Toyota 4Runner: Back Sonar Sensor LH Circuit

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Intuitive Parking Assist System / Back 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

PROCEDURE

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

(a) Remove the No. 1 ultrasonic sensor (rear center sensor LH) (See page ).

(b) Inspect the No. 1 ultrasonic sensor (rear center sensor LH) (See page ).

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

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

(a) Disconnect the P3 No. 1 ultrasonic sensor (rear center sensor LH) connector.

(b) Disconnect the F95 clearance warning ECU assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P3-1 (E) - F95-15 (E4)	Always	Below 1 Ω
P3-2 (S) - F95-16 (S4)	Always	Below 1 Ω
P3-1 (E) - Body ground	Always	10 kΩ or higher
P3-2 (S) - Body ground	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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