Inspection and Verification

Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.





Visual Inspection Chart

NOTE: For multifunction switch concerns, refer to one of the following:
^ Exterior Lighting.
^ Wipers and Washers.
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 program 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 manual.
6. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
^ CAN, ISO or UBP circuit fault; all electronic control units no response/not equipped, refer to Information Bus.
^ No response/not equipped for the instrument cluster; Refer to Inst. Gauges, Warn IND.
^ System passed, retrieve and record the continuous Diagnostic Trouble Codes (DTC's), erase the continuous DTC's, and carry out the self-test diagnostics for the instrument cluster.
7. If the DTC's retrieved are related to the concern, the Instrument Cluster Diagnostic Trouble Code (DTC) Index [1][2]Diagnostic Trouble Code Descriptions
8. If no DTC's related to the concern are retrieved; Refer to Symptom Chart Symptom Related Diagnostic Procedures