TOYOTA PARKING ASSIST-SENSOR SYSTEM SYSTEM DESCRIPTION


  1. GENERAL


    1. When the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle, the system informs the driver of the distance between the sensors and the obstacles by sounding a buzzer.

  2. FUNCTION OF COMPONENTS

    Components Function
    Ultrasonic sensor The ultrasonic sensor sends and receives ultrasonic waves.
    Back sonar or clearance sonar switch Supply electrical power to the sensors. Outputs system on/off signals to the clearance warning ECU.
    Clearance warning ECU Receives signals from the ultrasonic sensors. Based on the received wave, the ECU calculates the approximate distance value between the vehicle and obstacle, and sends a buzzer signal to the No. 1 clearance warning buzzer.

    • Park/neutral position switch*1

    • Back-up light switch*2

    Sends a signal that activates the TOYOTA parking assist-sensor system when the shift lever is moved to R.
    No. 1 clearance warning buzzer Sounds the buzzer to inform the driver according to the distance to the obstacle.

    • *1: for CVT

    • *2: for Manual Transaxle

  3. OPERATION EXPLANATION


    1. The clearance warning ECU determines whether the TOYOTA parking assist-sensor system should be operated based on the back sonar or clearance sonar switch on/off status and the shift position.

    2. When the system operates, the ECU transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within the range of one or more of the sensors, the waves are reflected back to the sensors, which transmit them to the ECU. Based on this information, the ECU sends signals to the clearance warning buzzer. The approximate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds.

      Tech Tips

      Refer to "Operation Check" for the detailed operation Click here.