Overview - Radio, MMI Radio Plus (I8S), From My 2017

I8S - MMI Radio Plus 

• Information Electronics Control Module 1 -J794- with integrated CD player/SD card reader in the glove compartment
• The Radio -R- is integrated in the Information Electronics Control Module 1 -J794-
• Multimedia System Control Head -E380- in the center console
• Front Information Display Control Head -J685- (7 inch display) in center of the instrument panel
• External Audio Source Connection -R199- (AUX IN jack and USB charging port) in the center console storage compartment, UE4
• Basic plus sound system, 8RM
• Video input for camera systems
• Bluetooth interface, 9ZX

Optional 

• Digital Radio -R147- integrated in the Information Electronics Control Module 1 -J794-, QV3
• Radio System, Satellite - R146- integrated in the Information Electronics Control Module 1 - J794-, only North America and QV3
• TV Tuner -R78- behind the right luggage compartment trim panel (3-door and 5-door vehicles, Sedan)/behind the right rear side trim panel (Cabriolet), QV1
• Digital Sound System Control Module -J525- under the left front seat, 9VS
• Audi smartphone interface (AUX IN jack and two USB ports with charging and data transfer function) in the center console storage compartment, UE7
• Audi Sound System 9VD
• Bang & Olufsen Sound System, 9VS
• Audi phone box, 9ZE
• Audi connect with Audi phone box, 9ZC
• Multifunction Steering Wheel
• Connectivity packet ready 4 nav (navigation pre-installation), 7UH
• MMI navigation module, 7UF

Courtesy of AUDI OF AMERICA, LLC

1. Roof Antenna -R216-
   • Not for the convertible
2. Front Information Display Control Head -J685- in Center of the Instrument Panel
3. Rear Window Antennas (3-door and 5-door, sedan)/Front and Rear Window Antennas Plus Antennas in the Side Trim Panels (Convertible)
4. Information Electronics Control Module 1 -J794- in the Glove Compartment
5. Multimedia System Control Head -E380- in the Center Console
6. Sound Systems
7. MOST Bus
8. Digital Sound System Control Module -J525- under the Left Front Seat
9. Microphone Unit in Front Roof Module -R164- (Telephone Microphone -R38-) in the Front Interior Lamp -W1-
10. External Audio Source Connection -R199- in the Center Console Storage Compartment

The data exchange for the Bang & Olufsen sound system (9VS) and the TV Tuner -R78- (QV1) occurs through the MOST bus.

The connection to other vehicle systems is established through the CAN bus (Infotainment) and the Data Bus on Board Diagnostic Interface -J533-.

Fault Finding is performed using the "Guided Fault Finding" on the 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 as a "connecting cable". 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 FIBER-OPTIC CABLES, REPAIRING .