TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 4 Sensor Type) Rear Clearance Sonar Sensor LH Circuit

DTC Code DTC Name
Rear Clearance Sonar Sensor LH 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

E270572E07

PROCEDURE

  1. INSPECT NO. 3 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)

    1. E270573E01

      Remove the No. 3 ultrasonic sensor (rear corner sensor LH).

      Click hereClick 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 CORNER SENSOR LH)

    Click hereClick here

    OK

  2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR CORNER SENSOR LH)

    1. Disconnect the G33 clearance warning assembly connector.

    2. Disconnect the S4 No. 3 ultrasonic sensor (rear corner sensor LH) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G33-14 (SOR) - S4-3 (SI)

      Always

      Below 1 Ω

      G33-12 (BOR) - S4-1 (BI)

      Always

      Below 1 Ω

      G33-13 (E1) - S4-5 (EI)

      Always

      Below 1 Ω

      G33-14 (SOR) - Body ground

      Always

      10 kΩ or higher

      G33-12 (BOR) - Body ground

      Always

      10 kΩ or higher

      G33-13 (E1) - 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