Microphone Circuit between Radio Receiver and Extension Module

NAVIGATION: NAVIGATION SYSTEM: Microphone Circuit between Radio Receiver and Extension Module
- Microphone Circuit between Radio Receiver and Extension Module

DESCRIPTION

This circuit sends a microphone voice signal from the extension module to the radio and display receiver assembly.

Using this circuit, the extension module disables the microphone function of the radio and display receiver assembly to receive a microphone voice signal from the telephone microphone assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

(a) Disconnect the R19 radio and display receiver assembly connector.

(b) Disconnect the E15 extension module connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table