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.

        A01W1BWE04

        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.

        A01W2YWE04

        Tech Tips


        • If a frozen indication is displayed, read Precaution for LEXUS Parking Assist-sensor System first and confirm that the sensor is not covered with foreign matter 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.

  2. MALFUNCTION DISPLAY (MULTI-DISPLAY ASSEMBLY)


    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.

        A01W44LE02
        Text in Illustration
        *a When the shift lever is not in P or R *b When the shift lever is in R

        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.

        A01W3O4E02
        Text in Illustration
        *a When the shift lever is not in P or R *b When the shift lever is in R

        Tech Tips


        • If a frozen indication is displayed, read Precaution for LEXUS Parking Assist-sensor System first and confirm that the sensor is not covered with foreign matter 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 engine switch on (IG).

    2. Turn the 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 (2.36 in.) diameter pole near each sensor to measure its detection range. When measuring the longest-range detection of the front center sonar and the rear center sonar, use a wall or equivalent.

        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.

        A01W3B8E05
        Corner Sonar Detection Range
        *1 Approx. 900 mm (35.4 in.)
        *2 Approx. 600 mm (23.6 in.)
        *3 Approx. 550 mm (21.7 in.)
        *4 Approx. 200 mm (7.9 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.

        A01VZH0E01
        A01W5LZE05

    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 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 (9.3 mph) if speed is increasing

        • Less than approximately 10 km/h (6.2 mph) if speed is decreasing
        On (IG) On R -
        A01W4BRE01
        Text in Illustration
        *a Multi-information Display *b Multi-display Assembly
        *c Close-range Detection *d Medium-range Detection
        *e Long-range Detection *f When the shift lever is not in P or R
        *g When the shift lever is in R - -
        A01W08GE42

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

        • *2: When the shift lever is in 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 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 (9.3 mph) if speed is increasing

        • Less than approximately 10 km/h (6.2 mph) if speed is decreasing
        A01W3RXE01
        Text in Illustration
        *a Multi-information Display *b Multi-display Assembly
        *c Close-range Detection *d Medium-range Detection
        *e Long-range Detection *f Longest-range Detection
        A01W1U2E05

        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 Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
        On (IG) On R -
      A01W0X3E04
      Text in Illustration
      *a Multi-information Display *b Multi-display Assembly
      *c Close-range Detection *d Medium-range Detection
      *e Long-range Detection - -
      A01W08GE42

      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 Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
      On (IG) On R -
    A01W05PE04
    Text in Illustration
    *a Multi-information Display *b Multi-display Assembly
    *c Close-range Detection *d Medium-range Detection
    *e Long-range Detection *f Longest-range Detection
    A01W1U2E05

    Tech Tips

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