Toyota Tundra Service Manual: Stereo Component Amplifier Power Source Circuit

DESCRIPTION

This circuit provides power to the stereo component amplifier 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 (STEREO COMPONENT AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J144-7 (GND) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
J144-4 (+B) - Body ground	Always	11 to 14 V
J144-3 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the J144 stereo component amplifier assembly connector.

(b) Disconnect the J137 radio and display receiver assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
J144-9 (AMP) - J137-9 (AMP)	Always	Below 1 Ω
J144-9 (AMP) - Body ground	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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