Inspection and Verification

1. Verify the customer concern by operating the autolamps following these steps:
1 Place the ignition switch in the ON position.
2 Place the headlamp switch in the ON position.
3 Verify the low beam operation.

NOTE: For headlamp concerns, refer to Headlamps.

4 Place the headlamps in the auto lamp position.
5 Verify the autolamp operation by aiming a light at the light sensor amplifier and removing the light source and covering the light sensor amplifier. The headlamps should turn OFF with the light and illuminate with the light sensor amplifier covered.

NOTE: When aiming light and covering the light sensor amplifier, there may be a one minute delay for the autolamps to change conditions.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage.
3. 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.

4. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the DATA LINK DIAGNOSTICS TEST. If the diagnostic tool responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for FEM, refer to Multifunction Electronic Control Module (General Module).
^ NO RESP/NOT EQUIP for instrument cluster, refer to Instrument Panel, Gauges and Warning Indicators.
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the FEM.

6. If the DTCs retrieved are related to the concern, go to FEM Diagnostic Trouble Code (DTC) Index, REM Diagnostic Trouble Code (DTC) Index, Instrument Cluster Diagnostic Trouble Code (DTC) Index, or SSP Relay Index to continue diagnostics. Refer to Headlamps. Headlamp
7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Autolamps