Toyota Tundra Service Manual: Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit is the power source circuit to operate the clearance warning ECU assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the back sonar or clearance sonar switch assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
J125-6 (IG) - Body ground	Ignition switch ON	11 to 14 V
J125-6 (IG) - Body ground	Ignition switch off	Below 1 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
J125-7 (E) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Back Sonar or Clearance Sonar Switch Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

(a) Remove the back sonar or clearance sonar switch assembly (See page ).

(b) Inspect the back sonar or clearance sonar switch assembly (See page ).

REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

3.	CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY AND BODY GROUND)

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

(b) Disconnect the J125 back sonar or clearance sonar switch assembly connector.

Standard Resistance:

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Toyota Tundra Service Manual > Tire Pressure Warning System: Lost Communication with Brake System Control Module (U0129/29)
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Toyota Tundra Owners Manual