Toyota Tundra Service Manual: Front Clearance Sonar Sensor LH 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.

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

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

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

NG

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

OK

2.

CHECK HARNESS AND CONNECTOR (FRONT CORNER SENSOR LH - FRONT CORNER SENSOR RH)

(a) Disconnect the C1 No. 1 ultrasonic sensor (front corner sensor LH) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C1-1 (BI) - B1-2 (BO)

Always

Below 1 Ω

C1-3 (SI) - B1-4 (SO)

Always

Below 1 Ω

C1-5 (EI) - B1-6 (EO)

Always

Below 1 Ω

C1-1 (BI) - Body ground

Always

10 kΩ or higher

C1-3 (SI) - Body ground

Always

10 kΩ or higher

C1-5 (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

    Clearance Warning ECU Power Source Circuit

    Front Clearance Sonar Sensor RH Circuit

    See More:

    Toyota Tundra Service Manual > Can Communication System: Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected ...

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