Microphone Circuit between Overhead J/B and Multi-display

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

INSPECTION PROCEDURE

1. INSPECT MULTI-DISPLAY

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)

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

2. 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