TOYOTA PARKING ASSIST-SENSOR SYSTEM SYSTEM DESCRIPTION


  1. GENERAL


    1. When the vehicle is driven at 9 km/h (5.8 mph) or less, the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle. The system then informs the driver of the distance between the sensors and the obstacles as well as their positions by indicating them on the combination meter and by sounding a buzzer.

  2. FUNCTION OF COMPONENTS

    Components Function
    No. 1 ultrasonic sensor No. 1 ultrasonic sensor sends and receives ultrasonic waves. Based on received wave, sensor calculates the approximate distance value between vehicle and obstacle, and sends distance value as a signal to parking assist ECU*1 or clearance warning ECU assembly*2.
    Combination meter assembly

    • Displays the location of an obstacle and the approximate distance between the vehicle and obstacle. Turns the intuitive parking assist system on and off.

    • Emits an intermittent sound to inform the driver that ECU has detected an obstacle within prescribed ranges.
    Back sonar or clearance sonar switch assembly Outputs system ON/OFF signals to parking assist ECU*1 or clearance warning ECU aswsembly*2.

    • Parking assist ECU*1

    • Clearance warning ECU assembly*2

    • Receives signals from the No. 1 ultrasonic sensors and sends the display signal to the combination meter assembly and multi-display assembly.

    • Receives signals from the No. 1 ultrasonic sensors and sends buzzer signal to No. 1 clearance warning buzzer.
    Park/neutral position switch assembly Sends a signal that activates the TOYOTA parking assist-sensor system when the shift lever is moved to R.
    Multi-display assembly Receives the information from the parking assist ECU*1 or clearance warning ECU assembly*2 through the CAN, and then displays the detection information.
    No. 1 clearance warning buzzer Sounds the buzzer to inform the driver according to the distance to the obstacle.
    Main body ECU (cowl side junction block LH) Transmits destination symbol, dimmer signal and steering wheel symbol to parking assist ECU*1 or clearance warning ECU assembly*2.
    Air conditioning amplifier assembly Transmits ambient temperature to parking assist ECU*1 or clearance warning ECU assembly*2.
    Windshield wiper switch assembly Transmits wiper status signal to parking assist ECU*1.
    ECM Transmits shift position signal to parking assist ECU*1 or clearance warning ECU assembly*2.

    • *1: w/ Side Monitor System

    • *2: w/o Side Monitor System

  3. OPERATION EXPLANATION


    1. The ECU determines whether the TOYOTA parking assist-sensor system should be operated based on the clearance sonar main switch on/off status, the shift position and the vehicle speed.

    2. When the system operates, the ECU transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within one or more of the sensors' ranges, the waves are reflected back to the sensors, which transmit them to the ECU. Based on this information, the ECU sends signals to the multi-information display, the multi-display assembly and the No. 1 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.