Toyota Tundra Service Manual: Microphone Circuit between Microphone and Navigation Receiver Assembly

Toyota Tundra Service Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System / Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

This circuit sends a microphone signal from the telephone microphone assembly to the navigation receiver assembly.

It also supplies power from the navigation receiver assembly to the telephone microphone assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)

(a) Disconnect the J135 navigation 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

J135-4 (MACC) - W11-1 (MACC)

Always

Below 1 Ω

J135-5 (MIN+) - W11-2 (MIC+)

Always

Below 1 Ω

J135-19 (MIN-) - W11-4 (MIC-)

Always

Below 1 Ω

J135-6 (SNS2) - W11-3 (SNS2)

Always

Below 1 Ω

J135-4 (MACC) - Body ground

Always

10 kΩ or higher

J135-5 (MIN+) - Body ground

Always

10 kΩ or higher

J135-19 (MIN-) - Body ground

Always

10 kΩ or higher

J135-18 (SGND) - Body ground

Always

10 kΩ or higher

J135-6 (SNS2) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK NAVIGATION RECEIVER ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J135-19 (MIN-) - Body ground

Always

Below 1 Ω

J135-18 (SGND) - Body ground

Always

Below 1 Ω

*a

Component with harness connected

(Navigation Receiver Assembly)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

J135-4 (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 NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

A

3.

CHECK 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 ASSEMBLY IS DEFECTIVE)

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

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