NAVIGATION SYSTEM > Microphone Circuit between Overhead J/B and Multi-display

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DESCRIPTION

This circuit sends a microphone signal from the overhead J/B to the multi-display. It also supplies power from the multi-display to the overhead J/B.

WIRING DIAGRAM


E111751E02


INSPECTION PROCEDURE

1.INSPECT MULTI-DISPLAY


    I045247E01

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

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    MACC - Body ground
    		Ignition SW ACC
    		4 to 6 V



NG
REPLACE MULTI-DISPLAY
OK


2.CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MULTI-DISPLAY)


    E111752E02

  1. Disconnect the overhead J/B connector O2 and multi-display connector M4.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    ACC - MACC
    		Always
    		Below 1 Ω
    MI1+ - MCI+
    		Always
    		Below 1 Ω
    MIC- - MCI-
    		Always
    		Below 1 Ω
    ACC - Body ground
    		Always
    		10 kΩ or higher
    MI1+ - Body ground
    		Always
    		10 kΩ or higher
    MIC- - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL