DRIVE GP-FINAL 5039734 - Caterpillar

Illustration 1 g02364476
Schematic of the Cat Data Link.
This diagnostic code is associated with the communication between the Messenger ECM and the Implement ECM. The communication is conducted on the Cat Data Link circuit.FMI 09 means that the Messenger ECM is not receiving communication from the Implement ECM on the Cat Data Link circuit.A CID 0248 FMI 09 companion diagnostic code is activated when the CID 0596 FMI 09 diagnostic code is activated by the Messenger ECM. CID 0248 FMI 09 indicates the Cat Data Link is involved.Note: CID 0248 FMI 09 is cleared when the CID 0596 FMI 09 diagnostic code is cleared.The possible causes of the CID 0596 FMI 09 diagnostic code are listed below:
An ECM or smart device not powering up
Lack of keyswitch input to an ECM or smart device (where applicable)
Excessive data link circuit noise
Data link circuit open or poor connection
Software configuration mismatch
Implement ECM failure
Messenger failureNote: A loss of power in the system to the Implement ECM can cause the Messenger ECM to activate this diagnostic code. Ensure that the Implement ECM is powered up before proceeding with this procedure.Note: Make sure that CID 0596 FMI 09 is active before performing this procedure.Test Step 1. DETERMINE THAT THE DATA LINK COMPANION CODE IS ACTIVE
Check the list of active diagnostic codes to determine that the CID 0248 FMI 09 companion diagnostic code is active. Results:
OK - CID 0248 FMI 09 is active, indicating that the problem is in the Cat Data Link. Proceed to the diagnostics for CID 0248 FMI 09.