AUDI A3 2008 – Data bus wires (CAN bus, LIN bus) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2008 - Drive train CAN bus

E313	Selector lever
J220	Motronic control unit
J248	Diesel direct injection system control unit
J587	Selector lever sensors control unit
J623	Engine control unit
J743	Mechatronics for direct shift gearbox
T10k	10-pin connector, black (connector A)
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, BKD, BKC, BXE only
**	for models with engine codes BMM, BMN, BUY, BLS only
***	for models with engine codes AXX, BPY, BWA, BPT, BPU, BYT, CAXC, CAWB, BZB, CCTA, CBFA only
****	for models with engine codes BMJ, BUB only
*****	for models with direct shift gearbox (02E) only

Wiring Diagram AUDI A3 2008 - Drive train CAN bus

J217	Automatic gearbox control unit
J220	Motronic control unit
J500	Power steering control unit
J623	Engine control unit
J743	Mechatronic unit for direct shift gearbox
T5	5-pin connector, white (connector C)
T6	6-pin connector, black, near longitudinal member, front left
T10n	10-pin connector, black, near longitudinal member, front left
T25	25-pin connector, black (connector A)
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 engine code BSE, BSF only
**	for models with engine codes BLR, BLY, BVY, BVZ only
***	for models with engine code BLF only
****	for models with direct shift gearbox 0AM only
*****	for models with automatic gearbox (09G) only

Wiring Diagram AUDI A3 2008 - 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
J667	Power output module for left headlight
J668	Power output module for right headlight
T6q	6-pin connector, black, near fuel gauge sender 2
T20d	20-pin connector, yellow (connector A)
T26a	26-pin connector, black (connector A)
T26b	26-pin connector, blue (connector A)
B229	Connection (high bus), in interior wiring harness
B230	Connection (low bus), in interior wiring harness
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
****	for models with dynamic cornering light only

Wiring Diagram AUDI A3 2008 - Convenience CAN bus

J234	Airbag control unit
J255	Climatronic control unit
J301	Air conditioning system 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)
T20c	20-pin connector, black (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

Wiring Diagram AUDI A3 2008 - Convenience CAN bus - LIN bus

G273	Interior monitoring sensor
G397	Rain and light detector sensor
H12	Alarm horn
J393	Convenience system central control unit
J400	Wiper motor control unit
J502	Tyre pressure monitor control unit
J519	Onboard supply 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)
T20q	20-pin connector (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
*	for models with anti-theft alarm system only
**	for models with automatic headlight switching only
***	for models with US equipment only

Wiring Diagram AUDI A3 2008 - Convenience CAN bus

J386	Driver door control unit
J387	Front passenger 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
#	is dropped from May 2007
##	applicable from May 2007

Wiring Diagram AUDI A3 2008 - Infotainment CAN bus

J401	Navigation system with CD drive control unit
J402	Navigation operating electronics control unit
J503	Control unit with display for radio and navigation system
J415	Navigation system tuner for TV
J533	Data bus diagnostic interface
R	Radio
T20d	20-pin connector, yellow (connector A)
T20h	20-pin connector, black (connector C)
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 navigation system NS-LOW only
***	for models with radio navigation system RNS-E only
****	for models with radio navigation system RNS-low only
#	for models with radiogeneration II plus only

Wiring Diagram AUDI A3 2008 - Infotainment CAN bus

J285	Control unit in dash panel insert
J364	Auxiliary heater control unit
J402	Navigation operating electronics control unit
J503	Control unit with display for radio and navigation system
J533	Data bus diagnostic interface
T2bb	2-pin connector, black (connector D)
T8q	8-pin connector, black (connector A)
T20d	20-pin connector, yellow (connector A)
T20k	20-pin connector, black (connector C)
T32	32-pin connector, blue (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 radio navigation system (models for Japan) only
#	is dropped, from model year 2006
##	applicable from model year 2007

Wiring Diagram AUDI A3 2008 - Infotainment CAN bus

R	Radio
R36	Telephone transmitter and receiver unit
R44	Amplifier with bass loudspeaker, on left in luggage compartment
R146	Satellite radio
T2av	2-pin connector, black, on right A-pillar
T8t	8-pin connector, black, in luggage compartment, rear left (connector B)
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
*	for models with radiogeneration II only
****	for satellite radio preparation only

AUDI A3 2008 Overview of control units

Overview of control units

q	Connector assignment

2 -

q	Connector assignment for dual clutch gearbox (02E)

q	Location for dual clutch gearbox (0AM)

q	Connector assignment for dual clutch gearbox (0AM)

q	Location for dual clutch gearbox (0B5)

q	Connector assignment for dual clutch gearbox (0B5)

q	Connector assignment

5 -

6 -

Garage door operation control unit -J530-

q

Location

q	Connector assignment

8 -	Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623-

q

Location

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

q	Connector assignment, 47 pin

q	Connector assignment, 26 pin

Battery monitor control unit -J367-

Location: on battery -2- in left of engine compartment

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AUDI A3 2008 Automatic gearbox control unit J217 Automatic gearbox control unit -J217- Location: under front left wing, near A pillar

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Connector assignment.

A -	Automatic gearbox control unit -J217-

Connector:

B -	52-pin connector -T52-

AUDI A3 2008 Wiper motor control unit J400 Location: in plenum chamber atwindscreen wiper motor -V-

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AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743- Location: on gearbox

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Connector assignment.

A -	Mechatronic unit for dual clutch gearbox -J743-

Connector:

B -	20-pin connector -T20e-

AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743-

Location: on gearbox

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Connector assignment.

-	Mechatronic unit for dual clutch gearbox -J743-

Connector:

A -	25-pin connector -T25-

AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743- Fitting location in engine compartment, left

A -	Mechatronic unit for dual clutch gearbox -J743-

B -	16-pin connector -T16j-

AUDI A3 2008 Power steering control unit J500 Power steering control unit -J500-

Location: on steering box -arrow-

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Connector assignment.

A -	Power steering control unit -J500-

Connector:

B -	5-pin connector -T5-

C -	5-pin connector -T5a-

D -	2-pin connector -T2a-

AUDI A3 2008 Left gas discharge light control unit J343 / Right gas discharge light control unit J344 Location: on headlight housing

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AUDI A3 2008 Garage door operation control unit J530 Garage door operation control unit -J530- Location: under front bumper-1-

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Connector assignment.

-	Garage door operation control unit -J530-

Connector:

A -	4-pin connector -T4ak-

AUDI A3 2008 Radiator fan control unit J293 Location: am Motor für Radiator fan -V7-

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AUDI A3 2008 Simos control unit J361 / Motronic control unit J220 / Diesel direct injection system control unit J248 / Engine control unit J623 Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623- Location: central in plenum chamber -arrow-

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Connector assignment, 121 pin:

A -	Engine control unit -J623-

Connector:

B -	Steckverbindung, 81fach -T81-

C -	Steckverbindung, 40fach -T40-

-T121-made up of items B and C.

Connector assignment, 154 pin:

A -	Engine control unit

Connector:

B -	Steckverbindung, 94fach -T94-

C -	Steckverbindung, 60fach -T60-

AUDI A3 2008 ABS control unit J104 Location: On bulkhead, in engine compartment, right -arrow-

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Steckerbelegung :

A -	ABS control unit (MK60) -J104-

Connector:

B -	Steckverbindung, 47fach

Steckerbelegung :

A -	ABS control unit (MK70) -J104-

Connector:

B -	Steckverbindung, 26fach

AUDI A3 2008 Auxiliary heater control unit J364

Auxiliary heater control unit -J364-

Connector assignment.

1 -	Auxiliary heater control unit -J364-

Connector:

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-

AUDI A3 2008 Overview of control units

Overview of control units

q	Connector assignment

q	Connector assignment

q	not for models with US equipment

2 -

q	Connector assignment

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	for models with 5-door models only

q	Connector assignment

q	Connector assignment

q	Connector assignment

q	for models with 5-door models only

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	Connector assignment

q	Location, from model year 2010

q	Connector assignment, from model year 2004

q	Connector assignment, from model year 2010

Heater control unit -J162-

q

Location

13 -

q	Connector assignment

13 -

14 -

Auxiliary air heater control unit -J604-

q

Location

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

16 -

q	Connector assignment

16 -

16 -

q	Connector assignment

q	Connector assignment

q	Connector assignment, 75 pin

q	Connector assignment, 84 pin

q	Connector assignment, 100 pin

Control unit with display for radio and navigation system -J503-

q

Location

20 -

Anti-theft and tilt system control unit -J529-

Location: Behind the glove compartment-2-

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AUDI A3 2008 Headlight range control, control unit J431 Headlight range control, control unit -J431- Location: Below the dash panel on right, on left centre console -arrow-

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Connector assignment.

A -	Headlight range control, control unit -J431-

Connector:

B -	26-pin connector -T26a-

AUDI A3 2008 Front passenger seat heating control unit J727 Front passenger seat heating control unit -J727-

Location: Under front passenger seat

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Connector assignment.

-	Front passenger seat heating control unit -J727-

Connector:

A -	6-pin connector -T6p-

AUDI A3 2008 Sliding sunroof adjustment control unit J245 Sliding sunroof adjustment control unit -J245-

Location: Under cover for interior light operating unit -arrow-

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Connector assignment.

-	Sliding sunroof adjustment control unit -J245-

Connector:

A -	6-pin connector -T6b-

B -	6-pin connector -T6t-

AUDI A3 2008 NOx sensor control unit J583 NOx sensor control unit -J583- Location: on underbody, near NOx catalytic converter

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AUDI A3 2008 Rear left door control unit J388 / Rear right door control unit J389 Rear left door control unit -J388-/Rear right door control unit -J389- Location: in rear door

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Connector assignment.

A -	Rear left door control unit -J388-

Connector:

B -	32-pin connector -T32e-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20n-

Connector assignment.

A -	Rear right door control unit -J389-

Connector:

B -	32-pin connector -T32f-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20o-

AUDI A3 2008 Control unit in dash panel insert J285 Control unit in dash panel insert -J285-

Location: in dash panel

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Connector assignment.

-	Control unit in dash panel insert -J285-

Connector:

A -	32-pin connector -T32-

AUDI A3 2008 Fuel pump control unit J538 Fuel pump control unit -J538-

Location: under rear seat bench, on fuel pump -arrow-

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Connector assignment.

A -	Fuel pump control unit -J538-

Connector:

B -	10-pin connector -T10b-

AUDI A3 2008 Driver seat heating control unit J726 Driver seat heating control unit -J726-

Location: under driver seat

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Connector assignment.

-	Driver seat heating control unit -J726-

Connector:

A -	6-pin connector -T6o-

AUDI A3 2008 Steering column electronics control unit J527 Steering column electronics control unit -J527-

Location: On steering column -arrow-

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Connector assignment.

A -	Steering column electronics control unit -J527-

B -	4-pin connector(Airbag mounting)

C -	10-pin connector(Cruise control system and turn signal support)

D -	20-pin connector -T20b-

E -	4-pin connector -T4n-

F -	12-pin connector(Ignition/starter switch and ignition key withdrawal lock support)

G -	8-pin connector(Wiper support, interval potentiometer and multifunction system)

H -	10-pin connector(Steering angle sensor support)

I -	10-pin connector(Coil connector support)

AUDI A3 2008 Driver door control unit J386 Driver door control unit -J386-

Location: In driver door -arrow-

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Connector assignment.

A -	Driver door control unit -J386-

Connector:

B -	32-pin connector -T32a-

C -	16-pin connector -T16b-

D -	20-pin connector -T20f-

AUDI A3 2008 Onboard supply control unit J519 Onboard supply control unit -J519-

Location: On left under dash panel, under relay carrier -arrow-

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Connector assignment.

-	Onboard supply control unit -J519-

Connector:

A -	11-pin connector -T11b-

B -	12-pin connector -T12c-

C -	12-pin connector -T12d-

D -	11-pin connector -T11c-

E -	16-pin connector -T16a-

F -	8-pin connector -T8h-

G -	12-pin connector -T12e-

H -	12-pin connector

I -	2-pin connector -T2b-

J -	6-pin connector -T6h-

K -	10-pin connector -T10d-

L -	2-pin connector -T2t-

AUDI A3 2008 Onboard supply control unit J519 Onboard supply control unit -J519-

Location: Left under dash panel -arrow-

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Connector assignment.

-	Onboard supply control unit -J519-

Connector:

A -	52-pin connector -T52a-

B -	52-pin connector -T52b-

C -	52-pin connector -T52c-

AUDI A3 2008 Heater control unit J65 / Heater control unit J162 Heater control unit -J65-/Heater control unit -J162- Location: in centre console

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AUDI A3 2008 Climatronic control unit J255 Climatronic control unit -J255- Location: in centre console

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Connector assignment.

-	Climatronic control unit -J255-

Connector:

A -	12-pin connector -T12f-

B -	20-pin connector -T20j-

C -	16-pin connector -T16e-

D -	16-pin connector -T16d-

AUDI A3 2008 data bus diagnostic interface J533 data bus diagnostic interface -J533-

Location: in left footwell -arrow-   Note Location ofdata bus diagnostic interface -J533-is the same for right and left-hand drive models.

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Connector assignment.

A -	data bus diagnostic interface -J533-

Connector:

B -	20-pin connector -T20d-

AUDI A3 2008 Fresh air blower control unit J126 Fresh air blower control unit -J126- Location: Under glove compartment, onfresh air blower -V2-

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AUDI A3 2008 Front passenger door control unit J387 Front passenger door control unit -J387- Location: in front passenger door -arrow-

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Connector assignment.

A -	Front passenger door control unit -J387-

Connector:

B -	32-pin connector -T32b-

C -	16-pin connector -T16c-

D -	20-pin connector -T20g-

AUDI A3 2008 Airbag control unit J234 Airbag control unit -J234-

Location: Under centre console -arrow-

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Connector assignment.

A -	Airbag control unit -J234-

Connector:

B -	75-pin connector -T75-

Connector assignment.

-	Airbag control unit -J234-

Connector:

A -	84-pin connector -T84-

A -	84-pin connector -T84a-

Connector assignment.

-	Airbag control unit -J234-

Connector:

A -	100-pin connector -T100-

A -	100-pin connector -T100a-

AUDI A3 2008 Auxiliary air heater control unit J604 Auxiliary air heater control unit -J604-

Location: on air conditioning system unit, extreme left, next to heat exchanger

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Connector assignment.

-	Auxiliary air heater control unit -J604-

Connector:

A -	4-pin connector -T4l-

AUDI A3 2008 Radio R / Control unit with display for radio and navigation system J503 (RNS-low) Radio -R-/Control unit with display for radio and navigation system -J503- (RNS-low) Location: In centre console -arrow-

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AUDI A3 2008 Navigation operating electronics control unit J402 (RNS-E) Navigation operating electronics control unit -J402- (RNS-E) Location: in centre console

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AUDI A3 2008 CD changer R41 CD changer -R41- Location: In glove box -arrow-

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AUDI A3 2008 Electronically controlled damping control unit J250 Electronically controlled damping control unit -J250- Location: Under front passenger seat -arrow-

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Connector assignment.

-	Electronically controlled damping control unit -J250-

Connector:

A -	47-pin connector -T47-

AUDI A3 2008 Tyre pressure monitor control unit J502 Tyre pressure monitor control unit -J502-

Location: Behind the glove compartment -arrow-

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Connector assignment.

-	Tyre pressure monitor control unit -J502-

Connector:

A -	20-pin connector -T20q-

AUDI A3 2008 Connection for external audio source R199 Connection for external audio source -R199- Fitting location In glove compartment

A -	Connection for external audio source -R199-

B -	12-pin connector -T12y-

AUDI A3 2008 Voltage stabiliser J532 Voltage stabiliser -J532-

Location: Under driver seat -arrow-

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Connector assignment.  -  Voltage stabiliser -J532- Connector: A -  12-pin connector -T12x-

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AUDI A3 2008 Overview of control units

Overview of control units

1 -	Control​ units​ on​ right​ in​ luggage​ compartment

q	Components: -J345-, -J393-, -J446-, -J791-

q	Fitting location

q	Connector assignment-J345-

q	Connector assignment-J393-

q	Connector assignment-J446-/ -J791-

2 -

q	Location of -J415-

q	Location of -J86-

q	Location of -J146-

q	Location of -J44-

q	Connector assignment

Location: A -  Parking​ aid​ control​ unit -J446-/ Park assist steering control unit -J791- B -  Trailer​ detector​ control​ unit -J345- C -  Convenience system central control unit -J393-

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Connector assignment.

A -	Trailer​ detector​ control​ unit -J345-

Connector assignment.

A -	Convenience system central control unit -J393-

Connector assignment.

A -	Parking aid control unit -J446-

Control units on left in luggage compartment

   

Location: 3 -  Aerial​ amplifier​ for​ mobile​ telephone -R86-

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Location: 2 -  Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-

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Location: Satellite radio -R146-

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Location: Navigation system tuner for TV -J415-

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Location: Amplifier with bass loudspeaker, on left in luggage compartment -R44-

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All-wheel drive control unit -J492- Location: on rear axle differential, front left

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Connector assignment.

-	All-wheel drive control unit -J492-

Connector:

A -	2-pin connector -T2ax-

B -	8-pin connector -T8y-