Overview - Infotainment System, USA, Through 11/03/2008

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The data for the infotainment, telephone, navigation, voice control system, audio players, sound system and Data Bus On Board Diagnostic Interface -J533- is transmitted via the fiber optic MOST Bus.

The connection to the other data busses in the vehicle is provided by the Data Bus On Board Diagnostic Interface -J533-.

The central control unit is the Front Information Display Control Head Control Module -J523-. The signals required to display information on the instrument cluster display are transmitted via the MOST Bus to the Front Information Display Control Head Control Module -J533- and from there via the CAN Bus to the instrument cluster.

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

MMI

Front Information Display Control Head Control Module -J523-, behind the instrument panel
Multimedia System Control Head -E380- in the front of the center console
Front Information Display Control Head -J685- in center of the instrument panel
Radio -R- (with Speech Input Control Module -J507-) located in luggage compartment (left rear)
Satellite Radio -R146- in left rear of luggage compartment
Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
Sound system: Standard/Bang & Olufsen
CD Changer -R41- in the instrument panel
External Audio Source Connection -R199- in the glove compartment/center console storage compartment
Navigation System with CD Drive Control Module -J401- in luggage compartment, left rear
Cell Phone Preparation
Multifunction Steering Wheel

Fig 1: Identifying MMI System, Layout

Courtesy of AUDI OF AMERICA, LLC

Front Information Display Control Head -J685- in Center of the Instrument Panel
Front Information Display Control Head Control Module -J523-, Behind the Instrument Panel
Instrument Cluster Control Module -J285- in the Instrument Panel
Data Bus On Board Diagnostic Interface -J533- Behind the Glove Compartment On the Left Side
Radio -R- Optional with Speech Input Control Module -J507- Behind Left Luggage Compartment Side Trim
Satellite Radio -R146- Behind the Left Luggage Compartment Left Side Trim
Navigation System with CD Drive Control Module -J401- Behind Luggage Compartment Left Side Trim
Digital Sound System Control Module -J525- Behind the Luggage Compartment Left Side Trim
Telephone Transceiver -R36- Under the Front Passenger Seat
Multifunction Steering Wheel
External Audio Source Connection -R199- in the Glove Compartment
CD Changer -R41- in the Instrument Panel
Steering Column Electronics Control Module -J527- on Steering Column At Steering Column Switch
Multimedia System Control Head -E380- in the Front of the Center Console

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 2: 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 Fiber-Optic Cables, Repairing .