1996 AUDI A4 Radio System Workshop Manual

91-15

Multi-pin connectors I, II, III, IV (on back of
radio), terminal assignments

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

20-pin connector I
1 - Line out, left-rear
2 - Line out, right-rear
3 - Low frequency Ground (GND)
4 - Line out, left-front
5 - Line out, right-front
6 - Switched positive supply (B+) for BOSE amplifier
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91-16


8-pin connector II (brown) 8 - Clock signal
9 - Data signal
10 - Enable signal
13 - Bus data in (CD changer)
14 - Bus data out (CD changer)
15 - Clock (CD changer)
16 - Continuous positive supply (B+)
17 - Switched positive supply (B+) (CD changer)
18 - Low frequency-Ground (GND) (CD changer)
19 - Signal wire left channel (CD low frequency-L)
20 - Signal wire right channel (CD low frequency-R)
5 - Hands-free speaker (+)
6 - Hands-free speaker (-)
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91-17


8-pin connector III (black)
10-pin connector IV (red) 1 - Vehicle speed sensor (Gala)
3 - K-Diagnosis
4 - Terminal 86s connection for ignition key switched on and off (S-
contact)
6 - Illumination (terminal 58d)
7 - Terminal 30
8 - Ground (GND) (terminal 31)
1 - Telephone mute switch
3 - Telephone (low frequency +)
4 - Telephone (low frequency -)
5 - Navigation (low frequency +) (not applicable US/Canada)
6 - Navigation (low frequency -) (not applicable US/Canada)
7 - Navigation control line not (not applicable US/Canada)
9 - Display illumination (terminal 58d)
10 - CD Ground (GND)
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91-18


Radio system, overview (sedan)

1 -
Radio
In center consoleRemoving and installing page 91
-23
2 -
BOSE amplifier
In luggage compartment (left-rear) under
parcel shelf Removing and installing page 91
-35
3 -
Antenna amplifier
In left D-pillar trimRemoving and installing page 91
-39
4 -
Rear window antenna
Upper 3 wires are AM antenna (non-
heated) Remaining wires are FM antenna (heated)Removing and installing Repair Manual, Body Exterior, Repair Group 64
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91-19


5 -
CD changer
In luggage compartment (lower-left)Removing and installing page 91
-31
Checking cable page 91
-34
6 -
Mid-range/treble speaker
In front door trim (top)Removing and installing page 91
-28
7 -
Bass speaker
In front door trim (bottom)Removing and installing page 91
-27
8 -
Broad band speaker
In rear door trim (only with BOSE sound
system) Removing and installing page 91
-30
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91-20


9 -
Speaker in parcel shelf
Broad band speakerRemoving and installing page 91
-29
Bass speaker (only with BOSE sound
system) Removing and installing page 91
-29
10 -
Telephone speaker
With standard radio equipment, speakers
in front door trim are also used as
telephone speakers For radios with BOSE sound system,
telephone speaker is in front door trim on
driver's side
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91-21


Radio system, overview (Avant)

1 -
Radio
In center consoleRemoving and installing page 91
-23
2 -
Bass speaker
In front door trim (bottom)Removing and installing page 91
-27
3 -
Mid-range/treble speaker
In front door trim (top)Removing and installing page 91
-28
4 -
Broad band speaker
In rear door trimRemoving and installing page 91
-30
5 -
Antenna base
With integrated amplifier
6 -
Roof antenna With radio and telephone system,
combination antenna is used Removing and installing page 91
-40
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91-22


7 -
CD changer
In luggage compartment (left-rear) under
cargo area storage bin Removing and installing page 91
-32
Checking cable between radio and CD
changer page 91
-34

8 -
BOSE amplifier combined with bass
speaker (subwoofer) only with "Concert
with BOSE sound system"
In cargo area (left-rear) under side trimRemoving and installing page 91
-37
9 -
Bass speaker (subwoofer) only with
"Concert" radio
In cargo area (left-rear) under side trimRemoving and installing page 91
-37
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