General outline of infotainment system. Audi A3 ’04

Infotainment

General outline of infotainment system

The Audi A3 ’04 has a separate infotainment

CAN data bus, which is connected to the data bus diagnostic interface J533.

Diagnosis can be performed by way of this

CAN bus for all infotainment components with the exception of the navigation system with CD drive control unit J401 (diagnosis still via K-wire) and the BOSE amplifier R12.

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1 Dash panel insert J285

2 Function selection switch II E272

3 Additional heater J364

4 Diagnostic connection T16

5 Steering column electronics J527

6 Multifunction steering wheel E221

(optional)

7 Telephone transmitter and receiver unit

R36

8 Telephone bracket R126

9 Radio R and CD changer R41, connected via separate data bus

10 Amplifier with bass loudspeaker R44

11 Navigation system with CD drive control unit J401

12 Data bus diagnostic interface J533

Data are exchanged with the multifunction steering wheel E221 via the central data bus diagnostic interface J533 and the convenience CAN. For this purpose, the steering column electronics J527 convert the

LIN signals of the multifunction steering wheel into CAN messages.

The messages are relayed to the appropriate control units in the infotainment CAN and dash panel insert CAN by way of the convenience CAN and the data bus diagnostic interface J533.

Radio/telephone data and navigation information are presented on the centre display of the dash panel insert J285. This involves the data records being passed from the control units via the infotainment CAN to the data bus diagnostic interface J533 and relayed from there by way of the dash panel insert CAN.

The speed-dependent volume control GALA makes use of the network.

The corresponding signal is passed by the data bus diagnostic interface J533 from the drive system CAN to the infotainment CAN, thus making it available to the control units which use the GALA signal.

The navigation system is operated by means of function selection switch II E272 in the centre console as in the Audi A4 '01. This switch is connected directly to the dash panel insert J285. Signals from the function selection switch are converted by the dash panel insert into CAN messages, which are relayed via the dash panel insert CAN, data bus diagnostic interface J533 and infotainment CAN to the navigation control unit J401.

The additional heater J364 is also integrated into the infotainment CAN.

Information on the additional heater

J364 can be found in Self Study

Programme 290 (Audi A3 ´04 Technical

Features).

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