PULLEY 3216131 - Caterpillar

Illustration 1 g01453048
Connections of the Cat Data Link
This diagnostic code is recorded when the Engine ECM is not sending the necessary parameters to the Engine ECM at the proper rate. The update rate for parameters that are generated by the Power Train 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:
Software is installed on the Power Train ECM that is not correct.
Software is installed on the Engine ECM that is not correct.
Incompatible software may be installed.
The fuse for the Power Train ECM may have failed.Test Step 1. CHECK THE POWER TRAIN ECM AND THE ENGINE ECM FOR PROPER SOFTWARE VERSIONS.
Use Caterpillar 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 Power Train ECM and the Engine 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 keyswitch in order to initialize the new software. Ensure that the diagnostic code is no longer active. STOPTest Step 2. RECHECK FOR DIAGNOSTIC CODES.
Ensure that the diagnostic code 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: Ensure that the proper software is installed before replacing the ECM. If the software is correct, the Power Train ECM may have failed. It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace". If the Power Train ECM was recently replaced , the Engine ECM may have failed. It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP