TOYOTA PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK


  1. CHECK INITIAL CHECK FUNCTION

    A0054Q9E05

    1. Check the initial check function for the buzzer.


      1. When the back sonar or clearance sonar switch is turned on, check that the following occurs: 1) after 0.4 seconds, the buzzer sounds for approximately 0.8 to 1.2 seconds, and 2) the system starts the obstacle detection operation.

    2. Check the initial check function for the sensor.


      • Approximately 0.4 seconds after the ignition switch is turned to ON and the back sonar or clearance sonar switch is turned on, all the sensors are checked by the system.

      • When the shift lever is operated, the system start obstacle detection operation.

    3. If the sensor is found to have an anomaly due to an open circuit, the buzzer sounds after the initial check function is completed to inform the driver and indicate which sensor is abnormal.

      A0058Q9E03

      1. When the ECU judges that the sensor needs to be repaired or cleaned:

        A0056UJE05

  2. DETECTION RANGE MEASUREMENT AND INDICATOR CHECK

    CAUTION:

    Apply the parking brake securely so that the vehicle does not move.


    1. Turn the ignition switch to ON.

    2. Turn the back sonar or clearance sonar switch on.

    3. Move the shift lever to R to check the rear corner sensors and rear center sensors.

    4. Move a pole around the sensor to measure the detection range of the sensor.

      Note


      • These detection ranges are applicable when positioning a pole with a diameter of φ60 mm (2.36 in.) parallel or perpendicular to the ground.

      • The ranges vary depending on the measuring method and type of obstacle (such as walls).

      • For close-range and medium-range detection, the values shown are for when using a pole with a diameter of 60 mm (2.36 in.). For long-range detection, the values shown are for when using walls.


      1. Sensor detection range

        A0058PUE02
        *1 Approximately 2500 mm (98.4 in.)
        *2 Approximately 80 mm (3.15 in.)
        *3 Approximately 1600 +/-150 mm (63.0 +/-5.91 in.)

    5. When the ultrasonic sensors have detected an obstacle, check that the buzzer sounds with the back sonar or clearance sonar switch on.

      Operation Condition
      Shift Lever Position Buzzer Detection

      Back LH

      Back RH

      Rear Corner LH

      Rear Corner RH
      R Sounds Sounds

      1. Check that the buzzer sounds with the back sonar or clearance sonar switch on.

        A0058WHE19
        Rear Corner Detection Range
        Detection Distance
        1. Close-range detection Within 250 +/-25 mm (9.84 +/-0.984 in.)
        2. Medium-range detection 250 +/-25 to 375 +/-37.5 mm (9.84 +/-0.984 to 14.8 +/-1.48 in.)
        3. Long-range detection 375 +/-37.5 to 450 +/-50 mm (14.8 +/-1.48 to 17.7 +/-1.97 in.)
        Rear Center Detection Range
        Detection Distance
        1. Close-range detection Within 350 +/-35 mm (13.8 +/-1.38 in.)
        2. Medium-range detection 350 +/-35 to 475 +/-47.5 mm (13.8 +/-1.38 to 18.7 +/-1.87 in.)
        3. Long-range detection 475 +/-47.5 to 675 +/-60 mm (18.7 +/-1.87 to 26.6 +/-2.36 in.)
        4. Maximum long-range detection 675 +/-60 to 1600 +/-150 mm (26.6 +/-2.36 to 63.0 +/-5.91 in.)

        Tech Tips

        Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

      2. Check the buzzer when the back sensors and rear corner sensors have detected an obstacle.

        Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Shift Lever Position
        ON On R
        Buzzer
        Detection Range Buzzer
        1. Close-range detection Sounds continuously
        2. Medium-range detection

        Sounds intermittently

        (ON: 75 msec./OFF: 75 msec.)
        3. Long-range detection

        Sounds intermittently

        (ON: 150 msec./OFF: 150 msec.)
        4. Maximum long-range detection

        Sounds intermittently

        (ON: 150 msec./OFF: 650 msec.)

        Tech Tips

        Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.