Microphone Circuit between Multi-display and Navigation ECU

DESCRIPTION

This circuit sends a microphone signal from the multi-display to the navigation ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU)

1. Disconnect the multi-display connector p1 and navigation ECU connector p3.

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

   Standard resistance:

   Tester connection	Condition	Specified condition
   MCO+ - MIC+	Always	Below 1 Ω
   MCO- - MIC-	Always	Below 1 Ω
   MCO+ - Body ground	Always	10 kΩ or higher
   MCO- - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE