The wiper/washer switch inputs the switch status to the body control module. A backup of the windshield wiper control unit/motor is performed via the body control module the during LO or HI switch operation in case an abnormality of the wiper/washer switch or the input of the LO and HI line is detected by the LIN.

The auto wiper signal or the auto wiper fail signal is sent via the B-CAN to the body control module.

The rear window wiper motor is controlled by the body control module. When the motor temperature becomes high because of an overload etc., the motor is stopped temporarily by its circuit breaker, interrupting the circuit.