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 inspection procedure.

PROCEDURE

1.

CHECK VEHICLE CONDITION

(a) Check the vehicle condition.

Result

Result

Proceed to

for 7 or 9 Speakers

A

for 12 Speakers

B

B

GO TO STEP 4

A

2.

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J144-4 (+B) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Stereo Component Amplifier Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - NAVIGATION RECEIVER ASSEMBLY)

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

(b) Disconnect the J133 navigation receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J144-9 (AMP) - J133-9 (AMP)

Always

Below 1 Ω

J144-9 (AMP) - 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

4.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the stereo component amplifier assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J143-6 (GND) - Body ground

Always

Below 1 Ω

J143-7 (GND2) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J142-1 (+B) - J143-6 (GND)

Always

11 to 14 V

J142-5 (+B2) - J143-6 (GND)

Always

11 to 14 V

J141-12 (ACC) - J143-6 (GND)

Ignition switch ACC

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Stereo Component Amplifier Assembly)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Steering Pad Switch Circuit

    System Description

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