Component Description

Component	Function
Pre-crush seat belt control unit (driver side)	Total control of pre-crash seat belt system is operated according to transmit signal. Driver seat belt retractor integrates pre-crash seat belt control unit (driver side), driver seat belt motor, and tension reducer. Seat belt motor operates each operation of pull, return, and hold.
Pre-crush seat belt control unit (passenger side)	Control of passenger pre-crash seat belt is operated according to transmit signal. Passenger seat belt retractor integrates pre-crash seat belt control unit (driver seat), driver seat belt motor, and tension reducer. Seat belt motor operates each operation of pull, return, and hold.
Brake pedal stroke sensor	It changes voltage according to brake pedal depressed amount and sends the signal to pre-crash seat belt control unit. There are 2 signals (brake pedal stroke sensor 1 and 2) sent from the brake pedal stroke sensor. Pre-crash seat belt control unit judges the stroke amount and the speed of the brake pedal according to the voltage of the signal sent by each side.
Seat belt buckle switch (driver side)	Fastening or not fastening of seat belt is judged. This judgment is used for control of driver pre-crash seat belt system. Seat belt warning lamp on combination meter turns ON when seat belt is not fastened while ignition switch is ON. The seat belt buckle switch is installed in the seat belt buckle.
Seat belt buckle switch (passenger side)	Fastening or not fastening of seat belt is judged. This judgment is used to control passenger pre-crash seat belt system. Control of passenger seat tension reducer is operated by ON/OFF of seat belt buckle switch. The seat belt buckle switch is installed in the seat belt buckle.
Combination meter	Transmits vehicle speed signal to pre-crash seat belt control unit (driver side). Turns the seat belt warning lamp ON when the seat belt is unfastened.
ADAS control unit	Intelligent brake assistance operation signal is received from ADAS control unit via CAN communication.
Steering angle sensor	Steering angle sensor signal, steering angle speed signal, steering angle sensor neutral position adjustment completion signal, and steering angle sensor malfunction signal are received via CAN communication.
BCM	Ignition ON signal, sleep/wakeup signal, and door switch signal are received from BCM via CAN communication.
ABS actuator and electric unit (control unit)	ABS operation signal is received from ABS actuator and electric unit (control unit) via CAN communication.