Inspection and Verification

INSPECTION AND VERIFICATION

1. Verify the customer concern.
2. Visually inspect the following for obvious signs of electrical damage:

VISUAL INSPECTION CHART

Electrical
- Bulb(s)
- Central junction box (CJB) fuse(s):
- 21 (15A)
- 24 (15A)
- Loose or corroded connector(s)
- Vehicle security module
- Instrument cluster

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, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the diagnostic card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the data link diagnostics test. If the diagnostic tool responds with:
- CAN circuit fault; all electronic control units no response/not equipped, refer to Information Bus (Module Communications Network).
- No response/not equipped for the instrument cluster, refer to Instrument Panel, Gauges and Warning Indicators. For the vehicle security module, refer to Body Control Systems (Multifunction Electronic Control Module).
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics.

7. If the DTCs retrieved are related to the concern, go to the Instrument Cluster Diagnostic Trouble Code (DTC) Index, the Vehicle Security Module Diagnostic Trouble Code (DTC) Index, or the Power Liftgate Module Diagnostic Trouble Code (DTC) Index. Instrument Cluster Diagnostic Trouble Code (DTC) Index Vehicle Security Module Diagnostic Trouble Code (DTC) Index Power Liftgate Module Diagnostic Trouble Code (DTC) Index
8. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures