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| Illustration 1 | g01334596 |
Schematic of the Cat Data Link Circuit | |
This diagnostic code is recorded when the Machine ECM can not communicate properly with the Engine ECM. The Engine ECM does not support one or more of the parameters requested by machine control.
The possible causes of this diagnostic code are listed:
- The Machine ECM has the incorrect software installed.
- The Engine ECM has the incorrect software installed.
- Incompatible software may be installed.
Test Step 1. CHECK THE MACHINE ECM AND THE ENGINE ECM FOR PROPER SOFTWARE VERSIONS.
- Use Caterpillar Electronic Technician (ET) in order to verify that the versions of software are compatible.
Expected Result:
The proper versions of software are installed on the Engine ECM and the Machine ECM.
Results:
- YES - The versions of software are compatible. Proceed to Test Step 2.
- NO - The proper software is not installed.
Repair: Flash the proper software to the appropriate ECM. Cycle the key switch in order to initialize the new software. Ensure that the diagnostic code is no longer active.
STOP
Test Step 2. RECHECK FOR DIAGNOSTIC CODES.
- Ensure that CID 0590 FMI 14 is active.
Expected Result:
The diagnostic code is inactive. The diagnostic code indicator is inactive.
Results:
- YES - The diagnostic code indicator and the diagnostic code are inactive.
Repair: Clear the diagnostic code.
STOP
- NO - The diagnostic code is active.
Repair: Exit this procedure and perform the diagnostic code procedure again. If the problem persists, the ECM may have failed. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. See the Troubleshooting, "Electronic Control Module (ECM) - Replace".
STOP