Infotainment Assembly, USA From 11/03/2008

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The MMI from 11/03/2008 an advancement of the MMI currently in use. The control module functions, cell phone preparation, external audio source connection, CD and DVD drives, navigation (with hard disc drive) and voice recognition system are integrated all together in one unit Information Electronics Control Module 1 -J794-.

The Radio - R- /CD Changer -R41- and the Digital Sound System Control Module -J525- are connected via the MOST Bus. The basis sound systems are controlled directly by the Radio -R-. Satellite Radio -R146- (SDARS) is an optional integration in the Radio -R-

MMI Maximum Equipment

The Information Electronics Control Module 1 -J794- inside the instrument panel contains the CD player/DVD player/navigation system/cell phone preparation/voice recognition system/SD memory card reader
Internal hard drive disc storage (HDD) for storing navigation data and MP3 files
Multimedia System Control Head -E380- in the front of the center console
Front Information Display Control Head -J685- in center of the instrument panel
The CD Changer -R41- /optional External Audio Source Connection -R199- in the glove compartment, interface
External Audio Source Connection -R199- in the center counsel storage compartment, AUX IN socket
Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
Sound system: Standard/Bang & Olufsen
Radio -R- on the left rear side of the luggage compartment is optional with Satellite Radio -R146-
Optional multifunction steering wheel
Optional Bluetooth hands-free equipment
WLAN (from MY 13)

Fig 1: Identifying MMI (From 1 June 2009)

Courtesy of AUDI OF AMERICA, LLC

Multimedia System Control Head -E380- in the Front of the Center Console
Radio/Telephone/Navigation System Antenna -R52-
Front Information Display Control Head -J685- in Center of the Instrument Panel
Radio/Telephone/Navigation System Antenna -R52-
Microphone Unit in Front Roof Module -R164- (Left Front Microphone -R140-) in the Front Interior Lamp -W1-
Not Installed
Information Electronics Control Module 1 -J794- Inside the Instrument Panel
MOST Bus
CVBS Cable
CD Changer -R41- in Glove Compartment
Not Installed
External Audio Source Connection -R199- in the Center Counsel Storage Compartment, AUX IN Socket
Radio -R- Behind the Left Luggage Compartment Side Trim Panel
Digital Sound System Control Module -J525- Behind the Luggage Compartment Left Side Trim
Data Bus On Board Diagnostic Interface -J533- Behind the Glove Compartment On the Left Side
Microphone Unit in Front Roof Module -R164- (Right Front Microphone -R141-) in the Front Interior Lamp -W1-

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

The connection to the other Data bus systems in the vehicle are provided by the Data Bus On Board Diagnostic Interface -J533-.

Fault finding is performed via "Guided Fault Finding " see Vehicle Diagnostic Tester.

Information Electronics Control Module 1 -J794- Overview

Information Electronics Control Module 1 -J794- is a 3rd generation MMI. Depending on the equipment level, the Information Electronics Control Module 1 -J794- contains the following known control modules from the 2nd generation:

Fig 2: Identifying Information Electronics Control Module 1 -J794- MMI Overview

Courtesy of AUDI OF AMERICA, LLC

Front Information Display Control Head Control Module -J523-
CD Player -R89-
Navigation System with CD Drive Control Module -J401-
Telephone Card Reader -R115- /SD Card Reader
Speech Input Control Module -J507-
Not Installed
Telephone Transceiver -R36-, Cell Phone Preparation
Internal Hard Drive Disc Storage (HDD)
Information Electronics Control Module 1 -J794-

Radio -R- Components, MMI

Depending on the equipment level, the Radio -R- contains the following known 2nd generation control modules:

Fig 3: Identifying Radio -R- MMI Overview

Courtesy of AUDI OF AMERICA, LLC

Digital Sound System Control Module -J525-
Radio -R-
Radio -R-, AM/FM-Tuner
Satellite Radio -R146-
Not Installed

MOST Bus Overview

Fig 4: Identifying MOST Bus MMI

Courtesy of AUDI OF AMERICA, LLC

Front Information Display Control Head -J685-
Information Electronics Control Module 1 -J794-
MOST Bus
CD Changer -R41-
Not Installed
Radio -R-
Digital Sound System Control Module -J525-
Data Bus On Board Diagnostic Interface -J533-
Multimedia System Control Head -E380-

Notes on MOST bus

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

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

Replace complete fiber optic cable if possible.

Make sure that the face surfaces of the connectors do not become soiled.

If disconnecting the connectors: Attach Fiber-Optic Repair Set - Connector Protective Caps VAS6223/9.

Fig 5: Fiber Optic Plier Repair Set VAS 6223

Courtesy of AUDI OF AMERICA, LLC

When installing 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 Fiber-Optic Cables, Repairing .