Diagnostic Test

1) VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

With the scan tool, read active DTCs.

Is this DTC active?

Yes
1. Go To 2).
No
1. Refer to the STORED LOST COMMUNICATION DTC'S test procedure.
2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read all active DTCs from all modules.

NOTE: Check for TIPM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs to the conditions listed above?

Yes
1. Diagnose and repair the DTC. Refer to the appropriate ELECTRICAL DIAGNOSTICS article.
No
1. Go To 3).
3) VERIFY THAT THE TIPM IS ACTIVE ON THE BUS
Turn the ignition on.

With the scan tool, select Network Diagnostics.

Verify that the TIPM is active on the bus.

Is the TIPM active on the bus?

Yes
1. Go To 4).
No
1. Refer to the NO RESPONSE test procedures in the ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS article.
4) CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network Diagnostics.

Is there more than one module with active DTCs "Logged Against" the TIPM?

Yes
1. Replace/update the Totally Integrated Power Module (TIPM) in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1. Refer to STANDARD PROCEDURE .
No
1. Replace/update the module that set this DTC in accordance with the service information
2. Perform the appropriate VERIFICATION TEST.