Toyota Tundra Service Manual: Microphone Circuit between Microphone and Radio Receiver

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION

This circuit sends a microphone signal from the telephone microphone assembly to the radio and display receiver assembly.

It also supplies power from the radio and display receiver assembly to the telephone microphone assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)

(a) Disconnect the J139 radio and display receiver assembly connector.

(b) Disconnect the W11 telephone microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J139-4 (MACC) - W11-1 (MACC)

Always

Below 1 Ω

J139-5 (MIN+) - W11-2 (MIC+)

Always

Below 1 Ω

J139-19 (MIN-) - W11-4 (MIC-)

Always

Below 1 Ω

J139-6 (SNS2) - W11-3 (SNS2)

Always

Below 1 Ω

J139-4 (MACC) - Body ground

Always

10 kΩ or higher

J139-5 (MIN+) - Body ground

Always

10 kΩ or higher

J139-19 (MIN-) - Body ground

Always

10 kΩ or higher

J139-18 (SGND) - Body ground

Always

10 kΩ or higher

J139-6 (SNS2) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J139-19 (MIN-) - Body ground

Always

Below 1 Ω

J139-18 (SGND) - Body ground

Always

Below 1 Ω

*a

Component with harness connected

(Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

J139-4 (MACC) - Body ground

Ignition switch ACC

4.75 to 5.25 V

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

A

3.

REPLACE TELEPHONE MICROPHONE ASSEMBLY

(a) Replace the telephone microphone assembly with a known good one (See page ).

(b) Check if the same problem occurs again.

OK:

Malfunction disappears.

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

A

END (TELEPHONE MICROPHONE IS DEFECTIVE)

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Illumination for Panel Switch does not Come on with Tail Switch ON

    No Sound can be Heard from Speakers

    See More:

    Toyota Tundra Service Manual > 1ur-fe Emission Control: Pcv Valve
    ComponentsCOMPONENTS ILLUSTRATION InspectionINSPECTION PROCEDURE 1. INSPECT PCV VALVE SUB-ASSEMBLY (a) Install a clean hose to the PCV valve sub-assembly. (b) Check the PCV valve sub-assembly operation. (1) Blow air into the cylinder head side, and check that air passes through easily. CAUTION: Do ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2021 Copyright www.ttundra.com
    0.0179