TOYOTA PARKING ASSIST-SENSOR SYSTEM(except Hatchback) OPERATION CHECK


  1. 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 assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A013A8AE02

        Tech Tips


        • When a malfunction is detected, bars for all detection areas shown in the illustration blink.

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

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  2. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note

    The following measurement and inspection will be performed with a shift state other than park (P) selected. Be sure to apply the parking brake and depress the brake pedal firmly to prevent the vehicle from moving.


    1. Turn the power switch on (IG).

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

    3. Detection range measurement:


      1. When measuring the detection range of the front sonar, move the shift lever to select a shift state other than park (P).

      2. When measuring the detection range of the rear sonar, move the shift lever to reverse (R).

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

        Note

        These detection ranges are applicable when positioning the 60 mm (2.36 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 Sonar

        A013A0JC02
        *a Approx. 500 mm (19.7 in.) *b Approx. 650 mm (25.6 in.)
        *c Approx. 550 mm (21.7 in.) *d Approx. 100 mm (3.9 in.)
        *e A *f B

        Note

        The ultrasonic sensor side view detection range (hatched area labeled (B)) represents the cross section of the top view detection range (A). The hatched area (A) does not represent the entire side view detection range.

        Figure 2. Center Sonar

        A0139X2C01
        *a Approx. 1000 mm (39.4 in.) *b Approx. 1500 mm (59.1 in.)
        *c Approx. 650 mm (25.6 in.) *d Approx. 100 mm (3.9 in.)
        *e Wall - -

        Figure 3. Front Side Sonar

        A013A5VC01
        *a Approx. 250 mm (9.8 in.) *b Approx. 400 mm (15.7 in.)
        *c Approx. 100 mm (3.9 in.) - -

    4. Front side sonar display and buzzer operation check


      1. When the No. 1 ultrasonic sensors (front side LH/RH) have detected an obstacle, check the displays and check that the No. 1 clearance warning buzzer sounds.

        Operation Condition
        Power Switch Back Sonar or Clearance Sonar Switch Assembly Shift State Vehicle Speed
        On (IG) On Other than park (P) or reverse (R) Less than 10 km/h (6 mph)
        On (IG) On Reverse (R) -
        A013AM5E01

        Tech Tips

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

      2. Front corner sonar display and buzzer operation check


        1. When the No. 2 ultrasonic sensors (front corner LH/RH) have detected an obstacle, check the displays and check that the No. 1 clearance warning buzzer sounds.

        3. Operation Condition
        Power Switch Back Sonar or Clearance Sonar Switch Assembly Shift State Vehicle Speed
        On (IG) On Other than park (P) or reverse (R) Less than 10 km/h (6 mph)
        On (IG) On Reverse (R) -
        A0139PQE02

        Tech Tips

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

      3. Front center sonar display and buzzer operation check


        1. When the No. 2 ultrasonic sensors (front center LH/RH) have detected an obstacle, check the display and check that the No. 1 clearance warning buzzer sounds.

        4. Operation Condition
        Power Switch Back Sonar or Clearance Sonar Switch Assembly Shift State Vehicle Speed
        On (IG) On Other than park (P) or reverse (R) Less than 10 km/h (6 mph)
        On (IG) On Reverse (R) -
      A013AM7E02

      Tech Tips

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


      • *1: While the simple intelligent parking assist system is not operating

      • *2: While the simple intelligent parking assist system is operating

    5. Rear corner sonar display and buzzer operation check


      1. When the No. 4 ultrasonic sensors (rear corner LH/RH) have detected an obstacle, check the display and check that the No. 2 clearance warning buzzer sounds.

      6. Operation Condition
      Power Switch Back Sonar or Clearance Sonar Switch Assembly Shift State Vehicle Speed
      On (IG) On Reverse (R) -
    A0139NFE02

    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 sonar display and buzzer operation check


    1. When the No. 4 ultrasonic sensors (rear center LH/RH) have detected an obstacle, check the display and check that the No. 2 clearance warning buzzer sounds.

    4. Operation Condition
    Power Switch Back Sonar or Clearance Sonar Switch Assembly Shift State Vehicle Speed
    On (IG) On Reverse (R) -
A013A5YE02

Tech Tips

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