AUDI A3 2012 — Data bus network . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2012 - Connection 1 (powertrain CAN bus - high) - in main wiring harness - Connection 1 (powertrain CAN bus - low) - in main wiring harness

J500	Power steering control unit
J623	Engine control unit
J743	Mechatronic unit for dual clutch gearbox
T3w	3-pin connector
T6	6-pin connector
T8ad	8-pin connector
T20e	20-pin connector
T25	25-pin connector
Y7	Automatic anti-dazzle interior mirror
B383	Connection 1 (powertrain CAN bus, high), in main wiring harness
B390	Connection 1 (powertrain CAN bus, low), in main wiring harness
*	Only models with main beam assist
*2	see applicable current flow diagram for engine
*3	Not for RS 3 models
*4	Only models with dual clutch gearbox 0AM
*5	Only models with dual clutch gearbox 02E

Wiring Diagram AUDI A3 2012 - Connection (high bus) - in interior wiring harness - Connection (low bus) - in interior wiring harness - Connection 1 (powertrain CAN bus - high) - in main wiring harness - Connection 1 (powertrain CAN bus - low) - in main wiring harness

J431	Headlight range control unit
J492	All-wheel drive control unit
J533	Data bus diagnostic interface
J667	Output module for left headlight
J668	Output module for right headlight
T6q	6-pin connector
T8y	8-pin connector
T14c	14-pin connector
T14d	14-pin connector
T20d	20-pin connector
T26a	26-pin connector
T26b	26-pin connector
B229	Connection (high bus), in interior wiring harness
B230	Connection (low bus), in interior wiring harness
B383	Connection 1 (powertrain CAN bus, high), in main wiring harness
B390	Connection 1 (powertrain CAN bus, low), in main wiring harness
*	Only models with dynamic cornering light

Wiring Diagram AUDI A3 2012 - Connection 1 (powertrain CAN bus - high) - in main wiring harness - Connection 2 (powertrain CAN bus - high) - in main wiring harness - Connection 1 (powertrain CAN bus - low) - in main wiring harness - Connection 2 (powertrain CAN bus - low) - in main wiring harness - Connection 3 (LIN bus) in main wiring harness

C	Alternator
J104	ABS control unit
J367	Battery monitor control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
T20b	20-pin connector
T20d	20-pin connector
B383	Connection 1 (powertrain CAN bus, high), in main wiring harness
B384	Connection 2 (powertrain CAN bus, high), in main wiring harness
B390	Connection 1 (powertrain CAN bus, low), in main wiring harness
B391	Connection 2 (powertrain CAN bus, low), in main wiring harness
B698	Connection 3 (LIN bus) in main wiring harness
*	Only models with ABS and TCS
*2	Only models with anti-lock brake system (ABS) and electronic stabilisation program (ESP)
*3	Only right-hand drive models
*4	Only models with energy recovery
*5	Only models with start/stop system
*6	Only models with battery in engine compartment
*7	Only models with battery in luggage compartment
*8	see applicable current flow diagram

Wiring Diagram AUDI A3 2012 - Connection 2 (powertrain CAN bus - high) - in main wiring harness - Connection 2 (powertrain CAN bus - low) - in main wiring harness

J250	Electronically controlled damping control unit
J446	Parking aid control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J587	Selector lever sensors control unit
J791	Park assist steering control unit
T10k	10-pin connector
T16f	16-pin connector
T47	47-pin connector
B384	Connection 2 (powertrain CAN bus, high), in main wiring harness
B391	Connection 2 (powertrain CAN bus, low), in main wiring harness

Wiring Diagram AUDI A3 2012 - Connection 2 (powertrain CAN bus - high) - in main wiring harness - Connection 2 (powertrain CAN bus - low) - in main wiring harness

J104	ABS control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J623	Engine control unit
T94	94-pin connector
B384	Connection 2 (powertrain CAN bus, high), in main wiring harness
B391	Connection 2 (powertrain CAN bus, low), in main wiring harness
*	Only models with ABS and TCS
*2	Only models with anti-lock brake system (ABS) and electronic stabilisation program (ESP)
*3	Only for RS 3 models
*4	Only left-hand drive models

Wiring Diagram AUDI A3 2012 - Connection 2 (powertrain CAN bus - high) - in main wiring harness - Connection 2 (powertrain CAN bus - low) - in main wiring harness

J234	Airbag control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J743	Mechatronic unit for dual clutch gearbox
T8af	8-pin connector
T16j	16-pin connector
T100	100-pin connector
T100a	100-pin connector
B384	Connection 2 (powertrain CAN bus, high), in main wiring harness
B391	Connection 2 (powertrain CAN bus, low), in main wiring harness
*	Only for RS 3 models
*2	Only models with dual clutch gearbox
*3	Only models with no US equipment
*4	Only models with US equipment
*5	From May 2011

Wiring Diagram AUDI A3 2012 - Connection 1 (convenience CAN bus - high) - in main wiring harness - Connection 1 (convenience CAN bus - low) - in main wiring harness

J255	Climatronic control unit
J301	Air conditioning system control unit
J345	Trailer detector control unit
J502	Tyre pressure monitor control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J843	Interface control unit for vehicle location system
T12h	12-pin connector
T12u	12-pin connector
T16e	16-pin connector
T20b	20-pin connector
T20c	20-pin connector
T20q	20-pin connector
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	Only models with US equipment

Wiring Diagram AUDI A3 2012 - Connection 1 (convenience CAN bus - high) - in main wiring harness - Connection 1 (convenience CAN bus - low) - in main wiring harness

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, on lower section of left A-pillar
T20a	20-pin connector, on lower section of right A-pillar
T20f	20-pin connector
T20g	20-pin connector
T20l	20-pin connector, on left B-pillar
T20m	20-pin connector, on right B-pillar
T20n	20-pin connector
T20o	20-pin connector
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	Only left-hand drive models

Wiring Diagram AUDI A3 2012 - Connection 1 (convenience CAN bus - high) - in main wiring harness - Connection 1 (convenience CAN bus - low) - in main wiring harness

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, on lower section of left A-pillar
T20a	20-pin connector, on lower section of right A-pillar
T20f	20-pin connector
T20g	20-pin connector
T20l	20-pin connector, on left B-pillar
T20m	20-pin connector, on right B-pillar
T20n	20-pin connector
T20o	20-pin connector
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	Only right-hand drive models

Wiring Diagram AUDI A3 2012 - Connection 1 (convenience CAN bus - high) - in main wiring harness - Connection 1 (convenience CAN bus - low) - in main wiring harness - Connection 1 (LIN bus) in main wiring harness - Connection 2 (LIN bus) in main wiring harness

G273	Interior monitoring sensor
G397	Rain and light sensor
H12	Alarm horn
J393	Convenience system central control unit
J400	Wiper motor control unit
J519	Onboard supply control unit
J529	Anti-theft and tilt system control unit
J533	Data bus diagnostic interface
T6g	6-pin connector
T8h	8-pin connector
T12e	12-pin connector
T18	18-pin connector
T20d	20-pin connector
T52b	52-pin connector
T52c	52-pin connector
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
*	Up to April 2009
*2	Only models with automatic driving lights control
*3	For models with anti-theft alarm system
*4	From May 2009

Wiring Diagram AUDI A3 2012 - Connection 1 (infotainment CAN bus - high) - in main wiring harness - Connection 1 (infotainment CAN bus - low) - in main wiring harness

J402	Navigation operating electronics control unit
J415	Navigation system tuner for TV
J503	Control unit with display for radio and navigation
J533	Data bus diagnostic interface
R	Radio
R44	Amplifier with bass loudspeaker, on left in luggage compartment
R199	Connection for external audio sources
T12y	12-pin connector
T16g	16-pin connector
T54a	54-pin connector
B415	Connection 1 (infotainment CAN bus, high), in main wiring harness
B421	Connection 1 (infotainment CAN bus, low), in main wiring harness
*	Only models with radio
*2	see applicable current flow diagram
*3	Only models with connection for external audio sources - Audi music interface
*4	Only models with TV tuner
*5	Only models with radio navigation system
*6	Only models with no equipment for Japan

Wiring Diagram AUDI A3 2012 - Connection 1 (infotainment CAN bus - high) - in main wiring harness - Connection 1 (infotainment CAN bus - low) - in main wiring harness

J364	Auxiliary heater control unit
J503	Control unit with display for radio and navigation
J533	Data bus diagnostic interface
R36	Telephone transmitter and receiver unit
R146	Satellite radio
T2av	2-pin connector
T2bb	2-pin connector
T8q	8-pin connector
T8t	8-pin connector
T54	54-pin connector
B415	Connection 1 (infotainment CAN bus, high), in main wiring harness
B421	Connection 1 (infotainment CAN bus, low), in main wiring harness
*	Only models with equipment for Japan
*2	Only models with US equipment
*3	Only models with preparation for satellite radio

Wiring Diagram AUDI A3 2012 - Connection 1 (infotainment CAN bus - high) - in main wiring harness - Connection 1 (infotainment CAN bus - low) - in main wiring harness - Connection 1 (dash panel insert CAN bus high) in main wiring harness - Connection 1 (dash panel insert CAN bus low) in main wiring harness - Connection 1 (CAN bus diagnosis - high) - in main wiring harness - Connection 1 (CAN bus diagnosis - low) - in main wiring harness

J285	Control unit in dash panel insert
J533	Data bus diagnostic interface
T16	16-pin connector
T20d	20-pin connector
T32	32-pin connector
B415	Connection 1 (infotainment CAN bus, high), in main wiring harness
B421	Connection 1 (infotainment CAN bus, low), in main wiring harness
B708	Connection 1 (dash panel insert CAN bus high) in main wiring harness
B709	Connection 1 (dash panel insert CAN bus low) in main wiring harness
B713	Connection 1 (CAN bus diagnosis, high), in main wiring harness
B714	Connection 1 (CAN bus diagnosis, low), in main wiring harness
*	Gradually discontinued
*2	Up to April 2009
*3	From May 2009

AUDI A3 2012 Overview of control units

Overview of control units

1 -	Automatic gearbox control unit -J217-

q	for models with automatic gearbox (09G) only

q	Location →  chapter

q	Connector assignment → chapter

2 -	Wiper motor control unit -J400-

q	Location →  chapter

2 -	Battery monitor control unit -J367-

q	for models with battery in engine compartment only

q	Location → chapter

3 -	Mechatronic unit for dual clutch gearbox -J743-

q	Location for dual clutch gearbox (02E) → chapter

q	Connector assignment for dual clutch gearbox (02E) → chapter

q	Location for dual clutch gearbox (0AM) → chapter

q	Connector assignment for dual clutch gearbox (0AM) → chapter

q	Location for dual clutch gearbox (0B5) → chapter

q	Connector assignment for dual clutch gearbox (0B5) → chapter

4 -	Power steering control unit -J500-

q	Location →  chapter

q	Connector assignment → chapter

5 -	Left gas discharge light control unit -J343-

q	Location →  chapter

5 -	Power output module for left headlight -J667-

q	in headlight

6 -	Garage door operation control unit -J530-

q	Location →  chapter

q	Connector assignment → chapter

7 -	Radiator fan control unit -J293-

q	Location →  chapter

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

q	Location →  chapter

q	Connector assignment, 121 pin → chapter

q	Connector assignment, 154 pin → chapter

9 -	Right gas discharge light control unit -J344-

q	Location →  chapter

9 -	Power output module for right headlight -J668-

q	in headlight

10 -	Auxiliary heater control unit -J364-

q	under the longitudinal member on front right

q	Connector assignment → chapter

11 -	ABS control unit -J104-

q	Location →  chapter

q	Connector assignment, 47 pin → chapter

q	Connector assignment, 26 pin → chapter

Battery monitor control unit -J367-

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

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AUDI A3 2012 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 2012 Wiper motor control unit J400 Wiper motor control unit -J400-

Location: in plenum chamber atwindscreen wiper motor -V-

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AUDI A3 2012 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 2012 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 2012 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 2012 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 2012 Left gas discharge light control unit J343 / Right gas discharge light control unit J344 Left gas discharge light control unit -J343-/Right gas discharge light control unit -J344-

Location: on headlight housing

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AUDI A3 2012 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 2012 Radiator fan control unit J293 Radiator fan control unit -J293-

Location: am Motor für Radiator fan -V7-

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AUDI A3 2012 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 2012 ABS control unit J104 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 2012 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 2012 Overview of control units

Overview of control units

1 -	Headlight range control, control unit -J431-

q	Location → chapter

q	Connector assignment → chapter

2 -	Front passenger seat heating control unit -J727-

q	Location → chapter

q	Connector assignment → chapter

q	not for models with US equipment

2 -	Electronically controlled damping control unit -J250-

q	Location → chapter

q	Connector assignment → chapter

3 -	Sliding sunroof adjustment control unit -J245-

q	Location → chapter

q	Connector assignment → chapter

4 -	NOx sensor control unit -J583-

q	Location → chapter

q	not for models with US equipment

5 -	Rear left door control unit -J388-

q	Location → chapter

q	Connector assignment → chapter

q	for models with 5-door models only

6 -	Control unit in dash panel insert -J285-

q	Location → chapter

q	Connector assignment → chapter

7 -	Fuel pump control unit -J538-

q	Location → chapter

q	Connector assignment → chapter

8 -	Rear right door control unit -J389-

q	Location → chapter

q	Connector assignment → chapter

q	for models with 5-door models only

9 -	Driver seat heating control unit -J726-

q	Location → chapter

q	Connector assignment → chapter

q	not for models with US equipment

9 -	Voltage stabiliser -J532-

q	Location → chapter

q	Connector assignment → chapter

q	not for models with US equipment

10 -	Steering column electronics control unit -J527-

q	Location → chapter

q	Connector assignment → chapter

11 -	Driver door control unit -J386-

q	Location → chapter

q	Connector assignment → chapter

12 -	Onboard supply control unit -J519-

q	Location, from model year 2004 → chapter

q	Location, from model year 2010 → chapter

q	Connector assignment, from model year 2004 → chapter

q	Connector assignment, from model year 2010 → chapter

13 -	Heater control unit -J65-/Heater control unit -J162-

q	Location → chapter

13 -	Climatronic control unit -J255-

q	Location → chapter

q	Connector assignment → chapter

13 -	Air conditioning system control unit -J301-

q	in centre console

q	not for models with US equipment

14 -	Auxiliary air heater control unit -J604-

q	Location → chapter

q	Connector assignment → chapter

q	not for models with US equipment

15 -	data bus diagnostic interface -J533-

q	Location → chapter

q	Connector assignment → chapter

16 -	CD changer -R41-

q	Location → chapter

16 -	Tyre pressure monitor control unit -J502-

q	Location → chapter

q	Connector assignment → chapter

16 -	Anti-theft and tilt system control unit -J529-

q	Location → chapter

16 -	Connection for external audio source -R199-

q	Location → chapter

q	Connector assignment → chapter

17 -	Fresh air blower control unit -J126-

q	Location → chapter

18 -	Front passenger door control unit -J387-

q	Location → chapter

q	Connector assignment → chapter

19 -	Airbag control unit -J234-

q	Location → chapter

q	Connector assignment, 75 pin → chapter

q	Connector assignment, 84 pin → chapter

q	Connector assignment, 100 pin → chapter

20 -	Radio -R-/Control unit with display for radio and navigation system -J503-

q	Location → chapter

20 -	Navigation operating electronics control unit -J402-

q	Location → chapter

Anti-theft and tilt system control unit -J529-

Location: Behind the glove compartment-2-

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AUDI A3 2012 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 2012 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 2012 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 2012 NOx sensor control unit J583 NOx sensor control unit -J583- Location: on underbody, near NOx catalytic converter

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AUDI A3 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 CD changer R41 CD changer -R41- Location: In glove box -arrow-

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AUDI A3 2012 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 2012 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 2012 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 2012 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 2012 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 → Chapter

q	Connector assignment-J345- → Chapter

q	Connector assignment-J393- → Chapter

q	Connector assignment-J446-/ -J791- → Chapter

2 -	Control​ units​ on​ left​ in​ luggage​ compartment

q	Components: -J401-, -J415-, -R86-, -R146-, -R44-

q	Location of -J401- → Chapter

q	Location of -J415- → Chapter

q	Location of -J86- → Chapter

q	Location of -J146- → Chapter

q	Location of -J44- → Chapter

3 -	All-wheel drive control unit -J492-

q	Fitting location → Chapter

q	Connector assignment → Chapter

Control units on right in luggage compartment

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:

B -	16-pin connector -T16h-

C -	12-pin connector -T12h-

Connector assignment.

A -	Convenience system central control unit -J393-

Connector:

B -	18-pin​​ connector​ -T18-

C -	8-pin connector -T8g-

D -	6-pin connector -T6g-

Connector assignment.

A -	Parking aid control unit -J446-

Pin connector (4 channel parking aid):

B -	16-pin connector -T16f-

C -	Not assigned

D -	12-pin​ connector​ -T12i-

A -	Parking​ aid​ control​ unit -J446-/ Park assist steering control unit -J791-

Pin connector (8 channel parking aid):

B -	16-pin connector -T16f-

C -	12-pin connector -T12t-

D -	12-pin​ connector​ -T12i-

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-