Component Tests and General Diagnostics

1. Verify the customer concern by operating the head- lamps.

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 NGS Tester diagnostics.
5. If the concern remains after the inspection, connect the NGS Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS Tester menu. If the NGS 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 NGS Tester still does not communicate with the vehicle, refer to the NGS Tester manual.

7. Carry out the DATA LINK DIAGNOSTIC TEST. If the NGS Tester responds with:
1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, see COMMUNICATIONS NETWORK.
2. NO RESP/NOT EQUIP for hybrid electronic cluster (instrument cluster), see 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.
9. If no DTCs related to the concern are retrieved, proceed to TROUBLESHOOTING INDEX.