Overview

Circuit Description

The ECM3 lights an amber lamp when ECM1 and/or ECM2 have a Moderately Severe Fault.

Component Location

The ECMs are located on the rear of the engine. ECM1, ECM2, and ECM3 are located above the flywheel housing at the rear of the engine. Refer to Procedure 100-002 for detailed component locations.

Shop Talk

There are multiple ECMs for the engine model included in this manual. Each ECM has an individual source address that displays when INSITE™ electronic service tool is connected. When troubleshooting a fault code, use the source address displayed in INSITE™ electronic

FAULT CODE 1518At Least One Module Has A Moderately Severe Fault -

Condition Exists

CODE REASON EFFECT

Fault Code: 1518PID: SPN: 1484FMI: 31LAMP: AmberSRT:

At Least One Module Has A Moderately Severe Fault -Condition Exists

Dependent on particular faults from ECM1, ECM2, or ECM3 that triggered Fault Code 1518.

CM850 Electronic Control Module - QST30 Power Generation Interface Engine

service tool to determine which ECM and circuit is affected.

The ECM3 contains status information about ECM1 and ECM2. When ECM1 and ECM2 have a Moderately Severe Fault Code, ECM3 will recognize this and light an amber lamp. When the Fault Code 1518 is flashed out it means that ECM1 and/or ECM2 have at least one Moderately Severe Fault Code. Fault Code 1518 will be flashed out, not the individual fault codes that are causing Fault Code 1518. Since Fault Code 1518 can represent more than one Moderately Severe Fault Code, INSITE™ electronic service tool can be connected in order to read the fault code(s) causing Fault Code 1518 and to troubleshoot accordingly.

Possible causes of this fault code include:

ECM1 and/or ECM2 have at least one Moderately Severe Fault Code (Amber).

Troubleshooting Steps

Guided Step 1 - Check the ECM for fault codes.

Guided Step 1A - Check the ECM for fault codes.

STEPS SPECIFICATIONS

STEP 1. Check the ECM for fault codes.

STEP 1A. Check the ECM for fault codes.

Fault Code 1518 and other fault codes are active?

STEP 2. Clear the fault codes.

STEP 2A. Disable the fault code. Fault Code 1518 is inactive?

STEP 2B. Clear the fault code. All fault codes cleared?

Conditions

Connect all components. Turn keyswitch ON. Connect INSITE™ electronic service tool.

Action

Read the fault codes.

Guided Step 2 - Clear the fault codes.

Guided Step 2A - Disable the fault code.

Use INSITE™ electronic service tool to read fault codes.

Fault Code 1518 and other fault codes are active?

Fault Code 1518 and other fault codes are active?

YES NO

Appropriate troubleshooting steps No Repair

Go to 2A Go to 2A

Conditions

Connect all components. Turn keyswitch ON. Connect INSITE™ electronic service tool.

Action

Disable the fault code.

Use INSITE™ electronic service tool to verify that the fault code is inactive.

Fault Code 1518 is inactive? Fault Code 1518 is inactive?

YES NO

No repair. Return to the troubleshooting steps or contact a Cummins® Authorized Repair Location if all steps have been completed and checked again.

Go to 2B Go to 1A

Guided Step 2B - Clear the fault code.

Last Modified: 15-Jan-2008

Copyright© 2008Cummins, Inc.All rights reserved

Conditions

Connect all components Turn keyswitch ON Connect INSITE™ electronic service tool.

Action

Clear the inactive fault codes.

Use INSITE™ electronic service tool to clear the inactive fault codes.

All fault codes cleared? All fault codes cleared?

YES NO

No Repair Troubleshoot any remaining active fault codes.

Repair complete Appropriate troubleshooting steps