CD changer AUDI A4 2002 B5 / 1.G Radio System General Information

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Before troubleshooting or servicing, technicians
must be familiar with the functions and operation
specifics of the applicable standard or optional
radio system. Always read the radio owner's
manual and review all radio, tape player and CD
player/changer functions.

Notes:

When retrofitting, repairing or
troubleshooting:
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Radio installation instructions
For detailed instructions (e.g. removing and
installing trim panels):
Repair Manual, Body Interior, Repair Group
70


Wherever possible, only genuine Audi parts
should be used. Only then can trouble-free
installation and optimal reception be
guaranteed.
All radio systems have anti-theft coding.
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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CD equipment, retrofitting
The wiring set for the CD changer unit is in the
vehicle during production. The connecting cable
can only be used with original Audi CD
changers. Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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"Concert II" and "Symphony II" radio
systems (Sedan), component overview

1 -
CD Changer Unit -R41-
OptionalIn glove compartmentRemoving and installing Page 91
-48
Check wiring Page 91
-50
2 -
Center Mid/High Range Loudspeaker -
R158-
In instrument panelRemoving and installing Page 91
-59
3 -
Radio -R-
In instrument panel, centerRemoving and installing "Concert II" radio
Page 91
-44

Removing and installing "Symphony II"
radio Page 91
-46

Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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"Concert II" and "Symphony II" radio
systems (Avant), component overview

1 -
CD Changer Unit -R41-
OptionalIn glove compartmentRemoving and installing Page 91
-48
Check wiring Page 91
-50
2 -
Center Mid/High Range Loudspeaker -
R158-
In instrument panelRemoving and installing Page 91
-59
3 -
Radio -R-
In instrument panel, centerRemoving and installing "Concert II" radio
Page 91
-44

Removing and installing "Symphony II"
radio Page 91
-46

Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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Radio systems with Satellite Digital Audio
Radio Service (SDARS) (Sedan),
component overview

1 -
CD Changer Unit -R41-
OptionalIn glove compartmentRemoving and installing Page 91
-48
Check wiring Page 91
-50
2 -
Center Mid/High Range Loudspeaker -
R158-
In instrument panelRemoving and installing Page 91
-59
3 -
Radio -R-
In instrument panel, centerRadio "Concert II" Removing and installing
Page 91
-44

Radio "Symphony II" Removing and
installing Page 91
-46

Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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Radio systems with Satellite Digital Audio
Radio Service (SDARS) (Avant),
component overview

1 -
CD Changer Unit -R41-
OptionalIn glove compartmentRemoving and installing Page 91
-48
Check wiring Page 91
-50
2 -
Center Mid/High Range Loudspeaker -R-
158
In instrument panelRemoving and installing Page 91
-59
3 -
Radio -R-
In instrument panel, centerRadio "Concert II" Removing and installing
Page 91
-44

Radio "Symphony II" Removing and
installing Page 91
-46

Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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6 -
Rear Midrange Speakers
In upper rear door trim
7 -
Amplifier -R12- (for rear loudspeakers) In right rear luggage compartment behind
side trim
8 -
Bass Loudspeaker Below rear shelf
9 -
Center Mid/High Range Loudspeaker In instrument panel
10 -
CD Changer Unit -R41- OptionalIn glove compartment
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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7 -
Rear Bass Speakers
In lower rear door trim
8 -
Rear Midrange Speakers In upper rear door trim
9 -
Amplifier -R12- (for rear loudspeakers) In right rear luggage compartment behind
side trim
10 -
Bass Loudspeaker In right rear luggage compartment behind
side trim
11 -
Center Mid/High Range Loudspeaker In instrument panel
12 -
CD Changer Unit -R41- OptionalIn glove compartment
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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"Concert II" and "Symphony II", Multi-pin
connector terminal assignments

Note:
Terminals which are not listed are
vacant/unassigned.

Multi-pin connector I, 20-pin - black
1 - Line output - left rear
2 - Line output - right rear
3 - Line output, Ground (GND)
4 - Line output - left front
5 - Line output - right front
6 - Switched positive for power amplifier
7 - CAN Bus - High (Infotainment)
10 - Ground (GND) (CD changer)
12 - CAN Bus - Low (Infotainment)
13 - CD bus data input (CD changer)
14 - CD bus data output (CD changer)
15 - CD clock (CD changer)
16 - Battery positive B+ (CD changer)
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

Downloaded from www.Manualslib.com manuals search engine 17 - Switched positive for CD changer
18 - Ground (GND) Line output (CD changer)
19 - Line output - left (CD changer)
20 - Line output - right (CD changer)
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication