LEXUS PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK


  1. INITIAL CHECK


    1. Power switch on (IG) (LEXUS parking assist-sensor system off).

    2. LEXUS parking assist-sensor system on and check an indication state of the vehicle mark.

      Tech Tips


      • During the initial check, only malfunction detection is performed. Obstacle detection is not performed.

      • When the power switch is turned on (IG) with the LEXUS parking assist-sensor system on, malfunction detection is performed, but the buzzer does not sound.

      • A frozen indication is displayed if the ultrasonic sensor is frozen.

      • If an open circuit occurs in an ultrasonic sensor circuit or a malfunction is detected in a sensor (ultrasonic sensor), an open circuit indication is displayed.

    3. MALFUNCTION DISPLAY (COMBINATION METER ASSEMBLY [MULTI-INFORMATION DISPLAY])


      1. 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.

          B000Q76E01

          Tech Tips


          • [A] in the illustration indicates the sensor frozen display icon, and [B] indicates the vehicle icon.

          • Check if any foreign matter is attached to the ultrasonic sensors and their surrounding areas

            Click here

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

            Click here

          • Buzzer sounding is stopped after approximately 7.5 seconds elapsed.

      2. 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.

          B000PMVE01

          Tech Tips


          • [A] in the illustration indicates the sensor open circuit display icon, and [B] indicates the vehicle icon.

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

            Click here

          • Buzzer sounding is stopped after approximately 7.5 seconds elapsed.

      3. Communication malfunction indication


        1. B000RX3

          When a CAN communication malfunction occurs between the radio receiver assembly, hybrid vehicle control ECU assembly, combination meter assembly, headup display (meter mirror sub-assembly)* and clearance warning ECU assembly, they are displayed in the same way as shown in the illustration.

          *: w/ Headup Display

    4. MALFUNCTION DISPLAY (MULTI-DISPLAY)


      1. Frozen indication


        1. B000NU1C01
      5. *a When parking assist monitor system operates
      *A for RHD
      *B for LHD

If a sensor is covered with foreign matter, such as mud or snow, the affected sensor is displayed as shown in the illustration.

Tech Tips

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

Click here

  • Open circuit indication


    1. B000Q4OC01
      *a When parking assist monitor system operates
      *A for RHD
      *B for LHD

      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.

      Tech Tips

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

      Click here

  • Communication malfunction indication


    1. B000S2CC01
      *a When parking assist monitor system operates
      *A for RHD
      *B for LHD

      When a CAN communication malfunction occurs between the radio receiver assembly, hybrid vehicle control ECU assembly, combination meter assembly, headup display (meter mirror sub-assembly)* and clearance warning ECU assembly, they are displayed in the same way as shown in the illustration.

      *: w/ Headup Display

  • DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note

    Perform the following measurement and inspection with the shift position in a position other than P. 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 (READY).

    2. Turn the LEXUS parking assist-sensor system on.

    3. Detection range measurement:


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

        Measurement Area Shift Position
        Front Corner Sensor (front corner ultrasonic sensor) In any position other than P
        Front Center Sensor (front center ultrasonic sensor) In any position other than P or R
        Rear Corner Sensor (rear corner ultrasonic sensor) R
        Rear Center Sensor (rear center ultrasonic sensor)

      2. Move a 60 mm (2.4 in.) diameter pole near each sensor (except the front center sensor) and use a 400 mm (15.7 in.) pole to measure the detection range. When measuring the 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.) and 400 mm (15.7 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. Front Corner Sensor and Rear Corner Sensor Detection Range

        B000TKVE02

        Note

        The front corner sensor and rear corner 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

        B000ONBE02

        Figure 3. Rear Center Sensor Detection Range

        B000PYPE02

    4. Front corner sensor display and buzzer operation check


      1. When the front corner ultrasonic sensor (front corner sensor) have detected an obstacle, check the displays and check that the buzzer sounds.

        Operation Condition
        Power Switch LEXUS Parking Assist-sensor System Shift Position Vehicle Speed*
        On (READY) On In any position other than P

        • 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

        • *: When the shift position is R, the system operates at any vehicle speed.

        B000PRTC01
        *A w/ Headup Display - -
        *a Front Corner Sensor Display *b Combination Meter Assembly
        *c Headup Display (Meter Mirror Sub-assembly) *d Multi-display
        B000P72E42

        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 sensor display and buzzer operation check


        1. When the front center ultrasonic sensor (front center sensor) have detected an obstacle, check the display and check that the buzzer sounds.

        3. Operation Condition
        Power Switch LEXUS Parking Assist-sensor System Shift Position Vehicle Speed
        On (READY) 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
        B000T6VC01
        *A w/ Headup Display - -
        *a Front Center Sensor Display *b Combination Meter Assembly
        *c Headup Display (Meter Mirror Sub-assembly) *d Multi-display
        B000PYDE07

        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 rear corner ultrasonic sensor (rear corner sensor) have detected an obstacle, check the display and check that the buzzer sounds.

        4. Operation Condition
        Power Switch LEXUS Parking Assist-sensor System Shift Position Vehicle Speed
        On (READY) On R -
      B000PM7C01
      *A w/ Headup Display - -
      *a Rear Corner Sensor Display *b Combination Meter Assembly
      *c Headup Display (Meter Mirror Sub-assembly) *d Multi-display
      B000P72E42

      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 rear center ultrasonic sensor (rear center sensor) have detected an obstacle, check the display and check that the buzzer sounds.

      6. Operation Condition
      Power Switch LEXUS Parking Assist-sensor System Shift Position Vehicle Speed
      On (READY) On R -
    B000OIJC01
    *A w/ Headup Display - -
    *a Rear Center Sensor Display *b Combination Meter Assembly
    *c Headup Display (Meter Mirror Sub-assembly) *d Multi-display
    B000PYDE07

    Tech Tips

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