Ambient Light Sensor: Service and Repair

Inspection

In the state of IGN1 ON and IGN2 ON, when MULTI FUNCTION switch module detects AUTO LIGHT switch ON, TAIL LAMP RELAY output and HEAD LAMP LOW RELAY output are controlled according to AUTO LIGHT Sensor's INPUT. In the state of IGN1 ON, when MULTI FUNCTION switch module detects AUTO LIGHT switch ON, TAIL LAMP RELAY output is controlled according to AUTO LIGHT Sensor's INPUT.
1. If IGN1 ON (for cranking) or ACC ON (for AV TAIL Function activity), the BCM supplies the power to Auto light sensor and monitors the range of this supply and raises up a failure as the supply's voltage is out of range (that is.: less than 4 Volts, more than 6 Volts).
2. The filtering of the error is 300ms to raise up this one, and also 300ms to clear this one.

Then this failure occurs and as long as this is present, the head lamp must be turned on without taking care about the sunlight level provided by the sensor.

This is designed to prevent any head lamp cut off when the failure occurs during the night.








Filtering time
- Turning ON a light : 12 ± 100 ms
- Turning OFF a light : 12 ± 100 ms

Removal

1. Disconnect the negative (-) battery terminal.
2. Remove the Photo & auto light sensor (A) using screw (-) driver.






Installation

1. Install the auto light sensor.