Toyota Tundra. Manual — part 217

OK: REPLACE COMBINATION METER (See REMOVAL )

CELLULAR PHONE VOICE CIRCUIT BETWEEN RADIO RECEIVER AND STEREO
COMPONENT AMPLIFIER

SYSTEM DESCRIPTION

This circuit is used when the cellular phone voice in the "Bluetooth" handsfree system is on.

WIRING DIAGRAM

Fig. 233: Cellular Phone Voice Circuit Between Radio Receiver And Stereo Component Amplifier -
Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT

AMPLIFIER)

a. Disconnect the K3 receiver connector.

b. Disconnect the K15 amplifier connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection

Condition Specified Condition

K3-11 (IVO+) - K15-23 (II1+)

Always

Below 1 ohms

K3-12 (IVO-) - K15-22 (II1-)
K3-11 (IVO+) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 234: Identifying K3 And K15 Connectors Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

MICROPHONE CIRCUIT BETWEEN MICROPHONE AND RADIO RECEIVER

DESCRIPTION

This circuit sends a microphone signal from the microphone to the radio receiver. It also supplies power from
the radio receiver to the microphone.

WIRING DIAGRAM

K3-12 (IVO-) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

Fig. 235: 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. 236: 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