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"concert” radio system > < "chorus” radio system

A3 Mk1

Contact assignment of multi-pin connectors I, II, III, IV
Contact assignment of multi-pin connectors I, II, III, IV
  Note!
Contacts not listed are not used.
   
20-pin connector I
1 - Rear left signal
2 - Rear right signal
3 - Signal earth
6 - Switched positive (amplifier with bass loudspeaker)
7 - CAN bus High (infotainment) (as of MY 02)
8 - Clock signal (up to MY 01)
9 - Data signal (up to MY 01)
10 - Enable signal (up to MY 01)
12 - CAN bus Low (infotainment) (as of MY 02)
Brown 8-pin connector II
3 - Front right loudspeaker (+)
4 - Front right loudspeaker (-)
5 - Front left loudspeaker (+)
6 - Front left loudspeaker (-)
Black 8-pin connector III
1 - GALA (vehicle-speed signal) (up to MY 01)
2 - Anti-theft alarm earth (as of MY 02)
3 - K-wire (diagnosis)
4 - S-contact (terminal 86s) (up to MY 01)
6 - Switch illumination (terminal 58s) (up to MY 01)
7 - Battery + (terminal 30)
8 - Earth (terminal 31)
Red 10-pin connector IV
1 - AF mute (from telephone)
2 - Terminal 15 (navigation system only) (up to MY 01)
3 - Telephone (AF +) (not with navigation system)
4 - Telephone (AF -) (not with navigation system)
5 - Navigation (AF+) (navigation system only)
6 - Navigation (AF-) (navigation system only)
7 - Navigation system (control wire)
9 - Display illumination (terminal 58d) (up to MY 01)
  A91-0079

"concert” radio system > < "chorus” radio system