NAVIGATION SYSTEM 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

A01IOIPE07

INSPECTION PROCEDURE

PROCEDURE


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


    1. Disconnect the z25 radio and display receiver assembly connector.

    2. Disconnect the z23 extension module connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z25-19 (MIC+) - z23-9 (MIC+) Always Below 1 Ω
      z25-20 (MIC-) - z23-25 (MIC-) Always Below 1 Ω
      z25-19 (MIC+) - Body ground Always 10 kΩ or higher
      z25-20 (MIC-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here