the new jetta steering and suspension
TRANSCRIPT
Self-Study ProgramCourse Number 861403
The new JettaSteering and Suspension
Volkswagen of America, Inc.Volkswagen AcademyPrinted in U.S.A.Printed 12/2004Course Number 861403
©2004 Volkswagen of America, Inc.
All rights reserved. All information containedin this manual is based on the latestinformation available at the time of printingand is subject to the copyright and otherintellectual property rights of Volkswagen ofAmerica, Inc., its affiliated companies and itslicensors. All rights are reserved to makechanges at any time without notice. No partof this document may be reproduced,stored in a retrieval system, or transmitted inany form or by any means, electronic,mechanical, photocopying, recording orotherwise, nor may these materials bemodified or reposted to other sites withoutthe prior expressed written permission ofthe publisher.
All requests for permission to copy andredistribute information should be referredto Volkswagen of America, Inc.
Always check Technical Bulletins and the latestelectronic repair information for informationthat may supersede any information includedin this booklet.
Trademarks: All brand names and productnames used in this manual are trade names,service marks, trademarks, or registeredtrademarks; and are the property of theirrespective owners.
i
Table of Contents
Important/Note!
New!
This Self-Study Program covers the steering and suspensionsystem of the new Jetta!
This Self-Study Program is not a Repair Manual. Thisinformation will not be updated.
For testing, adjustment and repair procedures, always referto the latest electronic service information.
Introduction ................................................................................1Course Introduction, Steering and Suspension
Front Axle ....................................................................................4Front Axle, Half Shafts
Rear Axle ................................................................................... 10Rear Axle
Steering .....................................................................................13Steering System, Electro-Mechanical Power Steering,Steering Wheels, Steering Column
Brake System ............................................................................19Brake System, Brake Caliper Assemblies, Anti-Lock BrakingSystem ABS/ESP, Brake Pressure Sensor 1 G201, OptimizedHydraulic Brake Servo (OHBS), ESP and CANCommunication, Handbrake
Pedal Assemblies ......................................................................29Pedal Assemblies, Clutch Position Sensor G476, AcceleratorPedal Position Sensors G79 and G185
Service.......................................................................................34Axle Geometry, Special Tools
1
Introduction
Course Introduction
Volkswagen has set the standard in theautomobile industry for steering andsuspension technology by enhancing thedesign of the new Jetta. Best in classsteering and suspension componentsinclude: optimized front axle strutsuspension, multi-link rear suspension, newelectro-mechanical power steering and thelatest generation of ESP and brake assistsystems. All were developed to provide anunmatched driving experience.
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2
Introduction
Steering and Suspension
The electro-mechanical power steeringsystem of the new Jetta supports thevehicle's improved driving characteristics bytransmitting a precise steering feel thatvaries the amount of assist with the speedof the vehicle.
• Optimized McPherson strutsuspension axle based on thedesign
• Direct anti-roll bar connectionwith a 1:1 ratio
• Electro-mechanical powersteering
• Dual rate brake servo
• Brake assist system
• Electronic StabilizationProgram (ESP) based onContinental Teves MK 60
The suspension system of the new Jettahas been optimized through the installationof a suspension strut axle and a new four-link rear axle. This redesigned systemprovides unsurpassed driving comfort anddynamics.
3
Introduction
• Floor mounted accelerator pedalwith accelerator pedal positionsensors
• Four-link rear suspension
• Tire pressure monitoringsystem
• Track and camber onrear axle can beadjusted separately
• New wheel designs
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4
Front Axle
Front Axle
The new Jetta is equipped with aMcPherson strut front suspension with adouble wishbone design. This designoptimizes comfort while maintainingstability.
Wheel BearingS321_007
Wishbone Suspension
Suspension StrutAnti-Roll Bar
Subframe
Wheel BearingHousing
CasterAdjustment
CamberBalancing
Toe Adjustment
5
Front Axle
Subframe
The subframe includes three aluminumcomponents that are joined to the body atsix points. This design results in a morerugged front suspension. The bondedrubber bushings in the wishbones andsuspension strut mountings enhancedriving dynamics and noise dampeningqualities.
ControlArm
Wheel Bearing Assembly
Compact wheel bearing assemblies consistof a wheel hub and bearing that areattached to the strut pivot from the insidewith four bolts.
This design eliminates the need for bearingadjustments.
S321_020
S321_022
Key:
= Bonding Point to Body
SubframeControlArm
Wheel BearingAssembly
6
Front Axle
Suspension Strut
The suspension strut consists of a coilspring and a polyurethane dampener. Thehigh tensile steel coil spring is bent inwardat both ends. The polyurethane dampenerprogressively dampens suspension travel.
Upper Strut Mount
The upper strut mount is a bonded rubberbushing that separates the spring andshock absorber from the body. Thisdampening force is then absorbed by thevehicle chassis. This design eliminatespretension in the dampener mount,resulting in a smoother ride with less roadnoise.
The mount provides soft dampening in thedirection of suspension travel and a morerigid dampening of lateral forces.
Coil Spring
S321_039
S321_041
PolyurethaneDampener
Upper StrutMount
7
Front Axle
Swivel Mount
The swivel mount is connected to thesuspension strut by a clamp and attached tothe wishbone by a guide joint.
The wheel bearing assembly is attached toeither a bolted or integrated swivel mount,depending on the suspension design.
S321_043
S321_021
WishboneSuspension
Subframe
SuspensionStrut Swivel Mount
Clamp
BoltedConnections
WheelBearing
BrakeCarrier
BrakeCaliper
GuideJoint
Wishbone Assembly
The wishbone assembly connects thesubframe and the swivel mount.
Bolted Swivel Mount
8
Front Axle
Anti-Roll Bar
S321_134
Bonded RubberBushing
BearingMovementAbsorbed
Anti-Roll Bar
The tubular anti-roll bar is connected to thesuspension strut through a coupling rod in a1:1 ratio.
This design increases the degree of anti-rollby using the same bar diameter.
S321_045
CouplingRod
The anti-roll bar is mounted on thesubframe by two bonded rubber bushingsthat prevent movement with the anti-rollbar.
Instead of turning within the rubberbushing, the rotational movements of theanti-roll bar are absorbed by the mounts.
Strut
BondedRubberBushings
Subframe
Anti-Roll Bar
9
Front Axle
Half Shafts
The new Jetta uses short and long driveshafts. The shorter shaft on the left-handside is solid, whereas the longer shaft onthe right is of a hollow tubular construction.
On vehicles with higher powered engines,the shafts are the same length. This isachieved by using an intermediate shaftattached to the crankcase. This designeliminates pulling to one side (torque steer)during vehicle acceleration.
Left-HandHalf Shaft
S321_049
S321_048S321_046
IntermediateShaft
Intermediate ShaftRight-HandHalf Shaft
10
Rear Axle
Rear Axle
The rear axle suspension of the new Jettais a compact four-link design. Each sideconsists of three suspension links: lowerlink, track rod and upper link, and a trailingarm. This design greatly enhances stabilityand ride.
This suspension develops a slightundersteer during cornering. By altering thewheel position slightly, a self-steeringresponse or toe-in steering is achieved.
UpperLink
S321_171
BearingBracket
Steel Spring
Anti-Roll Bar
Subframe
Track Rod
Lower Link
Trailing Arm
Dampener
Toe Adjustment
CamberAdjustment
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11
Rear Axle
S321_027
Wheel Carrier
S321_029
StubAxle
WheelBearing
Torque toYield Bolt
Subframe
The subframe is a welded steelconstruction assembly and is bolted directlyto the body.
Wheel Carrier
The wheel carrier is a forged steelassembly with a molded stub axle to mountthe wheel bearing.
Wheel Bearing and Hub Assembly
The wheel hub and wheel bearing form anassembly. The wheel bearing is connectedto the stub axle of the wheel carrier by atorque to yield bolt, which achieves thenecessary bearing preload but does notexceed it.
12
Rear Axle
Four-Link Suspension
Separate longitudinal and lateralconnections were added for the four-linksuspension of the new Jetta. Theadvantage of this suspension is that itenhances the Jetta’s handlingcharacteristics without sacrificing itscomfortable ride.
The trailing arm is no longer subjected tolateral forces such as those caused bycracks and grooves in the road surface. Thefour-link suspension absorbs these forces,allowing the vehicle to better maintain itsstability.
The following illustration shows the forcedistribution of the double wishbonesuspension of the previous Jetta.
S321_190
Lateral ForceLowerWishbone
UpperWishbone
Trailing Arm
LongitudinalForce
S321_018
LongitudinalForce
Trailing Arm
Lateral Force
Track Rod
Bottom Link
Top Link
13
Steering
Steering System
The electro-mechanical power steeringsystem of the new Jetta enhances thevehicle’s driving response by maintainingthe driver’s precise feel of the road. Asspeed changes, steering assist adapts.Road surface factors such as bumps andgrooves in the road are minimized as muchas possible.
Refer to SSP 892403 “new JettaElectro-Mechanical SteeringSystem” for additionalinformation.
Steering Wheel
SteeringColumn
IntermediateShaft
Electro-MechanicalPower SteeringAssembly
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14
Steering
S321_137
SteeringPinion
S321_057
SteeringAngle Sensor
SteeringColumn
Steering ForceSensor
Control Module
Electric Motor
ToothedRack
Drive Pinion
Electro-Mechanical Power Steering
The new Jetta features an electro-mechanical power steering system. Thissteering system consists of a steeringassist pump and an electric motor with acontrol module that is installed on thesubframe. The steering assistance providedto the steering gear is similar to previousbelt-driven systems.
Electro-mechanical power steering providesassist depending on vehicle speed, steeringforce and steering angle.
The control module is located near theelectric motor and receives its data fromthe Drivetrain CAN-bus.
Refer to SSP 892403 “new JettaElectro-Mechanical SteeringSystem” for additionalinformation.
15
Steering
Steering Wheels
The standard steering wheel on the newJetta has three-spokes with a polyurethane(PU) covering. There is also a one-piece castmagnesium frame steering wheel with softleather covering available.
The airbag module is installed in thesteering wheel during manufacture and canonly be removed if the steering column isunlocked. An anti-theft feature preventsunauthorized removal of the driver airbag.
The cross sectional diagram below showsthe design of the multi-function steeringwheel.
Typical Steering Wheel Cross-Section
S321_196MagnesiumFrame
PU FoamCovering
Sheet Metal Plate
Leather Covering
Mounting for RightMulti-Function Switch
Leather Covering ofLeft Spoke Trim
Leather Covering ofRight Spoke Trim
Mounting for LeftMulti-Function Switch
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16
Steering
Steering Column
The steering column features optional tiltand extension adjustments. The column canbe adjusted up and down by 2.0 in. (50mm)and in and out by 2.4 in. (60mm) toaccommodate individual driverrequirements or preferences.
Steering wheel adjustment is done througha multi-plate bundle consisting of ten steelplates; five plates in the horizontal plane forthe extension adjustment and five plates inthe vertical plane for the tilt adjustment.
Multi-Plate Bundlefor Tilt Adjustment
S321_084
Multi-Plate Bundle forExtension Adjustment
The steering column attaches to theinstrument panel by an aluminum bracket.
17
Steering
Clamping
Clamping action is performed by two rollersthat move up a ramp to lock the steeringwheel in the desired position. This forcesthe multi-plate bundle together by pressurefrom the thrust block.
Multi-Plate Bundle Released
Multi-Plate Bundle Locked in Position
S321_128
S321_126
Plates for ExtensionAdjustment
Thrust Block
Roller
Plates for TiltAdjustment
Ramp
Plates for ExtensionAdjustment
Thrust Block
Roller
Plates for TiltAdjustment
Ramp
Since gear teeth are not used in theclamping mechanism, component wear isnegligible.
18
Steering
Collision Features
To protect the driver, the steering columnand the intermediate shaft slide into eachother and disengage from the steering gearin the event of a head-on collision wherethe steering gear is forced toward thedriver.
The cradle and housing are connected by ashear plate. In the event of a crash, theshear plate moves as a result of the forceof the driver against the cradle.
The design of the shear plate providesprogressive travel depending on the forceapplied.
ShearPlate
S321_130
S321_173
Housing
Cradle
19
Brake System
Handbrake
FrontCaliperBrake Servo
BrakeLines
Rear Caliper
Brake Cable
ABS/ESPModule
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Brake System
The newly designed braking system on thenew Jetta presents the driver with thelatest generation ABS/ESP combined withits state of the art power brake assistsystem.
Overview
20
Brake System
Brake Caliper Assemblies
All brake caliper assemblies are made ofnon-hazardous materials.
The front calipers are vented discs thatrange in size from 11.3 in. x 1.0 in.(288mm x 25mm) to 12.3 in. x 1.0 in.(312mm x 25mm) depending on model andoptions. The front calipers are also betterprotected from road debris, moisture andcorrosion by the addition of protectiveplates.
Rear Caliper
The rear brake calipers are solid discsthat range in size from 10.2 in. x .4 in.(260mm x 10mm) to 11.2 in. x .5 in.(286mm x 12mm) depending on model andoptions.
The calipers have been designed toimprove resistance to moisture andcorrosion and are mounted forward of therear axle center line like front axle calipers.This provides optimal brake performancefrom the rear calipers. S321_168
S321_158
21
Brake System
Anti-Lock Braking System ABS/ESP
The Continental/Teves MK 60 ABS/ESPfeatures:• Active wheel speed sensor
• Combined ESP-Sensor Unit G419 (yawrate/lateral acceleration sensor)
• The Brake Pressure Sensor 1 G201 ispart of the ESP module. In the past, thebrake pressure sensor was mounted onthe master cylinder
• New ESP warning lamp
S321_192
22
Brake System
Brake Pressure Sensor 1 G201
The Brake Pressure Sensor 1 G201measures the pressure applied at the brakepedal. To provide additional safety, thesensor sends two separate pressuresignals to the control module.
These two signals are sent at the sametime as opposite voltages. The controlmodule constantly compares the twosignals.
ABS Control Module J104 with Brake PressureSensor 1 G201
Electrical Contact
The brake pressure sensor communicateswith the ABS Control Module J104 throughfour contact springs. Two contacts supplypower and two send separate pressuresignals.
Brake Pressure Sensor
S321_060Brake Pressure SensorSpring Contacts
23
Brake System
Construction
The sensor operates by piezo resistanceusing the change in conductivity caused bydeformation. Four piezo resistive measuringelements are bridged together (5) on amembrane (6).
1. Measuring Chamber2. Piezo Resistive Thick Film Sensor Element3. Sensor Electronics and Signal Amplifier4. Contact Springs to ABS Control Module J104
S321_175
S321_176 S321_178
5. Piezo Resistive Measuring Bridge6. Flexible Thick Film Membrane7. Piezo Bridge Elements within Measuring Bridge
Function
As pressure (P) increases, the length of themembrane (6) and the imbedded piezoresistive measuring bridge (5) increases.This change in length alters the charge inthe piezo elements.
This change in the electrical charge of thepiezo bridge elements is proportional to thepressure applied. This charge is amplifiedand the signal is transmitted to the ABSControl Module J104.
The piezo resistive measuring elements areresistors made from semi-conductormaterial that functions much like abi-metallic strip.
Self-Diagnosis
The electronic control module monitors thepressure sensor’s output signals. If thesignals deviate beyond a specified range, afault is set by the control module.
Effects of Failure
If the pressure sensor fails, the ESPreduces its functions to ABS and EBD(electronic brake pressure distribution).
24
Brake System
Optimized Hydraulic Brake Servo(OHBS)
One method of providing brake assist is tosupply vacuum pressure to the brake servofrom the intake manifold. On gasolineengines with automatic transmissions, theavailable vacuum pressure can dropsignificantly under certain conditions (coldstarts). This limits brake assist.
S321_062Brake Pedal Pressure
Bra
ke P
ress
ure
Braking Assistance Using OHBS
Point of BrakeServo Actuation
Lower Vacuum Level (e.g. Cold Start)
Map Characteristicat 800 Mbar Vacuum
On previous brake assist systems, thenecessary vacuum was provided by anauxiliary unit, such as an electric vacuumpump.
The new Jetta uses its ESP hydraulics toprovide the necessary brake assist.
25
Brake System
Function
On the OHBS system, the loss of brakingassistance is offset with an active andcontrolled build-up of brake pressure fromthe ESP hydraulics. To provide this assist,pneumatic pressure in both chambers ofthe brake servo (BS) is measured. Thepressure difference is used to determinethe maximum amount of braking assistanceavailable. When the pressure in bothchambers is equal, the point of brake servoactuation has been reached and anyadditional increase in braking force is onlypossible by an increase in brake pedalpressure without assist.
The ABS Control Module J104 uses astored program to control the build-up ofbrake pressure, depending on the pressuredifference in the servo chambers. However,if the intake manifold vacuum is too low,actuation occurs even when brake pressurelevels are lower than the specified amount.
This occurs with a controlled build-up ofbrake pressure, initiated by the ESPhydraulics. When compared to conventionalbraking assistance, the driver does notnotice any difference in the force applied tothe brake pedal.
To enable the controlled build-up of brakepressure, new solenoid valves are used toswitch to the ESP controlled mode.
These valves are controlled by the amountof time that they are open, allowing theassist provided to be altered to meetchanging requirements.
26
Brake System
ESP and CAN Communication
The ESP Control Module J104 exchangesdata with other control modules of the databus on board diagnostic interface network,as shown in the diagram below.
J104ABS/ESP ControlModule
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J533Data Bus On BoardDiagnostic Interface
Diagnosis Connection
J285Instrument Cluster ControlModule
J220Motronic EngineControl Module
J217Transmission ControlModule (TCM)
J527Steering ColumnElectronic SystemsControl Module
G85Steering Angle Sensor
J500Power Steering ControlModule
Drivetrain CAN-bus
Diagnosis CAN-bus
Instrument Cluster CAN-bus
Data Wiring
27
Brake System
Handbrake
The new design of the new Jetta handbrakereduces the space it requires in the centerconsole. This allows additional storagebehind the handbrake. The lever is pressurecast from magnesium, resulting in a weightsaving of more than 50% compared to thesteel mechanism.
S321_073
28
Brake System
The toothed part of the mechanism issecurely attached to the bearing bracket. Inthe released position, the pawl engages thetoothed part and locks the brake lever inposition.
When the release button is pressed, thepawl is pulled away from the toothed partand the brake lever is free to move.
S321_203
S321_201
29
Pedal Assemblies
Pedal Assemblies
The foot pedal assemblies have beenredesigned for the new Jetta. Accelerator,clutch and brake pedals are modulardesigns.
S321_087
Clutch Pedal withClutch Position Sensor
Clutch Position Sensor G476
Location
The clutch position sensor is attached tothe clutch master cylinder. This sensordetects clutch pedal movement.
Sensor Signal
When the clutch pedal is pressed:• The cruise control system is turned OFF
• The amount of fuel injected is reducedbriefly to reduce gear change jolts
S321_195
30
Pedal Assemblies
How It Works
The clutch master cylinder is attached tothe bearing bracket using a bayonet-typeconnector.
When the clutch pedal is pressed, theplunger moves the piston in the mastercylinder.
Clutch Pedal Not Pressed
When the clutch pedal is not pressed, theplunger and piston are in the rest position.The clutch position sensor sends a voltagesignal, which is two volts less than batteryvoltage, to the engine control module.
Clutch Pedal Pressed
When the clutch pedal is pressed, thepiston is pushed in the direction of theclutch position sensor. The front end of thepiston has a permanent magnet attached.
As soon as the permanent magnet passesthe switch point of the Hall effect sensor,the voltage signal that has been reducedzero to two volts is sent to the enginecontrol module. This signals the enginecontrol module that the clutch pedal hasbeen depressed.
S321_204Piston with PermanentMagnet
Pedal Travel
ClutchPositionSensor
PlungerBearing Bracket
Clutch MasterCylinder
S321_224
S321_226
Piston withPermanentMagnet
Piston withPermanentMagnet
Plunger
Plunger
Switch Point(Hall Effect Sensor)
Switch Point(Hall EffectSensor)
ClutchPositionSensor
ClutchPositionSensor Voltage Signal to
Engine ControlModule
Voltage Signal toEngine ControlModule
31
Pedal Assemblies
Accelerator Pedal withPosition Sensors G79 andG185
Accelerator Pedal Position SensorsG79 and G185
Both accelerator pedal position sensors arepart of the accelerator pedal module andoperate as inductive sensors without directcontact.
Advantages• No wear because sensors operate
without contact
• No kick-down setting necessarybecause the sensor is part of theaccelerator pedal module
Sensor Signal
The engine control module uses theaccelerator pedal position sensor signals tocontrol the amount of fuel injected into thecylinders.
Effects of Signal Failure
In the event of failure in one or bothsensors, a fault code is stored and theelectronic power control (EPC) warninglamp illuminates.
Also, convenience features, such as cruisecontrol and engine braking control aredeactivated.
Sensor Failures
If one sensor fails, the system will set itselfto the idle position. If the second sensor isdetected at idle within a specified period,the system will resume normal drivingmode.
If the accelerator pedal is moved to fullthrottle, engine speed will increase slowly.
If both sensors fail, the engine will only runat fast idle (maximum 1500 rpm) and willnot respond to input from the acceleratorpedal.
S321_217
32
Pedal Assemblies
Pedal Assembly Design Features
The accelerator pedal module consists ofthe accelerator pedal, the pedal end stop,the mechanical components necessary toconvert rotational motion to linear motion,and both the Throttle Position Sensor G79and the Accelerator Pedal Position SensorG185.
The sensors are mounted on a circuit boardand each sensor consists of an exciter coil,three receiver coils, and electronics formonitoring control. For added safety, thetwo sensors function independently.
The mechanical components of theaccelerator pedal module convert leveragedrotational movement into straight linemotion.
Accelerator Pedal Not Pressed
A small metal plate is attached so thatwhen the accelerator pedal is actuated, it isbrought in line just short of the circuitboard.
Accelerator Pedal Pressed
S321_220S321_222
ExciterCoils
Area ofReceiverCoils
MechanicalComponents Small
MetalPlate
CircuitBoard
MechanicalComponents
SmallMetalPlate
CircuitBoard
S321_219
MechanicalComponents
Cover
CircuitBoard
SmallMetalPlate
33
Pedal Assemblies
How It Works
The pedal assembly electronics receivesfive volts and generates a high frequencyalternating voltage that produces analternating electro-magnetic field. This fieldaffects the moving small metal plate andproduces a second alternatingelectro-magnetic field around the smallmetal plate.
This location-dependent alternating fieldinfluences the receiver coils, producing analternating signal.
The strength of this alternating voltagedepends upon the position of the smallmetal plate. Different positions result indifferent coverage of the receiver coils bythe small metal plate.
The idle position results in the leastcoverage and the lowest inducedalternating voltage.
The full throttle position (kick-down onautomatic transmissions) coverage resultsin the greatest and the highest inducedalternating voltage.
Accelerator Pedal Signal
The accelerator pedal electronics set thealternating voltages of the three receivercoils at a common value, amplify them, andbring them together for processing. Afterprocessing, the result is converted to alinear voltage signal and transmitted to theengine control module.
KickdownArea
ExciterCoils
SmallMetalPlate
ReceiverCoils
S321_232
Diesel Direct Fuel Injection(DFI) Engine ControlModule (ECM) J248
Electronics forEvaluation
Electro-MagneticAlternating Fieldof Small MetalPlate
Electro-MagneticAlternating Fieldof Exciter Coil
S321_228
S321_230Small Metal Plateat Full ThrottlePosition
Small MetalPlate at IdlePosition
Accelerator Pedal Position
Sig
nal V
olta
ge in
Vol
ts
Accelerator Pedal Position Travel
FullThrottleStop
AcceleratorPedal EndStop
34
Service
S321_120
S321_118
S321_116
Axle Geometry
The new Jetta rear axle track and cambercan be set independently.
The track is adjusted by turning an eccentricbolt that joins the lower link and subframe.
The camber is adjusted by turning aneccentric bolt that joins the link to thesubframe.
To adjust the camber, use thefollowing required special tools:
• Shock Absorber Set T10001
• Ring Spanner T10179
35
Service
S321_200
Description Tool Application
T10179Ring Spanner
T10219 (1)Sleeve
T10219 (2) Drift
T10149 Support
T10238 Release Tool (1)T10240 Release Tool (2)
For adjusting camber on rear axle, use with shock absorber set T10001.
For replacing bonded rubber bushing on the front axle wishbone.
For adjusting unloaded position of bonded rubber bushings on the front and rear axles.
Release tool for accelerator pedal module, LHD (1) and RHD (2)
(1) (2)
(1) (2)
S321_114
S321_112
S321_194
S861403_02
Special Tools
36
Knowledge Assessment
An on-line Knowledge Assessment (exam) is available for this Self-Study Program.
The Knowledge Assessment may or may not be required for Certification.
You can find this Knowledge Assessment at:
www.vwwebsource.com
From the vwwebsource.com Homepage:
– Click on the Certification tab
– Type the course number in the Search box
– Click “Go!” and wait until the screen refreshes
– Click “Start” to begin the Assessment
For Assistance, please call:
Certification Program Headquarters
1 – 877 – CU4 – CERT
(1 – 877 – 284 – 2378)
(8:00 a.m. to 8:00 p.m. EST)
Or, E-Mail:
Volkswagen of America, Inc.3800 Hamlin RoadAuburn Hills, MI 48326Printed in U.S.A.December, 2004