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:

Visual Inspection Chart

NOTE: For multi-function switch concerns, refer to one of the following sections:
^ 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, go to Instrument Panel, Gauges and Warning Indicators.
^ System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the instrument cluster.

7. If the DTCs retrieved are related to the instrument cluster, go to Instrument Panel, Gauges and Warning Indicators.
8. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures
9. If DTCs related to the smart junction box are retrieved, go to the smart junction box DTC table Index. Diagnostic Trouble Code Tests and Associated Procedures