TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Back Sonar Sensor RH Circuit

DESCRIPTION

The ultrasonic sensor sends and receives ultrasonic waves. Based on the received wave, the sensor calculates the approximate distance between the vehicle and the obstacle, and sends the distance value as a signal to the clearance warning ECU assembly.

WIRING DIAGRAM

A01QUI7E06
*a No. 3 Ultrasonic Sensor (Rear Center Sensor RH)
*b No. 3 Ultrasonic Sensor (Rear Center Sensor LH)

PROCEDURE


  1. INSPECT NO. 3 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)


    1. A01QR4TE02

      Remove the No. 3 ultrasonic sensor (rear center sensor RH).

      Click here

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (BI) - 5 (EI) Always 10 kΩ or higher
      1 (BI) - 2 (BO) Always 10 kΩ or higher
      3 (SI) - 4 (SO) Always Below 1 Ω
      5 (EI) - 6 (EO) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 3 ULTRASONIC SENSOR (REAR CENTER SENSOR RH) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (REAR CENTER SENSOR RH - REAR CENTER SENSOR LH)


    1. Disconnect the S2 No. 3 ultrasonic sensor (rear center sensor RH) connector.

    2. Disconnect the S3 No. 3 ultrasonic sensor (rear center sensor LH) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      S2-3 (SI) - S3-4 (SO) Always Below 1 Ω
      S2-1 (BI) - S3-2 (BO) Always Below 1 Ω
      S2-5 (EI) - S3-6 (EO) Always Below 1 Ω
      S2-3 (SI) - Body ground Always 10 kΩ or higher
      S2-1 (BI) - Body ground Always 10 kΩ or higher
      S2-5 (EI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR