Ambient Light Sensor: Testing and Inspection

OPTICAL SENSOR

Component Function Check


1. CHECK OPTICAL SENSOR SIGNAL BY CONSULT

CONSULT DATA MONITOR
1.Turn power 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- Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK OPTICAL SENSOR POWER SUPPLY INPUT

1.Turn power 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.





*: Illuminate the optical sensor. The value may be less than the standard if brightness is weak.
Is the inspection result normal?
YES- GO TO 7.
NO- Replace the optical sensor.

4. CHECK OPTICAL SENSOR OPEN CIRCUIT

1.Turn power 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. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness.

6. CHECK OPTICAL SENSOR GROUND OPEN CIRCUIT

1.Turn power 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. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness.

7. CHECK OPTICAL SENSOR SIGNAL OPEN CIRCUIT

1.Turn power 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. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness.