TOYOTA PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK


  1. MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)


    1. Open circuit indication


      1. If there is an open circuit between a No. 1 ultrasonic sensor, No. 2 ultrasonic sensor, No. 3 ultrasonic sensor or No. 4 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A01MGBBE01

        Tech Tips


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

          Click here

        • Buzzer sounding stops at 5 cycles. Also, blinking of (A) indicator stops, after the system returns to normal.

    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.

        A01MJGGE01

        Tech Tips


        • If a frozen indication is displayed, proceed to "Sensor Frozen Indication (Dirty or Frozen)".

          Click here

        • Buzzer sounding stops at 5 cycles. Also, blinking of (A) indicator stops, after the system returns to normal.

  2. MALFUNCTION DISPLAY (NAVIGATION RECEIVER ASSEMBLY)


    1. Open circuit indication


      1. If there is an open circuit between the No. 1 ultrasonic sensor or No. 2 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A01MGK8C01
        *a When TOYOTA parking assist-sensor system operates. *b When full screen displays.

        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.

        A01MFHZC01
        *a When TOYOTA parking assist-sensor system operates. *b When full screen displays.

        Tech Tips


        • If a frozen indication is displayed, proceed to "Sensor Frozen Indication (Dirty or Frozen)".

          Click here

        • Check for DTCs and troubleshoot according to each inspection procedure after confirming that the sensor is not covered with foreign matter.

          Click here

  3. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note

    The following measurement and inspection will be performed with the shift lever in a position other than P. Be sure to apply the parking lever and depress the brake pedal firmly to prevent the vehicle from moving.


    1. Turn the power switch on (IG).

    2. Turn the combination switch assembly (clearance sonar main switch) on.

    3. Detection range measurement:


      1. Move the shift lever according to the table below.

        Measurement Area Shift Lever Position
        Front Corner In any position other than P
        Rear Corner R
        Rear Center

      2. Move a 60 mm (2.4 in.) diameter pole near each sensor to measure its detection range. When measuring the *4: Longest-range detection of the front center sensor and the rear center sensor, use a wall or equivalent.

        Note

        These detection ranges are applicable when positioning the 60 mm (2.4 in.) diameter pole parallel or perpendicular to the ground. The detection range varies depending on the measuring method and type of obstacle (such as walls).

        Tech Tips

        Have an assistant move the pole.

        Figure 1. Corner Sensor Detection Range

        A01MIIZE01
        *1 Approximately 900 mm (35.43 in.)
        *2 Approximately 600 mm (23.62 in.)
        *3 Approximately 550 mm (21.65 in.)
        *4 Approximately 200 mm (7.87 in.)

        Note

        The No. 1 ultrasonic sensor side view detection range (hatched area labeled (B)) represents the cross section of the top view detection range (A). The hatched area (B) does not represent the entire side view detection range.

        Figure 2. Rear Center Sensor Detection Range

        A01MHANE01

    4. Front corner sensor display and buzzer operation check


      1. When the No. 1 ultrasonic sensors (front corner sensor) have detected an obstacle, check the displays and check that the buzzer sounds.

        Operation Condition
        Power switch Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
        On (IG) On In any position other than P or R

        • Less than approximately 15 km/h (9 mph) if speed is increasing

        • Less than approximately 10 km/h (6 mph) if speed is decreasing
        On (IG) On R -
        A01MIFFE01
        A01MJMNE07

        Tech Tips

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

      2. Rear corner sensor display and buzzer operation check


        1. When the No. 2 ultrasonic sensors (rear corner sensor) have detected an obstacle, check the display and check that the buzzer sounds.

        3. Operation Condition
        Power switch Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
        On (IG) On R -
        A01MJ4YE01
        A01MJMNE07

        Tech Tips

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

      3. Rear center sensor display and buzzer operation check


        1. When the No. 2 ultrasonic sensors (rear center sensor) have detected an obstacle, check the display and check that the buzzer sounds.

        4. Operation Condition
        Power switch Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
        On (IG) On R -
      A01MGBSE01
      A01MGO9E05

      Tech Tips

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