Hyundai Sonata: Auto Light Sensor. Repair procedures - Auto Lighting Control System - Body Electrical SystemHyundai Sonata: Auto Light Sensor. Repair procedures

Inspection

In the state of IGN1 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.
The auto light control doesn't work if the pin sunlight supply (5V regulated power from Ignition 1 power to sunlight sensor) is in short circuit with the ground.
If IGN1 ON, The BCM monitors the range of this supply and raises up a failure as soon as the supply’s voltage is out of range. 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.

Removal

1.
Disconnect the negative (-) battery terminal.
2.
Remove the auto light sensor (A) from crash pad upper side by using screw (-) driver.

3.
Remove the auto light connector.

Installation

1.
Reconnect the auto light connector.
2.
Install the auto light sensor.

    Auto Light Switch. Repair procedures
    Inspection Lighting Switch Inspection With the multi function switch in each position, make sure that continuity exists between the terminals below. If continuity is not as specified, repla ...

    See also:

    Repair procedures
    Operation and Leakage Check Check all of the following items: Component Procedure Brake Booster (A) Check brake operation by applying the brakes ...

    Hazard warning flasher
    The hazard warning flasher should be used whenever you find it necessary to stop the car in a hazardous location. When you must make such an emergency stop, always pull off the road as far as ...

    Components and Components Location
    Component ...