LEXUS PARKING ASSIST-SENSOR SYSTEM OPERATION CHECK


  1. INITIAL CHECK FUNCTION

    A01GY63E15

    1. Turn the power switch on (IG).

    2. After 2 seconds or more have passed, turn the clearance sonar main switch ON. Then check the buzzer sounding condition.

      Tech Tips


      • If a malfunction is detected in the ultrasonic sensor circuits, the location of the malfunctioning sensor blinks on the display's vehicle graphic. However, after the sensor returns to normal, the display also returns to normal.

      • When the power switch is turned on (IG) while the clearance sonar main switch is ON, the buzzer will not sound.

    3. MALFUNCTION OF MULTI-INFORMATION DISPLAY


      1. Ultrasonic sensor open circuit


        1. If there is an open circuit between the ultrasonic sensor and the ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

          A01GXQZE01

          Tech Tips


          • The example shows an open circuit in the No. 1 ultrasonic sensor (front left sensor).

          • If a sensor has an open circuit, "Check Park Sonar System" is displayed. Refer to "open circuit in front sensor is displayed as a result or self-check" on the 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.

          A01H0U0E01

          Tech Tips


          • The example shows that the No. 1 ultrasonic sensor (front sensors) is frozen.

          • If "Clean Park Sonar" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.

    4. MALFUNCTION OF DISPLAY


      1. Ultrasonic sensor open circuit


        1. A01H07F

          If there is an open circuit between the ultrasonic sensor and the ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

          Tech Tips


          • This example shows an open circuit in the No. 1 ultrasonic sensor (rear right sensor).

          • If a sensor has an open circuit, refer to "open circuit in rear sensor is displayed as a result of self-check" on the Problem Symptoms Table to inspect it.

      2. Ultrasonic sensor frozen


        1. A01GYYE

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

          Tech Tips


          • The example shows that the ultrasonic sensor (front left sensor) is covered with foreign matter.

          • If "Clean sonar" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.

    5. DETECTION RANGE MEASUREMENT AND DISPLAY INSPECTION


      1. Detection range measurement

        CAUTION:

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


        1. Turn the power switch on (IG).

        2. Move the shift lever to R position to check the front side sensors, rear center sensors and rear corner sensors.

        3. Move the shift lever to D, S and N position to check front side sensors, front corner sensors and front center sensors.

      2. Turn the clearance sonar main switch ON.

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


        1. Front center sensors detection range

          A01H02OE01

        2. Front corner sensors detection range

          A01GZM2E01

        3. Front side sensors detection range

          A01GWQXE01

        4. Rear center sensors detection range

          A01H0XOE01

        5. Rear corner sensors detection range

          A01H1MHE01

          Note

          These detection ranges are applicable when positioning the φ 60 mm (2.36 in.) pole parallel or perpendicular to the ground. The ranges vary depending on the measuring method and type of obstacle (such as walls).

      4. When the ultrasonic sensors have detected an obstacle, check the multi-information display, accessory meter and buzzer sounds with the clearance sonar main switch ON.

      6. Operation Condition
      Shift Lever Position Vehicle Speed Buzzer Detection, Multi-information Display Detection, Accessory Meter Detection

      Front Center LH

      Front Center RH

      Front Corner LH

      Front Corner RH

      Front Side LH

      Front Side RH

      Rear Center LH

      Rear Center RH

      Rear Corner LH

      Rear Corner RH
      P - Only perform check operation
      D, S 9 km/h (5 mph) or less ○ ○ ○ X X
      13 km/h (8 mph) or more X X X X X
      R 9 km/h (5 mph) or less X X ○ ○ ○
      13 km/h (8 mph) or more X X ○ ○ ○
      (N) 9 km/h (5 mph) or less ○ ○ ○ X X
      13 km/h (8 mph) or more X X X X X

    1. Check the buzzer sounds with the clearance sonar main switch ON.

      A01GZ9PE01
      Front Corner Detection Range
      Detection Distance
      1. Close-range detection Within 300 +/-30 mm (11.8 +/-1.18 in.)
      2. Medium-range detection 300 +/-30 to 375 +/-40 mm (11.8 +/-1.18 to 14.8 +/-1.57 in.)
      3. Long-range detection 375 +/-40 to 600 +/-60 mm (14.8 +/-1.57 to 23.6 +/-2.36 in.)
      Rear Corner Detection Range
      Detection Distance
      1. Close-range detection Within 250 +/-30 mm (9.84 +/-1.18 in.)
      2. Medium-range detection 250 +/-30 to 375 +/-40 mm (9.84 +/-1.18 to 14.8 +/-1.57 in.)
      3. Long-range detection 375 +/-40 to 600 +/-60 mm (14.8 +/-1.57 to 23.6 +/-2.36 in.)
      Front Center Detection Range
      Detection Distance
      1. Close-range detection Within 300 +/-30 mm (11.8 +/-1.18 in.)
      2. Medium-range detection 300 +/-30 to 375 +/-40 mm (11.8 +/-1.18 to 14.8 +/-1.57 in.)
      3. Long-range detection 375 +/-40 to 500 +/-50 mm (14.8 +/-1.57 to 19.7 +/-1.97 in.)
      4. Maximum long-range detection 500 +/-50 to 1000 +/-100 mm (19.7 +/-1.97 to 39.4 +/-3.94 in.)
      Rear Center Detection Range
      Detection Distance
      1. Close-range detection Within 350 +/-40 mm (13.8 +/-1.57 in.)
      2. Medium-range detection 350 +/-40 to 450 +/-50 mm (13.8 +/-1.57 to 17.7 +/-1.97 in.)
      3. Long-range detection 450 +/-50 to 600 +/-60 mm (17.7 +/-1.97 to 23.6 +/-2.36 in.)
      4. Maximum long-range detection

      600 +/-60 to 1000 +/-100 mm (23.6 +/-2.36 to 39.4 +/-3.94 in.)

      600 +/-60 to 1500 +/-150 mm (23.6 +/-2.36 to 59.1 +/-5.91 in.) (To the wall)
      Front Side Detection Range
      Detection Distance
      1. Close-range detection Within 300 +/-30 mm (11.8 +/-1.18 in.)
      2. Medium-range detection 300 +/-30 to 375 +/-40 mm (11.8 +/-1.18 to 14.8 +/-1.57 in.)
      3. Long-range detection 375 +/-40 to 500 +/-50 mm (14.8 +/-1.57 to 19.7 +/-1.97 in.)

      Tech Tips

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

    2. Check the accessory meter, multi-information display and buzzer, when the front corner sensors and front center sensors have detected an obstacle.

      Operation Condition
      Power Switch Clearance Sonar Main Switch Shift Lever Position Vehicle Speed
      on (IG) ON D, S, N 9 km/h (5 mph) or less
      A01H198E01
      Multi-information Display
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (blinking)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (illuminated)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (illuminated)
      4. Maximum long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 650 msec.)

      		 4 (illuminated)
      A01H11BE01
      Accessory Meter
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (red illumination)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (yellow illumination)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (yellow illumination)
      4. Maximum long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 650 msec.)

      		 4 (yellow illumination)

      Tech Tips

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

    3. Check the accessory meter, multi-information display and buzzer, when the rear center sensors and rear corner sensors have detected an obstacle.

      Operation Condition
      Power Switch Clearance Sonar Main Switch Shift Lever Position
      on (IG) ON R position
      A01GXHVE01
      Multi-information Display
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (blinking)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (illuminated)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (illuminated)

      4. Maximum long-range detection

      (for Rear center sensors)

      Sounds intermittently

      (ON: 150 msec. / OFF: 650 msec.)

      		 4 (illuminated)
      A01H0NCE01
      Accessory Meter
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (red illumination)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (yellow illumination)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (yellow illumination)

      4. Maximum long-range detection

      (for Rear center sensors)

      Sounds intermittently

      (ON: 150 msec. / OFF: 650 msec.)

      		 4 (yellow illumination)

      Tech Tips

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

    4. Check the accessory meter, multi-information display and buzzer, when the front side sensors have detected an obstacle.

      Operation Condition
      Power Switch Clearance Sonar Main Switch Shift Lever Position
      on (IG) ON R position
      A01H198E02
      Multi-information Display
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (blinking)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (illuminated)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (illuminated)
      A01GZTNE01
      Accessory Meter
      Detection Range Buzzer Number of bars displayed
      1. Close-range detection Sounds continuously 1 (red illumination)
      2. Medium-range detection

      Sounds intermittently

      (ON: 75 msec. / OFF: 75 msec.)

      		 2 (yellow illumination)
      3. Long-range detection

      Sounds intermittently

      (ON: 150 msec. / OFF: 150 msec.)

      		 3 (yellow illumination)

      Tech Tips

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