TOYOTA PARKING ASSIST-SENSOR SYSTEM (for 8 Sensor Type) OPERATION CHECK


  1. SELF-CHECK FUNCTION INSPECTION (INITIAL CHECK)

    A0098YJE02

    1. Turn the ignition switch to ON.

    2. Turn the TOYOTA parking assist-sensor system off, or check that the TOYOTA parking assist-sensor system is off.

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON.

    5. Turn the TOYOTA parking assist-sensor system on and check that the following occurs:

      1) After approximately 0.1 seconds, the buzzer sounds for approximately 1 second.

      2) 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 TOYOTA parking assist-sensor system is 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*1 or parking assist ECU*2, or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.


        • *1: w/o Parking Assist Monitor System and/or Side Monitor System

        • *2: w/ Parking Assist Monitor System and/or Side Monitor System

        A009BHHE01

        Tech Tips


        • The example shows an open circuit in the ultrasonic sensor (front left sensor).

        • 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.

        A0096IQE03

        Tech Tips


        • The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.

        • If "CLEAN SONAR" is displayed, refer to "Frozen indication is displayed in self-check function" in the Problem Symptoms Table to inspect the problem 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 TOYOTA parking assist-sensor system 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

        A009BZTE01

      2. Detection range of front corner sensors

        A00951DE01

      3. Detection range of rear corner sensors

        A0097I2E01

      4. Detection range of rear corner sensors

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


      1. Front corner sensors

        Operation Condition
        Ignition Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed
        ON On In any position except P

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

        • Less than 10 km/h (6.2 mph) if speed is decreasing
        A009982E05

        *5: When shift lever in D

        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

        3. Operation Condition
        Ignition Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed
        ON On except P, R -
        A00960IE03

        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 TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed
        ON On R -
      A0099Q6E04

      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 TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed
      ON On R -
    A0099FCE04

    Tech Tips

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