Ambient Light Sensor: Service and Repair

Automatic Lighting Sensor Test/Replacement

NOTE:
- Take care not to scratch the dashboard.
- Before test, perform the automatic lighting control unit input test, and check for continuity between the automatic lighting sensor and automatic lighting control unit.

1. Pry out the automatic lighting sensor (A).






2. Turn the ignition switch ON (II).
3. Measure the voltage between No. 3 and No. 5 terminals of the automatic lighting sensor 5P connector.

NOTE: The voltage readings will not change under the light of a flashlight or a fluorescent lamp. Voltage should be:

- 3.6 - 3.7 V or more with the sensor out of direct sunlight.
- 3.3 - 3.5 V or less with the sensor in direct sunlight.

4. If the voltage is not as specified, replace the automatic lighting sensor.