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| Illustration 1 | g00897202 |
This diagnostic code is recorded when the power train ECM does not receive the expected harness code from the Caterpillar monitoring system. The possible causes of this diagnostic code are listed below:
- The wrong software is installed on the Caterpillar monitoring system.
Test Step 1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS.
- Verify that the following information is correct:
- The part number of the flash software for the Caterpillar monitoring system
- The part number of the flash software for the power train ECM
Note: Consult your Caterpillar Dealer for the correct part numbers of the flash software.
- The part number of the flash software for the Caterpillar monitoring system
Expected Result:
All of the part numbers are correct.
Results:
- OK - All of the part numbers are correct. Proceed to Test Step 2.
- NOT OK - All of the part numbers are not correct.
Repair: The incorrect flash software is installed. Flash the correct software. See Testing and Adjusting, "Electronic Control Module (ECM) - Flash Programming" for additional information.
STOP
Test Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
- Inspect the contacts of the harness connectors and clean the contacts.
- Reconnect all harness connectors.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 0650 FMI 12.
Expected Result:
The CID 0650 FMI 12 is active.
Results:
- YES - The CID 0650 FMI 12 is active. The diagnostic code has not been corrected. The ECM may have failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing And Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
- NO - The CID 0650 FMI 12 is not active. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP