TOYOTA PARKING ASSIST-SENSOR SYSTEM (w/o Multi-display) 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 obstacle and sends the distance value as a signal to the clearance warning ECU.

WIRING DIAGRAM

A01DQT5E34

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01DPA9E01

      Remove the No. 1 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

    NG

    REPLACE NO. 1 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 U4 No. 1 ultrasonic sensor (rear center sensor RH) connector.

    2. Disconnect the V4 No. 1 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
      U4-1 (BI) - V4-2 (BO) Always Below 1 Ω
      U4-3 (SI) - V4-4 (SO) Always Below 1 Ω
      U4-5 (EI) - V4-6 (EO) Always Below 1 Ω
      U4-1 (BI) - Body ground Always 10 kΩ or higher
      U4-3 (SI) - Body ground Always 10 kΩ or higher
      U4-5 (EI) - 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