TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan)


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    No. 1/No. 3 Ultrasonic Sensor (8)*1 Detects the distance between the vehicle and an obstacle.
    No. 1/No. 2/No. 3 Ultrasonic Sensor (10)*2
    No. 1 Clearance Warning Buzzer (Front) Sounds to inform the driver according to the distance to the obstacle.
    No. 2 Clearance Warning Buzzer (Rear)
    Combination Meter Assembly 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.
    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.
    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 multi-information display.

    • Sounds the No. 1 or No. 2 clearance warning buzzer.
    Air Conditioning Amplifier Assembly Sends outside temperature information to the clearance warning ECU assembly to adjust the distance rate from the ultrasonic sensors.
    Main Body ECU (Multiplex Network Body ECU) Sends the parking brake signal to the clearance warning ECU assembly.*3
    ECM Transmits the shift position signals to the clearance warning ECU assembly.*4

    Brake Actuator Assembly

    - Skid Control ECU

    		 Sends the wheel speed signal to the clearance warning ECU assembly.
    Back-up Light Switch Assembly*3 Sends the shift position signals to the clearance warning ECU assembly.
    Park/Neutral Position Switch Assembly*4 Sends the shift position signals to the ECM.

    *1: Except Models with simple intelligent parking assist system

    *2: Models with simple intelligent parking assist system

    *3: Models with manual transaxle or multi-mode manual transaxle

    *4: Models with multidrive/continuously variable transaxle

  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. Corners

        A01KV3NC01
        *a Approximately 500 mm (19.7 in.) *b Approximately 650 mm (25.6 in.)
        *c Approximately 550 mm (21.7 in.) *d Approximately 100 mm (3.9 in.)

        Figure 2. Center

        A01KVDCC01
        *a Approximately 1000 mm (39.4 in.) *b Approximately 1500 mm (59.1 in.)
        *c Approximately 650 mm (25.6 in.) *d Approximately 100 mm (3.9 in.)

        Figure 3. Sides (Models with simple intelligent parking assist system)

        A01KVD5C01
        *a Approximately 250 mm (9.8 in.) *b Approximately 400 mm (15.7 in.)
        *c Approximately 100 mm (3.9 in.) - -

    2. The operating condition of each sensor differs according to its installed position as shown in the table below:

      Installation Position Operating Condition
      Front Corner

      • Ignition switch is ON.

      • System is activated.*2

      • Parking brake switch assembly is off.*3

      • Shift lever is in a position other than P.*4

      • Vehicle speed is approximately 10 km/h (6 mph) or less.
      Front Center
      Front Side*1
      Rear Corner

      • Ignition switch is ON.

      • System is activated.*2

      • Back-up light switch is on.*3

      • Shift lever is in R.*4
      Rear Center

      *1: Models with simple intelligent parking assist system

      *2: Even if the back sonar or clearance sonar switch assembly is off, the system is activated when the simple-intelligent parking assist system is operating.

      *3: Models with manual transaxle or multi-mode manual transaxle

      *4: Models with multidrive/continuously variable transaxle

  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.