Microphone Circuit Between Multi-Display and Navigation ECU: Procedure

1. Disconnect the multi-display connector p1 and navigation ECU connector p3.
   Fig 1: Identifying Multi-Display Connector P1 And Navigation ECU Connector P3

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   MCO+ - MCO+	Always	Below 1 Ω
   MCO- - MCO-	Always	Below 1 Ω
   SGND - SGND	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