Information Bus: Testing and Inspection

Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
1 Verify the customer concern.
2 Visually inspect for obvious signs of mechanical or electrical damage and system integrity.





3 If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4 If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index
For a complete list of all Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to ALL Diagnostic Trouble Codes (DTC).
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Body Control Module (BCM) Body Control Module (BCM)