Headlamps

NOTE: The LCM must be reconfigured upon replacement. Refer to Module Communications Network (Information Bus).

1. Verify the customer concern by operating the headlamps.
2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the chart.







VISUAL INSPECTION CHART

3. If the inspection reveals obvious concern(s) that can be readily identified, repair as required.
4. If the concern remains after the inspection, connect the scan tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
^ check that the program card is properly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
5. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
6. Perform the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
^ CKT914, CKT915 or CKT7O ALL ECUS NO RESP/NOT EQUIP, refer to Heating and Air Conditioning.
^ NO RESP/NOT EQUIP for lighting control module (LCM), GO to Pinpoint Test A. Test A: No Communication With the Module - Unable to Perform On-Demand Self-Test on Lighting 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.
7. If the DTCs retrieved are related to the concern, go to the LCM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Headlamps
8. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Headlmaps