Overview - TV System

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

The TV system (QU1) is part of the MMI Infotainment system.

The TV Tuner -R78- is connected via the MOST bus to the other Infotainment system components. Operation is performed via the Multimedia System Control Head -E380-.

Courtesy of AUDI OF AMERICA, LLC

Roof Antenna -R216-
Front Information Display Control Head -J685-, Display in Center of the Instrument Panel
Multimedia System Control Head -E380- in the Center Console
Information Electronics Control Module 1 -J794- in the Glove Compartment
External Audio Source Connection -R199- in the Center Console Storage Compartment
MOST Bus
Digital Sound System Control Module -J525- in Luggage Compartment on Left Rear Side
TV Tuner -R78- in the Right Rear of the Luggage Compartment
Microphone Unit in Front Roof Module -R164- in the Front Interior Lamp -W1-

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

Antenna wires, repairing. Refer to ANTENNA WIRES, REPAIRING .

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: 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 the fiber-optic cables.

Repairing fiber-optic cables. Refer to GENERAL REPAIR INFORMATION .