LEXUS PARKING ASSIST-SENSOR SYSTEM(w/o Intelligent Clearance Sonar System) OPERATION CHECK


  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, accessory meter assembly*1 and multi-display assembly*2.


      • *1: for 12.3 Inch Display

      • *2: for 8 Inch Display

      Malfunctioning Item Detection Condition

      Warning Message

      (Multi-information Display)

      Malfunction Indication

      (Combination Meter Assembly)

      Malfunction Indication

      (Accessory Meter Assembly*1 or Multi-display Assembly*2)

      Buzzer Sounding

      (No. 1 Clearance Warning Buzzer)

      		 Suspected Area
      Frozen indication

      • The No. 1 ultrasonic sensor, No. 2 ultrasonic sensor, No. 3 ultrasonic sensor or No. 4 ultrasonic sensor is covered with foreign matter, such as mud or snow

      • The No. 1 ultrasonic sensor, No. 2 ultrasonic sensor, No. 3 ultrasonic sensor or No. 4 ultrasonic sensor is frozen

      		 Clean Parking Assist Sensor ○ ○ ○

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

        Click here

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

        Click here

      Open circuit indication

      • There is an open circuit between the clearance warning ECU assembly and the No. 1 ultrasonic sensor, No. 2 ultrasonic sensor, No. 3 ultrasonic sensor or No. 4 ultrasonic sensor

      • The No. 1 ultrasonic sensor, No. 2 ultrasonic sensor, No. 3 ultrasonic sensor or No. 4 ultrasonic sensor is malfunctioning

      		 Parking Assist Malfunction ○ ○ ○

      Check for DTCs

      Click here


      • *1: for 12.3 Inch Display

      • *2: for 8 Inch Display


      1. Malfunction Indication (Combination Meter Assembly)

        B005MTRC01
        *a Open circuit indication *b Frozen indication

      2. Malfunction Indication (Accessory Meter Assembly (for 12.3 Inch Display))

        B005MWWC01
        *a Frozen indication *b Open circuit indication
        *c When panoramic view screen is displayed *d When side screen is displayed

      3. Malfunction Indication (Multi-display Assembly (for 8 Inch Display))

        B005O77C01
        *a Frozen indication *b Open circuit indication
        *c When panoramic view screen is displayed *d When panoramic view monitor system (panoramic view screen not displayed) or parking assist monitor system operates
        *e When full screen is displayed - -

      4. Buzzer Sounding (No. 1 Clearance Warning Buzzer)

        B005QE3E03

        Tech Tips

        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 brake and depress the brake pedal firmly to prevent the vehicle from moving.


    1. Turn the engine switch on (IG).

    2. Turn the LEXUS parking assist-sensor system 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 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 (2.4 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 Sonar Detection Range

        B005MY2C04
        *a w/o Rear No.2 Seat - -
        B005OJFC02
        *a w/ Rear No.2 Seat - -

        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 Sonar Detection Range

        B005LRKC04
        *a w/o Rear No.2 Seat - -
        B005PYLC04
        *a w/ Rear No.2 Seat - -

        Figure 3. Rear Center Sonar Detection Range

        B005LI3C03
        *a w/o Rear No.2 Seat - -
        B005P8NC03
        *a w/ Rear No.2 Seat - -

    4. Front corner sonar display and buzzer operation check


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

        Operation Condition
        Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On In any position other than P Less than approximately 10 km/h (6 mph) if speed is increasing
        B005LQTC02
        *A for Optitron Meter Type *B for TFT Meter Type
        *C for 12.3 Inch Display *D for 8 Inch Display
        *a Multi-information Display *b Headup Display (w/ Headup Display System)
        *c Multi-display *d Cooperated Display
        *e w/ Panoramic View Monitor System *f w/ Parking Assist Monitor System
        *g Side Screen Display *h Full Screen Display
        *i Close-range Detection *j Medium-range Detection
        *k Long-range Detection *l Example (Front Corner Sonar)
        B005P1LE19

        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 LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On In any position other than P or R Less than approximately 10 km/h (6 mph) if speed is increasing
        B005PRUC02
        *A for Optitron Meter Type *B for TFT Meter Type
        *C for 12.3 Inch Display *D for 8 Inch Display
        *a Multi-information Display *b Headup Display (w/ Headup Display System)
        *c Multi-display *d Cooperated Display
        *e w/ Panoramic View Monitor System *f w/ Parking Assist Monitor System
        *g Side Screen Display *h Full Screen Display
        *i Close-range Detection *j Medium-range Detection
        *k Long-range Detection *l Longest-range Detection
        *m Example (Front Center Sonar) - -
        B005NZHE02

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

        4. Operation Condition
        Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
        On (IG) On R Less than approximately 10 km/h (6 mph) if speed is increasing
      B005P2GC02
      *A for Optitron Meter Type *B for TFT Meter Type
      *C for 12.3 Inch Display *D for 8 Inch Display
      *a Multi-information Display *b Headup Display (w/ Headup Display System)
      *c Multi-display *d Cooperated Display
      *e w/ Panoramic View Monitor System *f w/ Parking Assist Monitor System
      *g Side Screen Display *h Full Screen Display
      *i Close-range Detection *j Medium-range Detection
      *k Long-range Detection *l Example (Rear Corner Sonar)
      B005P1LE19

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

      6. Operation Condition
      Engine Switch LEXUS Parking Assist-sensor System Shift Lever Position Vehicle Speed
      On (IG) On R Less than approximately 10 km/h (6 mph) if speed is increasing
    B005P6LC02
    *A for Optitron Meter Type *B for TFT Meter Type
    *C for 12.3 Inch Display *D for 8 Inch Display
    *a Multi-information Display *b Headup Display (w/ Headup Display System)
    *c Multi-display *d Cooperated Display
    *e w/ Panoramic View Monitor System *f w/ Parking Assist Monitor System
    *g Side Screen Display *h Full Screen Display
    *i Close-range Detection *j Medium-range Detection
    *k Long-range Detection *l Longest-range Detection
    *m Example (Rear Center Sonar) - -
    B005NZHE02

    Tech Tips

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