Toyota Tundra. Manual — part 172

Fig. 108: Microphone Circuit Between Microphone And Radio Receiver - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TSW- - SGND)

a. Disconnect the K9 receiver connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition Specified Condition

K9-3 (TSW-) - K9-6 (MGND) Always

Below 1 ohms

K9-3 (TSW-) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

Fig. 109: Identifying K9 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Go to Next Step

2. CHECK HARNESS AND CONNECTOR (MICROPHONE - RADIO RECEIVER)

a. Disconnect the W7 microphone connector.

b. Disconnect the K9 receiver connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition Specified Condition

W7-10(ACC) - K9-7 (MCVD)

Always

Below 1 ohms

W7-9 (MIC+) - K9-2 (MIC+)

W7-8 (MIC-) - K9-1 (MIC-)

W7-10 (ACC) - Body ground

Always

10 kohms or higher

W7-9 (MIC+) - Body ground

W7-8 (MIC-) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

Fig. 110: Identifying W7 And K9 Connectors Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Go to Next Step

3. CHECK RADIO RECEIVER (MCVD VOLTAGE)

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Result:

RESULT REFERENCE

Tester Connection

Switch Condition Specified Condition

K9-7 (MCVD) - Body ground Ignition switch ON

4 to 6V

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

B: REPLACE RADIO RECEIVER (see REMOVAL )

Fig. 111: Identifying Radio Receiver Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

C: REPLACE RADIO RECEIVER (see REMOVAL )

A: Go to Next Step

4. REPLACE MICROPHONE WITH ANOTHER AND CHECK

a. Replace the microphone with a normal one (see REMOVAL ).

b. Check if the same problem occurs again.

OK: Malfunction disappears.

NG: REPLACE ROOF CONSOLE BOX ASSEMBLY (See REMOVAL )

OK: END (MICROPHONE IS FAULTY)

RADIO RECEIVER COMMUNICATION ERROR

INSPECTION PROCEDURE

1. IDENTIFY COMPONENT SHOWN BY SUB-CODE

a. Enter the diagnostic mode.

NG (for Floor Shift Type)

C

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra