Radio Systems

Radio Systems

CAUTION!
• Disconnect battery ground wire before working on electrical system.

• On vehicles with Telematics, activate Telephone/Telematics Control Module (J526) service mode before disconnecting Battery (A) => [ Telematics Service Mode, Activating/Deactivating ] Procedures.

If the Battery (A) is reconnected, follow the procedure for disconnecting and connecting the Battery (A) Deactivate Telephone/Telematics Control Module (J526) service mode => [ Telematics Service Mode, Activating/Deactivating ] Procedures.

Only use Radio (R) and components from the Audi program because this is the only way to ensure problem-free installation and optimal reception.

All Radios (R) are coded to Comfort in the instrument cluster (anti-theft coding). When removing and installing the same Radio (R), coding is not necessary after disconnecting voltage supply when removing and installing the same instrument cluster.

Radio generation II+ introduced from KW 45/06.

This used two tuners with "phase diversity" for reception.

Further removal steps are the same as with the "Symphony" radio.

If "Transport" appears in the display after switching on the Radio (R), transport mode must be deactivated.

Diagnosis is performed using "Guided Fault-Finding".

Repairs on antenna wires. => Electrical Equipment -

General Information 97 Removal and Installation.

Repair to CAN bus lines. => Electrical Equipment - General

Information 97 Removal and Installation.

Information on Radio (R) and CD Changer (R41) retrofitting

The connectors for the original Audi Radio (R) are provided in the radio package. Commercial radio units with different connectors must be connected with adapter cable.

When connecting the speed signal, ensure it is not a short circuit. Otherwise, malfunctions can occur in the vehicle.

Using commercially available radios can cause interference with the antenna amplifier because the original Audi Radio (R) has "remotely powered antennas" which receive voltage supply from the Radio (R) via the middle conductor of the high frequency cable. Use the remote power adapter from Audi.

For CD preparation, the CD changer (R41) wiring harness is already installed in the vehicle. The connecting wire can only be used with genuine Audi CD-changers (R41).

Antenna system with Diversity function

The "Symphony"/ from MY04, "Concert"/from MY05 and "Chorus" systems have an antenna system with diversity function. This improves and optimizes reception quality.

In addition to the roof antenna and rear window antenna with amplifier, an antenna in the rear or side with an amplifier is also used.

Individual antennas with amplifier are controlled via the Antenna Selection Control Module (J515) (Diversity box).

The signal going via the antenna wire (HF) from Antenna Selection Control Module (J515) into Radio (R) is checked and the results is output back to the Antenna Selection Control Module (J515) via an additional antenna connection (IF).

If the antenna signal is too weak, the Antenna Selection Control Module (J515) switches to another antenna (diversity function).

This switching process is neither seen nor heard.

The procedure is the same as "switching diversity".

With "phase diversity", the Radio ( R) has two internal tuners with one input each (AM/FM1, FM2).

If the signal received is interrupted, both signals are digitalized and separated in the tuners in the Radio (R) so that the disrupted signals are blocked out as much as possible.

If the reception signal is not disrupted, the Radio (R) constantly compares which antenna (amplifier) has the strongest reception. This is then transferred

In this case, the second tuner checks the frequency band in the background for better reception frequencies for the selected station. If a better signal is found, this tuner switches to reception and the other to the background.

BOSE(R) system with "AudiPilot"

On vehicles with BOSE(R) sound from MY04, an additional microphone, the Inside Microphone (R74) is installed in the Front Interior Light (W1). The Inside Microphone (R74) is switched directly with the Amplifier (R12) (BOSE(R)).

The Amplifier (R12) (BOSE(R)) is then in a position to the adapt the sound characteristics of the BOSE(R) system to the changing interior noise. For example, if the interior noise becomes louder, the volume is then automatically increased according to prescribed sound curves.

The interior noise is less dominant, the sound experience improves.

Function test, see => [ Microphone, Function Test ] Testing and Inspection

Transport mode in "Symphony II+"

The "Symphony" generation II+ has a special protection lock for the internal CD changer.

This is active when the unit is shifted and must be deactivated after installation.

In the same way, the transport protection must be activated before removing the unit.

Transport mode, activating/deactivating => [ Symphony II+, Transport Mode, Activating and Deactivating ] Symphony II+, Transport Mode, Activating and Deactivating