Toyota Tundra Service Manual: Radio Receiver Power Source Circuit

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / Radio Receiver Power Source Circuit

DESCRIPTION

This circuit provides power to the radio and display receiver 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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - BATTERY AND GROUND)

(a) Disconnect the radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J137-7 (GND1) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
J137-4 (+B1) - Body ground	Always	11 to 14 V
J137-3 (ACC1) - Body ground	Ignition switch ACC	11 to 14 V
J139-1 (IG) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Radio and Display Receiver Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Radio Broadcast cannot be Received (Bad Reception)

Registered Device cannot be Deleted

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