Toyota Tundra Service Manual: Back Sonar Sensor RH Circuit

DESCRIPTION

The No. 3 ultrasonic sensor sends and receives ultrasonic waves. Based on the received wave, the sensor calculates the approximate distance value 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. 3 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)

(a) Replace the No. 3 ultrasonic sensor (rear center sensor RH) (See page ).

(b) Inspect the No. 3 ultrasonic sensor (rear center sensor RH) (See page ).

NG

REPLACE NO. 3 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)

OK

2.

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

(a) Disconnect the S3 No. 3 ultrasonic sensor (rear center sensor RH) connector.

(b) Disconnect the S4 No. 2 ultrasonic sensor (rear corner sensor RH) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

S3-1 (BI) - S4-2 (BO)

Always

Below 1 Ω

S3-3 (SI) - S4-4 (SO)

Always

Below 1 Ω

S3-5 (EI) - S4-6 (EO)

Always

Below 1 Ω

S3-1 (BI) - Body ground

Always

10 kΩ or higher

S3-3 (SI) - Body ground

Always

10 kΩ or higher

S3-5 (EI) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Back Sonar Sensor LH Circuit

    Clearance Warning Buzzer Circuit

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