Repair Procedures: Inspection

In the state of IGN1 ON, when the 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.

During IGN1 ON, the BCM monitors the range of this supply and alerts the failure as soon as the supply's voltage is out of range. When this failure occurs and persists, the head lamp must be turned on regardless of the sunlight level detected by the sensor.

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