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, 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.

        B002JBEE01

        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 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.

        B002KCCE01

        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 returns to normal.

  2. MALFUNCTION DISPLAY (MULTI-DISPLAY)


    1. Open circuit indication


      1. If there is an open circuit between the 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.

        B002JY9C01
        *A w/ Panoramic View Monitor System - -
        *a When panoramic view monitor system operates *b When parking assist monitor system operates
        *c 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.

        B002JPYC01
        *A w/ Panoramic View Monitor System - -
        *a When panoramic view monitor system operates *b When parking assist monitor system operates
        *c 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
        Front Center In any position other than P or R
        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

        B002IG1E02
        *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. Front Center Sensor Detection Range

        B002JAYE02

        Figure 3. Rear Center Sensor Detection Range

        B002HHAE02

    4. Front center sensor display and buzzer operation check


      1. When the No. 1 ultrasonic sensors (front center sensor) have detected an obstacle, check the display 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
        B002H3PE02
        B002IDWE03

        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 sensor display and buzzer operation check


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

        3. 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 -
        B002KJQE02
        B002JGTE07

        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 sensor display and buzzer operation check


        1. When the No. 3 ultrasonic sensors (rear corner 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 -
      B002IOME02
      B002JGTE08

      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 sensor display and buzzer operation check


      1. When the No. 4 ultrasonic sensors (rear center sensor) have detected an obstacle, check the display and check that the buzzer sounds.

      6. Operation Condition
      Power switch Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
      On (IG) On R -
    B002II7E02
    B002IDWE04

    Tech Tips

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