Inspection and Verification

INSPECTION AND VERIFICATION
1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage.
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 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.

5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.

NOTE: Make sure the headlamp switch is in the OFF position and high beam switch is in the low beam position before carrying out diagnostic tests.

6. Carry out the DATA LINK DIAGNOSTICS TEST. If the diagnostic tool responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus (Module Communications Network).
- NO RESP/NOT EQUIP 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 the self-test diagnostics for the LCM.

7. If the DTCs retrieved are related to the concern, go to the LCM Diagnostic Trouble Code (DTC) Index. Autolamps
8. If no DTCs related to the concern are retrieved, go to the Symptom Chart. Autolamps