Ambient Light Sensor: Testing and Inspection

OPTICAL SENSOR





Component Function Check
1.CHECK OPTICAL SENSOR SIGNAL BY CONSULT-III
CONSULT-III DATA MONITOR
1. Turn ignition switch ON.
2. Select "OPTISEN (DTCT)" of BCM (HEADLAMP) data monitor item.
3. Turn lighting switch AUTO.
4. With the optical sensor illuminating, check the monitor status.





Is the inspection result normal?
YES - Optical sensor is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK OPTICAL SENSOR POWER SUPPLY INPUT
1. Turn ignition switch ON.
2. Turn lighting switch AUTO.
3. Check voltage between optical sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 4.
2.CHECK OPTICAL SENSOR GROUND INPUT
Check voltage between optical sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 6.
3.CHECK OPTICAL SENSOR SIGNAL OUTPUT
With illuminating the optical sensor, check voltage between optical sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Replace the optical sensor.
4.CHECK OPTICAL SENSOR OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect optical sensor connector and BCM connector.
3. Check continuity between optical sensor harness connector and BCM harness connector.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace harness.
5.CHECK OPTICAL SENSOR SHORT CIRCUIT
Check continuity between optical sensor harness connector and ground.





Is the inspection result normal?
YES - Replace BCM. Service and Repair.
NO - Repair or replace harness.
6.CHECK OPTICAL SENSOR GROUND OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect optical sensor connector and BCM connector.
3. Check continuity between optical sensor harness connector and BCM harness connector.





Is the inspection result normal?
YES - Replace BCM. Service and Repair.
NO - Repair or replace harness.
7.CHECK OPTICAL SENSOR SIGNAL OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect optical sensor connector and BCM connector.
3. Check continuity between optical sensor harness connector and BCM harness connector.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace harness.
8.CHECK OPTICAL SENSOR SHORT CIRCUIT
Check continuity between optical sensor harness connector and ground.





Is the inspection result normal?
YES - Replace BCM. Service and Repair.
NO - Repair or replace harness.