Inspection and Verification

Visually inspect for obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

MECHANICAL AND ELECTRICAL CHART

Mechanical	Electrical
Headlamp switch	Central junction box (CJB) fuse(s): 6 (15A) 15 (15A) 21 (15A) 23 (15A) 27 (20A) Battery junction box (BJB) HI-BEAM HEADLIGHTS (20A) fuse Circuitry Headlamp bulb Lighting control module (LCM) Loose or corroded connections

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
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.
If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
Carry out the DATA LINK DIAGNOSTIC TEST. If the diagnostic tool responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to MODULE COMMUNICATIONS NETWORK .
- NO RESP/NOT EQUIP for the LCM, refer to MODULE COMMUNICATIONS NETWORK .
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the LCM.
If the DTCs retrieved are related to the concern, go to the LCM DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
If no DTCs related to the concern are retrieved, proceed to the Symptom Chart.