Toyota Tundra Service Manual: Front Clearance Sonar Sensor RH Circuit

DESCRIPTION

The No. 1 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. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH)

(a) Remove the No. 1 ultrasonic sensor (front corner sensor RH) (See page ).

(b) Inspect the No. 1 ultrasonic sensor (front corner sensor RH) (See page ).

NG

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

OK

2.

CHECK HARNESS AND CONNECTOR (FRONT CORNER SENSOR RH - CLEARANCE WARNING ECU ASSEMBLY)

(a) Disconnect the B1 No. 1 ultrasonic sensor (front corner sensor RH) connector.

(b) Disconnect the J35 clearance warning ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B1-1 (BI) - J35-3 (BOF)

Always

Below 1 Ω

B1-3 (SI) - J35-5 (SOF)

Always

Below 1 Ω

B1-5 (EI) - J35-4 (E5)

Always

Below 1 Ω

B1-1 (BI) - Body ground

Always

10 kΩ or higher

B1-3 (SI) - Body ground

Always

10 kΩ or higher

B1-5 (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

    Front Clearance Sonar Sensor LH Circuit

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