Ambient Light Sensor: Testing and Inspection

Inspection

1. Ignition "ON"
2. Using the scan tool.
3. Emit intensive light toward auto light sensor using sunshine, and check the output voltage change.
4. The voltage will rise with higher intensive light and reduce with lower intensive light.













NOTE:
When checking auto light sensor, select a place where sun shines directly on it.

5. If the measured resistance is not specification, substitute with a known-good auto light sensor and check for proper operation.
6. If the problem is corrected, replace the auto light sensor.
7. Remove the photo & auto light sensor (A) from the upper crash pad.




8. Disconnect the 6P connector from the auto light sensor then inspect the connector on the wire harness side, as shown in the chart.





9. If the circuit is not as specified, inspect the circuits connected to other parts.