The light & rain sensor detects the outside ambient light level, forward light level and sensor conditions.
Based on ambient light level (day/night detection), forward light level (tunnel detection) and sensor conditions it judges ON/OFF condition for exterior lights.
And it transmits exterior light ON/OFF request to the BCM by the LIN communication line.
BCM controls each function depending on the signals. And it detects the LIN communication line error and the light & rain sensor malfunction.
INDIVIDUAL COMPONENT FUNCTION
Detects the outside brightness.
COMPONENT OPERATION
Light & rain sensor detects the outside vehicle of brightness, and request the auto light function to BCM (via serial link).