Microphone Circuit Between Microphone and Navigation Receiver Assembly

NAVIGATION: NAVIGATION SYSTEM (w/ USB Audio System): Microphone Circuit between Microphone and Navigation Receiver Assembly
- 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

INSPECTION PROCEDURE

PROCEDURE

1. CHECK NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the K7 navigation receiver assembly connector.

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

Standard Resistance:

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - ROOF CONSOLE BOX)

(a) Disconnect the K7 navigation receiver assembly connector.

(b) Disconnect the W7 roof console box assembly connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE TELEPHONE MICROPHONE WITH ANOTHER CHECK

(a) Replace the telephone microphone assembly with a normal one Removal.

(b) Check if the same problem occurs again.

OK:

Malfunction disappears.

Result

C -- REPLACE ROOF CONSOLE BOX ASSEMBLY Removal

B -- REPLACE ROOF CONSOLE BOX ASSEMBLY Removal

A -- END (TELEPHONE MICROPHONE IS FAULTY)