Microphone Circuit Between Overhead Junction Block and Multi-Display: Procedure

1. Disconnect the overhead J/B connector Q2 and multi-display connector E63.
   Fig 1: View Of Q2 Overhead J/B Connector And Multi-Display Connector E63

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   ACC - MACC	Always	Below 1 Ω
   MI1+ - MIN+	Always	Below 1 Ω
   MIC- - MIN-	Always	Below 1 Ω
   TSW- - SGND	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: Go to next step 

1. Reconnect the multi-display connector E63.
   Fig 2: Identifying Multi-Display Connector E63

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   MACC - Body ground	Engine switch on (ACC)	4 to 6 V

NG → REPLACE MULTI-DISPLAY 

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