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


  1. SELF-CHECK FUNCTION INSPECTION (INITIAL CHECK)

    B001H4TE01
    *1 Ignition Switch:
    *2 On
    *3 Off
    *4 Main Switch Operation:

    1. Turn the ignition switch to ON.

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

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON.

    5. Turn the back sonar or clearance sonar switch on and check that the following occurs:

      1) The system starts detection operation mode.

      Tech Tips


      • During the initial check, malfunction detection operates and obstacle detection does not operate.

      • In the detection operation mode, obstacle detection and malfunction detection operate.

      • If a sensor has an open circuit or a sensor malfunctions because it is wet or frozen, a malfunction display is shown in the multi-information display and the buzzer sounds.

      • If the ignition switch is turned to ON while the back sonar or clearance sonar switch on, the buzzer does not sound even though the malfunction detection operates.

  2. MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)


    1. Open circuit indication


      1. If there is an open circuit between the ultrasonic sensor and the clearance warning ECU, or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        B001F0KE01

        Tech Tips


        • If a sensor has an open circuit, check for DTCs and troubleshoot according to each inspection procedure Click here.

    2. Frozen indication


      1. If a sensor is covered with foreign matter, such as mud or snow, the affected sensor is displayed as shown in the illustration.

        B001DPRE01

        Tech Tips

        If a sensor has an open circuit, check for DTCs and troubleshoot according toeach inspection procedure Click here.

  3. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION


    1. Detection range measurement:

      Note

      Make sure that the vehicle does not move by applying the parking brake firmly.


      1. Turn the ignition switch to ON.

      2. Move the shift lever to R to check the ultrasonic sensors.

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

    3. Move a φ 60 mm (2.36 in.) pole near each sensor to measure its detection range.

      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. Detection range of front corner sensors (for 8 Sensor Type)

        B001HTKE04

      2. Detection range of front center sensors (for 8 Sensor Type)

        B001D0QE03

      3. Detection range of rear center sensors

        B001HK7E04

      4. Detection range of rear corner sensors

        B001F2FE04

    4. Check the displays and buzzer sounds when the ultrasonic sensors detect an obstacle.


      1. Front corner sensors (for 8 Sensor Type)

        Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Shift Lever Position* Vehicle Speed
        ON ON In any position except P

        • Less than approximately 15 km/h (9.3 mph) if speed is increasing

        • Less than approximately 10 km/h (6.2 mph) if speed is decreasing

        *: for Automatic Transmission

        B001EOGE04

        Tech Tips

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

      2. Front center sensors (for 8 Sensor Type)

        3. Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Shift Lever Position Vehicle Speed
        ON ON except P*, R

        • Less than approximately 15 km/h (9.3 mph) if speed is increasing

        • Less than approximately 10 km/h (6.2 mph) if speed is decreasing

        *: for Automatic Transmission

        B001ELAE05

        Tech Tips

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

      3. Rear corner sensors

        4. Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Shift Lever Position Vehicle Speed
        ON ON R -
      B001DKHE04

      • *4: When shift lever in R

      Tech Tips

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

    5. Rear center sensors

      6. Operation Condition
      Ignition Switch Back Sonar or Clearance Sonar Switch Shift Lever Position Vehicle Speed
      ON ON R -
    B001GZYE04

    • *5: When shift lever in R

    Tech Tips

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