Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Ambient Light Sensor: Service and Repair




Automatic Lighting Sensor Test/Replacement

NOTE: Take care not to scratch the dashboard.

1. Pop out the automatic lighting/sun light sensor (A).






2. Turn the ignition switch to ON (II).

3. Measure the voltage between automatic lighting sensor 5P connector terminals No. 1 and No. 3.

- About 3.6 V in direct sunlight.
- About 0.2 V when the sensor is covered up.

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

NOTE: In auto mode, the headlights should turn on at about 1.4 V or less, and turn off at about 2.2 V or more.