TOYOTA PARKING ASSIST-SENSOR SYSTEM 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.

WIRING DIAGRAM

E212830E03

PROCEDURE

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

    1. E200293E01

      Remove the No. 1 ultrasonic sensor (rear corner sensor LH) (Click here).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 (E) - 2 (S)

      Always

      20 to 40 kΩ

    REPLACE NO. 1 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)

    (Click here)

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

    1. Disconnect the U4 No. 1 ultrasonic sensor (rear corner sensor LH) connector.

    2. Disconnect the H95 clearance warning ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      U4-1 (E) - H95-37 (E2)

      Always

      Below 1 Ω

      U4-2 (S) - H95-38 (S2)

      Always

      Below 1 Ω

      U4-1 (E) - Body ground

      Always

      10 kΩ or higher

      U4-2 (S) - Body ground

      Always

      10 kΩ or higher

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR