Wiring Diagram AUDI A4 2008 - ABS control unit - Power steering control unit - Active steering control unit
Wiring Diagram AUDI A4 2008 - Digital sound package control unit - Telephone transmitter and receiver unit
Wiring Diagram AUDI A4 2008 - Driver door control unit - Onboard supply control unit
Wiring Diagram AUDI A4 2008 -
Wiring Diagram AUDI A4 2008 - Control unit in dash panel insert - Auxiliary heater control unit - Steering column electronics control unit - Data bus diagnostic interface - Control unit for electromechanical parking brake
| J285 | Control unit in dash panel insert |
| J364 | Auxiliary heater control unit |
| J527 | Steering column electronics control unit |
| J533 | Data bus diagnostic interface |
| J540 | Control unit for electromechanical parking brake |
| T6a | 6-pin connector |
| T16f | 16-pin connector |
| T17f | 17-pin connector, brown |
| T20d | 20-pin connector |
| T30a | 30-pin connector |
| T32f | 32-pin connector |
| T46s | 46-pin connector |
| B672 | Connection 1 (running gear/dash panel insert CAN bus, high), in main wiring harness |
| B673 | Connection 2 (running gear/dash panel insert CAN bus, high), in main wiring harness |
| B676 | Connection 1 (running gear/dash panel insert CAN bus, low), in main wiring harness |
| B677 | Connection 2 (running gear/dash panel insert CAN bus, low), in main wiring harness |
| * | Front passenger side push-in bridge, brown |
| *2 | According to equipment |
Wiring Diagram AUDI A4 2008 - Data bus diagnostic interface - Radio - Connection for external audio sources
Wiring Diagram AUDI A4 2008 - Climatronic control unit - Front passenger door control unit - Steering column electronics control unit - Data bus diagnostic interface
Wiring Diagram AUDI A4 2008 -
| * | Front passenger side push-in bridge, brown |
AUDI A4 2008 Overview of control units
Overview of control units | Note:
| ♦ Overview also valid for Avant models (5-door)! |
| | | q | Location and connector, from model year 2013: |
| q | Location and connectors for models with 800 W or 1000 W radiator fan: |
| 3 - | Radiator fan control unit 2 -J671- / radiator fan 2 -V177- |
| q | Location and connectors for models with 800 W or 1000 W radiator fan: |
| q | Location and connectors for models with right-hand drive (with -T60- and -T94-): |
| q | Location and connectors for models with left-hand drive -T91- and -T105-): |
| q | Location and connectors for models with right-hand drive (with -T91- and -T105-): |
| Automatic gearbox control unit -J217- / Mechatronics for dual clutch gearbox -J743- |
| q | Location and connectors: |
| q | Location and connector, from model year 2013: |
AUDI A4 2008 Engine control unit J623Engine control unit -J623- | | Location engine control unit -J623- for models with left-hand drive: | | In electronics box in plenum chamber, driver side | Note: | t | Figure shows left-hand drive model. | | t | Figure for right-hand drive models . | | | |
| A - | Engine control unit -J623- |
| C - | 60-pin connector, on wiring harness -T60- |
| A - | Engine control unit -J623- |
| B - | 94-pin connector -T94- |
| C - | 60-pin connector -T60- |
| Location engine control unit -J623- for models with left-hand drive (with -T91- and -T105-): | | In electronics box in plenum chamber, driver side | Note: | t | Figure shows left-hand drive model. | | t | Figure for right-hand drive models . | | | |
| A - | Engine control unit -J623- |
| C - | 105-pin connector -T105- |
| Location engine control unit -J623- for models with right-hand drive (with -T91- and -T105-): | | In electronics box in plenum chamber, driver side | Note: | t | Figure shows right-hand drive model. | | t | Figure for left-hand drive models . | | | |
| A - | Engine control unit -J623- |
| B - | 91-pin connector -T91- |
| C - | 105-pin connector -T105- |
AUDI A4 2008 Left gas discharge light control unit J343 , up to model year 2012Left gas discharge light control unit -J343-, up to model year 2012 | | | |
| C - | Power output module for left headlight -J667- |
AUDI A4 2008 Right gas discharge light control unit J344 , up to model year 2012 | Right gas discharge light control unit -J344-, up to model year 2012 |
| | | C - | Power output module for right headlight -J668- |
AUDI A4 2008 Left gas discharge light control unit J343 , from model year 2013 | Left gas discharge light control unit -J343-, from model year 2013 |
| | | A - | Power output module for left headlight -J667- |
| B - | Control unit for left daytime running light and side light -J860- |
| C - | 14-pin connector -T14a- |
| D - | Left gas discharge light control unit -J343- |
| E - | Output module for left side marker light -J986- |
AUDI A4 2008 Right gas discharge light control unit J344 , from model year 2013Right gas discharge light control unit -J344-, from model year 2013 | | | |
| A - | Power output module for right headlight -J668- |
| B - | Control unit for left daytime running light and side light -J861- |
| C - | 14-pin connector -T14b- |
| D - | Right gas discharge light control unit -J344- |
| E - | Output module for right side marker light -J987- |
AUDI A4 2008 Auxiliary heater control unit J364Auxiliary heater control unit -J364- | | behind right wheel housing. | | | |
| A - | Auxiliary heater control unit -J364- |
| A2 - | 2-pin connector -T2ds- |
AUDI A4 2008 Automatic​ gearbox​ control​ unit J217 / Mechatronics​ for​ dual​ clutch​ gearbox​ J743Automatic gearbox control unit -J217- / Mechatronics for dual clutch gearbox -J743- | | | |
| A - | Automatic gearbox control unit -J217- / Mechatronics for dual clutch gearbox -J743- |
| A2 - | 8-pin connector -T8al- |
| A4 - | 14-pin connector -T14i- |
AUDI A4 2008 Wiper motor control unit J400Wiper motor control unit -J400- | | | |
| A - | Wiper motor control unit -J400- |
AUDI A4 2008 ABS control unit J104 | ABS control unit -J104- |
| in left of engine compartment. |
| | | A - | ABS control unit -J104- |
AUDI A4 2008 400 W or 600 W radiator fan | 400 W or 600 W radiator fan |
Note:
| Radiator fan 2 -V177- present depending on engine variant. |
| | | A - | Radiator fan control unit -J293- |
| B1 - | 2-pin connector, black -T2kl- |
| C - | Radiator fan 2 -V177- |
AUDI A4 2008 800 W or 1000 W radiator fan | 800 W or 1000 W radiator fan |
| | | A - | Radiator fan control unit -J293- |
| B1 - | 4-pin connector -T4bl- |
| B2 - | Radiator fan 2 -V177- |
AUDI A4 2008 Garage door operation control unit J530Garage door operation control unit -J530- | | at inner centre of radiator. | | | |
| A - | Garage door operation control unit -J530- |
AUDI A4 2008 Adaptive​ cruise​ control​ unit J428 | Adaptive cruise control unit -J428- |
| In front bumper grill cover on right. |
| | | A - | Adaptive cruise control unit -J428- |
AUDI A4 2008 Overview of control units in interior of vehicle | Overview of control units in interior of vehicle |
Note:
| ♦ Overview also valid for Avant models (5-door)! |
| | | q | Location and connectors for models with right-hand drive: |
| 6 - | Automatic anti-dazzle interior mirror -Y7- with Rain and light detector sensor -G397- |
| 9 - | Rear right door control unit -J389- |
| q | Location: in rear right door |
| 12 - | Fuel pump control unit -J538- |
| q | Location: under rear seat bench |
| 14 - | Active steering control unit -J792- |
| q | Location and connectors: |
| q | Location and connectors for models with right-hand drive: |
| q | Location and connectors for models with right-hand drive: |
| 18 - | Electronic steering column lock control unit -J764- |
| q | Location: on steering column |
| 19 - | Climatronic control unit -J255- |
| q | Location and connectors: |
| 20 - | Control unit for information electronics 1 -J794- |
| q | Location and connectors: |
AUDI A4 2008 Overview of control units in rear part of vehicle - saloon models (4-door) only
Overview of control units in rear part of vehicle - saloon models (4-door) only |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
| q | Overview of Avant models (5-door): |
AUDI A4 2008 Overview of control units in rear part of vehicle - Avant models (5-door) only
Overview of control units in rear part of vehicle - Avant models (5-door) only |
| 4 - | Digital sound package control unit -J525- |
| q | Location: in left of luggage compartment, behind side trim. |
| 4 - | Satellite radio -R146- |
| q | Location: in left of luggage compartment, behind side trim. |
| 4 - | Navigation system with CD drive control unit -J401- |
| q | Location: in left of luggage compartment, behind side trim. |
| 6 - | Voltage stabiliser -J532- |
AUDI A4 2008 Control unit for headlight range control J431 / control unit for bend lighting and headlight range control J745Control unit for headlight range control -J431- / control unit for bend lighting and headlight range control -J745- | | in front passenger footwell, behind the glove compartment | | | | | A - | Control unit for headlight range control -J431- / control unit for bend lighting and headlight range control -J745- | | Connector on control unit for headlight range control -J431-: | | A1 - | 26-pin connector -T26b- |
AUDI A4 2008 Fresh air blower control unit J126Fresh air blower control unit -J126- | | in front passenger footwell, behind the glove compartment | | | | | A - | Fresh air blower control unit -J126- | AUDI A4 2008 Driver door control unit J386 | Driver door control unit -J386- | | Location door control unit, driver side -J386- for models with left-hand drive: | Note: | t | Figure shows left-hand drive model. | | t | Figure for right-hand drive models . | | | |
| A - | Driver door control unit -J386- |
| A2 - | 16-pin connector -T16m- |
| A4 - | 6-pin connector -T6am- |
| A - | Driver door control unit -J386- |
| A1 - | 32-pin connector -T32j- |
| A2 - | 16-pin connector -T16m- |
| A3 - | 20-pin connector -T20f- |
| A4 - | 6-pin connector -T6am- |
AUDI A4 2008 Front passenger door control unit J387Front passenger door control unit -J387- | | Location door control unit, front passenger side -J387- for models with left-hand drive: | Note: | t | Figure shows left-hand drive model. | | t | Figure for right-hand drive models . | | | |
| A - | Front passenger door control unit -J387- |
| A2 - | 16-pin connector -T16n- |
| A4 - | 6-pin connector -T6ao- |
| A - | Front passenger door control unit -J387- |
| A1 - | 32-pin connector -T32l- |
| A2 - | 16-pin connector -T16n- |
| A3 - | 20-pin connector -T20g- |
| A4 - | 6-pin connector -T6ao- |
AUDI A4 2008 Automatic anti-dazzle interior mirror Y7 with Rain and light detector sensor G397Automatic anti-dazzle interior mirror -Y7- with Rain and light detector sensor -G397- | | at front of roof side member. | | | |
| Rain and light detector sensor -G397- |
| 4 - | Main beam assist control unit -J844- |
AUDI A4 2008 Sliding​ sunroof​ adjustment​ control​ unit J245 with sliding sunroof motor V1Sliding sunroof adjustment control unit -J245- with sliding sunroof motor -V1- | | in roof module, on upper front roof frame | | | |
AUDI A4 2008 Onboard supply control unit J519 | Onboard supply control unit -J519- |
| Location onboard supply control unit -J519- for models with left-hand drive: |
| Driver side dash panel, bottom. |
Note:
| t | Figure shows left-hand drive model. |
| t | Figure for right-hand drive models . |
| | | A - | Onboard supply control unit -J519- |
| A2 - | 17-pin connector, brown (connector E) -T17m- |
| A4 - | 6-pin connector, green (connector G) -T6f- |
| A6 - | 16-pin connector, brown (connector C) -T16b- |
| Location onboard supply control unit -J519- for models with right-hand drive: |
| Driver side dash panel, bottom. |
Note:
| t | Figure shows right-hand drive model. |
| t | Figure for left-hand drive models . |
| | | A - | Onboard supply control unit -J519- |
| A1 - | 17-pin connector, black (connector D) -T17l- |
| A2 - | 17-pin connector, brown (connector E) -T17m- |
| A3 - | 17-pin connector, red (connector F) -T17n- |
| A4 - | 6-pin connector, green (connector G) -T6f- |
| A5 - | 32-pin connector, grey (connector A) -T32a- |
| A6 - | 16-pin connector, brown (connector C) -T16b- |
| A7 - | 32-pin connector, black (connector B) -T32b- |
AUDI A4 2008 Active steering control unit J792Active steering control unit -J792- | | Under the carpet in the driver's footwell | | | |
| 4 - | Active steering control unit -J792- |
| 2 - | 8-pin connector, black -T8g- |
AUDI A4 2008 Radio R (with integrated CD changer R41 / DVD changer R161 ) | Radio -R- (with integrated CD changer -R41- / DVD changer -R161-) |
| in middle part dash panel. |
| | | A1 - | Connector block, consisting of: |
| t | 8-pin connector, brown -T8k- |
| t | 8-pin connector, black -T16l- |
| t | 12-pin connector, green -T12a- |
| t | 12-pin connector, blue -T12s- |
| 1-pin connector, black -T1i- (connection DAB) / 1-pin connector, green -T1k- (connection SDARS) |
| A4 - | 2-pin connector, white -T2df- (AM / FM1 / FM2 connection) |
AUDI A4 2008 CD changer R41 / DVD changer R161CD changer -R41- / DVD changer -R161- | | | |
| A - | CD changer -R41- / DVD changer -R161- |
| A1 - | 8-pin connector -T8aa- |
| A2 - | 2-pin connector -T2dm- |
AUDI A4 2008 Chip card reader control unit J676Chip card reader control unit -J676- | Note: | t | Figure shows right-hand drive model. | | t | for models with Japan navigation system only. | | | |
| A - | Chip card reader control unit -J676- |
AUDI A4 2008 Display unit for front information display and operating unit control unit J685 | Display unit for front information display and operating unit control unit -J685- |
Note:
| Connector -A1- is given as an example for differing equipment versions |
| | | A - | Display unit for front information display and operating unit control unit -J685- |
| A1 - | Connector for models with MMI High up to August 2009: |
| t | 22-pin connector, black -T22b- |
| A1 - | Connectors for models with MMI Basic, from September 2009: |
| t | 8-pin connector, black -T8ai- |
| t | 4-pin connector, white -T4ao- |
| A1 - | Connectors for models with MMI High from September 2009: |
| t | 8-pin connector, black -T8ai- |
| t | 4-pin connector, black -T4an- |
| A1 - | 10-pin connector, red -T10u- |
| A1 - | AUDI A4 2008 Control unit for information electronics 1 J794 | Control unit for information electronics 1 -J794- |
| in middle part dash panel. |
| | | A - | Control unit for information electronics 1 -J794- |
| A2 - | 1-pin connector, blue -T1n- |
| A5 - | for models with -J794- basic: |
| t | 4-pin connector, violet -T4al- |
| A6 - | 1-pin connector, green -T1o- |
| A7 - | Connector block, consisting of: |
| t | 8-pin connector, brown -T8ah- |
| t | 8-pin connector, black -T8ao- |
| t | 12-pin connector, blue -T12x- |
| t | 12-pin connector, green -T12y- |
AUDI A4 2008 Multimedia​ system​ operating​ unit​ E380 | Multimedia system operating unit -E380- |
| | | A - | Multimedia system operating unit -E380- |
AUDI A4 2008 Climatronic control unit J255 | Climatronic control unit -J255- |
| in middle part dash panel. |
| | | A - | Climatronic control unit -J255- |
| A2 - | 20-pin connector -T20e- |
AUDI A4 2008 Airbag​ control​ unit​ J234Airbag control unit -J234- | | | |
| A - | Airbag control unit -J234- |
AUDI A4 2008 Telephone transmitter and receiver unit R36 | Telephone transmitter and receiver unit -R36- |
| | | A - | Telephone transmitter and receiver unit -R36- |
| A1 - | Connector -B- (Aerial for Bluetooth) |
AUDI A4 2008 16-pin connector T16 diagnostic connection | 16-pin connector -T16- diagnostic connection |
| Driver side dash panel, bottom. |
| | | A - | 16-pin connector -T16- diagnostic connection |
AUDI A4 2008 Data bus diagnostic interface J533Data bus diagnostic interface -J533- | | | |
| A - | Data bus diagnostic interface -J533- |
| A2 - | 20-pin connector -T20d- |
AUDI A4 2008 Control unit in dash panel insert J285Control unit in dash panel insert -J285- | | | |
| A - | Control unit in dash panel insert -J285- |
AUDI A4 2008 Control units on right in luggage compartment | Control units on right in luggage compartment |
| | | 1 - | Convenience system central control unit -J393- | | Connectors on convenience system central control unit -J393- → Chapter | | 2 - | Aerial amplifier for mobile telephone -R86- | | 3 - | Electronically controlled damping control unit -J 250- | | Connector on electronically controlled damping control unit -J250- | | 4 - | Reversing camera system control unit -J772- | | 5 - | Trailer detector control unit -J345- | | Connectors on trailer detector control unit -J345- | | 6 - | Park assist steering control unit -J791- | | Connectors on park assist steering control unit -J791- | | 7 - | Control unit for electromechanical parking brake -J540- | | | |
| Connectors on convenience system central control unit -J393- |
| 2 - | 32-pin connector, black (connector B) -T32c- |
| 4 - | 32-pin connector, blue (connector F) -T32e- |
| 5 - | 6-pin connector (connector G) -not assigned- |
| 7 - | 1-pin connector, grey (connector D) -T1h- |
| Connector on electronically controlled damping control unit -J250- |
| A - | Electronically controlled damping control unit -J 250- |
| Connectors on trailer detector control unit -J345- |
| A - | Trailer detector control unit -J345- |
| C - | 12-pin connector, red -T12d- |
| Connectors on Parallel Parking Assistance Control Module -J791- |
| B - | 12-pin connector, brown -T12e- |
AUDI A4 2008 All-wheel drive control unit J492 | All-wheel drive control unit -J492- |
| | | 1 - | All-wheel drive control unit -J492- |
| Location for Avant (5-door) models: |
Note:
| t | Figure shows Avant (5-door) model. |
| t | Figure for saloon (4-door) model . |
| | | 1 - | All-wheel drive control unit -J492- |
| 2 - | 47-pin connector -T47b- |
AUDI A4 2008 Voltage stabiliser J532Voltage stabiliser -J532- | | In spare wheel recess, on left next to battery. | | | |
| 1 - | Voltage stabiliser -J532- |
AUDI A4 2008 Battery​ monitor​ control​ unit​ J367 | Battery monitor control unit -J367- |
| at negative terminal of battery -A-. |
| | | 3 - | 2-pin connector -T2x- |