Microphone Circuit between Multi-display and Navigation ECU: Wiring Diagram

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

   Fig 2: Identifying Multi-Display Connector p1 And Navigation ECU Connector p3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE