Overview - Infotainment System, MMI Radio Plus, 18E

On the "MMI Radio plus" Infotainment system, the following functions are integrated in the Information Electronics Control Module 1 -J794- :

• Information Electronics Control Module 1 -J794- with integrated CD player/SD card reader in the glove compartment
• Multimedia System Control Head -E380- in the center console, UJ0
• Front Information Display Control Head -J685-, 7 inch display, in the center of the instrument panel
• External Audio Source Connection -R199- in the center console storage compartment, USB charging, AUX IN, UE4
• Sound systems: Basic Sound/Audi sound system, 8RM/9VD
• Radio -R- integrated in the Information Electronics Control Module 1 -J794-
• Video input for rearview camera system, KA2
• Bluetooth Hands-Free Calling, 9ZX

Optional

• Digital Radio -R147- integrated in the Information Electronics Control Module 1 -J794-, only Europe/Rest of World and QV3
• Radio System, Satellite -R146- integrated in the Information Electronics Control Module 1 -J794-, only USA and QV3
• Digital Sound System Control Module -J525- on the left rear side of the luggage compartment, 9VS only
• Instrument Cluster Control Module -J285-, instrument cluster display, 9S7
• Sound system: Premium Sound System Bang & Olufsen, 9VS
• External Audio Source Connection -R199- in center console storage compartment, USB (quantity: 2), AUX IN, UE7
• Audi phone box, 9ZE
• Multifunction Steering Wheel

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

Courtesy of AUDI OF AMERICA, LLC

1. Front Information Display Control Head -J685-, display in center of the instrument panel
2. Multimedia System Control Head -E380- in the Center Console
3. CAN Bus
4. Information Electronics Control Module 1 -J794- in the Glove Compartment
5. External Audio Source Connection -R199- in the Center Console Storage Compartment
6. MOST Bus
7. Digital Sound System Control Module -J525- in luggage compartment on left rear side
8. Antenna Amplifier
9. Rear Window Antennas

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

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. 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 Fiber-Optic Repair Set - Connector Protective Caps: VAS 6223/9  .

When routing fiber-optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink the fiber-optic cables.

Repairing fiber optic cables. Refer to FIBER-OPTIC CABLES, REPAIRING .