System Outline

System Outline

- In the pre-collision safety (Hereinafter called PCS), the seat belt is retracted to optimize the restraint performance with the motor by receiving signal from the pre collision sensor (Millimeter wave radar sensor + distance control ECU) and skid control ECU (3UZ-FE) or skid control ECU with actuator (2GR-FSE).

- Skid control ECU (3UZ-FE) or skid control ECU with actuator (2GR-FSE) sends trigger signal to seat belt control ECU through CAN communication when detecting certain vehicle conditions such as spin condition, under-steer condition and sudden braking. Seat belt control ECU operates PCS upon receiving the signal.

- Pre-collision sensor detects an on-coming vehicle or object on the road ahead with the millimeter wave radar and determines in advance whether a collision is unavoidable from information of the distance control ECU such as the position, speed and on-coming route of the object. The distance control ECU sends signal to seat belt control ECU through CAN communication to activate PCS motor to retract the seat belt before a crash. This function works even when the vehicle speed is 0 km/h if conditions are right.

- When the pre-collision safety system has failure, 'CHECK PCS' is shown on the multi-information display in the meter. The warning lamp exclusively for PCS is lit up then. When the system is not available due to dirt on the radar, 'PCS DISABLED NOW' is displayed and the warning lamp blinks.