Wiring Diagram AUDI A3 2005 - Drive train CAN bus
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Automotive Electricians Portal FZCO
| E313 | Selector lever |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J743 | Mechatronics for direct shift gearbox |
| T10k | 10-pin connector, black, on selector lever |
| T20e | 20-pin connector, black (connector A) |
| T94 | 94-pin connector, black (connector B) |
| T121 | 121-pin connector, black, on engine control unit |
| B383 | Connection 1 (drive train CAN bus, high), in main wiring harness |
| B390 | Connection 1 (drive train CAN bus, low), in main wiring harness |
| * | for models with engine codes AZV, BKC, BKD only |
| ** | for models with engine codes BDB, BMJ only |
| *** | for models with engine code AXX, BPY only |
| **** | for models with direct shift gearbox (02E) only |
Wiring Diagram AUDI A3 2005 - Drive train CAN bus
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J361 | Simos control unit |
| J500 | Power steering control unit |
| T5 | 5-pin connector, white (connector C) |
| T10n | 10-pin connector, black, near longitudinal member, front left |
| T52 | 52-pin connector, black (connector A) |
| T94 | 94-pin connector, black (connector B) |
| T121 | 121-pin connector, black, on engine control unit |
| B383 | Connection 1 (drive train CAN bus, high), in main wiring harness |
| B390 | Connection 1 (drive train CAN bus, low), in main wiring harness |
| * | for models with automatic gearbox (09G) only |
| ** | for models with engine codes BGU only |
| *** | for models with engine codes BLP, BLF, BLX, BHD, BMB, BLY, BLR only |
Wiring Diagram AUDI A3 2005 - Drive train CAN bus
| J104 | ABS control unit |
| J431 | Headlight range control, control unit |
| J492 | Four-wheel drive control unit |
| J533 | Data bus diagnostic interface |
| T6q | 6-pin connector, black, near fuel gauge sender 2 |
| T20d | 20-pin connector, yellow (connector A) |
| T26a | 26-pin connector, black (connector A) |
| B383 | Connection 1 (drive train CAN bus, high), in main wiring harness |
| B390 | Connection 1 (drive train CAN bus, low), in main wiring harness |
| * | for models with anti-lock brake system (ABS) MK60 and direct shift gearbox (02E) or manual gearbox only |
| ** | for models with anti-lock brake system (ABS) MK70 only |
| *** | for models with anti-lock brake system (ABS) MK60 and automatic gearbox (09G) only |
Wiring Diagram AUDI A3 2005 - Convenience CAN bus
| J234 | Airbag control unit |
| J255 | Climatronic control unit |
| J345 | Trailer detector control unit |
| J446 | Parking aid control unit |
| J527 | Steering column electronics control unit |
| J533 | Data bus diagnostic interface |
| J604 | Auxiliary air heater control unit |
| T4l | 4-pin connector, black (connector C) |
| T10a | 10-pin connector, black, behind the glove compartment |
| T12h | 12-pin connector, red (connector A) |
| T16e | 16-pin connector, brown (connector C) |
| T16f | 16-pin connector, brown, on parking aid control unit |
| T20b | 20-pin connector, black (connector A) |
| T84 | 84-pin connector, yellow (connector A) |
| T84a | 84-pin connector, yellow (connector A) |
| T75 | 75-pin connector, yellow (connector locking green) |
| B383 | Connection 1 (drive train CAN bus, high), in main wiring harness |
| B390 | Connection 1 (drive train CAN bus, low), in main wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| * | for models with curtain airbag (connector locking blue) only |
| ** | for models without curtain airbag (connector locking green) only |
| *** | for models with 5-door models only |
Wiring Diagram AUDI A3 2005 - Convenience CAN bus - LIN bus
| G273 | Interior monitoring sensor |
| G397 | Rain and light detector sensor |
| H12 | Alarm horn |
| J519 | Onboard supply control unit |
| J393 | Convenience system central control unit |
| J400 | Wiper motor control unit |
| J529 | Anti-theft and tilt system control unit |
| J533 | Data bus diagnostic interface |
| T6g | 6-pin connector, black (connector E) |
| T8h | 8-pin connector, black (connector F) |
| T12e | 12-pin connector, black (connector G) |
| T18 | 18-pin connector, brown (connector A) |
| T20d | 20-pin connector, yellow (connector A) |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| B528 | Connection 1 (LIN bus), in main wiring harness |
| B549 | Connection 2 (LIN bus), in main wiring harness |
Wiring Diagram AUDI A3 2005 - Convenience CAN bus
| J386 | Driver side door control unit |
| J387 | Front passenger side door control unit |
| J388 | Rear left door control unit |
| J389 | Rear right door control unit |
| J533 | Data bus diagnostic interface |
| T20 | 20-pin connector, black, door, A pillar, left |
| T20a | 20-pin connector, black, door, A pillar, right |
| T20f | 20-pin connector, black (connector A) |
| T20g | 20-pin connector, black (connector A) |
| T20l | 20-pin connector, black, door, B pillar, left |
| T20m | 20-pin connector, black, door, B pillar, right |
| T20n | 20-pin connector, black (connector A) |
| T20o | 20-pin connector, black (connector A) |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
Wiring Diagram AUDI A3 2005 - Infotainment CAN bus
| J285 | Control unit in dash panel insert |
| J401 | Navigation system with CD drive control unit |
| J402 | Navigation operating electronics control unit |
| J415 | Navigation system tuner for TV |
| J533 | Data bus diagnostic interface |
| T16g | 16-pin connector, black (connector D) |
| T20d | 20-pin connector, yellow (connector A) |
| T20h | 20-pin connector, black (connector C) |
| T20k | 20-pin connector, black (connector C) |
| T32 | 32-pin connector, blue (connector A) |
| T54a | 54-pin connector, black (connector A) |
| B415 | Connection 1 (infotainment CAN bus, high), in main wiring harness |
| B421 | Connection 1 (infotainment CAN bus, low), in main wiring harness |
| * | for models with TV tuner only |
| ** | for models with radio navigation system (models for Japan) only |
| *** | for models with radio navigation system RNS-E only |
| **** | for models with navigation system NS-LOW only |
Wiring Diagram AUDI A3 2005 - Infotainment CAN bus
| J533 | Data bus diagnostic interface |
| R | Radio |
| R36 | Telephone transmitter and receiver unit |
| R44 | Amplifier with bass loudspeaker, on left in luggage compartment |
| T20d | 20-pin connector, yellow (connector A) |
| T20i | 20-pin connector, black (connector A) |
| T54 | 54-pin connector, black (connector A) |
| B415 | Connection 1 (infotainment CAN bus, high), in main wiring harness |
| B421 | Connection 1 (infotainment CAN bus, low), in main wiring harness |
AUDI A3 2005 Overview of control units
Overview of control units | | q | Connector assignment for dual clutch gearbox (02E) |
| q | Location for dual clutch gearbox (0AM) |
| q | Connector assignment for dual clutch gearbox (0AM) |
| 5 - | 6 - | Garage door operation control unit -J530- |
| 8 - | Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623- |
| q | Connector assignment, 121 pin |
| q | Connector assignment, 154 pin |
| 9 - | 10 - | Auxiliary heater control unit -J364- |
| q | under the longitudinal member on front right |
| q | Connector assignment, 47 pin |
| q | Connector assignment, 26 pin |
| Automatic gearbox control unit -J217- | | | |
| under front left wing, near A pillar | | | |
| A - | Automatic gearbox control unit -J217- |
| B - | 52-pin connector -T52- |
AUDI A3 2005 Wiper motor control unit J400Location: |
| in plenum chamber atwindscreen wiper motor -V- | | | |
AUDI A3 2005 Mechatronic unit for dual clutch gearbox J743Mechatronic unit for dual clutch gearbox -J743- |
| | |
| A - | Mechatronic unit for dual clutch gearbox -J743- |
| B - | 20-pin connector -T20e- |
AUDI A3 2005 Mechatronic unit for dual clutch gearbox J743Mechatronic unit for dual clutch gearbox -J743- |
| | |
| - | Mechatronic unit for dual clutch gearbox -J743- |
| A - | 25-pin connector -T25- |
AUDI A3 2005 Power steering control unit J500Power steering control unit -J500- |
| | |
| A - | Power steering control unit -J500- |
| C - | 5-pin connector -T5a- |
| D - | 2-pin connector -T2a- |
AUDI A3 2005 Left gas discharge light control unit J343 / Right gas discharge light control unit J344Location: |
| | |
AUDI A3 2005 Garage door operation control unit J530Garage door operation control unit -J530- |
| | |
| - | Garage door operation control unit -J530- |
| A - | 4-pin connector -T4ak- |
AUDI A3 2005 Radiator fan control unit J293Location: |
| on motor forradiator fan -V7- | | | |
AUDI A3 2005 Simos control unit J361 / Motronic control unit J220 / Diesel direct injection system control unit J248 / Engine control unit J623Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623- |
| central in plenum chamber -arrow- | | | |
| Connector assignment, 121 pin: |
| A - | Engine control unit -J623- |
| B - | 81-pin connector -T81- |
| C - | 40-pin connector -T40- |
Note
| -T121-made up of items B and C. |
| Connector assignment, 154 pin: |
| B - | 94-pin connector -T94- |
| C - | 60-pin connector -T60- |
AUDI A3 2005 ABS control unit J104Location: |
| On bulkhead, in engine compartment, right -arrow- | | | |
| A - | ABS control unit (MK60) -J104- |
| A - | ABS control unit (MK70) -J104- |
AUDI A3 2005 Auxiliary heater control unit J364
| Auxiliary heater control unit -J364- |
| 1 - | Auxiliary heater control unit -J364- |
| 2 - | 2-pin connector -T2v- |
| 3 - | 2-pin connector -T2x- |
| 5 - | 4-pin connector -T4u- |
| 6 - | 8-pin connector -T8r- |
| 7 - | 3-pin connector -T3j- |
| 8 - | 8-pin connector -T8q- |
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