Component Tests and General Diagnostics

Inspection and Verification

1. Verify the customer concern by operating the headlamps.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the chart:
3. If the inspection reveals obvious concern(s) that can be readily identified, repair as necessary.
4. If the cause of the fault is not visually evident, proceed to the WDS or equivalent Tester diagnostics.
5. If the concern remains after the inspection, connect the WDS or equivalent Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the WDS or equivalent Tester menu. If the WDS or equivalent Tester does not communicate with the vehicle:
1. check that the program card is correctly installed.
2. check the connections to the vehicle.
3. check the ignition switch position.
6. If the WDS or equivalent Tester still does not communicate with the vehicle, refer to the WDS or equivalent Tester manual.
7. Carry out the DATA LINK DIAGNOSTIC TEST. If the WDS or equivalent Tester responds with:
1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to COMMUNICATIONS NETWORK.
2. NO RESP/NOT EQUIP for hybrid electronic cluster (instrument cluster), refer to PINPOINT TEST 1: BOTH HEADLAMPS ARE INOPERATIVE.
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the instrument cluster.

8. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Headlamp
9. If no DTCs related to the concern are retrieved, proceed to SYMPTOM TROUBLESHOOTING CHART - HEADLAMPS. Symptom Related Diagnostic Procedures