TOYOTA PARKING ASSIST-SENSOR SYSTEM 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 the obstacle, and sends the distance value as a signal to the clearance warning ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

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

   
   

   1. 

      Remove the No. 1 ultrasonic sensor (rear corner 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 (E) - 2 (S) Always 20 to 40 kΩ or higher

   
   

   NG

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

   OK

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

   
   

   1. Disconnect the U1 No. 1 clearance sensor (rear corner sensor RH) 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 U1-2 (S) - H95-18 (S1) Always Below 1 Ω U1-1 (E) - H95-17 (E1) Always Below 1 Ω U1-2 (S) - Body ground Always 10 kΩ or higher U1-1 (E) - 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