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

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Radio system

General information


CAUTION!

Before beginning repairs on the electrical
system:

Obtain anti-theft radio security code if
necessary.
Switch the ignition off.
Disconnect battery Ground (GND) strap.
On vehicles equipped with Audi Telematics
by OnStar , switch-off the emergency (back-
up) battery for the Telematic/Telephone
Control Module prior to disconnecting
vehicle battery. Use VAS 5051 Vehicle
Diagnostic, Testing and Information System
in mode "Guided Fault Finding" Page 91
-
119
.

After reconnecting vehicle battery, re-code
anti-theft radio if necessary and check
operation. Also check operation of clock and
power windows according to Repair Manual
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

Downloaded from www.Manualslib.com manuals search engine and/or Owner's Manual.
After reconnecting vehicle battery on
vehicles equipped with Audi Telematics by
OnStar , switch-on the emergency (back-
up) battery for the Telematic/Telephone
Control Module. Use VAS 5051 Vehicle
Diagnostic, Testing and Information System
in mode "Guided Fault Finding" Page 91
-
119
.

Note:
Further measures after reconnecting the voltage
supply:
Repair Manual, Fuel Injection & Ignition,
Repair Group 24 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

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"Concert II" and "Symphony II" radio systems
with "BOSE sound system", 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 BOSE power amplifier7 - 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

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BOSE amplifier, multi-pin connector
assignments

Multi-pin connector, 25-pin
1 - Center mid/high range loudspeaker (+)
2 - Center mid/high range loudspeaker (-)
6 - Line output - Ground (GND) (from Radio)
7 - Line output - right rear (from Radio)
8 - Line output - left rear (from Radio)
9 - Line output - right front (from Radio)
10 - Line output - left front (from Radio)
11 - Ground (GND) (terminal 31)
13 - Battery B+ (terminal 30)
14 - Bass loudspeaker (+)
15 - Bass loudspeaker (-)
16 - Loudspeaker (-) left front
17 - Loudspeaker (+) left front
18 - Loudspeaker (+) right front
19 - Loudspeaker (-) right front
20 - Loudspeaker (+) left rear
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication

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Multi-pin connector, 32-pin
1 - Battery B+ (terminal 30)
2 - Ground (GND) (terminal 31)
3 - Bass loudspeaker (+)
4 - Loudspeaker (-) left rear
5 - Loudspeaker (+) right rear
6 - Switched positive (from Radio)
7 - Line output - Ground (GND) (from Radio)
13 - Center mid/high range loudspeaker (+)
14 - Center mid/high range loudspeaker (-)
15 - Bass loudspeaker (-)
16 - Loudspeaker (+) left rear
17 - Loudspeaker (-) right rear
19 - Line output - left front (from Radio)
20 - Line output - right front (from Radio)
21 - Line output - left rear (from Radio)
22 - Line output - right rear (from Radio)
26 - Loudspeaker (-) right front
27 - Loudspeaker (+) right front
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication