LINK 2504218 - Caterpillar

Which Generate This Code:This diagnostic code is recorded when the Product Link detects a problem that is internal to the control module. This diagnostic code can only be caused if the Product Link control module is faulty. There are no serviceable parts within the control module. Test Step 1. CHECK THE HARNESS CONNECTIONS.
Disconnect and clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the key start switch to the ON position.
Operate the machine.
Determine if CID 0254 FMI 12 diagnostic code is present by using the Electronic Technician.Expected Result:The CID 0254 FMI 12 diagnostic code is present.Results:
OK - The CID 0254 FMI 12 diagnostic code is present.Repair: The problem has not been corrected. It is unlikely that the ECM is faulty. Perform the previous Steps again. If the cause of the diagnostic code is not found, replace the Product Link ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Stop.
NOT OK - The CID 0254 FMI 12 diagnostic code is not present. The problem does not exist at this time. The initial problem 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.