LEXUS 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 and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A01G89BE01

        Tech Tips


        • The example shows an open circuit in the No. 1 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.

        A01G5B4E01

        Tech Tips


        • The example shows that the No. 1 ultrasonic sensor (front left sensor) is covered with foreign matter.

        • If "Clean Park Sonar" is displayed, refer to "Frozen indication is displayed in self-check function" on Problem Symptoms Table to inspect it Click here.

  2. MALFUNCTION DISPLAY (MULTI-DISPLAY ASSEMBLY (w/ Multi-display))


    1. Open circuit indication


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

        A01G9MBE02

        Tech Tips


        • The example shows an open circuit in the No. 1 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.

        A01G9N4E02

        Tech Tips


        • The example shows that the No. 1 ultrasonic sensor (front left sensor) is covered with foreign matter.

        • If "Clean the parking assist sensor" is displayed, refer to "Frozen indication is displayed in self-check function" on Problem Symptoms Table to inspect it 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 engine switch on (IG).

    2. Turn the clearance sonar main switch on.

    3. Detection range measurement:


      1. When measuring the detection range of the front corner sonar, move the shift lever to any position other than P.

      2. When measuring the detection range of the front center sonar, move the shift lever to any position other than P or R.

      3. When measuring the detection range of the rear corner sonar and rear center sonar, move the shift lever to R.

      4. Move a 60 mm (2.4 in.) diameter pole near each sensor to measure its detection range.

        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.

        A01G82CE01

        Note

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

        A01G7Z7E03
        A01G8YSE05

    4. Front corner sonar display and buzzer operation check


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

        Operation Condition
        Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On In any position other than P or 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
        On (IG) On R -
        A01G8A3E05
        A01G62RE14

        • *5: When the shift lever is not in P or R

        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 sonar display and buzzer operation check


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

        3. Operation Condition
        Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On In any position other than P or 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
        A01G6I3E03
        A01G7OCE02

        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 sonar display and buzzer operation check


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

        4. Operation Condition
        Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On R -
      A01G9KIE03
      A01G62RE14

      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 sonar display and buzzer operation check


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

      6. Operation Condition
      Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
      On (IG) On R -
    A01G8MQE03
    A01G7OCE02

    Tech Tips

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