Navigation System Microphone Circuit Between Radio Receiver And Extension Module

Audio Visual Telematics. Corolla. Zre142 Aze141
Navigation Multi Info Display. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

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


Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System.Navigation System Microphone Circuit Between Radio Receiver And Extension Module


INSPECTION PROCEDURE

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

  1. Disconnect the radio and display receiver assembly connector.

  1. Disconnect the extension module connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    f2-19 (MIC+) - f1-9 (MIC+)
    		Always
    		Below 1 Ω
    f2-20 (MIC-) - f1-25 (MIC-)
    		Always
    		Below 1 Ω
    f2-21 (SHD2) - f1-24 (SHD2)
    		Always
    		Below 1 Ω
    f2-19 (MIC+) - Body ground
    		Always
    		10 kΩ or higher
    f2-20 (MIC-) - Body ground
    		Always
    		10 kΩ or higher
    f2-21 (SHD2) - 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 (COROLLA_ZRE142 RM0000011BR0H9X.html)