Overview - Infotainment System, MMI Navigation, 7T2

7T2 - MMI Navigation 

Information Electronics Control Module 1 -J794- with CD player/SD card reader/navigation system integrated in the instrument panel

• Radio -R- integrated in the Information Electronics Control Module 1 -J794-, 8DP
• Front Information Display Control Head -J685- (display) in center of the instrument panel
• Multimedia System Control Head -E380- in the center console, QW1
• CD Changer -R41- in glove compartment, 7A2
• External Audio Source Connection -R199- in the center console, UF7
• Digital Sound System Control Module -J525- in the luggage compartment on the left rear side
• Sound systems: Standard/BOSE, 9VD/8RY
• Bluetooth interface, 9ZX
• Optional cell phone preparation, 9ZF
• Optional integrated Digital Radio -R147-, QV3
• Optional integrated Satellite Radio -R146-, only USA and QV8
• Voice recognition system, QH1

Fig 1: Overview Of Navigation System

Courtesy of AUDI OF AMERICA, LLC

1. Roof Antenna -R216-
2. Front Information Display Control Head -J685- in center of the instrument panel
3. Multimedia System Control Head -E380- in the center console
4. Information Electronics Control Module 1 -J794- inside the instrument panel
5. External Audio Source Connection -R199- in the center console
6. Data Bus On Board Diagnostic Interface -J533- under the rear bench seat
7. Digital Sound System Control Module -J525- behind the left luggage compartment trim panel
8. MOST bus
9. CD Changer -R41- in glove compartment
10. Microphone Unit in Front Roof Module -R164- (Left Front Microphone -R140-) in the Front Interior Lamp -W1-

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

The connection to the other Data bus systems in the vehicle are provided by the Data Bus On Board Diagnostic Interface -J533-.

Fault finding is performed via "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 complete fiber optic cable if possible.

The front surface of the connectors must not be dirty.

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. Refer to FIBER OPTIC CABLE .