TOYOTA PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK

Info Added 2017-10-06


  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.

      Malfunctioning Item Detection Condition

      Warning Message

      (Multi-information Display)

      Malfunction Indication

      (Combination Meter Assembly)

      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

      Tech Tips

      Depending on the clearance warning ECU assembly, the "Clean Parking Assist Sensor" warning message may not be displayed.

      		 ○ ○

      • 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. Malfunction Indication (Combination Meter Assembly)

        B0048OAC02
        *a Open circuit indication *b Frozen indication

        Tech Tips

        Depending on the clearance warning ECU assembly, the "Clean Parking Assist Sensor" warning message may not be displayed.

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

        B0048QME07

        Tech Tips

        Buzzer sounding is stopped after approximately 7.5 seconds elapsed.

  2. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note

    While performing the following measurement and inspection, make sure to depress the brake pedal to prevent the vehicle from moving. (The parking brake should be released.)

    The following measurement and inspection will be performed 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 power switch on (IG).

    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/Center Other than P
        Front Side Other than P
        Rear Corner/Center Shift lever is in R
        Rear Side Other than 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

        B0048MPC01
        *a Approx. 500 mm (19.7 in.) *b Approx. 500 mm (19.7 in.)
        *c Approx. 650 mm (25.6 in.) *d Approx. 100 mm (3.9 in.)
        *e A *f B

        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 (A) does not represent the entire side view detection range.

        Figure 2. Front Center Sonar Detection Range

        B0048POC01
        *a Approx. 1760 mm (69.3 in.) *b Approx. 1000 mm (39.4 in.)
        *c Approx. 100 mm (3.9 in.) *d Approx. 650 mm (25.6 in.)

        Figure 3. Rear Center Sonar Detection Range

        B0048UDC01
        *a Approx. 1650 mm (65.0 in.) *b Approx. 1000 mm (59.1 in.)
        *c Approx. 2000 mm (78.7 in.) *d Approx. 650 mm (25.6 in.)
        *e Approx. 100 mm (3.9 in.) *f Wall

        Figure 4. Front Side Sonar

        B0048VQC01
        *a Approx. 1000 mm (39.4 in.) *b Approx. 1000 mm (39.4 in.)
        *c Approx. 400 mm (15.7 in.) *d Approx. 100 mm (7.9 in.)

    4. Front corner sonar display and buzzer operation check


      1. When the front corner ultrasonic sensor (LH/RH) have detected an obstacle, check the displays and check that the No. 1 clearance warning buzzer sounds.

        Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed Parking Brake
        On (IG) On When the shift lever is not in P Less than 10 km/h (6 mph) Released*1
        On (IG) On R - -
        B0048RLC01
        *a Multi-information Display *b Example (Front Corner Sonar)
        *c Close-range Detection *d Medium-range Detection
        *e Long-range Detection - -
        B0048UQE47

        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 front center ultrasonic sensor (LH/RH) have detected an obstacle, check the display and check that the No. 1 clearance warning buzzer sounds.

        3. Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed Parking Brake
        On (IG) On When the shift lever is not in P or R Less than 10 km/h (6 mph) Released*1
        On (IG) On R - -
        B0048LLC01
        *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
        B0048HXE31

        Tech Tips

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


        • *1: While the simple intelligent parking assist system is not operating

        • *2: While the simple intelligent parking assist system is operating

      3. Rear corner sonar display and buzzer operation check


        1. When the rear corner ultrasonic sensor (LH/RH) have detected an obstacle, check the display and check that the No. 2 clearance warning buzzer sounds.

        4. Operation Condition
        Power Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed Parking Brake
        On (IG) On R - -
      B0048JOC01
      *a Multi-information Display *b Example (Rear Corner Sonar)
      *c Close-range Detection *d Medium-range Detection
      *e Long-range Detection - -
      B0048UQE48

      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 rear center ultrasonic sensor (LH/RH) have detected an obstacle, check the display and check that the No. 2 clearance warning buzzer sounds.

      6. Operation Condition
      Power Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed Parking Brake
      On (IG) On R - -
    B0048UPC01
    *a Multi-information Display *b Example (Rear Center Sonar)
    *c Close-range Detection *d Medium-range Detection
    *e Long-range Detection *f Longest-range Detection
    B0048HXE32

    Tech Tips

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


    • *1: While the simple intelligent parking assist system is not operating

    • *2: While the simple intelligent parking assist system is operating

  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 No. 1 clearance warning buzzer or No. 2 clearance warning buzzer sounds.

    4. Operation Condition
    Power Switch TOYOTA Parking Assist-sensor System Shift Lever Position Vehicle Speed Parking Brake
    On (IG) On When the shift lever is not in P or R Less than 10 km/h (6 mph) Released*1
    On (IG) On R - -
B0048J4C01
*a Multi-information Display *b Example (Side Sonar)
*c Close-range Detection *d Medium-range Detection
*e Long-range Detection -
B0048UQE48

Tech Tips