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Home >> Infiniti >> 2012 >> QX56 AWD V8-5.6L (VK56VD) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Testing and Inspection >> Component Tests and General Diagnostics >> Composite Image Signal Circuit (AV Control Unit To Front Display Unit)
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Composite Image Signal Circuit (AV Control Unit To Front Display Unit)




COMPOSITE IMAGE SIGNAL CIRCUIT (AV CONTROL UNIT TO FRONT DISPLAY UNIT)

Description

- DVD is played by inserting DVD into the AV control unit.
- DVD image signals are transmitted to the front display unit and video distributor.
- AV control unit receives the image signal from the front auxiliary input jacks and then transmits it to the front display unit.
- AV control unit receives the image signal from the USB (video data) and then transmits it to the front display unit and video distributor.
- Video distributor receives the image signal from the AV control unit and then transmits it to the headrest display unit.


Diagnosis Procedure


1. CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect AV control unit connector and front display unit connector.
3.Check continuity between AV control unit harness connector and front display unit harness connector.





4.Check continuity between AV control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair harness or connector.

2. CHECK COMPOSITE IMAGE SIGNAL

1.Connect AV control unit connector and front display unit connector.
2.Turn ignition switch ON.
3.Check signal between AV control unit harness connector and ground.





Is the inspection result normal?
YES- Replace front display unit. Service and Repair.
NO- Replace AV control unit. Service and Repair.
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