Overview - Infotainment System, MMI Radio Plus, 18E

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On the "MMI Radio plus" Infotainment system, the following functions are integrated in the Information Electronics Control Module 1 -J794- :

MMI Radio plus Infotainment System Properties

Information Electronics Control Module 1 -J794- with integrated CD player/SD card reader in the glove compartment
Multimedia System Control Head -E380- in the center console, UJ0
Front Information Display Control Head -J685-, 7 inch display, in the center of the instrument panel
External Audio Source Connection -R199- in the center console storage compartment, USB charging, AUX IN, UE4
Sound system: basic sound, 8RM
Video input for rearview camera system, KA2
Bluetooth interface, 9ZX
Multifunction Steering Wheel

Optional

Digital Radio -R147- integrated in the Information Electronics Control Module 1 -J794-, only Europe/Rest of World and QV3
Radio System, Satellite -R146- integrated in the Information Electronics Control Module 1 -J794-, only USA and QV3
Digital Sound System Control Module -J525- in the left rear side of the luggage compartment, 9VS
Instrument Cluster Control Module -J285-, color display in the instrument cluster, 9S7
External Audio Source Connection -R199- in center console storage compartment, USB (quantity: 2), AUX IN, UE7
Sound System: Audi Sound System, 9VD
Bang & Olufsen Sound System, 9VS
Audi phone box, 9ZE

Courtesy of AUDI OF AMERICA, LLC

Front Information Display Control Head -J685-, Display in Center of the Instrument Panel
Rear Window Antennas
Information Electronics Control Module 1 -J794- in the Glove Compartment
Multimedia System Control Head -E380- in the Center Console
Driver Volume Control -E67- in the Center Console
MOST Bus
Digital Sound System Control Module -J525- in Luggage Compartment on Left Rear Side
External Audio Source Connection -R199- in the rear center console storage compartment
Sound Systems

The MOST bus performs the system data exchange in the CAN bus and MMI.

Fault Finding is performed using the "Guided Fault Finding". Refer to Vehicle Diagnostic Tester.

Notes on MOST bus

The optical data bus "MOST bus" is used in addition to the CAN bus.

A fiber-optic cable is used. Fiber optic cables are routed inside corrugated tubes for protection.

Replace the complete fiber-optic cable if possible.

The front surface of the connectors must not be contaminated.

If disconnecting the connectors: Attach the :VAS6223/9 .

Fig 1: Fiber-Optic Conductor Repair Set VAS 6223A

Courtesy of AUDI OF AMERICA, LLC

When routing fiber-optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink fiber optic cables.

Repairing fiber-optic cables. Refer to GENERAL REPAIR INFORMATION .