Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- With the scan tool, read Adaptive Front Lighting System (AFLS) Module DTCs and record on the repair order.
- With the scan tool, erase DTCs.
- Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read AFLS Module DTCs.
Did the DTC return?
Yes
- Go to 2
No
- Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
- CHECK THE REAR HEADLAMP LEVEL SENSOR AND ADAPTIVE FRONT LIGHTING SYSTEM (AFLS) MODULE CONNECTIONS
- Check for loose, damaged or corroded connections on the Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.
Are there any loose or damaged connections?
Yes
- Repair the connections as necessary.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go to 3
- Check for loose, damaged or corroded connections on the Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.
- CHECK THE (L963) HEADLAMP LEVELING SENSOR REAR SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
- Check for an open or high resistance on the (L963) Headlamp Leveling Sensor Rear Signal circuit between Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.
Is there an open or high resistance on the (L963) Headlamp Leveling Sensor Rear Signal circuit?
Yes
- Repair the open or high resistance on the (L963) Headlamp Leveling Sensor Rear Signal circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go to 4
- Check for an open or high resistance on the (L963) Headlamp Leveling Sensor Rear Signal circuit between Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.
- CHECK THE (L963) HEADLAMP LEVELING SENSOR REAR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE OR SHORT TO GROUND
- Check for a short to voltage or short to ground on the (L963) Headlamp Leveling Sensor Rear Signal circuit between Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.
Is there a short to voltage or short to ground on the (L963) Headlamp Leveling Sensor Rear Signal circuit?
Yes
- Repair the short to voltage or short to ground on the (L963) Headlamp Leveling Sensor Rear Signal circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace the Rear Headlamp Level Sensor in accordance with the Service Information. Refer to SENSOR, AXLE, REMOVAL AND INSTALLATION .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- Check for a short to voltage or short to ground on the (L963) Headlamp Leveling Sensor Rear Signal circuit between Rear Headlamp Level Sensor harness connector and Adaptive Front Lighting System (AFLS) Module harness connector.