Visual Mute Signal Circuit between Navigation ECU and Multi-display: Procedure

INSPECT MULTI-MEDIA MODULE WIRE

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

Fig 1: Identifying F37 Multi-Media Module Wire Connector

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Standard Voltage

Tester Connection	Condition	Specified Condition
F37-9 (VMT1) - Body ground	Power switch on (ACC), screen display changes.	3.5 V or higher → Below 1 V → 3.5 V or higher

TEXT IN ILLUSTRATION

*1	Component with harness connected (Multi-media Module Wire)

NG → See step 2

OK → See step 5

CHECK HARNESS AND CONNECTOR

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

Standard Resistance

Tester Connection	Condition	Specified Condition
F37-9 (VMT1) - F31-11 (VMTF)	Always	Below 1 Ω
F37-9 (VMT1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

REPLACE MULTI-MEDIA MODULE WIRE
1. Replace the multi-media module wire and check if the navigation system operates normally. Refer to DISASSEMBLY .
  OK
  
  The navigation system operates normally.
NG → See step 4

OK → END
REPLACE MULTI-DISPLAY
1. Replace the multi-display and check if the navigation system operates normally. Refer to DISASSEMBLY .
  OK
  
  The navigation system operates normally.
NG → See step 6

OK → END
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL