TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) OPERATION CHECK


  1. MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY)


    1. Open circuit indication


      1. If there is an open circuit between a No. 1 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A018MGIC01
        *A for Monochrome Type *B for Color Type

        Tech Tips

        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.

        A018IXRC01
        *A for Monochrome Type *B for Color Type

        Tech Tips


        • If a frozen indication is displayed, read Precaution for Toyota parking assist-sensor system first and confirm that the sensor is not covered with foreign matter.

          Click here

        • Check for DTCs and troubleshoot according to each inspection procedure after confirming that the sensor is not covered with foreign matter.

          Click here

  2. MALFUNCTION DISPLAY (MULTI-DISPLAY)


    1. Open circuit indication


      1. If there is an open circuit between the No. 1 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

        A018M83C01
        *a When the shift lever is not in R *b When the shift lever is in R

        Tech Tips

        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.

        A018HFPC01
        *a When the shift lever is not in R *b When the shift lever is in R

        Tech Tips


        • If a frozen indication is displayed, read Precaution for Toyota parking assist-sensor system first and confirm that the sensor is not covered with foreign matter.

          Click here

        • Check for DTCs and troubleshoot according to each inspection procedure after confirming that the sensor is not covered with foreign matter.

          Click here

  3. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION

    Note

    The following measurement and inspection will be performed 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 ignition switch to ON.

    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
        Rear Corner R
        Rear Center

      2. Move a 60 mm (2.36 in.) diameter pole near each sensor to measure its detection range. When measuring the longest-range detection of rear center sonar, use a wall or equivalent.

        Note

        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).

        Tech Tips

        Have an assistant move the pole.

        Figure 1. Rear Corner Sonar Detection Range

        A018J8AE01

        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. Rear Center Sonar Detection Range

        A018KJQE01

    4. Rear corner sonar display and buzzer operation check


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

        Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Assembly Shift Lever Position Vehicle Speed
        ON On R -
        A018KELC01
        *A for Monochrome Type *B for Color Type
        *a Multi-information Display *b Multi-display
        *c Example (Rear Corner Sonar) *d Close-range Detection
        *e Medium-range Detection *f Long-range Detection
        A018IPBE04

        Tech Tips

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

      2. Rear center sonar display and buzzer operation check


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

        3. Operation Condition
        Ignition Switch Back Sonar or Clearance Sonar Switch Assembly Shift Lever Position Vehicle Speed
        ON On R -
        A018LUSC01
        *A for Monochrome Type *B for Color Type
        *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 - -
        A002929E02

        Tech Tips

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