Microphone Circuit Between Microphone and Navigation Receiver Assembly

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION 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 microphone amplifier assembly to the navigation receiver assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





(a) Disconnect the I7 navigation receiver assembly connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(c) Reconnect the navigation receiver assembly connector.

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

2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - MICROPHONE AMPLIFIER ASSEMBLY)





(a) Disconnect the I7 navigation receiver assembly connector.
(b) Disconnect the U7 roof console box assembly connector.
(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(d) Reconnect the navigation receiver assembly connector.
(e) Reconnect the roof console box assembly connector.

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

3. INSPECT NAVIGATION RECEIVER ASSEMBLY (MACC VOLTAGE)




(a) Reconnect the I7 navigation receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





(c) Reconnect the navigation receiver assembly connector.

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

4. REPLACE MICROPHONE AMPLIFIER ASSEMBLY WITH ANOTHER AND CHECK
(a) Replace the telephone microphone assembly with a normal one Removal.
(b) Check if the same problem occurs again.
OK:
Malfunction disappears

NG -- REPLACE ROOF CONSOLE BOX ASSEMBLY
OK -- END (MICROPHONE IS FAULTY)