ELBOW 8H2712 - Caterpillar

Illustration 1 g03330520
CAT Data Link SchematicThis diagnostic code is recorded when the Engine ECM is not sending the necessary parameters to the Messenger module at the proper rate. The update rate for parameters that are generated by the Engine ECM is not correct.The possible causes of this diagnostic code are listed:
The Engine ECM has the incorrect software installed.
The Messenger ECM has the incorrect software installed.
Incompatible software may be installed.Test Step 1. CHECK THE ENGINE ECM AND THE MESSENGER 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 Messenger 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 key switch 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 Ensure that the diagnostic code is no longer active.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 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, replace the Messenger ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". If the Messenger ECM was replaced, install a new Engine ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace" for the engine that is being serviced.STOP