Inspection & Verification: Notes
NOTE:
The LCM must be reconfigured upon replacement. Refer to MODULE CONFIGURATION
.
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage. Check for blown fuses, faulty headlamp switch and defective wiring:
- 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 properly 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.
- Perform the DATA LINK DIAGNOSTIC TEST. If the diagnostic tool responds with:
- CKT914, CKT915 or CKT70 = ALLECUS NO RESP/NOT EQUIP, refer to MODULE COMMUNICATIONS NETWORK article.
- NO RESP/NOT EQUIP for lighting control module (LCM), go to PINPOINT TEST A .
- 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 to continue diagnostics.
- If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.