switch “Read the position of the servicebrake pedal as released (OFF) ordepressed (ON).”

416 PARKBK PRESLTR

Left RearParking BrakeOil Pressure

116 PWM “The oil pressure for the left rearparking brake. The pressure sensorsends to VIMS a pulse that variesin width as the pressure changes.VIMS then calculates the pressureaccording to the pulse width that itreceives.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


417 PARKBK PRESRTR

Right RearParking BrakeOil Pressure

116 PWM “The oil pressure for the right rearparking brake. The pressure sensorsends to VIMS a pulse that variesin width as the pressure changes.VIMS then calculates the pressureaccording to the pulse width that itreceives.”

418 LTR WHEEL SPD Left Rear WheelSpeed

27/116 Frequency “Used to read the actual rotationalspeed of the left rear axle in RPM.”

419 RTR WHEELSPD

Right RearWheel Speed

27/116 Frequency “Used to read the actual rotationalspeed of the right rear axle in RPM.”

436 RTR-RTF BRKTEMP

Right RearMinus RightFront BrakeTemperature

49 Calculated “This is calculated by VIMS, bysubtracting the right front braketemperature from the right rear braketemperature.”

437 LTR-LTF BRKTEMP

Left Rear MinusLeft Front BrakeTemperature

49 Calculated “This is calculated by VIMS, bysubtracting the left front braketemperature from the left rear braketemperature.”

438 STRG OIL PRES Steering PumpOil PressureSensor

49 PWM “The steering oil pressure at thepump outlet. VIMS receives a signalthat changes in pulse width as thesteering oil pressure changes. VIMSthen determines the pressure fromthe pulse width that it receives.”

440 STRG OIL PRES Steering PumpPressure

49 Switch “Notifies VIMS of low steering oilpressure. With low pressure theswitch would be open. In normaloperation, the switch is closed toground.”

441 LO STRG PRES Low SteeringPressure

49 Switch “Notifies VIMS of low oil pressureat the pump outlet in the steeringsystem. With low pressure, theswitch will be open. In normaloperation, the switch is closed toground.”

442 HI STRG PRES High SteeringPressure

49 Switch “Notifies VIMS of low oil pressureat the accumulator outlet in thesteering system. With low pressure,the switch should be open to ground.In normal operation, the switch isclosed to ground.”

444 STRG OIL TEMP Steering OilTemperature

49 PWM “The main steering system oiltemperature. VIMS receives a signalthat changes in pulse width as themain steering system oil temperaturechanges. VIMS then determines theoil temperature from the pulse widththat it receives.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


445 FAN DRIVE FLTR Fan Drive OilFilter Bypass

116 Switch “The status of the Fan Drive Oil FilterBypass (PLUGGED or OK). Whenthe pressure across the filter isgreater than the specified pressure,the switch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is plugged.With normal operation, the switchcontacts are closed and the circuitis grounded. Cold oils often causea known filter restriction, so VIMSignores warnings (open switch)when oil temperature is below about125 degrees F. ”

445 STRG OIL FLTR “Steering OilFilter”

49 Switch “The status of the main steeringsystem oil filter (PLUGGED or OK).When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isplugged. With normal operation,the switch contacts are closed andthe circuit is grounded. Cold oilsoften cause a known filter restriction,so VIMS ignores warnings (openswitch) when oil temperature isbelow about 125 degrees F.”

447 STRG OILLEVEL

Steering OilLevel

49 Switch “This switch notifies VIMS of thestatus of oil level in the main steeringsystem (LO or OK). The switchopens when steering oil level is lessthan the specified. During normaloperation, the switch is closed toground.”

448 STRG/TRN LCK Steering/TransmissionLock

49 Switch “The status of the steering andtransmission lockout systems. Aswitch with two outputs (normallyclosed and normally open) is usedas inputs to notify the transmissionECM of the lockout condition. At anygiven time one input must always beconnected to ground and the othermust be open. If this case is not so,the transmission ECM knows thatthere is a failure in the system. Whensteering/transmission lockout isactive, the steering and transmissionsystems are not allowed to function.”

449 PRI STRG PRES PrimarySteeringPressure

49 Switch “The status of the oil pressure on theprimary side of the steering system(LO or OK). This pressure switchis normally connected to ground.When the pressure becomes lowerthan a specified level, the switchopens notifying VIMS that there islow oil pressure.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


450 F BRK OIL TEMP Front Brake OilTemperature

49 PWM “The temperature of the coolingoil from both front brakes. VIMSreceives a signal that changesin pulse width as the front brakesystem cooling oil changestemperature. VIMS then determinesthe temperature from the pulse widththat it receives.”

451 R BRK OIL TEMP Rear Brake OilTemperature

49 PWM “The temperature of the cooling oilfrom both rear brakes. VIMS receivesa signal that changes in pulse widthas the rear brake system cooling oilchanges temperature. VIMS thendetermines the temperature from thepulse width that it receives.”

452 BRK/AIR PRES Brake AirPressure

49 PWM “The air pressure in the brakingsystem. The pressure sensor sendsto VIMS a signal that varies in widthas the brake air system pressurechanges. VIMS then calculates thepressure according to the pulsewidth that is received.”

453 PARKBK Parking Brake 49/81/116

Switch “The status of the parking brake(ON or OFF). With the parking brakeoff the switch is open, but whenthe parking brake is on, a groundsignal is sent to an ECM. A warningmessage will be generated if theparking brake is engaged while themachine is not in neutral.”

454 BRK FLTR Brake Filter 49 Switch “The status of the filter in theoil cooling line for the brakes(PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allows theswitch contacts to open telling VIMSthat the filter is PLUGGED.”

455 BRK TEMP BrakeTemperature

49 PWM “The temperature of the brake oil.VIMS receives a signal that changesin pulse width as the brake oiltemperature changes. VIMS thendetermines the temperature from thepulse width that it receives.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


456 BRK STROKE Brake Stroke 49 Switch “This is a switch(s) that tells VIMSif the brake master oil line pressureis too low or if one of the masterbrake cylinders (there can be morethan one brake stroke switch, inwhich case they would be wired in aseries circuit) has overstroked. In afailed state, the normal switch pathto ground will be opened, notifyingVIMS that there is a problem withat least one of the brake mastercylinders.”

457 PRI BRK PRES Primary BrakePressure

49 Switch “This is the status of the primarybrake pressure switch. In normaloperation the switch is closed toground, but when the brake isapplied the switch is open.”

458 SEC BRK PRES SecondaryBrake Pressure

49 Switch “The status of the secondary brakelever pressure switch. The status ofthe secondary brake pressure switchis closed when the secondary brakelever has been applied (parkingbrake).”

460 LTF BRK TEMP Left Front BrakeTemperature

49/116 PWM “The cooling oil temperature fromthe left front brake. VIMS receivesa signal that changes in pulsewidth as the temperature of the oilcoming from the left front brakechanges. VIMS then determines thetemperature from the pulse widththat is received.”

461 LTR BRK TEMP Left Rear BrakeTemperature

49/116 PWM “The cooling oil temperature fromthe left rear brake. VIMS receivesa signal that changes in pulsewidth as the temperature of theoil coming from the left rear brakechanges. VIMS then determines thetemperature from the pulse widththat is received.”

462 RTF BRK TEMP Right FrontBrakeTemperature

49/116 PWM “The oil temperature from the rightfront brake. VIMS receives a signalthat changes in pulse width as thetemperature of the oil coming fromthe right front brake changes. VIMSthen determines the temperaturefrom the pulse width that is received.”

463 RTR BRK TEMP Right RearBrakeTemperature

49/116 PWM “The cooling oil temperature fromthe right rear brake. VIMS receivesa signal that changes in pulsewidth as the temperature of the oilcoming from the right rear brakechanges. VIMS then determines thetemperature from the pulse widththat is received.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


464 RTF-LTF BRKTEMP

Right FrontMinus LeftFront BrakeTemperature

49 Calculated “This is calculated by VIMS bysubtracting the left front braketemperature from the right frontbrake temperature.”

465 RTR-LTR BRKTEMP

Right RearMinus LeftRear BrakeTemperature

49 Calculated “VIMS calculates this value bysubtracting the left rear braketemperature from the right rear braketemperature.”

466 PARKBK PRESSW

Parking BrakeFilter Switch

49 Switch “The parking brake filter status(PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, the switchcontacts are closed and the circuitis grounded.”

467 BRK COOL FLTRF

Front BrakeCooling FilterStatus

49 Switch “The status of the front brake coolingfilter. When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isPLUGGED. With normal operation,the switch contacts are closed andthe circuit is grounded.”

468 BRK COOL FLTRR

Rear BrakeCooling FilterStatus

49 Switch “The status of the rear brake coolingfilter. When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isPLUGGED. With normal operation,the switch contacts are closed andthe circuit is grounded.”

470 F BRK OIL PRES Front Brake OilPressure

49 PWM “The oil pressure at the inlet of thefront brakes. The pressure sensorsends VIMS a pulse that variesin width as the pressure changes.VIMS then calculates the pressureaccording to the pulse width that isreceived.”

471 R BRK OIL PRES Rear Brake OilPressure

49 PWM “The oil pressure at the inlet of therear brakes. The pressure sensorsends VIMS a pulse that variesin width as the pressure changes.VIMS then calculates the pressureaccording to the pulse width that isreceived.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


472 F BRK ACUMPRES

Front BrakeAccumulatorPressure

49 Switch “The front brake accumulatorpressure. This pressure switchis normally connected to ground.When the pressure becomes lowerthan the desired level, the pressureswitch opens, notifying VIMS thatthere is low pressure in the frontbrake accumulator system.”

473 R BRK ACUMPRES

Rear BrakeAccumulatorPressure

49 Switch “The rear brake accumulatorpressure. This pressure switch isnormally connected to ground. Whenthe pressure becomes lower thanthe desired level, the pressure switchopens, notifying VIMS that thereis low pressure in the rear brakeaccumulator system.”

474 F AXLE OILTEMP

Front Axle OilTemperature

49 PWM “The temperature of the oil withinthe front axle. VIMS receives asignal that changes in pulse widthas the front axle oil temperaturechanges. VIMS then determines thetemperature from the pulse widththat is received.”

475 R AXLE OILTEMP

Rear Axle OilTemperature

49 PWM “The temperature of the oil withinthe rear axle. VIMS receives asignal that changes in pulse widthas the rear axle oil temperaturechanges. VIMS then determines thetemperature from the pulse widththat is received.”

476 PARKBK CABSW

Parking BrakeCab Switch

81 Switch “The status of the switch in the cabthat is used to engage or disengagethe parking brake. The switch iseither in the parking brake engagedposition (OPEN) or the parking brakedisengaged position (CLOSED).”

477 BRK ACUMPRES

BrakeAccumulatorPressure

49 Switch “The brake accumulator pressure.This pressure switch is normallyclosed to ground. When the pressurebecomes lower than the desiredlevel, the switch opens notifyingVIMS that there is low pressure inthe brake accumulator system.”

478 RT TRL BRKTEMP

Right TrailerBrake (Oil)Temperture

49 PWM “The oil temperature within theright trailer brake. The temperaturesensor sends to VIMS a pulse thatvaries in width as the temperaturechanges. VIMS then calculates thetemperature according to the pulsewidth that is received.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


479 LT TRL BRKTEMP

Left TrailerBrake (Oil)Temperature

49 PWM “The oil temperature within theleft trailer brake. The temperaturesensor sends to VIMS an pulse thatvaries in width as the temperaturechanges. VIMS then calculates thetemperature according to the pulsewidth that is received.”

480 TRLBRKC INTEMP

Trailer BrakeCooler (Oil) InletTemperature

49 PWM “The trailer brake oil temperature onthe inlet side of the trailer brake oilcooler. VIMS receives a signal thatchanges in pulse width as the coolerinlet oil temperature changes. VIMSthen determines the temperaturefrom the pulse width that it receives.”

481 TRLBRKC OUTTEMP

Trailer BrakeCooler(Oil) OutletTemperature

49 PWM “The trailer brake oil temperatureon the outlet side of the trailerbrake oil cooler. VIMS receives asignal that changes in pulse widthas the cooler outlet oil temperaturechanges. VIMS then determines thetemperature from the pulse widththat is received.”

482 TRL FLTR Trailer FilterPlug

49 Switch “The status of the trailer brake oilfilter. The switch will open in the caseof a plugged filter.”

483 TRL BRKSTROKE

Trailer BrakeStroke

49 Switch “This is a switch(s) that tells VIMSif the trailer brake master oil linepressure is to low, or if one ofthe trailer brake master cylinders(There can be more than one brakestroke switch, in which case theywould be wired in a series circuit)has overstroked. If one of theseconditions are met VIMS would benotified that there is a problem withat least one of the master trailerbrake cylinders.”

484 STRG TEMP SW Steering OilTemperatureSwitch

49 Switch “The steering oil temperature status.If the temperature gets above apredetermined level, the switchwill open to indicate steering oiltemperature is too high. ”

485 ENG OIL FLTR Engine OilFilter DifferentialPressure

36 Switch “The pressure drop across theengine oil filter. When the pressureacross the filter is greater thanthe specified pressure, the switchplunger moves and allows the switchcontacts to open telling VIMS thatthe filter is PLUGGED. With normaloperation, the switch contacts areclosed and the circuit is grounded.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


488 STG COOL FLTR SteeringCooling FilterStatus

49 Switch “The status of the steering coolingfilter (OK or PLUGGED). When thepressure across the filter is greaterthan the specified pressure, theswitch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, the switchcontacts are closed and the circuitis grounded.”

490 STRG RTN FLTR Steering Returnto Tank FilterStatus

49 Switch “The status of the steering return totank filter (OK or PLUGGED). Whenthe pressure across the filter isgreater than the specified pressure,the switch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, the switchcontacts are closed and the circuitis grounded.”

491 LT STRG CDRN Left SteeringCase DrainPumpTemperature

49 PWM “The temperature of the oil withinthe left steering case drain pump.VIMS receives a signal that changesin pulse width as the left steeringcase drain pump temperaturechanges. VIMS then determines thetemperature from the pulse widththat is received.”

492 RT STRG CDRN Right SteeringCase DrainPumpTemperature

49 PWM “The temperature of the rightsteering case drain oil.”

493 PARKBK FLTR Parking BrakeOil Filter Status

116 Switch “The status of the parking brake oilfilter. When the pressure across thefilter is greater than the specifiedpressure, the switch plunger movesand allows the switch contacts toopen telling VIMS that the filter isPLUGGED. With normal operation,the switch contacts are closed andthe circuit is grounded.”

494 LT STRG CDRN Left SteeringCase Drain OilFilter Status

49 Switch “The status of the oil filter on theleft steering case drain (OK orPLUGGED). When the pressureacross the filter is greater thanthe specified pressure, the switchplunger moves and allows the switchcontacts to open telling VIMS thatthe filter is PLUGGED. With normaloperation, the switch contacts areclosed and the circuit is grounded.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


495 RT STRG CDRN Right SteeringCase Drain OilFilter Status

49 Switch “The status of the oil filter on theright steering case drain (OK orPLUGGED). When the pressureacross the filter is greater thanthe specified pressure, the switchplunger moves and allows the switchcontacts to open telling VIMS thatthe filter is PLUGGED. With normaloperation, the switch contacts areclosed and the circuit is grounded.”

498 F HI PRES FLTR Front HighPressure Filter

49 Switch “The status of the front implementhigh pressure hydraulic oil filter.When the pressure across the filter isgreater than the specified pressure,the switch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, the switchcontacts are closed and the circuitis grounded.”

499 R HI PRES FLTR Rear HighPressure Switch

49 Switch “The status of the rear implementhigh pressure hydraulic oil filter.When the pressure across the filter isgreater than the specified pressure,the switch plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is PLUGGED.With normal operation, the switchcontacts are closed and the circuitis grounded.”

500 HYD OIL TEMP Hydraulic OilTemperature

36/49 PWM “The hydraulic oil temperature. AnECM receives a signal that changesin pulse width as the hydraulic oiltemperature changes. The ECM thendetermines the temperature from thepulse width that is received.”

501 PMP IN VALVE Pump InletValve

49 Switch “These switches are attached to theinlet suction line for each hydraulicoil pump. They are located at thehydraulic oil tank. When the pumpinlet valve is open, meaning that oilcan flow, the switch is closed, andthe circuit is grounded. There couldbe multiple switches wired in serieson one particular machine, afterwhich a switch(s) opens (meaning nooil flow), the ECM would know thereis no oil flow in one or more circuits.”

502 HYD OIL LVL Hydraulic OilLevel

49 Switch “The status of the hydraulic oil level(LO or OK). With low hydraulic oillevel, the switch will open. In normaloperation, the switch is closed toground.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


503 CDRN FLTR Case DrainFilter

49 Switch “The status of the case drain filter(PLUGGED or OK). As the casedrain filter becomes PLUGGED,mechanically the machine causesthe oil filter to be bypassed. Whenthis filter is bypassed, the flow ofoil in the bypass route opens aswitch that tells VIMS that the filteris plugged. In normal operation theswitch is closed to ground.”

504 HI PRES FLTR High PressureFilter

49 Switch “This is a result obtained from upto eight high pressure filters. Thesehigh pressure filters are wired in aseries circuit to ground. If any one ofthe filters becomes PLUGGED, thecorresponding switch (circuit) opens,indicating that at least one of thehigh pressure filters is PLUGGED.”

505 HOIST SCREEN Hoist Screen 49 Switch “The status of the hoist screen(PLUGGED or OK). As a hoistscreen becomes PLUGGED,mechanically the machine causesthe hoist screen to be bypassed.When the bypass occurs, the flowof oil in the bypass route opens aswitch that tells VIMS that the hoistscreen needs to be replaced orcleaned. In normal operation theswitch is closed to ground.”

506 HYD RTN FLTR HydraulicReturn Filter

49 Switch “This is the status of the hydraulic oilreturn line filter (PLUGGED or OK).As the hydraulic oil return line filterbecomes PLUGGED, mechanicallythe machine causes the hydraulicoil return line filter to be bypassed.When this bypass occurs, the flowof oil in the bypass route opensa switch that tells VIMS that thehydraulic oil return filter needs to bereplaced or cleaned.”

511 HYD SYS PRES HydraulicSystemPressure

49 Switch “The present pressure of thehydraulic system.”

513 DIFF OIL LVL Differential OilLevel

49 Switch “The status of the differential oil level(LO or OK). With low oil level theswitch will open. In normal operationthe switch is closed to ground.”

515 HYD OIL LVL Hydraulic OilLevel

49 Switch “The status of the hydraulic oil level(LO or OK). With low oil level, theswitch will open. In normal operation,the switch is closed to ground.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


516 HYD OIL TEMP Hydraulic OilTemperature

36/49 PWM “The hydraulic oil temperature. AnECM receives a signal that changesin pulse width as the hydraulic oiltemperature changes. The ECM thendetermines the temperature from thepulse width that is received.”

517 HYD OIL FLTR Hydraulic OilFilter

49 Switch “The status of the hydraulic oilfilter (PLUGGED or OK). When thepressure across the filter is greaterthan the specified pressure, theswitches plunger moves and allowsthe switch contacts to open tellingVIMS that the filter is plugged.With normal operation, the switchcontacts are closed and the circuitis grounded. Cold oils often causea known filter restriction, so VIMSignores warnings (open switch)when oil temperature is below about125 degrees F.”

518 HYD PILOTPRES

Hydraulic OilPilot Pressure

49 PWM “The oil pressure in the hydraulicpilot oil line. The machine ECMreceives a signal that changes inpulse width as the hydraulic pilotoil pressure changes. The machineECM then determines the pressurefrom the pulse width that is received.”

519 ENG FANBYPASS

Engine FanBypass

36/49 Calculated “Used to read and override thebypass valve position of theengine cooling fan. Override isaccomplished through a PC that isrunning the Electronic Techniciansoftware only.”

520 ENG FAN SPD Engine FanSpeed

36/49 Frequency “The speed of the engine coolingfan shaft. The sensor mounted onthe engine fan shaft generates ansignal that varies in frequency as thecooling fan shaft varies in speed.An ECM, after receiving this signaldetermines the speed of the enginecooling fan.”

521 HYD FAN SPD Hydraulic FanSpeed

36/49 Frequency “The speed of the hydraulic oilcooling fan shaft. The sensormounted on the hydraulic oil coolingfan shaft generates an signal thatvaries in frequency. An ECM, afterreceiving this frequency signalthen determines the speed of thehydraulic oil cooling fan.”

524 DIFF FAN Differential Fan 30 Calculated “The status of the fan that is usedto cool the differential axle oil (ONor OFF). This value is received fromthe Caterpillar Monitoring Systemover the CAT Data Link. ”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


525 HYD FANBYPASS

Hydraulic FanBypass

36/49 Calculated “Used to read and override thebypass valve position of the coolingfan for the hydraulic oil. Override isaccomplished through a PC that isrunning the Electronic Techniciansoftware only.”

550 SYS AIR PRES System AirPressure

49 PWM “This is a measure of the airpressure in the main supply line forthe machine. The sensor sends toVIMS a pulse that varies in width asthe pressure changes. VIMS thencalculates the pressure according tothe signal that is received.”

555 HYD LOOP FLTR Hydraulic CircuitFilter Status

49 Switch “Used to read the status of thehydraulic circuit filter (OK orPLUGGED).”

574 LFT LVR POS Lift LeverPosition

82 PWM “A percentage value that representsthe position of the bucket hydrauliclift lever within the cab (within thefull calibrated range of the lever).This should be a value from 0% to100%. An ECM receives this signalthat changes in pulse width as thelift lever position changes. The ECMthen calculates the lift lever positionfrom the pulse width that it receives.”

576 LFT RAISE SOL1 Lift RaiseSolenoidNumber 1

82 Solenoid “The status of the number one pilotlift-raise solenoid that is used tocontrol the lift cylinders. The twostates for this solenoid are ON orOFF.”

705 ATMOS PRES R AtmosphericPressure RearEngine

34 Analog “The atmospheric (barometric)pressure on the outside of themachine. The atmospheric pressuresensor sends to the engine ECM avoltage that varies as the pressurechanges. The engine ECM thencalculates the pressure according tothe voltage that is received.”

706 HOIST RO PRES Hoist Rod EndPressure

87 PWM “The oil pressure on the rod end ofthe hydraulic tilt cylinder. An ECMreceives a square wave signal fromthe sensor that changes in frequencyas the hydraulic tilt cylinder rod endoil pressure changes. The ECM thencalculates the pressure from thefrequency that is received.”

707 HOIST HD PRES Hoist Head EndPressure

87 PWM “The oil pressure on the head endof the hydraulic tilt cylinder. An ECMreceives a square wave signal fromthe sensor that changes in frequencyas the hydraulic tilt cylinder headend oil pressure changes. The ECMthen calculates the pressure fromthe frequency that is received.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


708 BODY ANGLE Body PositionSensor

87 PWM “The angle that represents the bodyposition. The angle is measured inreference from the down position (onthe rail).”

710 RTF-LTF SUSPCYL

Right FrontMinus Left FrontSuspensionCylinder

49 Calculated “This is calculated by VIMS bysubtracting the left front suspensioncylinder pressure from the right frontsuspension cylinder pressure.”

711 RTR-LTR SUSPCYL

Right RearMinus Left RearSuspensionCylinder

49 Calculated “This is calculated by VIMS bysubtracting the left rear suspensioncylinder pressure from the right rearsuspension cylinder pressure.”

712 HOIST SCREEN Hoist ScreenBypass

87 Switch “The status of the hydraulic hoistscreen filter (PLUGGED or OK).”

720 LTF SUSP CYL Left FrontSuspensionCylinder

49 Frequency “The left front suspension cylinderpressure. VIMS receives a squarewave signal from the sensor thatchanges in frequency in respect tothe change in the cylinder pressure.VIMS then calculates the pressure inthe cylinder from the frequency thatis received.”

721 LTR SUSP CYL Left RearSuspensionCylinder

49 Frequency “The left rear suspension cylinderpressure. VIMS receives a squarewave signal from the sensor thatchanges in frequency in respect tothe change in the cylinder pressure.VIMS then calculates the pressure inthe cylinder from the frequency thatis received.”

722 RTF SUSP CYL Right FrontSuspensionCylinder

49 Frequency “The right front suspension cylinderpressure. VIMS receives a squarewave signal from the sensor thatchanges in frequency in respect tothe change in the cylinder pressure.VIMS then calculates the pressure inthe cylinder from the frequency thatis received.”

723 RTR SUSP CYL Right RearSuspensionCylinder

49 Frequency “The right rear suspension cylinderpressure. VIMS receives a squarewave signal from the sensor thatchanges in frequency in respect tothe change in the cylinder pressure.VIMS then determines the pressurein the cylinder from the frequencythat is received.”

724 BODY ANGLE Body PositionAngle

27 PWM “Used to read the angle of the bodyposition. The angle is measured inreference from the down position (onthe rail).”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


725 GND SPD Ground Speed 27/81 Frequency “The speed of the machine relativeto the ground. The sensor sends asignal to the transmission ECM thatvaries in frequency depending onthe transmission output shaft speed.Then based on the frequency thatthe transmission ECM receives, theground speed is determined.”

726 BODY POS Body Position 27 Switch “The position of the body (up ordown). One use of this sensor(switch) is to tell the transmissionECM what the body position is sothat ground speed can be limitedwith the body up.”

727 BODY LVR Body Lever 27 Switch “The status of the body raise/lowerlever within the cab. The state of thebody lever is up, down or float.”

728 PAYLOAD Payload 49 Calculated “The payload is calculated by VIMSbased on pressures of the foursuspension cylinders. The payloadcan change throughout a cycle, butthe payload value returns to zeroat the end of the payload cyclewhen the body raise/lower routineis performed (dumping of the load)(OHT).”

729 PAYLOADSTATUS

Payload Status 49 Calculated “The status of the truck in a payloadcycle. Examples of payload statusare stopped empty, stopped loading,traveling loaded, dumping, travelingempty, etc. ”

730 HAUL DISTANCE Haul Distance 49 Calculated “The distance that has been traveledby the truck up to a present pointin a payload cycle. Haul distance iscalculated based on ground speedand travel time.”

731 RT TRL SUSPCYL

Right TrailerSuspensionCylinderPressure

59 Frequency “The oil pressure within the righttrailer suspension cylinder. VIMSreceives a square wave signal fromthe sensor that changes in frequencyas the right trailer suspensioncylinder pressure changes. VIMSthen determines the pressure in thecylinder from the frequency that isreceived from the sensor.”

732 LT TRL SUSPCYL

Left TrailerSuspensionCylinderPressure

59 Frequency “The oil pressure at the left trailersuspension cylinder. VIMS receivesa square wave signal from the sensorthat changes in frequency as the lefttrailer suspension cylinder pressurechanges. VIMS then determines thepressure in the cylinder from thefrequency that is received from thesensor.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


733 TRL DOOR POS Trailer DoorPosition

59 PWM “The status of the trailer door(open or closed) (the door on thebottom of the trailer that is used fordumping). VIMS receives a signalthat changes in pulse width as thetrailer door position changes. VIMSthen determines the position fromthe pulse width that is received.”

734 TLT CYLHDPRES

Tilt CylinderHead Pressure

49 Frequency “The oil pressure on the head endof the bucket tilt cylinder. An ECMreceives a square wave signal fromthe sensor that changes in frequencyin respect to the change in thecylinder pressure. The ECM thendetermines the pressure within thecylinder from the frequency that itreceives from the sensor. Negativepressures will not be displayed.”

737 GND SPD Ground Speed 81 Calculated “Used to read the machine groundspeed with directional indication. Thesigned data indicates the direction oftravel: Negative is in reverse.”

742 USER SHUTDN User Shutdown 36 Switch “This tells the status of the usershutdown input. There are twostates, on and off. When in theshutdown (ON) position (resultingfrom grounding this input) the engineECM stops the engine.”

743 SHUTDN SW ShutdownSwitch

36 Switch “The status of the machine remoteshutdown switch. To activate thisswitch the red guard on the machinemust be lifted and the switch in theon position. The engine ECM readsthe switch, and after one secondfuel injection will be stopped if theengine is running, or the engine willnot be allowed to start if not running.Once the switch has been on, thekey start switch must be turnedoff momentarily and then back onbefore the engine ECM will allow theengine to run again.”

747 SWG HIPRESFLTR

Swing HighPressure Filter

49 Switch “The status (PLUGGED or OK) ofthe swing high pressure hydraulic oilfilter.”

749 AUTO LUBEPRES

Auto LubePressure

49 PWM The pressure in the lubrication linethat feeds grease to the greaseinjectors of the lubrication system.The sensor that measures thepressure sends a pulse to VIMS thatvaries in width depending on the linepressure. VIMS then uses this signal(large wheel loaders) to calculatethe lube pressure.

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


751 AUTO LUBE Auto Lube(Status)

49 Calculated “This is the operating status ofthe auto lube solenoid. There areseveral possible states. They areactive, pending, warning, inactive,and terminate .”

752 ENG FAN PMPPRES

Engine FanPump Pressure

36 Analog “The oil pressure in the hydraulicoil line to the engine cooling fanhydraulic motor. The engine ECMreceives a signal that changes involtage as the engine fan pump oilpressure changes. The engine ECMthen determines the pressure fromthe voltage that is received.”

754 SYS VOLTAGE System Voltage 49 Calculated “The actual voltage that existsbetween the positive side of theelectrical system and frame ground.”

755 BUCKET WT Bucket Weight 49 Calculated “The weight of the loader bucketpayload. The lift cylinder pressureand lift arm position are used tocalculate this value.”

759 HYD OIL PRES Hydraulic OilPressure

49 PWM “The oil pressure in the outlet line ofthe hydraulic oil pump. The sensorthat measures this pressure sendsa pulse width varying signal to anECM depending on the hydraulic oilpump outlet line pressure. The ECMthen uses this signal to calculate thehydraulic oil pressure.”

778 ETHER INJECTSW

Ether InjectionSwitch

36 Switch “The position of the ether injectionswitch in the cab. This is the switchwhich the operator uses to manuallyinject ether for starting. The switch iseither OFF or ON (manual injection).”

779 AESC AutomaticEngine SpeedControl

36 Switch “The status of the AESC pressureswitch. If the engine ECM receivesan signal from AESC pressureswitch notifying that the hydraulicsare being used, then no action istaken. But, if the hydraulics are notbeing used, the engine ECM idlesthe engine down to a specified speedto save fuel and reduce engine wear.As soon as the hydraulics begin tobe used again, the engine speed isagain elevated. AESC state is eitherON or OFF.”

780 START RELAY Start Relay 51 Switch “The status of the start relay. Whenthe engine is cranking, the start relayis engaged.”

781 KEY START SW Key Start Switch 51 Switch “The status of the key start switch.The status is either ON, OFF orCRANK.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


782 AESC ENABLSW

AutomaticEngine SpeedControl EnableSwitch

36/49 Switch “The status (ACTIVE or INACTIVE)of the Engine Seed ControlAutomatic Enable switch.”

783 AESC CTRLLINE

AutomaticEngine SpeedControl Line

36/39 Switch “The status of the AESC output linefrom the engine ECM.”

785 PAYLOAD SW Payload Switch 39 Switch “The status of the payload storeswitch. The switch is normally inthe open position. When the switchis pressed, a grounded signal isreceived, telling VIMS to store thepayload data that has been collectedsince the last store and to clear thepresent payload data. The switch iseither ON or OFF.”

786 HOIST OVERCTR

Hoist Overcenter

87 Calculated “The status of the hoist overrunningload control. This indicates when theECM is trying to control the body soan overrunning load will not damagethe machine.”

787 HOIST POS CC Hoist LeverPosition fromChassis Control

87 Analog “Used to read the hoist lever modeand the mode drive commandpercentage. The drive percentage,used by the RAISE, FLOAT, andLOWER modes, indicates theposition of the lever within the rangeof travel for the particular mode.”

788 HOIST STATUSCC

Hoist Statusfrom ChassisControl

87 Analog “Used to read the actual hoistoutput status and drive commandpercentage. The drive percentage,used by the RAISE, FLOAT, LOWERand SNUB modes, indicates theposition of the lever within the rangeof travel for the particular mode. ”

790 ATMOS PRES AtmosphericPressure

36 Analog “The atmospheric (barometric)pressure on the outside of themachine. The atmospheric pressuresensor sends to the engine ECM avoltage that varies as the pressurechanges. The engine ECM thencalculates the pressure according tothe voltage that is received.”

791 AMB AIR TEMP‘

Ambient AirTemperature

49 PWM “The temperature of the air outsidethe machine. VIMS receives a signalthat changes in pulse width as theoutside or ambient air temperaturechanges. VIMS then uses the pulsewidth that it receives to determinethe ambient air temperature.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


792 MACHINE PITCH Machine Pitch 49 Calculated “This is calculated from the fourmachine suspension cylinderpressures. VIMS takes the sum ofthe two front suspension cylinderpressures minus the sum of the tworear suspension cylinder pressures.”

793 MACHINE RACK Machine Rack 49 Calculated “This is calculated from the fourmachine suspension cylinderpressures. VIMS takes the sum ofthe two diagonal suspension cylinderpressures (left front plus right rearor right front plus left rear) minusthe sum of the two other diagonalsuspension cylinder pressures.”

794 ATMOS PRES F EngineAtmosphericPressure Front

33 Analog “The air pressure at the inlet to theintake manifold of the front engine.(see parameter 790)”

795 REEL LUBE SW Reel LubeSwitch

49 Switch “The status of the reel lube switch(ON or OFF). The reel lube switchwill turn the lubrication system on toactuate the manual lube reel.This isan alternate lubrication system fromthe auto lube system. This systemoverrides the auto lube system.While this switch is on, the auto lubestatus will be pending.”

799 HOIST STATUS Desired HoistStatus

27 Calculated “The desired mode and drivepercentage of the hoist for operation.The drive percentage, used by theRAISE, FLOAT, and LOWER modes,indicates the desired lever positionwithin the range of travel for theparticular mode.”

800 VIMS EVENTLIST

VIMS Event List 49 Calculated “This is a percentage value thatrepresents the amount of memoryspace (out of the total) that is left forthe VIMS Event List.”

801 PAYLOAD DATA Payload Data 49 Calculated “This is a percentage value thatrepresents the amount of memoryspace (out of the total) that is leftfor storing of payload data. This iscalculated by VIMS on off highwaytrucks.”

802 VIMSSNAPSHOT

VIMS Snapshot 49 Calculated “This is a percentage value thatrepresents the amount of memoryspace (out of the total) that is left forstoring of the VIMS Snapshot data(previously named event recorderdata). This value will either be 100,50, or 0 percent. Every time ansnapshot is activated (manually orautomatically), the VIMS snapshotvalue should be reduced by 50percent. This value can only be resetby downloading the VIMS snapshotdata.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


803 PAYLOADMEMORY

PayloadMemory

49 Calculated “This is a percentage value thatrepresents the amount of memoryspace (out of the total) that is leftfor storing of payload data. This iscalculated by VIMS on large wheelloaders.”

804 PWR SHIFTPRES

Power ShiftPressure

36 PWM “The power shift pressure that isused to control the swash plates onthe hydraulic oil pumps. The engineECM receives a signal that changesin pulse width as the power shiftpressure changes. The engine ECMthen, using the pulse width that itreceives, determines the power shiftpressure.”

805 VIDS EVENTLIST

VIDS Event List 49 Calculated “This is a percentage value thatrepresents the amount of memoryspace (out of the total) that is left forthe VIDS Event List data.”

806 PWR SHIFT Power Shift 36 Calculated “The current as a percentage ofmaximum which is being deliveredto the power shift solenoid.”

850 MAX PITCH/SEC Maximum PitchPer Second

49 Calculated “Used with Chassis electroniccontrole module.”

851 MAX RACK/SEC Maximum RackPer Second

49 Calculated “Used with Chassis electronic controlmodule.”

852 CURRENT FELA Current FELA 49 Calculated “Used with Chassis electronic controlmodule.”

853 MOV AVG1 FELA Moving AverageNumber 1 FELA


854 MOV AVG2 FELA Moving AverageNumber 2 FELA


855 MOV AVG 3FELA

Moving AverageNumber 3 FELA


856 RUN AVG FELA RunningAverage FELA


857 CUM FELA UPD CumulativeFELA Update


860 MANUAL EREC Manual EventRecorder

49 Switch “The status of the manual eventrecorder (OFF or RECORDING).”

862 CUR R FELA Current RearFELA


863 MOV AVG1 RFELA

Moving AverageNumber 1 RearFELA


864 MOV AVG3 RFELA



(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


865 MOV AVG5 RFELA



866 RUN AVG RFELA

RunningAverage RearFELA


876 EXH TEMP DEVLTF

ExhaustTemperatureDeviation LeftFront

49 Calculated “The difference between left frontexhaust and the three remaningexhaust banks.”

877 EXH TEMP DEVLTR

ExhaustTemperatureDeviation LeftRear

49 Calculated “The difference between left rearexhaust and the three remaningexhaust banks.”

878 EXH TEMP DEVRTF

ExhaustTemperatureDeviation RightFront

49 calculated “The difference between right frontexhaust and the three remaningexhaust banks.”

879 EXH TEMP DEVRTR

ExhaustTemperatureDeviation RightRear

49 Calculated “The difference between right rearexhaust and the three remaningexhaust banks.”

900 LOADING TIME Loading Time 49 Calculated “The total time that the machine hasspent loading in a given payloadcycle.”

901 STOP EMPTYTIME

Stopped EmptyTime

49 Calculated “The total time that the machine hasbeen stopped while empty in a givenpayload cycle.”

902 TRVL EMPTYTIME

Travel EmptyTime

49 Calculated “The total time that the machine hasbeen traveling while empty in a givenpayload cycle.”

903 STOP LOADEDTIME

Stop LoadedTime

49 Calculated “The total time that the machinehas been stopped while loaded in agiven payload cycle.”

904 TRVL LOADEDTIME

Travel LoadedTime

49 Calculated “The total amount of time that amachine has been traveling whileloaded in a given payload cycle.”

905 THROTTL LCKSPD

Throttle LockSpeed

36 Calculated “The speed that the operator hasset as the throttle lock speed withthe throttle lock set switch. This isonly valid if the throttle lock ON/OFFswitch is in the on position.”

907 LOW OIL PRES Low OilPressure

36 Switch “Notifies VIMS of low engine oilpressure. With low pressure, theswitch would be open to ground.In normal operation, the switch isclosed to ground.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


910 LT FNL DRVCHIP

Left Final DriveChip DetectorLevel

49 Switch “This switch notifies VIMS if chipshave been detected in the left finaldrive. As metal chips collect on themagnetic contacts of the switch,a short circuit is made from oneterminal to the other causing a closedcircuit to ground. During normaloperation, the switch is in the openposition. The switch is consideredclosed when the resistance betweenthe two switch terminals is betweenzero and approximately 2K ohms. ”

912 RT FNL DR CHIP Right Final DriveChip DetectorLevel

49 Switch “This switch notifies VIMS if chipshave been detected in the rightfinal drive. As metal chips collecton the magnetic contacts of theswitch, a short circuit is made fromone terminal to the other causinga closed circuit to ground. Duringnormal operation, the switch isin the open position. The switchis considered closed when theresistance between the two switchterminals is between zero andapproximately 2K ohms. ”

913 LT FNL DRVTEMP

Left Final DriveOil Temperature

49 PWM “The temperature in the left finaldrive.”

914 RT FNL DRVTEMP

Right Final DriveTemperature

49 PWM The temperature in the right finaldrive.

7107 INJ DISABLD Engine InjectionDisalbled

36 Calculated “The engine status parameter ismonitored to see if the injectors havebeen disabled.”

7108 OIL PRES FSHTDN

Oil PressureFront ShutdownStatus

33 Calculated “This parameter senses if the frontengine has been shutdown dueto low oil pressure. The engineECM will turn off the Rear Low OilPressure status immediatly whenthe rear engine is shutdown. Thisparameter looks for a change ofstate in the low oil pressure statusfrom LO to OK and injection disabledfrom OFF to ON.”

7109 TRN OIL PRESLO

TransmissionOil PressureLow

116 Calculated “Monoitors the low region of thetransmission oil pressure. ”

7110 TRN OIL PRESHI

TransmissionOil PressureHigh

116 Calculated “Monitors the region of hightransmission oil pressure.”

(continued)


(Table 11, contd)


ParameterNumber

VIMSAbbreviated

Name

VIMSFull

NameSource


7112 OIL PRES RSHUTDN

Oil PressureRear ShutdownStatus

34 Calculated “This parameter senses if the rearengine has been shutdown dueto low oil pressure. The engineECM will turn off the Rear Low OilPressure status immediatly whenthe rear engine is shutdown. Thisparameter looks for a change ofstate in the low oil pressure statusfrom LO to OK and injection disabledfrom OFF to ON.”

7701 RETRDR LVR Retarder LeverPosition

116 PWM “Reads the position of the autoretarder lever. This signal is apercentage of full travel.”

7738 AUTO RETRDRSW

AutomaticRetarderPressure SwitchStatus

116 Switch “Shows the state of the ARCpressure switch. The ARC pressureis either HI or LO.”

i01712719

Glossary of TermsSMCS Code: 7601

Abuse – A machine or a engine is operated in away that could possibly damage the machine.

Abnormal – The condition of a machine system isnot normal or a signal of a machine system is notwithin expected limits. An abnormal condition or aabnormal signal means that a problem exists. Theoperator should be notified with a warning when anabnormal condition exists.

Absolute Pressure (PSIA) – The pressure ismeasured with respect to the atmospheric pressure.Atmospheric pressure is approximately 101 kPa(14.7 psi). See Gauge Pressure.

Active – This pertains to the status of a fault orto the status of a service code. When the fault isactive, the fault is currently present.

Active Fault – This is a type of diagnosticmaintenance event. The maintenance eventidentifies a specific failure in an electronic controlsystem. This condition is better described as anactive data event or an active maintenance event.See Event and Fault.

Active Sensor – The sensor is externally powered.The sensor must have at least three lead wires. SeePassive Sensor.

Advanced Diesel Engine Management (ADEM) –This electronic engine control is used by Caterpillargas engines and diesel engines.

Air Gap – This is the distance between a gear toothand the tip of a magnetic pickup. This is also thedistance between the rotor and the stator of analternator or a generator.

Alert Indicator – This is the red indicator lamp thatis located in the display area. The lamp flasheswhen a problem exists. The associated warningindicator pictograph or the VIMS message centermodule identify the abnormal condition of a machinesystem. This is part of the operator warning system.The indicator typically means that the machineneeds attention. However, the machine is able tocontinue operation. The abnormal condition mustbe checked in accordance with the machine’sOperation and Maintenance Manual.

Alternator – This is a electromechanical device thatconverts rotating mechanical energy into electricalenergy in the form of alternating current.

Alternating Current (AC) – This is a flow of currentthat flows in both directions. This process repeatscontinuously. The number of such cycles persecond is called the frequency.

American Wire Gauge (AWG) – This is a measure ofthe diameter of electrical wire. As the AWG numberbecomes smaller, the wire diameter becomes larger.Thicker wires handle more current.

Ampere “I” – The standard unit of measure forcurrent flow in a circuit.


Analog Display – A type of readout that showsinformation with a needle that sweeps across a dialface. See Digital Display.

Analog Sensor Power Supply – This is a powersource in a Caterpillar electronic control system,that powers analog sensors. The power source isusually rated at 5 DCV.

Analog Signal – This is a signal voltage from ananalog sensor. The signal varies smoothly overtime. The variations are caused by the changingconditions that are sensed.

Analog Sensor – This is a device that generates aDC signal between +0.2 and 4.8 Volts. The sensorsignal is proportional to the mechanical system thatis being monitored. Analog sensors are most oftenused with electronic engine controls. See DigitalSensor.

ARC – See Automatic Retarder Control.

Atmospheric Pressure Sensor – This is a devicethat generates a signal that is proportional toatmospheric pressure. This is usually an analogsensor.

Automatic Braking System (ABS) – An electroniccontrol system for controlling brakes in slipperyunderfoot conditions.

Automatic Electronic Traction Aid (AETA) – This isan electronic control system for Off Highway Trucks.The system reduces the wheel slip that is causedby poor underfoot conditions.

Automatic Retarder Control (ARC) – This is anelectronic control that monitors the engine speed.The control automatically applies the retarder ondownhill slopes. This is done in order to reduce thepossibility of an engine overspeed.

Base Sample Rate – This is the fastest availablesample rate that is available for configuring asnapshot recorder or other stored data. See SampleRate.

Battery – This is a device that stores electricalenergy. The typical battery that is used in Caterpillarelectrical systems is the 12 Volt lead acid. Thebatteries are used to start the engine. Each batteryis made up of six cells.

+Battery – This is the voltage that is found on allwiring harnesses that connect to the positive batterypost of the electrical system. The +Battery voltageis also known as the system voltage.

-Battery – This term is sometimes used to designatethe chassis ground or the negative side of thebattery. See Ground.

Battery Backed Up RAM (BBR or BBRam) – Thisis the Random Access Memory (RAM) that iscontained in an electronic control that is protectedby an internal battery. The data that is held in theRandom Access Memory will be lost if the externalpower is disconnected without the internal battery.See Volatile Memory.

Breakout T-Harness – This is a test harness thatconnects into a machine harness or a engineharness. The breakout T-harness connector cableallows the normal operation of the system. Thecable also provides a connector that allows thehookup of test equipment.

Broadcast – This is a process that transfers datafrom a mobile unit (machine or vehicle) to astationary location. This transfer is usually wireless.See Telemetry. This term also describes the DataLink communication between electronic controls.One control automatically sends a message to othercontrols on the Data Link.

Bypass Circuit – This is a circuit that temporarilyreplaces the existing circuit during a test.

Calibration – This is the adjustment of an electricalsignal that is related to a mechanical linkage ora component. For example, the small differencesthat occur between the output of the atmosphericpressure sensor and the boost pressure sensor canbe corrected by calibration.

CAT Data Link (CDL) – The CAT data link is anelectrical connection for communication withonboard devices that use the Data Link (ECM, CMS,VIMS, electronic power train, electronic dashboardsand service tools such as Caterpillar ElectronicTechnician). The CAT data link is also the mediumthat is used for programming with Caterpillar servicetools and for troubleshooting with Caterpillar servicetools.

Category 1 Warning – This is a red alert indicatorthat flashes in order to warn the operator that aCategory 1 Warning condition exists. The indicatoralso indicates the failed machine system. TheCategory 1 condition needs attention by the endof the shift.


Category 2 Warning – This is a red alert indicatorthat flashes in order to warn the operator that aCategory 2 condition exists. The indicator alsoindicates the failed machine system. The actionlamp also flashes in order to indicate Category2 warning. The presence of this category usuallyindicates that the operator must alter the operationof the machine or that the service technician mustperform maintenance. This warning most oftenrelates to a system temperature that is too high.

Category 2S Warning – This is a special versionof the standard Category 2 warning that includesa CONTINUOUS action alarm. The action alarmis used in order to get the operator’s attention insituations that may be normally overlooked.

Category 3 Warning – This is a red alert indicatorthat flashes in order to warn the operator that aCategory 3 condition exists. The indicator alsoindicates the failed machine system. The actionlamp also flashes in order to indicate a Category3 warning. The action alarm sounds ON and OFF.This warns the operator to safely shut down themachine. There is an exception to this warning.When the parking brake is turned ON and thetransmission is in gear.

Caterpillar Electronic Technician (ET) – This is aWindows based program, that is used to serviceCaterpillar products. The software operates on aservice tool (personal computer).

CDL – See CAT Data Link.

CD-ROM – See Compact Disk Read Only Memory.

CE Connector – This is a multipin connector witha hard shell. This connector is made by Deutschfor use in the Caterpillar Environment (CE). Thecontacts of the connector are serviceable. Thecontacts are interchangeable with the contactsof the VE Connector. The locking ring is a quickdisconnect.

Central Processing Unit (CPU) – This is thehardware that makes up the part of a computersystem that actually processes data.

Channel – This describes an input to an electroniccontrol. This may also be a frequency that is usedfor a voice transmission and/or the transmission ofdata.

CID – See Component Identifier.

Circuit – This is a path for the continuous flow ofelectrical current. The current will flow from a powersource through various conductors and back tothe source.

Clear – This is the removal of diagnostic informationthat is stored in the memory of an electronic control.Before clearing a failure, the failure must be onhold and the failure must not be present. This hasthe same meaning as Reset. Clear is the preferredterm. See Reset.

Communication Adapter – This is a device thatallows the service tool to communicate with anelectronic control over the CAT Data Link and theATA Data Link. The communication adapter convertsthe CAT Data Link Communications and the ATAData Link communications to RS-232and vice versa.

Compact Disc-Read Only Memory (CD-ROM) –This is Read Only Memory. The data is storedon a compact disk. This memory is used bytheCaterpillarService Information System and theCaterpillarElectronic Technician.

Component Identifier (CID) – This is a diagnosticcode that identifies a component or a system that isfaulty. This is a four digit diagnostic code. The codeis sometimes preceded by a Cor CID.

Conductor – This is any material that can carry anelectrical current. An example of a conductor wouldbe a wire in a wiring harness.

Configuration Software – This is the information thatis provided for use by the on board system. Thisinformation contains specific characteristics of themachine.

Connector – This is a device that is usuallyconstructed of two pieces that mate. A connectorprovides a way to easily disconnect circuits orseparate circuits. Connectors are also used forhydraulic circuits or pneumatic circuits.

Connector Contact – This is a component of aharness connector that actually makes the electricalconnection. Connector contacts can be either pins(male) or sockets (female).

Continuity – This is one property of a completeelectrical circuit. The correct resistance depends onthe circuit that is being tested.

Control – See Electronic Control.

Coolant Temperature Sensor (CTS) – This is adevice that generates a signal that is proportionalto the engine coolant temperature.

Cumulatives – This term is sometimes referred toas “Cums”. “Cums” relate to data that is stored onboard the machine. This information consists oftotals such as total engine revolutions, total distancetravelled or total fuel burned. The Cumulativescan be used to schedule maintenance prior to aexpected failure.


Current – This is the flow of electrons in a circuit.Current is measured in Amperes. The standardsymbol for current is the letter “I”.

Data Event – This is an abnormal machine orengine condition. These conditions can affect themachine or the engine life.

Data Link – This is a circuit that is used for digitalcommunications. The communications occurbetween electronic controls or the communicationsoccur between electronic controls and a servicetool.

Deadband – This is a range of input signal valuesthat are specified so the output of a control willremain constant.

Decibel (dB) – This is approximately the smallestchange in sound volume that can be detected bythe human ear.

Default – This is the initial value of a parameterprior to programming by the customer. This is alsothe value of the parameter after the system hasbeen reset.

Derate – This is the operation of the system at asetting that is below a desired limit.

Detected Fault – See System Event and DiagnosticCode.

Diagnostic – This is a process that takes placewithin an electronic control. The control senses theabnormal machine information. The control displaysthe abnormal machine information. The controlstores the abnormal machine information. Thisstored information can aid the service technician.

Diagnostic Clock – This is a clock within anelectronic control. The clock increments time onlywhen +Battery is connected to the control byturning the key start switch to the ON position. Thistime is known as diagnostic hours. This time willalways be MORE than engine running time or thetrue Service Meter Hours. See Diagnostic Hours.

Diagnostic Code – This is a code that is generatedfrom a diagnostic type of maintenance event.This code relates to an abnormal condition in anelectrical system that has been detected by anelectronic control. See Service Code.

Diagnostic Connector – This is a service connector.This is normally a CE connector that contains 20sockets. The connector brings the test points thatare required in testing the starting and chargingcircuits to a common point. This permits testingwith either a multimeter or dedicated 6V-2150Starting/Charging Analyzer. A Deutsch connectorwith 12 contacts is used on products that useonly one starter. On products that use twin starterapplications, a second Deutsch connector with 8contacts is necessary.

Diagnostic Event – This is a type of maintenanceevent. This event is displayed when an electroniccontrol detects an abnormal condition in theelectrical system. Sometimes abnormal conditionsin the mechanical system can be detected throughthe electrical system.

Diagnostic Event Code – See Event and DiagnosticCode.

Diagnostic Fault Code – See Diagnostic Code.

Digital Display – This is a type of readout thatshows information in the digital format (numbersand letters). See Analog Display.

Digital Power Supply – This is a power source thatpowers digital sensors in a control system. This isusually 8 Volts DC power supply.

Digital Sensor – This is a device that generates anoutput signal that oscillates between two differentvoltage levels. Either the frequency of the signalor the duty cycle of the signal changes in order tocarry the sensed information. The digital sensor canbe powered by voltages that are between 8 and28 DCV. The voltage that is used depends on thesensor. See Analog Sensor.

Digital Voltmeter (DVM) – This is a voltmeter with adigital display.

Direct Current (DC) – This is flow of electrons(current) in a closed circuit, that moves in only onedirection through a conductor.

Disconnect Switch – This is a battery disconnectswitch that is connected between the battery’snegative terminal and frame ground (chassis). Thisswitch is most often a keyswitch. This switch maybe controlled electronically on some machines. Theswitch is used in order to disconnect the electricalsystem from the machine for service. The switchis used when a machine is placed in storage forperiods longer than one month.

Display – A gauge, indicator, and digital readout.The display is used to view the status of a machine.


Disk Operating System (DOS) – This is the softwarethat contains the internal operating instructions forthe computer. This software also allows the manualinput of commands by the operator of the computer. All computer systems have some type of operatingsystem in order to function.

Download – The process of moving or transferringstored information from an electronic control toan off-board system such as a service tool. SeeUpload.

Driver – This is the electrical circuit that powers anoutput of an electronic control. The driver turns onlamps, solenoids, relays, etc.

Duty Cycle (DC) – This is the ratio of ON time to thetotal time of a digital signal. An example of dutycycle of 50 percent is a signal that is ON for onesecond and OFF for one second. See Pulse WidthModulation.

Electrically Erasable Programmable Read OnlyMemory (EEPROM) – This is a version of EPROMthat can be programmed. Sometimes, an electroniccontrol can WRITE to this memory. See ErasableProgrammable Read Only Memory.

Electromagnet – This is a temporary magnet thatconsists of a coil of wire that is wrapped around aniron core. The assembly becomes a magnet onlywhen a magnetic field is produced by an electriccurrent passing through the coil. Relays work onthis principle.

Electromagnetic Interference (EMI) – This is theresponse of an electronic component or system toelectromagnetic radiation. The interference usuallycauses a reduction of performance.

Electronic Control Analyzer Programmer (ECAP) –This is computer based service tool that isdedicated to programming and diagnosing a varietyof electronic controls. The service tool uses theCommunications Adapter in order to communicatethrough the CAT Data Link or the ATA Data Links(SAE J1708/1587).

Electronic Control Module (ECM) – This is anelectronic control. The control monitors machinesystems. The control also outputs commands todrive components. The term was formerly used tospecifically describe an electronic engine control.

Electromagnetic Pickup – This is a permanentmagnet that is wrapped with many turns of smallwire that becomes a pickup coil. The pickup coilwill generate an electrical pulse whenever a geartooth passes the tip of the magnet. Because thistype of sensor is self-generating, the sensor doesnot require power.

Electronic Programmable Transmission Control II(EPTC II) – This is the second generation of theElectronic Programmable Transmission Control thatincludes advanced diagnostics.

Electronic Unit Injector (EUI) – This is anelectro-mechanical fuel injector. The pump, themetering and the injection elements are containedin a single unit. The pump is mechanically actuatedand the fuel discharge is electronically controlled.

Electrostatic Discharge (ESD) – This is the releaseof electrical energy that is caused by the buildup ofstatic between two components.

Elevation – The height above sea level.

Engine Speed/Timing Sensor – This is a device thatgenerates a signal that is based on the crankshaft’s: position, speed, and direction of rotation.

Erasable Programmable Read Only Memory(EPROM) – This is a type of computer memory thatrequires special equipment in order to erase storeddata. After the device is programmed and theninstalled the computer can only READ the softwareprogram. See Electrically Erasable ProgrammableRead Only Memory.

Error – This is a type of operator warning thatresults from a system event (VIMS). See SystemEvent.

ET – See Caterpillar Electronic Technician.

Event – This is a detected failure. The failure maybe caused by a sensor that is out of range or anabnormal condition. Events are separated into twobasic categories DATA events and MAINTENANCEevents. A stored event has a fixed duration (startand end time). An active event is present at the timeof troubleshooting. This event has not yet endedso the event has no duration. The conditions thatdefine this event will determine if the event will bestored and/or displayed.

Event Category Indicator (ECI) – This is adesignation that shows the event warning category.This is a direct indication of the severity of theevent. An example of the indicators are listed here:1, 2, 2S and 3

Event Count – This is the number of occurrencesfor a particular event since the last reset of the onboard data. See Occurrence Count which is thepreferred term.

Event Duration – This is the recorded duration ofan event that was active.


Event Recorder – This is a six minute recording thatwas first used with the Vital Information ManagementSystem. This term is now referred to as a snapshotrecorder. See Snapshot Recorder.

Failure – This is a malfunction of a component or anincorrect calibration of an electronic control system.This condition can occur during normal operationof the engine or machine and AFTER a period ofknown correct operation. Failures are detected byan electronic control when a signal does not existor a signal is outside a valid range. Failures usuallycause diagnostic information to be stored. However,not all maintenance information represents a failure.A failure is often referred to as a fault. This is anincorrect use of the term. See Fault, Event andDiagnostic Event.

Failure Mode Identifier (FMI) – This is a portion ofthe total diagnostic code. The FMI identifies a typeof failure that is detected by an electronic control.The FMI is a two digit code. The code describesthe failure mode of the component that is describedby the Component Identifier. A Component Identifier(CID) is always displayed in conjunction with theFMI.

Fault – This is a pre-existing defect in a componentor a system. The fault is identified at the initialassembly or at the time of purchase. See Failure.An example of a fault is a PWM sensor that will notfunction at the time of initial installation.

Flash Files – These Software programs containinstructions on the operation of electronic controls.The programs are transferred from the off-boardservice tool to any on board electronic control. SeeFlash Programming.

Flash Memory – This is solid state memory thatis used in electronic controls. The memory canbe reprogrammed with an off-board service toolthrough a data link without being removed fromthe control. Other types of memory can only beprogrammed outside of the control.

Flash Programming – This is a means ofprogramming, reprogramming or updating(uploading) an electronic control with an off-boardservice tool instead of replacing the control orpersonality module. This process involves thetransfer of configuration software from the servicetool to the electronic control. Communication is doneover a data link. See Flash Memory and Uploading.

Floating – This describes the end of a circuit thatis open. The circuit is not connected to any othercomponent.

Frame Stress Analyzer – This is an attachmentto the Vital Information Management System. Thesystem measures the stress on Off-Highway Truckframes and structures. The measurement relatesto the condition of the haul roads. This system isactually a monitor of the condition of the haul road.

Fuse – This is a replaceable safety device for anelectrical circuit.

Gage – See Gauge.

Gauge – This is a type of display device. Thegauge is usually a circular shape with a indicatorneedle. The gauge can be a mechanical deviceor a solid state device.

Gauge Pressure (PSIG) – This is the pressure thatis measured with respect to atmospheric pressure.See Absolute Pressure.

Ground (B-) – This is the reference point for theelectrical system. On CAT products, ground is themachine frame or the engine. This is the connectionpoint for the negative side of the battery.

Grounded Circuit – This is the connection point ofany electrical circuit to the machine frame, engineor any part of the machine. This is considered to bethe ground reference point for the electrical system.This connection can be either wanted or unwanted(fault).

Ground Level Shutdown – This is a remote means ofshutting down the engine without turning off the keyswitch. This lever can usually be reached from theground without entering the operator’s station (cab).

Hall Effect Speed Sensor (HESS) – This is an activesensor for sensing the speed of slow moving gearsor targets. This sensor uses a silicon chip that iscalled a Hall Cell to sense a moving target.

Hardware (H/W) – This is the electrical componentsand electronic components that make up anelectrical system.

Hard Wired – These permanent connections aremade within the wiring harness. These soldered orcrimped connections are not meant to be altered.

Harness – This is an assembly or bundle of twoor more wires that electrically connect systemcomponents. The harness is usually held togetherby a loom.


Harness Code – This refers to the groundedcondition or open condition of the harnesscode inputs. The harness code provides thecharacteristics of the machine such as engineoil pressure, maximum engine speed, etc. Thiscode is usually model specific. The VIMS usesthis hard wired code in order to determine themodule identifier (MID) that is used for data linkcommunications.

Hertz (Hz) – This is a measure of frequency. Theunits are cycles per second.

Histogram – This is a bar graph that shows thenumber of occurrences for a given range.

Hysteresis – This is a measure of the lag time thatoccurs between the turn ON and turn OFF valuesof a switch or a sensor. An example would be theEUI oil pressure warning lamp may turn on at 40 psiwith decreasing pressure and turn off at 45 psi withincreasing pressure. The hysteresis is 5 psi.

I – This is the standard symbol for current. The unitof measure is the Ampere.

Icon – This is a symbol that is used instead of wordsin order to convey a message in any language.

Indicator – This is a lamp, gauge, etc. Theindicator calls attention to service related conditionsregarding a machine.

Information System Builder (ISB) – This is a softwaretool that is used to generate configurations for theVital Information Management System. The softwarecan also modify existing configuration software.The software can also be used in order to view theitems that are listed here: parameters and limits ofthe parameters. The software can also be used tochange the customer values in the Large WheelLoader Payload portion of the configuration.

Input/Output (I/O) – This describes the electroniccircuits within an electronic control that are used forinputs (such as sensors and switches) to the controland the outputs from the control to the externalcircuits (such as horns, lamps and solenoids).

Instrument Data Link – This is a four-wire Data Link.The Data Link is used with the display modules thatare used in monitoring systems.

Interface Module – This is an electronic control thatcollects information from sensors. The control thensends the results to another electronic control overa data link. The control can also energize outputdevices such as solenoids.

Jumper – This is a piece of wire that is used tomake a temporary electrical connection duringtroubleshooting.

Keypad – This is a panel of keys that is similar tothe one that is used on a telephone. The keypadis used as an interface to the on board electricalsystem.

Key Start Switch – This is a key actuated,automotive type, engine cranking/starting switchincluding functions such as the ON (relay), CRANKand, sometimes, ACCESSORY.

Kilopascal (kPa) – This is a Metric unit of pressure.The force that is applied to one square meter is oneNewton (6.89 kPa (1.000 psi)).

kPa – See Kilopascal.

Lamp – This is a component of the machineelectrical system that emits light by convertingelectrical energy into light.

Large Hydraulic Excavator (LHEX) – This is amachine that is usually propelled on tracks. Themachine uses hydraulic power to travel. Themachine uses hydraulic power to dig up materialwith a bucket.

Large Wheel Loader (LWL) – This is a machine onwheels that moves material with a bucket.

Latitude – The location of the machine in referenceto the equator. Positive numbers represents locationnorth of the equator. Negative numbers representlocations south of the equator.

Light Emitting Diode (LED) – This is a solid statedevice. The device emits light that is visible to thehuman eye when an electrical current is passedthrough the device. the LED is used as a lampin electronic controls because the device is veryreliable.

Liquid Crystal Display (LCD) – this is a type ofsolid state display that uses a liquid crystallinematerial that is sealed between two glass sheets.An electrical signal causes segments of the crystalmaterial to be visible to the eye.

Load – This is a device that is connected to theelectrical system. The load consumes power or theload dissipates power.

Log (Logged) – This is the process of savinginformation (stored or recorded) within an electroniccontrol. See Store.

Longitude – The location of the machine inreference to the prime meridian. Positive numbersare East of the Prime Meridian. Negative Numbersare West of the Prime Meridian.

LWL – See Large Wheel Loader.


MAC-14 – This is a multipurpose electronic controlthat contains 14 solenoid driver outputs.

Machine Event – This is an event that describes anabnormal MACHINE condition in the VIMS. Machineevents relate to any system except the events thatdeal with the electrical system. This term is nowreferred to as a Data Event. See Event,System Eventand Operational Event.

Machine Service Connector – This is a harnessconnector for the machine or engine electricalsystems that allow the connection of a service tool.

Message Center Module – This is a VIMS modulethat contains the main display for the operatorwarning system. This module also displaysinformation for the service technician.

Module – This is a shortened term that is usedin place of the electronic control module. Seeelectronic control module.

Module Identifier (MID) – This is a three digitnumber that identifies an electronic control.

Non-Volatile Memory (NVM) – This is a type of datastorage that is not lost after an interruption of power.See Volatile Memory.

Normal Condition – Normal describes the contactposition of a switch or relay. This is the conditionwhen the component is not controlled by theapplication of the conditions that are listedhere:force, temperature, pressure, and electricity.This is usually the condition that is found when thecomponent is installed on a machine. This conditioncan be different when the component has beenremoved from the machine prior to testing. TheElectrical System Schematic shows the condition ofthe components as the component is installed ona machine. Normal also describes the status of amachine system.

Occurrence Count – This is the number ofoccurrences for a particular eventsince the lastreset of the on board data. This is the preferredterm. See Event Countand Event.

Off-Board – This refers to hardware and softwarethat is located off the machine. The hardware andsoftware can be temporarily connected to theelectrical system.

Off Highway Truck (OHT) – This is a hauling unit thatis used primarily for off road mining applications.

Ohm – This is the standard unit for measuringresistance. This is represented by the letter R.

On Board – This refers to hardware and softwarethat is located on the machine as part of theelectrical system.

Open Circuit – This is a condition that exists whenan electrical circuit is broken.

Parameter – This is a value or a limit thatis sometimes programmable. The parameterdetermines the characteristics or behavior of theengine and/or machine electrical system. SeeProtected Parameter. A parameter can also refer tothe gauge functions and/or the monitored channelsof information (Vital Information ManagementSystem).

Parameter Identifier (PID) – This is a code that isassigned to each packet of digital information. Thiscode is shared between controls over the CAT DataLink and the American Trucking Association (ATA).Data Link.

Passive Sensor – This is a sensor that does notrequire external power in order to operate. SeeActive Sensor.

Password – This is a group of numeric charactersor alpha-numeric characters that restrict the accessto information in a control system. A password isused with the Caterpillar Common Service softwarein order to restrict access to off-board data. Apassword is required by Caterpillar electronicservice tools in order to change information.

Personality Module – This is a small module(hardware) or software that is inserted into theengine control which contains all the instructions(software) and performance maps for the enginewithin a specific horsepower family.

Plug – This is the male end of a connector. Theplug makes an electrical connection to a circuit byinserting into a receptacle.

Polled Data – This is data that is requested byan electronic control. The data is not brought inautomatically.

Potentiometer (Pot) – This is a variable resistorthat has three terminals. The potentiometer can beeasily adjusted by using a knob or a screwdriver.

Pounds per square inch (psi) – This is an Englishunit of pressure measurement. The measurementrepresents the force that is applied to one squareinch. The value is measured in pounds. 6.89 kPa(1 psi)

Pressure Sensor – This is a device that generatesa signal that is proportional to the pressure that issensed.


Pressure Switch – This is a device that sensespressure. The pressure causes the switch contactsto open or the pressure causes the switch contactsto close. This signal can be used by an electroniccontrol. The signal can also be used with asignalling device such as a lamp.

Problem – This is an abnormal condition with amachine or engine.

Pull up Voltage – This is the voltage that ismeasured on the input of an electronic control whenthe input device has been disconnected. (sensor,switch, etc.)

Pulse Width Modulation (PWM) – This is a signalthat is made up of a string of pulses that vary inwidth. The time on versus time off varies accordingto the system that is being sensed. The frequencyof the signal (repetition rate) of the pulses and theheight of the signal (amplitude) remain constant.

Quad Gauge Module – This is an display modulethat contains four analog gauges.

Radio Frequency (RF) – Frequencies that arebetween about 150 kHz and infrared (invisible light).This range of frequencies are capable of carryingdata via radio telemetry systems.

Random Access Memory (RAM) – This is a typeof computer memory that is usually volatile. Thismemory is used for the temporary storage of data.

Read Only Memory (ROM) – This is a type ofcomputer memory that is programmed during themanufacturing process. The memory cannot bereprogrammed later. See Erasable ProgrammableRead Only Memory.

Real Time – This term is used to describe therelationship of information (events) that is based ona true clock 24 hours represents one day.

Real Time Clock (RTC) – This is the method that isused by electronic controls to measure time. Thetime is based upon true clock hours. See DiagnosticClock, Service Meter Hours and Service Meter Units.

Receptacle – This is a female component of theconnector that makes an electrical connection to acircuit. The receptacle will receive a plug assembly.

Rectifier – This is an electrical device that convertsalternating current into pulsating dc current.

Relay – This is an electromechanical device. Therelay uses an electromagnet in order to actuatethe electrical contacts. The contacts switch largecurrents with a relatively small amount of controlcurrent to the electromagnet.

Reset – This is a command that restores memoryto a default state. The default state is usually zero.This means that all of the data has been removedor erased. See Clear.

Resistor – This is an electrical component. Theresistor is usually made of resistance wire or ofcarbon that has a resistance. Resistance opposesthe flow of current.

Rheostat – This is a variable resistor. The rheostat isusually a two terminal version of the potentiometer.The rheostat is often used in applications thatrequire a higher dissipation of power than apotentiometer.

RS-232 Data Link – This is a serial data link thattransfers data between electronic devices such asa personal computer and a printer. See Serial DataLink.

Sample Rate – This is the rate or frequency thatdata is captured and/or stored. This is usuallymeasured in samples per second.

Scroll – This is the process of showing all availablesets of event informationwithin a digital display area.The information is shown one set at a time. A setof event information is shown briefly. The displaywill automatically advance to the next set. After allthe sets are shown the process is repeated. Somecontrols will show the message END before thecontrol repeats the process.

Sender – This is a device that changes resistanceaccording to a physical condition. The sender thensends a signal to a gauge. A single connectionprovides the signal and the power.

Sensor – This is a device that monitors the physicalcondition of a machine system. The sensors canmonitor the conditions that are listed here: pressure,temperature, flow, and mechanical movement. Thesensors convert the condition into an electricalsignal that can be understood by an electroniccontrol. Also see Transducer and Sender.

Serial Data Link – This is a type of data link thattransfers one bit of data at a time. The data link ismost often used to transfer information betweencomputer devices.

Service Code – This is a type of maintenance codethat describes a condition that has been identifiedby an electronic control system. The code indicateswhen service is required. This code is stored in thecontrol for the service technician. This term waspreviously referred to as a fault code. This code isnow referred to as a service type of maintenanceevent. See Event and Diagnostic Code.


Service Event – This is a type of maintenance eventthat requires a service technician to perform service.This is usually routine service that is performed onthe machine. Examples of service are changing theengine oil or transmission filters. See Event.

Service Hour Meter (SHM) – This is a meter on themachine that totals the hours the engine has ran.

Service Meter Hours (SMH) – This meter incrementstime only when the engine is running. This meter ismost often used in order to determine the intervalsfor servicing the machine. This meter is also usedto identify the time of occurrence of an event. Thisis used as part of the diagnostic process. Also seeService Meter Units.

Service Program Code (SPC) – These codesare entered into the electrical system by theuser through the keypad. The codes initiate therequested operation.

Service Tool – This is a tool that is used in order toservice Caterpillar machines. This term most oftenrefers to the service equipment that is listed here:Electronic Control Analyzer Programmer (ECAP),Caterpillar Electronic Technician (ET), a digitalmultimeter, and laptop computer This may also referto any other dedicated service equipment.

Service Tool Connector – See Machine ServiceConnector.

Short Circuit – A connection between two points ina circuit that is normally unwanted.

Signal – This is the changing voltage that is usedto carry information. A signal is typically sent froma sensor to an electronic control. For example, asignal is sent from the transmission output speedsensor (TOS) to the transmission control.

Signal Wire – This is the harness wire that carriesthe signal voltage to the electronic control. Thesignal is sent by any of the components that arelisted here: a sensor, a switch, and any other similarcomponents.

Snapshot Recorder – This is a set of machineinformation that is captured and stored for later useby the service technician. The snapshot is similar toa picture of information. The picture often containsmultiple channels over a given time period. Thiswas formerly called an event recorder in the VitalInformation Management System. The snapshotrecorder that is used by the Vital InformationManagement System records data for six minutes.This six minute period contains five minutes ofinformation before the event started and one moreminute after.

Software (S/W) – This is a step-by-step instructionthat defines the operation of a computer system.This is often called a program.

Solenoid – This is a coil assembly that is usedto perform some type of mechanical work.The solenoid converts electrical energy intolinear mechanical motion with an electrical coil(electromagnet) that produces a magnetic fieldaround an armature (slug or plunger).

Solenoid Valve – This is a device that uses asolenoid in order to actuate a valve (hydraulic orpneumatic). The valve is used to control the flow orpressure of a liquid or gas.

Solid State – This refers to circuits or componentsthat use semiconductors. Examples of solid statedevices: transistors, diodes, and integrated circuits(IC).

Source Software – This is software that containsdetailed operating instruction for the on boardsystem. This is software that is similar to theoperating system that is used with a personalcomputer.

Sourcing Driver – This is a type of output of anelectronic control. When the driver (output) ison +Battery is supplied to the load. The otherconnection must be connected to ground. This issometimes referred to as a high side driver.

Speed Burp – This is a sudden unwanted changein engine speed.

Speedometer/Tachometer Module – This is a displaymodule that contains the components that are listedhere: speedometer for machine ground speed, atachometer for engine speed, and a display foractual gear.

Store – This is the process that is used to record theevent information in an electronic control. See Log.

Subsystem – This is a system that is part of a largersystem.

Supply Voltage – This is a constant voltage that issupplied to a component such as a sensor. Thesupply voltage provides the electrical power for theoperation of the component. The voltage may begenerated by the electronic control or supplied fromthe machine electrical system.

Sure-Seal Connector – This is a multi-contactconnector that holds pins and sockets in a rubberhousing.


Suspension Cylinder Pressure Sensor – This is adevice that generates a signal that is proportionalto suspension cylinder pressure. This sensor is adigital type. The signal changes frequency as thepressure changes.

Switch – This is a device with electrical contactsthat opens under specified conditions. This is adevice with electrical contacts that closes underspecified conditions.

Switch Input – This is the input to an electroniccontrol that is expecting to be a ground, a openor +Battery.

System Clock – This is a device within a machine orengine electrical system, usually in the monitoringsystem if present, that synchronizes or forces theclock within each electronic control module on adata link to display the same machine or enginehours. The primary use of this clock is for timestamping of events used for service, maintenanceand/or warranty, etc.

System Event – This is an abnormal condition inthe ELECTRICAL SYSTEM that has been detectedby an electronic control in the Vital InformationManagement System (VIMS). This term is nowcalled a diagnostic type of maintenance event. SeeEvent and Diagnostic Code.

System Voltage – This is the actual voltage thatexists between the positive battery post and frameground. This is sometimes referred to as +Batteryvoltage.

Temperature Sensor – This is a device thatgenerates a signal that is proportional to the changein temperature.

Temperature Switch – This is a switch that monitorstemperature. The switch sends a signal to anelectronic control or signal lamp.

Telemetry – This is a wireless method ofbroadcasting data between two points. This methodmost often uses a radio. The mobile unit transfersthe data to the data collection area.

Test Probe – This is a device for connecting aservice tool in order to test a circuit. The probeprovides access to a circuit that is being tested.The probes provide access to the circuit withoutdisconnecting the circuit.

Trend – This is a type of graph that shows thechanges of a parameter value over time.

Trigger point – This is the starting point in theprocess of storing a snapshot. This is also thebeginning of an event.

Uncommitted Switch Input – This is a switch inputfor an electronic control. The function variesaccording to the application. A harness codeor programmable software is most often used todetermine the function of these inputs.

Undetected Fault – This is a system event thatcannot be detected by the electronic control. Thefault must be detected by the operator or a servicetechnician.

Upload – This is the process of transferring aprogram and/or configuration into an electroniccontrol from an off-board service tool. See FlashProgramming and Download.

+V – This is a constant voltage that is supplied toa component that provides electrical power for theoperation of the component. The voltage is providedby an electronic control module. The voltage isalways less than +Battery.

VIMS-PC – This is a Windows based off-boardsoftware. The software is used with a service tool.The service tool communicates with the VIMSthrough the RS-232data link.

Vital Information Display System (VIDS) – This is anelectronic monitoring system that is based on theVital Information Management System. However, theVIDS has reduced features.

Vital Information Management System (VIMS) –This is a system that is designed to monitor all onboard systems for abnormal conditions. The VIMScontrols the operator’s electronic instrument panelvia a special data link.

Volatile Memory (VM) – This is a type of datastorage that is lost with a interruption of power.

Warning Category – This describes the severity ofan operator warning. This is based on one of threecategories.

Wiring Harness – See Harness.

Wring Out – Wring out refers to checking a harnessfor opens, shorts or grounds.

Zener Diode – This is a special diode that conductscurrent in the reverse direction when this reversevoltage becomes higher than a specified value.When this specified value is reached, the voltageacross this diode remains constant.

110Index Section

Index

A

Action Alarm .......................................................... 55Action Lamp........................................................... 55Arrow Keys ............................................................ 47

C

Component Descriptions ....................................... 34

D

Data Connectors.................................................... 54Data Logger - Reset .............................................. 11Data Logger - Start/Stop ....................................... 12Display Backlighting - Set ...................................... 12Display Contrast - Set............................................ 12Display Language - Set ......................................... 13Display Modules .................................................... 38Display Units - Set ................................................. 13

E

Event - Configure................................................... 13Event Acknowledged - Show ................................. 15Event List - Show................................................... 15Event Statistics - Show.......................................... 16

F

Function Keys........................................................ 48“F1” Key ............................................................ 48“F2” Key ............................................................ 49“F3” Key ............................................................ 49

G

Gauge Key............................................................. 47General Information................................................. 4

Related Support Material ..................................... 8Global Positioning System..................................... 10

Events ................................................................ 10Hardware and Software Requirements.............. 10Snapshot............................................................ 10Truck Payload System........................................ 10

Glossary of Terms ................................................. 99

I

ID Key .................................................................... 48Important Safety Information ................................... 2

K

Keypad................................................................... 46

L

Lubrication Interval - Set ....................................... 16Lubrication Manual - Start ..................................... 17

M

Machine Location - Show ...................................... 17Machine Status - Show.......................................... 17Message Center Module ....................................... 40

Message Center Abbreviations.......................... 40

N

Normal Operation .................................................... 9Numeric Keys ........................................................ 49

O

Odometer - Set ...................................................... 18OK Key .................................................................. 46

P

Parameters ............................................................ 58Payload Lamps...................................................... 56

Q

Quad Gauge Module ............................................. 39

R

Related Components............................................. 57Diode Assemblies .............................................. 57Service Keyswitch.............................................. 57Solenoids ........................................................... 57

Resettable Totals - Reset ...................................... 19Resettable Totals - Show....................................... 20Road Analysis Control Sensitivity - Set ................. 19

S

Sensors ................................................................. 51Frequency Sensors ............................................ 51Pulse Width Modulated Sensors (PWM)............ 52

111Index Section

Service Lamp ........................................................ 56Service Lamp - Reset............................................ 21Service Lamp - Set................................................ 21Service Operations................................................ 10Snapshot Trigger - Configure ................................ 24Speedometer/Tachometer Module ........................ 39Switches ................................................................ 49

Coolant Flow Switch .......................................... 51Filter Indicator Switches..................................... 50Oil Level Switch.................................................. 49Steering Flow Switches...................................... 50Steering Pressure Switch .................................. 51

System Self Test.................................................... 26Systems Operation Section ..................................... 4

T

Table of Contents..................................................... 3Truck Payload - Calibrate....................................... 27Truck Payload - Configure ..................................... 28Truck Payload System (TPS) General Information.. 32

Automatic Calibration Adjustment...................... 33Collapsed Suspension Cylinder Detection......... 33

V

VIMS Electronic Control Module............................ 34VIMS Snapshot - Start........................................... 29

W

Warning Operation ................................................ 30

renr2630-01-01-all

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