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LEXUS PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK

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  1. Self-diagnosis System


    1. If the clearance warning ECU assembly detects that an ultrasonic sensor is malfunctioning, a malfunction indication is displayed on the combination meter assembly and multi-display assembly.

      Malfunctioning Item Detection Condition

      Warning Message

      (Multi-information Display)

      Malfunction Indication

      (Combination Meter Assembly)

      Malfunction Indication

      (Multi-display Assembly)

      Buzzer Sounding

      (Multi-information Display)

      		 Suspected Area
      Frozen indication

      • The No. 1 ultrasonic sensor is covered with foreign matter, such as mud or snow

      • The No. 1 ultrasonic sensor is frozen

      		 Clean Park Sonar ○ ○ ○

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

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      • If there is no foreign matter attached to the ultrasonic sensors and their surrounding areas, check for DTCs

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      Open circuit indication

      • There is an open circuit between the clearance warning ECU assembly and the No. 1 ultrasonic sensor

      • The No. 1 ultrasonic sensor is malfunctioning

      		 Check Park Sonar System ○ ○ ○

      Check for DTCs

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      1. B00650NC01
        *a Open circuit indication *b Frozen indication

        Malfunction Indication (Combination Meter Assembly)

      2. B00686XE03

        Buzzer Sounding (No. 1 Clearance Warning Buzzer)

        Tip:

        Buzzer sounding is stopped after approximately 7.5 seconds elapsed.

  2. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note:

    Perform the following measurement and inspection 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 back sonar or clearance sonar switch assembly 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
        Rear Corner R
        Rear Center
      2. Figure 2. Rear Center Sonar Detection Range B00650ME01
        Figure 1. Corner Sonar Detection Range B006665E01

        Move a 60 mm (2.4 in.) diameter pole near each sensor to measure its detection range. When measuring the longest-range detection of the rear center sonar, 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).

        Tip:

        Have an assistant move the pole.

        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.

    4. Front corner sonar display and buzzer operation check


      1. B00655DE04
        B00652GC05
        *a Multi-information Display *b Multi-display
        *c Example (Front Corner Sonar) *d Close-range Detection
        *e Medium-range Detection *f Long-range Detection

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

        Table 1. Operation Condition
        Engine Switch Back Sonar or Clearance Sonar Switch Assembly 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 -
        Standard
        Table 2. Multi-information Display and Buzzer
        Detection Range During Judgment Obstacle

        Close-range detection

        Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)

        Buzzer: Sounds continuously

        Number of bars displayed: 1 (blinking)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 300 +/- 30 to 400 +/- 40 mm (11.8 +/- 1.18 to 15.7 +/- 1.57 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Number of bars displayed: 2 (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 400 +/- 40 to 500 +/- 50 mm (15.7 +/- 1.57 to 19.7 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)

        Number of bars displayed: 3 (illuminated)

        		 60 mm (2.4 in.) diameter pole
        Table 3. Multi-display and Buzzer
        Detection Range During Judgment Obstacle

        Close-range detection

        Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)

        Buzzer: Sounds continuously

        Color of bars displayed: Red (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 300 +/- 30 to 400 +/- 40 mm (11.8 +/- 1.18 to 15.7 +/- 1.57 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 400 +/- 40 to 500 +/- 50 mm (15.7 +/- 1.57 to 19.7 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole
        Tip:

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

    5. Rear corner sonar display and buzzer operation check


      1. B00655DE04
        B006776C01
        *a Multi-information Display *b Multi-display
        *c Example (Rear Corner Sonar) *d Close-range Detection
        *e Medium-range Detection *f Long-range Detection

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

        Table 4. Operation Condition
        Engine Switch Back Sonar or Clearance Sonar Switch Assembly Shift Lever Position Vehicle Speed
        On (IG) On R -
        Standard
        Table 5. Multi-information Display and Buzzer
        Detection Range During Judgment Obstacle

        Close-range detection

        Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)

        Buzzer: Sounds continuously

        Number of bars displayed: 1 (blinking)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 300 +/- 30 to 450 +/- 40 mm (11.8 +/- 1.18 to 17.7 +/- 1.57 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Number of bars displayed: 2 (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 450 +/- 40 to 600 +/- 50 mm (17.7 +/- 1.57 to 23.6 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)

        Number of bars displayed: 3 (illuminated)

        		 60 mm (2.4 in.) diameter pole
        Table 6. Multi-display and Buzzer
        Detection Range During Detection Obstacle

        Close-range detection

        Within approx. 300 +/- 30 mm (11.8 +/- 1.18 in.)

        Buzzer: Sounds continuously

        Color of bars displayed: Red (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 300 +/- 30 to 450 +/- 40 mm (11.8 +/- 1.18 to 17.7 +/- 1.57 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 450 +/- 40 to 600 +/- 50 mm (17.7 +/- 1.57 to 23.6 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole
        Tip:

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

    6. Rear center sonar display and buzzer operation check


      1. B00675FE02
        B00668RC01
        *a Multi-information Display *b Multi-display
        *c Example (Rear Center Sonar) *d Close-range Detection
        *e Medium-range Detection *f Long-range Detection
        *g Longest-range Detection - -

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

        Table 7. Operation Condition
        Engine Switch Back Sonar or Clearance Sonar Switch Assembly Shift Lever Position Vehicle Speed
        On (IG) On R -
        Standard
        Table 8. Multi-information Display and Buzzer
        Detection Range During Detection Obstacle

        Close-range detection

        Within approx. 350 +/- 40 mm (13.8 +/- 1.57 in.)

        Buzzer: Sounds continuously

        Number of bars displayed: 1 (blinking)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 350 +/- 40 to 450 +/- 50 mm (13.8 +/- 1.57 to 17.7 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Number of bars displayed: 2 (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 450 +/- 50 to 600 +/- 60 mm (17.7 +/- 1.97 to 23.6 +/- 2.36 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)

        Number of bars displayed: 3 (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Longest-range detection

        From approx. 600 +/- 60 to 1500 +/- 150 mm (23.6 +/- 2.36 to 59.1 +/- 5.91 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.)

        Number of bars displayed: 4 (illuminated)

        		 Wall
        Table 9. Multi-display and Buzzer
        Detection Range During Detection Obstacle

        Close-range detection

        Within approx. 350 +/- 40 mm (13.8 +/- 1.57 in.)

        Buzzer: Sounds continuously

        Color of bars displayed: Red (illuminated)

        		 60 mm (2.4 in.) diameter pole

        Medium-range detection

        From approx. 350 +/- 40 to 450 +/- 50 mm (13.8 +/- 1.57 to 17.7 +/- 1.97 in.)

        Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole

        Long-range detection

        From approx. 450 +/- 50 to 600 +/- 60 mm (17.7 +/- 1.97 to 23.6 +/- 2.36 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec./ OFF: 0.15 sec.)

        Color of bars displayed: Yellow (blinking)

        		 60 mm (2.4 in.) diameter pole

        Longest-range detection

        From approx. 600 +/- 60 to 1500 +/- 150 mm (23.6 +/- 2.36 to 59.1 +/- 5.91 in.)

        Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.)

        Color of bars displayed: Yellow (blinking)

        		 Wall
        Tip:

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