Toyota Tundra Service Manual: Rear Clearance Sonar Sensor LH Circuit

DESCRIPTION

The No. 2 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. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)

(a) Remove the No. 2 ultrasonic sensor (rear corner sensor LH) (See page ).

(b) Inspect the No. 2 ultrasonic sensor (rear corner sensor LH) (See page ).

NG

REPLACE NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)

OK

2.

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

(a) Disconnect the S1 No. 2 ultrasonic sensor (rear corner sensor LH) connector.

(b) Disconnect the S2 No. 3 ultrasonic sensor (rear center sensor LH) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

S1-1 (BI) - S2-2 (BO)

Always

Below 1 Ω

S1-3 (SI) - S2-4 (SO)

Always

Below 1 Ω

S1-5 (EI) - S2-6 (EO)

Always

Below 1 Ω

S1-1 (BI) - Body ground

Always

10 kΩ or higher

S1-3 (SI) - Body ground

Always

10 kΩ or higher

S1-5 (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

    Problem Symptoms Table

    Rear Clearance Sonar Sensor RH Circuit

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