Inspection and Verification
- 2.
Visually inspect for obvious signs of electrical damage.Visual Inspection Chart
Electrical Body Control Module (BCM) fuse(s):
18 (10A) (dimmable illumination)
32 (15A) (non-dimmable illumination)
Wiring, terminals or connectors
Illuminated components
BCM
Front Lighting Control Module (FLM)
- 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.NOTE: Make sure to use the latest scan tool release software.
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
- 5.NOTE: The Vehicle Communication Module (VCM) prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM :
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to Module Communications Network , No Power To The Scan Tool, to diagnose no power to the scan tool.
- 6.
If the scan tool does not communicate with the vehicle:- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to Module Communications Network , The PCM Does Not Respond To The Scan Tool, to diagnose no response from the PCM.
- 7.
Carry out the network test.- If the scan tool responds with no communication with one or more modules, refer to Module Communications Network .
- If the network test passes, retrieve and record the continuous memory DTCs.
- 9.
If the DTCs retrieved are related to the concern, go to DTC Charts . For all other DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in Multifunction Electronic Modules . If no DTCs related to the concern are retrieved, GO to Symptom Chart .