LEXUS PARKING ASSIST-SENSOR SYSTEM > OPERATION CHECK

for Preparation Click here



SELF-CHECK FUNCTION INSPECTION (INITIAL CHECK)
E180116E04

  1. Turn the power switch on (IG).

  2. Turn the LEXUS parking assist-sensor system off, or check that the LEXUS parking assist-sensor system is off.

  3. Turn the power switch off.

  4. Turn the power switch on (IG).

  5. Turn the LEXUS parking assist-sensor system on, and check that the following occurs:
    1) After approximately 0.1 seconds, the buzzer sounds for approximately 1 second.
    2) The system starts detection operation mode.

    HINT:
    1. During the initial check, the malfunction detection operates and obstacle detection does not operate.
    2. In detection operation mode, obstacle detection and malfunction detection operate.
    3. If a sensor has an open circuit or a sensor malfunctions because it is wet or frozen, a malfunction display is shown in the multi-information display, and the buzzer sounds.
    4. If the power switch is turned on (IG) while the LEXUS parking assist-sensor system is on, the buzzer does not sound even though malfunction detection operates.

    Text in Illustration 
    *a
    		Power Switch
    *b
    		LEXUS Parking Assist-sensor System
    *c
    		Buzzer Sound
    *d
    		Approx. 2 sec.
    *e
    		Approx. 1 sec.
    *f
    		Detection Operation Mode


MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)


  1. 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.


      E222379E01

      HINT:
      1. The example shows an open circuit in the ultrasonic sensor (front left sensor).
      2. 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.


      E222380E01

      HINT:
      1. The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.
      2. If "CLEAN SONAR" is displayed, refer to "Frozen indication is displayed in self-check function" on the Problem Symptoms Table to inspect it (Click here).


MALFUNCTION DISPLAY (MULTI-DISPLAY)


  1. Ultrasonic sensor open circuit



    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.


      E183831E07

      HINT:
      1. This example shows an open circuit in the ultrasonic sensor (rear right sensor).
      2. If a sensor has an open circuit, refer to "Open circuit is displayed during self-check function" on Problem Symptoms Table to inspect it.



  2. Ultrasonic sensor frozen



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


      E183832E06

      HINT:
      1. The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.
      2. If "Clean Sonar" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.


DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

  1. Detection range measurement:

    NOTICE:
    Make sure that the vehicle does not move by applying the parking brake firmly.


    1. Turn the power switch on (READY).

    2. Move the shift lever to R to check the ultrasonic sensors.

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



  3. Move a 60 mm (2.36 in.) diameter pole near each sensor to measure its detection range.

    NOTICE:
    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).

    HINT:
    Have an assistant move the pole.




    1. Clearance Sonar


      E221354E01

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



    2. Back Sonar


      E221355E01



  4. When the ultrasonic sensors (front corner sonar) have detected an obstacle, check the displays and check that the buzzer sounds.

    Operation Condition 
    Power Switch
    		LEXUS Parking Assist-sensor System
    		Shift State
    		Vehicle Speed
    On (READY)
    		On
    		Other than Park (P)
    1. Less than 15 km/h (9.3 mph) if speed is increasing
    2. Less than 10 km/h (6.2 mph) if speed is decreasing


    E180123E07


    Standard:

    Multi-information Display and Buzzer 
    Detection Range
    		During Judgment
    		Obstacle
    *1
    Close-range detection
    Within approx. 250 +/- 50 mm (9.84 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (blinking)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 250 +/- 50 to 375 +/- 50 mm (9.84 +/- 1.97 to 14.76 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    Number of bars displayed: 2 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 375 +/- 50 to 500 +/- 50 mm (14.76 +/- 1.97 to 19.69 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)
    Number of bars displayed: 3 (illuminated)
    		60 mm (2.36 in.) diameter pole

    Multi-display and Buzzer 
    Detection Range
    		During Judgment
    		Obstacle
    *1
    Close-range detection
    Within approx. 250 +/- 50 mm (9.84 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    *4: Red (illuminated)
    *5: Number of bars displayed: 1 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 250 +/- 50 to 375 +/- 50 mm (9.84 +/- 1.97 to 14.76 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    *4: Yellow (blinking)
    *5: Number of bars displayed: 2 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 375 +/- 50 to 500 +/- 50 mm (14.76 +/- 1.97 to 19.69 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)
    *4: Yellow (blinking)
    *5: Number of bars displayed: 3 (illuminated)
    		60 mm (2.36 in.) diameter pole

    *5: When a shift state other than park (P) or reverse (R) has been selected

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



  5. When the ultrasonic sensors (rear corner sonar) have detected an obstacle, check the displays and check that the buzzer sounds.

    Operation Condition 
    Power Switch
    		LEXUS Parking Assist-sensor System
    		Shift State
    		Vehicle Speed
    On (READY)
    		On
    		Reverse (R)
    		-


    E180124E08


    Standard:

    Multi-information Display and Buzzer 
    Detection Range
    		During Judgment
    		Obstacle
    *1
    Close-range detection
    Within approx. 250 +/- 50 mm (9.84 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (blinking)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 250 +/- 50 to 375 +/- 50 mm (9.84 +/- 1.97 to 14.76 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    Number of bars displayed: 2 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 375 +/- 50 to 500 +/- 50 mm (14.76 +/- 1.97 to 19.69 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)
    Number of bars displayed: 3 (illuminated)
    		60 mm (2.36 in.) diameter pole

    Multi-display and Buzzer 
    Detection Range
    		During Judgment
    		Obstacle
    *1
    Close-range detection
    Within approx. 250 +/- 50 mm (9.84 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    *4: Red (illuminated)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 250 +/- 50 to 375 +/- 50 mm (9.84 +/- 1.97 to 14.76 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    *4: Yellow (blinking)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 375 +/- 50 to 500 +/- 50 mm (14.76 +/- 1.97 to 19.69 +/- 1.97 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)
    *4: Yellow (blinking)
    		60 mm (2.36 in.) diameter pole

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



  6. When the ultrasonic sensors (back sonar) have detected an obstacle, check the displays and check that the buzzer sounds.

    Operation Condition 
    Power Switch
    		LEXUS Parking Assist-sensor System
    		Shift State
    		Vehicle Speed
    On (READY)
    		On
    		Reverse (R)
    		-


    E180125E08


    Standard:

    Multi-information Display and Buzzer 
    Detection Range
    		During Detection
    		Obstacle
    *1
    Close-range detection
    Within approx. 350 +/- 50 mm (13.78 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    Number of bars displayed: 1 (blinking)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 350 +/- 50 to 450 +/- 100 mm (13.78 +/- 1.97 to 17.72 +/- 3.94 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    Number of bars displayed: 2 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 450 +/- 100 to 600 +/- 100 mm (17.72 +/- 3.94 to 23.62 +/- 3.94 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.15 sec.)
    Number of bars displayed: 3 (illuminated)
    		60 mm (2.36 in.) diameter pole
    *4
    Longest-range detection
    From approx. 600 +/- 100 to 1500 +/- 150 mm (23.62 +/- 3.94 to 59.06 +/- 5.91 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.)
    Number of bars displayed: 4 (illuminated)
    		Wall

    Multi-display and Buzzer 
    Detection Range
    		During Detection
    		Obstacle
    *1
    Close-range detection
    Within approx. 350 +/- 50 mm (13.78 +/- 1.97 in.)
    		Buzzer: Sounds continuously
    *5: Red (illuminated)
    		60 mm (2.36 in.) diameter pole
    *2
    Medium-range detection
    From approx. 350 +/- 50 to 450 +/- 100 mm (13.78 +/- 1.97 to 17.72 +/- 3.94 in.)
    		Buzzer: Sounds intermittently (ON: 0.075 sec. / OFF: 0.075 sec.)
    *5: Yellow (blinking)
    		60 mm (2.36 in.) diameter pole
    *3
    Long-range detection
    From approx. 450 +/- 100 to 600 +/- 100 mm (17.72 +/- 3.94 to 23.62 +/- 3.94 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec./ OFF: 0.15 sec.)
    *5: Yellow (blinking)
    		60 mm (2.36 in.) diameter pole
    *4
    Longest-range detection
    From approx. 600 +/- 100 to 1500 +/- 150 mm (23.62 +/- 3.94 to 59.06 +/- 5.91 in.)
    		Buzzer: Sounds intermittently (ON: 0.15 sec. / OFF: 0.65 sec.)
    *5: Yellow (blinking)
    		Wall

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