777G Off-Highway Truck Chassis Electronic Control System Caterpillar

Illustration 1	g02666176
Schematic of the Cat Data Link

This diagnostic code is recorded when the VIMS Application ECM does not send the necessary parameters to the Advisor ECM at the proper rate. The update rate for parameters that are generated by the VIMS Application ECM is not correct. The communication failure may be due to disconnected connectors or a faulty wiring harness.

The possible causes of this diagnostic code are listed below:

• The VIMS Application ECM has the incorrect software.

• The Advisor ECM has the incorrect software.

• Incompatible software may be installed.

• The fuse for the VIMS Application ECM may have failed.

System Response:

The machine response is listed below:

• Some implement functions may not work properly.

Test Step 1. CHECK THE VIMS APPLICATION ECM AND THE ADVISOR ECM FOR PROPER SOFTWARE VERSIONS.

1. Use Cat Electronic Technician (Cat ET) in order to verify that the versions of software are compatible.

Expected Result:

The proper versions of software are installed on the VIMS Application ECM and the Advisor ECM.

Results:

• OK - The versions of software are compatible. Proceed to Test Step 2.

• NOT OK - The proper software is not installed.

  Repair: Flash the proper software to the appropriate ECM. Cycle the key start 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 Ensure that the diagnostic code is no longer active.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.

1. Ensure that the CID 2183 FMI 14 diagnostic code is active.

Expected Result:

The diagnostic code is inactive. The diagnostic code indicator is inactive.

Results:

• OK - The diagnostic code indicator and the diagnostic code are inactive.

  Repair: Clear the diagnostic code.

  STOP

• NOT OK - The diagnostic code is active.

  Repair: Ensure that the proper software is installed before replacing the ECM. If the software is correct, the Advisor ECM may have failed. A failure of the Advisor ECM is unlikely. Exit this procedure and perform this procedure again. Prior to replacing an ECM, always contact the Technical Communicator for your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Replace" Section of this manual.

  STOP