Toyota Tundra. Manual — part 176

WIRING DIAGRAM

Fig. 121: Radio Receiver Power Source - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FUSE (RAD NO. 1)

a. Disconnect the RAD NO. 1 fuse from the engine room junction block.

b. Disconnect the ACC fuse from the main body ECU.

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

Standard resistance

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

TESTER CONNECTION SPECIFIED CONDITION

NG: REPLACE FUSE

OK: Go to Next Step

2. CHECK HARNESS AND CONNECTOR (RECEIVER - BATTERY AND BODY GROUND)

a. Disconnect the K1*1, K4*2 and K9*2 receiver connectors.

HINT:

*1: for Built-in Type Amplifier System

*2: for Separate Type Amplifier System

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

Standard resistance:

for Built-in Type Amplifier System

TESTER CONNECTION SPECIFIED CONDITION

for Separate Type Amplifier System

TESTER CONNECTION SPECIFIED CONDITION

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

Standard voltage:

for Built-in Type Amplifier System

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection Condition Specified Condition

RAD NO. 1 fuse

Always

Below 1 ohms

ACC fuse

Tester Connection

Condition Specified Condition

K1-7 (GND) - Body ground Always

Below 1ohms

Tester Connection

Condition Specified Condition

K4-20 (GND) - Body ground

Always

Below 1 ohms

K9-14 (GND) - Body ground

Tester Connection

Switch Condition Specified Condition

K1-4 (B) - Body ground

Always

11 to 14 V

K1-3 (ACC) - Body ground Ignition switch ACC

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

Fig. 122: Checking Harness And Connector (Receiver - Battery And Body Ground)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

for Separate Type Amplifier System

TESTER CONNECTION SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (see PROBLEM SYMPTOMS TABLE )

Tester Connection

Switch Condition Specified Condition

K4-1 (B) - Body ground

Always

11 to 14 V

K9-5 (+B) - Body ground

K4-11 (ACC) - Body ground

Ignition switch ACC

K9-16 (ACC) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT

DESCRIPTION

This circuit provides power to the stereo component amplifier.

WIRING DIAGRAM

Fig. 123: Stereo Component Amplifier Power Source - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FUSE (AMP, ACC)

a. Disconnect the AMP fuse from the engine room junction block.

b. Disconnect the ACC fuse from the main body ECU.

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

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra