Wiring Diagram AUDI A4 2008 - Navigation system with CD drive control unit - fuses
| D | Ignition/starter switch |
| J401 | Navigation system with CD drive control unit |
| S5 | Fuse in relay plate fuse holder |
| S15 | Fuse in relay plate fuse holder |
| T8e | 8-pin connector, black, on navigation system with CD drive control unit |
| 346 | Earth connection (audio), in dash panel wiring harness |
| 501 | Screw connection 2 (30), on relay plate |
| 610 | Earth point (audio), under centre console, front |
| A2 | Positive connection (15), in dash panel wiring harness |
| A32 | Positive connection (30), in dash panel wiring harness |
| A50 | Positive connection (30as), in dash panel wiring harness |
| A57 | Positive connection 3 (30), in dash panel wiring harness |
| A74 | Connection (15a, fuse 5), in dash panel wiring harness |
Wiring Diagram AUDI A4 2008 - Navigation system with CD drive control unit - radio
| J401 | Navigation system with CD drive control unit |
| J515 | Aerial selection control unit |
| R | Radio |
| R1 | Aerial connection |
| R50 | Navigation system aerial |
| T10l | 10-pin connector, red, radio connector IV |
| T20e | 20-pin connector, black, on navigation system with CD drive control unit |
| A129 | Connection (muting), in dash panel wiring harness |
| V49 | Connection (NF +), in communication wiring harness |
| V50 | Connection (NF -), in communication wiring harness |
| * | only for models with radio / telephone, is dropped, from model year 2006 |
| ** | for models with radio only |
| *** | ⇒ applicable Current Flow Diagram: telephone / telematics |
| **** | Aerial for Avant models |
| ***** | Aerial for saloon models |
Wiring Diagram AUDI A4 2008 - Navigation system with CD drive control unit - control unit in dash panel insert
| J104 | ABS control unit |
| J285 | Control unit in dash panel insert |
| J401 | Navigation system with CD drive control unit |
| J519 | Onboard supply control unit |
| T8e | 8-pin connector, black, on navigation system with CD drive control unit |
| T16 | 16-pin connector, black, diagnostic connector |
| T17b | 17-pin connector, green, coupling station on left of A-pillar |
| T20e | 20-pin connector, black, on navigation system with CD drive control unit |
| T23 | 23-pin connector, black, on onboard supply control unit |
| T32 | 32-pin connector, blue, on dash panel insert |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A87 | Connection (RL), in dash panel wiring harness |
| A159 | Connection (L), in dash panel wiring harness |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
Wiring Diagram AUDI A4 2008 - Function selection switch 2 - control unit in dash panel insert
| E272 | Function selection switch 2 |
| J285 | Control unit in dash panel insert |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| A175 | Connection (58s), in dash panel wiring harness |
| * | Output for signal earth |
AUDI A4 2008 Control units overview
| 1 - | Heated windscreen control unit -J505- |
| q | Location → page 804/4 |
| 2 - | CD changer -R41- |
| q | Location → page 804/13 |
| 3 - | Fresh air blower control unit -J126- |
| q | Location ⇒ page → 804/7 |
| 4 - | Headlight range control, control unit -J431- |
| q | Location → page 804/7 |
| 5 - | Radio -R- |
| q | not for navigation system |
| q | Location → page 804/11 |
| 5 - | Navigation operating electronics control unit -J402- |
| q | for navigation system RNS-D only |
| q | Location → page 804/11 |
| 5 - | Control unit with display for radio and navigation system -J503- |
| q | for navigation system RNS-Low only |
| q | Location → page 804/13 |
| Audi A4 | Fitting Locations | No. 804 / 2 |
| 5 - | Navigation system with CD drive control unit -J401- |
| q | Location for navigation system NS-Low → page 804/12 |
| q | Location for navigation system RNS-E → page 804/12 |
| 6 - | Telephone and telematics control unit, telematics -J526- |
| q | Location → page 804/14 |
| 6 - | Language input control unit -J507- |
| q | Location → page 804/14 |
| 7 - | Steering column electronics control unit -J527- |
| q | Location → page 804/8 |
| 8 - | Front passenger side door control unit -J387- |
| q | Location → page 804/16 |
| 9 - | Display control unit in dash panel insert -J285- |
| q | Location → page 804/8 |
| 10 - | Airbag control unit -J234- |
| q | Location → page 804/9 |
| 11 - | Driver door control unit -J386- |
| q | Location → page 804/16 |
| Audi A4 | Fitting Locations | No. 804 / 3 |
| 12 - | Convenience system central control unit -J393- |
| q | Location → page 804/15 |
| 13 - | Onboard power supply control unit -J519- |
| q | Location → page 804/9 |
| 14 - | Motronic control unit -J220- |
| 14 - | Diesel direct injection system control unit -J248- |
| 14 - | Simos control unit -J361- |
| q | Location → page 804/4 |
| 15 - | Automatic gearbox control unit -J217- |
| q | not for models with multitronic® |
| q | Location → page 804/5 |
| 16 - | ABS control unit -J104- |
| q | Location → page 804/6 |
| 17 - | Automatic gearbox control unit -J217- |
| q | for models with multitronic® only |
| q | Location → page 804/5 |
| 18 - | Radiator fan control unit -J293- |
| q | Location → page 804/6 |
| Audi A4 | Fitting Locations | No. 804 / 4 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 5 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 6 |
|
|
|
| Audi A4 | Fitting Locations | No. 804 / 7 |
|
|
|
| Audi A4 | Fitting Locations | No. 804 / 8 |
|
|
|
| Audi A4 | Fitting Locations | No. 804 / 9 |
|
|
|
| Audi A4 | Fitting Locations | No. 804 / 10 |
|
|
|
| Audi A4 | Fitting Locations | No. 804 / 11 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 12 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 13 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 14 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 15 |
|
|
| Audi A4 | Fitting Locations | No. 804 / 16 |
|
|
|





































































