TOYOTA PARKING ASSIST-SENSOR SYSTEM Back Sonar Sensor LH Circuit

DESCRIPTION

The ultrasonic sensor sends and receives ultrasonic waves. Based on the received wave, the ECU calculates the approximate distance value between the vehicle and the obstacle.

WIRING DIAGRAM

A005STFE19

INSPECTION PROCEDURE

PROCEDURE


  1. REPLACE REAR CENTER NO. 1 ULTRASONIC SENSOR LH


    1. Replace the ultrasonic sensor with a normally functioning sensor Click here.


    NEXT

  2. CHECK HARNESS AND CONNECTOR (REAR CENTER NO. 1 ULTRASONIC SENSOR LH - CLEARANCE WARNING ECU)

    A005RKBE01
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Rear Center No. 1 Ultrasonic Sensor LH)
    *2

    Front view of wire harness connector

    (to Clearance Warning ECU)

    1. Disconnect the J3 sensor connector.

    2. Disconnect the D65 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J3-3 (T) - D65-12 (BOR) Always Below 1 Ω
      J3-2 (S) - D65-5 (S3) Always Below 1 Ω
      J3-1 (E) - D65-11 (E2) Always Below 1 Ω
      J3-3 (T) - Body ground Always 10 kΩ or higher
      J3-2 (S) - Body ground Always 10 kΩ or higher
      J3-1 (E) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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