Inspection and Verification

INSPECTION AND VERIFICATION

NOTE: Upon installation of a new LCM, the module must be reconfigured.

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If the concern remains after the inspection, 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.

4. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- SCP, ISO, UBP = all electronic control units, no response/not equipped, refer to Information Bus (Module Communications Network).
- No response/not equipped for LCM, 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 for the LCM.

6. If the DTCs retrieved are related to the concern, go to the Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index. Trouble Code Descriptions - Warning Devices
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Diagnosis By Symptom - Warning Devices