Overview - Infotainment, Through 10 / 31 / 2008

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 Bus Systems 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 CAB Bus (instrument cluster) to the instrument cluster.

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

MMI 

• Front Information Display Control Head Control Module -J523-, behind the instrument panel
• Multimedia System Control Head -E380- in the center console
• Front Information Display Control Head -J685- in center of the instrument panel
• Radio -R- in the luggage compartment on the left rear side
• 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

1. Front Information Display Control Head -J685- in center of the instrument panel
2. Front Information Display Control Head Control Module -J523-, behind the instrument panel
3. Instrument Cluster Control Module -J285- in the instrument panel
4. Data Bus On Board Diagnostic Interface -J533- Behind the Glove Compartment On the Left Side
5. Radio -R- behind the left luggage compartment side trim panel
6. Satellite Radio -R146- behind the left luggage compartment left side trim
7. Navigation System with CD Drive Control Module -J401- behind luggage compartment left side trim
8. Digital Sound System Control Module -J525- behind the luggage compartment left side trim
9. Telephone Transceiver -R36- under the front passenger seat
10. Multifunction Steering Wheel
11. External Audio Source Connection -R199- in the glove compartment
12. CD Changer -R41- in the instrument panel
13. Steering Column Electronics Control Module -J527- on steering column at steering column switch
14. Multimedia System Control Head -E380- in the center console

Notes On MOST Bus

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

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 .