#
AUTO LIGHT SENSOR OPERATION

id091800102300

  Caution

  • In the following cases, the auto light sensor cannot detect the illumination level correctly which could cause an auto light malfunction:

  - A sticker or label is adhered to the windshield above the auto light sensor.
  - The windshield is dirty above the auto light sensor.

• Installed on the underside of the rearview mirror (windshield center) and integrated with the rain sensor as a single unit.

1 | Auto light sensor
2 | Lens sensor

• The upward and forward illumination level sensors which detect the level of illumination above and in front of the vehicle respectively are built-in.

## Function Description

### Illumination level adjustment function

  • The illumination level sensitivity can be switched between two levels using the WDS or equivalent.

### On-board diagnostic function

  • If the voltage input to the auto-light sensor is not within the operational voltage (approx. 9-16 V), the auto light control module is informed of the malfunction and a auto light control module DTC is detected.