TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/o Multi-display) OPERATION CHECK


  1. CHECK INITIAL CHECK FUNCTION


    1. 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 starts the obstacle detection operation.

    2. If a 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.


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

        B001CV2E09

      2. When the ECU determines that the sensor needs to be cleaned:

        B001FTUE08

        Tech Tips

        If the clearance sonar switch is on and the ignition switch is turned to ON, the buzzer does not sound.

  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 60 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.

      • The No. 1 ultrasonic sensor side view detection range hatched area*1 represents the cross section of the top view of the detection range along the lines labeled A. The hatched area*1 does not represent the entire side view detection range.


      1. Rear corner sensor detection range

        B001F2FE03

      2. Rear center sensor detection range

        B001HK7E03

    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 Operation

      Rear Center Sensor LH

      Rear Center Sensor RH

      Rear Corner Sensor LH

      Rear Corner Sensor RH
      R Sounds Sounds

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

        B001FPEE20
        Rear Corner Detection Range
        Detection Distance
        1. Close-range detection Within 300 +/-30 mm (11.8 +/-1.18 in.)
        2. Medium-range detection 300 +/-30 to 400 +/-40 mm (11.8 +/-1.18 to 15.7 +/-1.57 in.)
        3. Long-range detection 400 +/-40 to 500 +/-60 mm (15.7 +/-1.57 to 19.7 +/-2.36 in.)
        Rear Center Detection Range
        Detection Distance
        1. Close-range detection Within 400 +/-40 mm (15.7 +/-1.57 in.)
        2. Medium-range detection 400 +/-40 to 500 +/-50 mm (15.7 +/-1.57 to 19.7 +/-1.97 in.)
        3. Long-range detection 500 +/-50 to 650 +/-70 mm (19.7 +/-1.97 to 25.6 +/-2.76 in.)
        4. Maximum long-range detection 650 +/-70 to 1500 +/-150 mm (25.6 +/-2.76 to 59.1+/-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 indicator and buzzer when the rear center 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: Approximately 0.1 seconds./Off: Approximately 0.1 seconds.)
        3. Long-range detection

        Sounds intermittently

        (On: Approximately 0.2 seconds./Off: Approximately 0.2 seconds.)
        4. Maximum long-range detection

        Sounds intermittently

        (On: Approximately 0.5 seconds./Off: Approximately 0.5 seconds.)
        Clearance Warning Indicator
        Detection Range Indicator Displayed
        1. Close-range detection Corner indicator(s) are illuminated and/or back indicator is illuminated
        2. Medium-range detection Corner indicator(s) are blinking and/or back indicator is blinking
        3. Long-range detection Corner indicator(s) are blinking and/or back indicator is blinking
        4. Maximum long-range detection Back indicator is blinking
        B001DM5E03
        Text in Illustration
        *1 Clearance warning indicator - -
        *a Corner indicator *b Back indicator

        Tech Tips

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