NAVIGATION SYSTEM(for Radio and Display Type) Microphone Circuit between Radio Receiver and Extension Module

DESCRIPTION

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

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

WIRING DIAGRAM

A005BKSE08

PROCEDURE


  1. CHECK NO. 1 NAVIGATION WIRE


    1. Remove the No. 1 navigation wire Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y2-5 (MIC+) - Y3-16 (MIC+) Always Below 1 Ω
      Y2-6 (MIC-) - Y3-17 (MIC-) Always Below 1 Ω
      Y2-1 (SLD4) - Y3-18 (MSHLD) Always Below 1 Ω
      Y2-5 (MIC+) - Body Ground Always 10 kΩ or higher
      Y2-6 (MIC-) - Body Ground Always 10 kΩ or higher
      Y2-1 (SLD4) - Body Ground Always 10 kΩ or higher

    OK

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

    NG

    REPLACE NO. 1 NAVIGATION WIRE Click here