AUDI A4 1997 B5 / 1.G Radio System User Guide
Manufacturer: AUDI, Model Year: 1997, Model line: A4, Model: AUDI A4 1997 B5 / 1.GPages: 45, PDF Size: 0.52 MB
Page 11 of 45

91-9
 
    
8-pin connector III (black) 
1 - Vehicle speed sensor (Gala)
2 - Low frequency mute switch (telephone system)
3 - Terminal 30
4 - Terminal 86s connection for ignition key switched on and off (S-
contact)
5 - Switched positive supply (B+) for antenna amplifier
6 - Illumination (terminal 58d)
7 - Terminal 30
8 - Ground (GND) (terminal 31)
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Page 12 of 45

91-10
      
Radio system, overview (m.y. 1998  )
 
     
"Concert" radio (sedan)  
    
"Concert" radio (Avant)   1 - Rear window antenna with antenna amplifier
2 - Bass speaker in front door trim (bottom)
3 - Mid-range/treble speaker in front door trim (top)
4 - Broad band speaker (active with double amplifier) in parcel shelf (left-
rear)
5 - Broad band speaker (passive) in parcel shelf (right-rear)
6 - CD changer (optional) in luggage compartment (left-rear)
    
1 - Roof antenna with antenna amplifier
2 - Bass speaker in front door trim (bottom)
3 - Mid-range/treble speaker in front door trim (top)
4 - Broad band speaker (2-way) in rear door trim
5 - Bass speaker (subwoofer) in left-rear of cargo area under side trim
6 - CD changer (optional) in left-rear of cargo area under storage 
compartment
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Page 13 of 45

91-11
      
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)
6 - Switched positive supply (B+) for active speaker (sedan) and/or 
subwoofer (Avant)
8 - Clock signal
9 - Data signal
10 - Enable signal
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Page 14 of 45

91-12
 
    
8-pin connector II (brown)  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 for left channel (CD low frequency-L)
20 - Signal wire for right channel (CD low frequency-R)
3 - Speaker line, right-front (+)
4 - Speaker line, right-front (-)
5 - Speaker line, left-front (+)
6 - Speaker line, left-front (-) 
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Page 15 of 45

91-13
 
    
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 low frequency 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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Page 16 of 45

91-14
      
"Concert" radio with BOSE sound system 
(sedan)  
    
"Concert" radio with BOSE sound system (Avant)   1 - Rear window antenna with antenna amplifier
2 - Telephone speaker 
3 - BOSE amplifier in luggage compartment (left-rear)
4 - Bass speaker in front door trim (bottom)
5 - Mid-range/treble speaker in front door trim (top)
6 - Broad band speaker in rear door trim
7 - Bass speaker in parcel shelf
8 - CD changer (optional) in luggage compartment (left-rear)
    
1 - Roof antenna with antenna amplifier
2 - Telephone speaker 
3 - BOSE amplifier combined with bass speaker (subwoofer) in cargo 
area (left-rear) under side trim
4 - Bass speaker in front door trim (bottom)
5 - Mid-range/treble speaker in front door trim (top)
6 - Broad band speaker in rear door trim
7 - CD changer (optional) in cargo area (left-rear) under storage 
compartment
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Page 17 of 45

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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Page 18 of 45

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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Page 19 of 45

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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Page 20 of 45

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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