TOYOTA PARKING ASSIST-SENSOR 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 meter circuit plate and navigation receiver assembly*1*2 or radio and display receiver assembly*2*3.


      • *1: w/ Parking Assist Monitor System

      • *2: for Navigation Receiver Type

      • *3: for Radio and Display Type

      Malfunctioning Item Detection Condition

      Warning Message

      (Multi-information Display)

      Malfunction Indication

      (Meter Circuit Plate)

      Malfunction Indication

      (Navigation Receiver Assembly*1*2 or Radio and Display Receiver Assembly*1*3)

      Buzzer Sounding

      (No. 1 Clearance Warning Buzzer and No. 2 Clearance Warning Buzzer)

      		 Suspected Area
      Frozen indication

      • The ultrasonic sensor is covered with foreign matter, such as mud or snow

      • The ultrasonic sensor is frozen

      		 Clean Parking Assist Sensor ○ ○ ○

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

        Click here

      • 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 ultrasonic sensor

      • The ultrasonic sensor is malfunctioning

      		 Parking Assist Malfunction ○ ○ ○

      Check for DTCs

      Click here


      • *1: w/ Parking Assist Monitor System

      • *2: for Navigation Receiver Type

      • *3: for Radio and Display Type


      1. Malfunction Indication (Meter Circuit Plate)

        A003MBRC01
        *a Open circuit indication *b Frozen indication

      2. Malfunction Indication (Navigation Receiver Assembly*1*2 or Radio and Display Receiver Assembly*1*3)


        • *1: w/ Parking Assist Monitor System

        • *2: for Navigation Receiver Type

        • *3: for Radio and Display Type

        A003OIUC01
        *a Open circuit indication *b Reverse (R) selected
        A003M03C01
        *a Frozen indication *b Reverse (R) selected

      3. Buzzer Sounding (No. 1 Clearance Warning Buzzer and No. 2 Clearance Warning Buzzer)

        A003N5DE03

        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 a shift state other than park (P) selected. 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 TOYOTA parking assist-sensor system on.

    3. Detection range measurement:


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

        Measurement Area Shift State
        Front Corner Other than park (P)
        Front Center Other than park (P) or reverse (R)
        Front Side Other than park (P)
        Rear Corner Reverse (R)
        Rear Center
        Rear Side Other than park (P)

      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

        A003P1JE01

        Note

        The 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

        A003NXIE01
        *1 Approx. 1760 mm (69.3 in.)
        *2 Approx. 200 mm (7.9 in.)
        *3 Approx. 1000 mm (39.4 in.)
        *4 Approx. 400 mm (15.7 in.)

        Figure 3. Rear Center Sonar Detection Range

        A003P5BE01

        Figure 4. Side Sonar Detection Range

        A003MAUE01
        *1 Approx. 1000 mm (39.4 in.)
        *2 Approx. 500 mm (19.7 in.)
        *3 Approx. 200 mm (7.9 in.)

    4. Front corner sonar display and buzzer operation check


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

        Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift State Vehicle Speed
        On (Ready) On Other than park (P) Less than approximately 10 km/h (6 mph) if speed is increasing
        A003K60C01
        *a Multi-information Display *b Multi-display (w/ Parking Assist Monitor System)
        *c Example (Front Corner Sonar) *d Close-range Detection
        *e Medium-range Detection *f Long-range Detection
        *g Reverse (R) selected - -
        A003MLSE19

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

        3. Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift State Vehicle Speed
        On (Ready) On Other than park (P) or reverse (R) Less than approximately 10 km/h (6 mph) if speed is increasing
        A003OIYC01
        *a Multi-information Display *b Example (Front Center Sonar)
        *c Close-range Detection *d Medium-range Detection
        *e Long-range Detection *f Longest-range Detection
        A003O6EE02

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

        4. Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift State Vehicle Speed
        On (Ready) On Reverse (R) Less than approximately 10 km/h (6 mph) if speed is increasing
      A003LH6C01
      *a Multi-information Display *b Multi-display (w/ Parking Assist Monitor System)
      *c Example (Rear Corner Sonar) *d Close-range Detection
      *e Medium-range Detection *f Long-range Detection
      *g Reverse (R) selected - -
      A003MLSE19

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

      6. Operation Condition
      Power Switch TOYOTA Parking Assist-sensor System Shift State Vehicle Speed
      On (Ready) On Reverse (R) Less than approximately 10 km/h (6 mph) if speed is increasing
    A003OCYC01
    *a Multi-information Display *b Multi-display (w/ Parking Assist Monitor System)
    *c Example (Rear Center Sonar) *d Close-range Detection
    *e Medium-range Detection *f Long-range Detection
    *g Longest-range Detection *h Reverse (R) selected
    A003O6EE02

    Tech Tips

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

  3. Side sonar display and buzzer operation check


    1. When the ultrasonic sensors (side sonar) have detected an obstacle, check the display and check that the buzzer sounds.

    4. Operation Condition
    Power Switch TOYOTA Parking Assist-sensor System Shift State Vehicle Speed Steering angle
    On (Ready) On Other than park (P) Less than approximately 10 km/h (6 mph) if speed is increasing Steering wheel turned 90° or more
A003N6SC01
*a Multi-information Display *b Multi-display (w/ Parking Assist Monitor System)
*c Example (Side Sonar) *d Close-range Detection
*e Medium-range Detection *f Long-range Detection
*g Reverse (R) selected - -
A003MLSE19
Multi-display and Buzzer (w/ Parking Assist Monitor System)
Detection Range During Judgment Obstacle

Close-range detection

Within approx. 300 +/- 150 mm (11.8 +/- 5.91 in.)

Buzzer: Sounds continuously

Color of bars displayed: Red (illuminated)

 60 mm (2.4 in.) diameter pole

Medium-range detection

From approx. 300 +/- 150 to 700 +/- 150 mm (11.8 +/- 5.91 to 27.6 +/- 5.91 in.)

Buzzer: Sounds intermittently (ON: 0.1 sec. / OFF: 0.1 sec.)

Color of bars displayed: Yellow (blinking)

 60 mm (2.4 in.) diameter pole

Long-range detection

From approx. 700 +/- 150 to 1000 +/- 150 mm (27.6 +/- 5.91 to 39.4 +/- 5.91 in.)

Buzzer: Sounds intermittently (ON: 0.2 sec. / OFF: 0.2 sec.)

Color of bars displayed: Yellow (blinking)

 60 mm (2.4 in.) diameter pole

Tech Tips