AUDI A3 2005 – Data bus wires (CAN bus, LIN bus) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2005 - Drive train CAN bus

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

q	Connector assignment for dual clutch gearbox (02E)

q	Location for dual clutch gearbox (0AM)

q	Connector assignment for dual clutch gearbox (0AM)

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

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-

Pin connector:

B -	52-pin connector -T52-

AUDI A3 2005 Wiper motor control unit J400 Location: in plenum chamber atwindscreen wiper motor -V-

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AUDI A3 2005 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-

Pin connector:

B -	20-pin connector -T20e-

AUDI A3 2005 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-

Pin connector:

A -	25-pin connector -T25-

AUDI A3 2005 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-

Pin connector:

B -	5-pin connector -T5-

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 J344 Location: on headlight housing

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AUDI A3 2005 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-

Pin connector:

A -	4-pin connector -T4ak-

AUDI A3 2005 Radiator fan control unit J293 Location: on motor forradiator fan -V7-

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AUDI A3 2005 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-

Pin connector:

B -	81-pin connector -T81-

C -	40-pin connector -T40-

-T121-made up of items B and C.

Connector assignment, 154 pin:

A -	Engine control unit

Pin connector:

B -	94-pin connector -T94-

C -	60-pin connector -T60-

AUDI A3 2005 ABS control unit J104 Location: On bulkhead, in engine compartment, right -arrow-

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Connector assignment:

A -	ABS control unit (MK60) -J104-

Pin connector:

B -	47-pin connector

Connector assignment:

A -	ABS control unit (MK70) -J104-

Pin connector:

B -	26-pin connector

AUDI A3 2005 Auxiliary heater control unit J364

Auxiliary heater control unit -J364-

Connector assignment.

1 -	Auxiliary heater control unit -J364-

Pin 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 2005 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

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 -

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-

Pin connector:

B -	26-pin connector -T26a-

AUDI A3 2005 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-

Pin connector:

A -	6-pin connector -T6p-

AUDI A3 2005 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-

Pin connector:

A -	6-pin connector -T6b-

B -	6-pin connector -T6t-

AUDI A3 2005 NOx sensor control unit J583 NOx sensor control unit -J583- Location: on underbody, near NOx catalytic converter

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AUDI A3 2005 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-

Pin 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-

Pin connector:

B -	32-pin connector -T32f-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20o-

AUDI A3 2005 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-

Pin connector:

A -	32-pin connector -T32-

AUDI A3 2005 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-

Pin connector:

B -	10-pin connector -T10b-

AUDI A3 2005 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-

Pin connector:

A -	6-pin connector -T6o-

AUDI A3 2005 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 2005 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-

Pin connector:

B -	32-pin connector -T32a-

C -	16-pin connector -T16b-

D -	20-pin connector -T20f-

AUDI A3 2005 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-

Pin 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 2005 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-

Pin connector:

A -	52-pin connector -T52a-

B -	52-pin connector -T52b-

C -	52-pin connector -T52c-

AUDI A3 2005 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 2005 Climatronic control unit J255 Climatronic control unit -J255- Location: in centre console

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Connector assignment.

-	Climatronic control unit -J255-

Pin connector:

A -	12-pin connector -T12f-

B -	20-pin connector -T20j-

C -	16-pin connector -T16e-

D -	16-pin connector -T16d-

AUDI A3 2005 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-

Pin connector:

B -	20-pin connector -T20d-

AUDI A3 2005 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 2005 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-

Pin connector:

B -	32-pin connector -T32b-

C -	16-pin connector -T16c-

D -	20-pin connector -T20g-

AUDI A3 2005 Airbag control unit J234 Airbag control unit -J234-

Location: Under centre console -arrow-

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Connector assignment.

A -	Airbag control unit -J234-

Pin connector:

B -	75-pin connector -T75-

Connector assignment.

-	Airbag control unit -J234-

Pin connector:

A -	84-pin connector -T84-

A -	84-pin connector -T84a-

Connector assignment.

-	Airbag control unit -J234-

Pin connector:

A -	100-pin connector -T100-

A -	100-pin connector -T100a-

AUDI A3 2005 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-

Pin connector:

A -	4-pin connector -T4l-

AUDI A3 2005 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 2005 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 2005 CD changer R41 CD changer -R41- Location: In glove box -arrow-

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AUDI A3 2005 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-

Pin connector:

A -	47-pin connector -T47-

AUDI A3 2005 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-

Pin connector:

A -	20-pin connector -T20q-

AUDI A3 2005 Voltage stabiliser J532 Voltage stabiliser -J532-

Location: Under driver seat -arrow-

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

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AUDI A3 2005 Overview of control units

Overview of control units    

1 -

q	Connector assigment -J345-

q	Connector assigment -J393-

q	Connector assigment -J446- ⇒ page

2 -	Control units on left in luggage compartment

q	Components: -J401-, -J415-, -R86-, -R146-

q	Location from -J401-

q	Location from -J415-

q	Location from -R86-

q	Location from -R146-

q	Connector assigment

Control units on right in luggage compartment    

Location: A -  Parking aid control unit -J446- 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-

Audi A3 Fitting Locations No.  806 / 4 Connector assignment. https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu A -  Convenience system central control unit -J393- Audi A3 Fitting Locations No.  806 / 5 Connector assignment. https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu A -  Parking aid control unit -J446- Audi A3 Fitting Locations No.  806 / 6 Location: 3 -  Aerial amplifier for mobile telephone - R86   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu Location: 2 -  Navigation system with CD drive control unit (NS-low) -J401-   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu Location: Satellite radio - R146   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu Location: Navigation system tuner for TV -J415-   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Získejte přístup ke všem schématům zapojení automobilu Location:

on rear axle differential, front left

  Connector assignment.

-	All-wheel drive control unit -J492-

Pin connector:

A -	2-pin connector -T2ax-

B -	8-pin connector, black -T8y-