Lamp Control Module: Description and Operation
LIGHT AUTO TURN OFFSYSTEM OUTLINE
The light auto turn off system automatically turns the taillight or headlight off according to the door open or close on the driver's side, and prevent failing to turn off the lights.
If the ignition switch is turned to OFF from ON with the headlight or taillight on, the signal is input in the body ECU. If the driver's seat door is opened at that time, the signal from the door courtesy SW front LH is sent to the body ECU. The signal turns the headlight or taillight off by the body ECU.