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

A0093Y9E21

INSPECTION PROCEDURE

PROCEDURE


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


    1. Replace the No. 1 ultrasonic sensor with a normally functioning sensor Click here.


    NEXT

  2. CHECK HARNESS AND CONNECTOR (REAR CORNER SENSOR RH - REAR CENTER SENSOR RH)


    1. Disconnect the U2 No. 1 clearance sensor (rear corner sensor RH) connector.

    2. Disconnect the U1 No. 1 clearance sensor (rear center sensor RH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U2-1 (BI) - U1-2 (BO) Always Below 1 Ω
      U2-3 (SI) - U1-4 (SO) Always Below 1 Ω
      U2-5 (EI) - U1-6 (EO) Always Below 1 Ω
      U2-1 (BI) - Body ground Always 10 kΩ or higher
      U2-3 (SI) - Body ground Always 10 kΩ or higher
      U2-5 (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