TOYOTA PARKING ASSIST-SENSOR SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Clearance Warning ECU Assembly

    • Judges the approximate distance between the vehicle and an obstacle based on signals from the ultrasonic sensors. Output signals are sent to the combination meter assembly, radio and display receiver assembly*1 or navigation receiver assembly*2.

    • Sounds the No. 1 clearance warning buzzer.
    No. 1 Ultrasonic Sensor (4) Detects the distance between the vehicle and an obstacle.
    No. 1 Clearance Warning Buzzer Sounds to inform the driver according to the distance to the obstacle.
    Combination Meter Assembly Clearance Sonar Indicator Light Illuminates to inform the driver when the system operation conditions are met.
    Multi-information Display

    • Displays the location of the obstacle and the approximate distance between the vehicle and the obstacle.

    • Displays an indication of a malfunction or freezing of an ultrasonic sensor to inform the driver.
    Master Warning Light Illuminates in accordance with the indication on the multi-information display.
    Radio and Display Receiver Assembly*1

    • Displays the location of an obstacle and the approximate distance between the vehicle and the obstacle.

    • Displays an indication of a malfunction or freezing of an ultrasonic sensor to inform the driver.

    • The sound volume, distance required to sound the buzzer and distance required to trigger the display can be chosen on the setup screen for the TOYOTA parking assist-sensor system.

    • Transmits the setup signal for the TOYOTA parking assist-sensor system to the clearance warning ECU assembly.
    Navigation Receiver Assembly*2
    Back Sonar or Clearance Sonar Switch Assembly Operating this switch allows the operation of the TOYOTA parking assist-sensor system to be enabled or disabled.
    Main Body ECU (Multiplex Network Body ECU) Sends model destination signal (information to indicate the market the vehicle was built for) to the clearance warning ECU assembly.
    Park/Neutral Position Switch Assembly Transmits the shift position signal to the ECM.
    ECM Transmits the shift position signal to the clearance warning ECU assembly.

    *1: Models with display audio system

    *2: Models with navigation system

  2. SYSTEM CONTROL


    1. Detection Area


      1. The detection areas of the ultrasonic sensor are as shown in the following illustration.

      2. These detection areas are applicable when positioning a 60 mm (2.36 in.) diameter pole parallel or perpendicular to the ground. The ranges vary depending on the measuring method and type of obstacle.

        Figure 1. Corner Area

        A018GO2C01
        *a Approximately 1000 mm (39.4 in.) *b Approximately 600 mm (23.6 in.)
        *c Approximately 450 mm (17.7 in.) *d Approximately 200 mm (7.87 in.)

        Note

        The ultrasonic sensor side view detection range area (labeled*1) represents the cross section of the top view of the lines of detection range A. The area *1 does not represent the entire side view detection range.

        Figure 2. Center Area

        A018G83C01
        *a Approximately 1800 mm (70.9 in.) *b Approximately 1500 mm (59.1 in.)
        *c Approximately 500 mm (19.7 in.) *d Approximately 200 mm (7.87 in.)

    2. The operating conditions are as shown below:


      • Ignition switch is ON.

      • System is activated.

      • Shift lever is in R.

  3. DIAGNOSIS


    1. If a system malfunction is detected, the clearance warning ECU assembly stores Diagnostic Trouble Codes (DTCs) in its memory. For details, refer to the Repair Manual.