Infotainment Overview, Through 10 / 27 / 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 are performed 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.

Equipment Versions: 

MMI Basic 

• The Front Information Display Control Head Control Module -J523- in the glove compartment contains the Radio -R- / CD-Player -R89-
• CD Changer -R41- in the instrument panel
• External Audio Source Connection -R199- in the center console storage compartment
• Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
• Basic / Basic Plus / Standard / Bang and Olufsen
• Multimedia System Control Head -E380- in the center console
• Front Information Display Control Head -J685- in center of the instrument panel
• Digital Radio -R147- on the left side in the rear of the luggage compartment
• Cellular Telephone Preparation / Bluetooth Auto Telephone
• Multifunction Steering Wheel

MMI Basic Plus Navigation 

• The Front Information Display Control Head Control Module -J523- located in the glove compartment contains the Radio -R- / CD-Player -R89- / Navigation System with CD Drive Control Module -J401-
• CD Changer -R41- in the instrument panel
• External Audio Source Connection -R199- in the center console storage compartment
• Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
• Basic / Basic Plus / Standard / Bang and Olufsen
• Multimedia System Control Head -E380- in the center console
• Front Information Display Control Head -J685- in center of the instrument panel
• Digital Radio -R147- on the left side in the rear of the luggage compartment
• Cellular Telephone Preparation / Bluetooth Auto Telephone
• Multifunction Steering Wheel

Fig 1: Identifying MMI Basic / Basic Plus Navigation System

Courtesy of AUDI OF AMERICA, LLC

1. Instrument Cluster Control Module -J285- in the instrument panel
2. Steering Column Electronics Control Module -J527- on steering column at steering column switch
3. Multifunction Steering Wheel
4. Front Information Display Control Head -J685- in center of the instrument panel
5. Multimedia System Control Head -E380- in the center console
6. Radio / Telephone / Navigation System Antenna -R52-, Roof Antenna
7. Rear window antennas
8. Antenna Amplifier 3 -R112- Behind the Left C-Pillar Trim
9. Front Information Display Control Head Control Module -J523- Inside Glove Compartment
   • MMI basic includes Radio -R- / CD-Player -R89-
   • MMI basic plus Navigation contains the Radio -R- / CD-Player -R83- / Navigation System with CD Drive Control Module -J401-
10. Data Bus On Board Diagnostic Interface -J533- Behind the Glove Compartment On the Left Side
11. CD Changer -R41- in the instrument panel

    External Audio Source Connection -R199- (AUX IN) Inside The Center Console Storage Compartment 

12. Telephone Transceiver -R36- under the front passenger seat
13. Digital Sound System Control Module -J525- behind the luggage compartment left side trim
14. Digital Radio -R147- behind the left luggage compartment left side trim

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
• Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
• Radio -R- (with Speech Input Control Module -J507-) located in luggage compartment (left rear)
• Sound system: Standard / Bang & Olufsen
• CD Changer -R41- in the upper center console
• 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
• TV Tuner -R78- on the left side of the luggage compartment in the rear
• Digital Radio -R147- on the left side in the rear of the luggage compartment
• Cellular Telephone Preparation / Bluetooth Auto Telephone
• Multifunction Steering Wheel

Fig 2: Identifying Data Bus On Board Diagnostic Interface With MMI, Overview

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- optional with Speech Input Control Module -J507- behind left luggage compartment side trim
6. Digital Radio -R147- behind the left luggage compartment left side trim
7. TV Tuner -R78- behind the left luggage compartment side trim panel
8. Navigation System with CD Drive Control Module -J401- behind luggage compartment left side trim
9. Digital Sound System Control Module -J525- behind the luggage compartment left side trim
10. Telephone Transceiver -R36- under the front passenger seat
11. Multifunction Steering Wheel
12. CD Changer -R41- in the instrument panel

    External Audio Source Connection -R199- In The Glove Compartment 

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 .