TOYOTA PARKING ASSIST-SENSOR SYSTEM Rear Clearance 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

A004TNYE36

PROCEDURE


  1. REPLACE REAR CORNER NO. 1 ULTRASONIC SENSOR LH


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


    NEXT

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

    A004NPNE02
    Text in Illustration
    *1

    Front view of wire harness connector

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

    Front view of wire harness connector

    (to Clearance Warning ECU)

    1. Disconnect the J4 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
      J4-3 (T) - D65-12 (BOR) Always Below 1 Ω
      J4-2 (S) - D65-3 (S4) Always Below 1 Ω
      J4-1 (E) - D65-11 (E2) Always Below 1 Ω
      J4-3 (T) - Body ground Always 10 kΩ or higher
      J4-2 (S) - Body ground Always 10 kΩ or higher
      J4-1 (E) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR