AUDI A3 2004 — Automatic anti-dazzle interior mirror (with coming home function) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2004 - Automatic anti-dazzle interior mirror

E1	Lighting switch
G399	Light sensor
J519	Onboard power supply control unit
T6j	6-pin connector, black (connector C)
T12c	12-pin connector, black (connector B)
T16a	16-pin connector, black (connector E)
W	Interior light, front
Y7	Automatic anti-dazzle interior mirror
43	Earth point, lower part of right A pillar
372	Earth connection -7-, in main wiring harness
B473	Connection -9-, in main wiring harness
*	Phased-in modification
**	No longer fitted, phased-in modification

Wiring Diagram AUDI A3 2004 - Door control units - automatic anti-dazzle interior mirror

J386	Door control unit, driver's side
J387	Door control unit, front passenger's side
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)
Y7	Automatic anti-dazzle interior mirror
B427	Connection -1- (mirror signal), in main wiring harness
B428	Connection -2- (mirror signal), in main wiring harness
*	Only applies to models with automatic anti-dazzle interior mirror ⇒ applicable Current Flow Diagram: Convenience systems

AUDI A3 2004 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

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

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 2004 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 2004 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 2004 NOx sensor control unit J583 NOx sensor control unit -J583- Location: on underbody, near NOx catalytic converter

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AUDI A3 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 CD changer R41 CD changer -R41- Location: In glove box -arrow-

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AUDI A3 2004 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 2004 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 2004 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 2004 Overview of earth points in front part of vehicle

Overview of earth points in front part of vehicle    

1 -	Earth point, on right in plenum chamber -609-

q	Fitting location → Anchor

q	is dropped, from model year 2005

2 -	Earth point, on left in plenum chamber -607-

q	Fitting location → Anchor

3 -	Earth point, on left in engine compartment -12-

q	Fitting location ⇒ page → Anchor

4 -	Earth point, on left headlight -655-

q	Fitting location → Anchor

q	is dropped, from model year 2005

4 -	Earth point 4, on front of left longitudinal member -674-

q	Fitting location → Anchor

q	applicable from model year 2005

q	is dropped from model year 2009

5 -	Earth point 4, on front of left longitudinal member -674-

q	Fitting location → Anchor

q	is dropped, from model year 2005

5 -	Earth point, on left headlight -655-

q	Fitting location → Anchor

q	applicable from model year 2005

6 -	Earth point 2, on front of left longitudinal member -672-

q	is dropped from model year 2009

7 -	Earth point 1, on front of left longitudinal member -671-

q	Fitting location → Anchor

8 -	Earth point 3, on front of left longitudinal member -673-

q	Fitting location → Anchor

q	is dropped from model year 2009

9 -	Earth point, on right headlight -656-

q	Fitting location → Anchor

q	is dropped from model year 2009

10 -	Earth point, on left suspension strut -615-

q	Fitting location → Anchor

q	Only right-hand drive models

Overview of earth points in interior of vehicle

1 -	Earth point, rear left side panel -662-

q	Fitting location → Anchor

2 -	Earth point, lower part of left A-pillar -44-

q	Fitting location → Anchor

3 -	Earth point, left A-pillar -639-

q	Fitting location → Anchor

4 -	Earth point, next to steering column -42-

5 -	Earth point (audio), under centre console, front -610-

q	Fitting location → Anchor

6 -	Earth point, right A-pillar -638-

q	Fitting location → Anchor

7 -	Earth point, lower part of right A-pillar -43-

q	Fitting location ⇒ page → Anchor

8 -	Earth point, airbag control unit -637-

q	Fitting location → Anchor

q	is dropped, from model year 2005

Overview of earth points in rear part of vehicle (3-door models)

1 -	Earth point on right in luggage compartment -51-

q	Fitting location ⇒ page → Anchor

q	for 5-door models ⇒ page → Item Item → Item

2 -	Earth point, right C-pillar -62-

q	Fitting location → Anchor

q	for 5-door models ⇒ page → Item Item → Item

3 -	Earth point, on right in rear lid -53-

q	Fitting location → Anchor

q	for 5-door models ⇒ page → Item Item → Item

4 -	Earth point, left C-pillar -61-

q	Fitting location → Anchor

q	for 5-door models ⇒ page → Item Item → Item

Overview of earth points in rear part of vehicle (5-door models)

1 -	Earth point on right in luggage compartment -51-

q	Fitting location → Anchor

2 -	Earth point, right C-pillar -62-

q	Fitting location → Anchor

3 -	Earth point, on right in rear lid -53-

q	Fitting location → Anchor

4 -	Earth point, left C-pillar -61-

q	Fitting location → Anchor

Earth point, in engine compartment

12 Earth point, on left in engine compartment, near the battery -arrow- Torque: 15 Nm

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607 Earth point, on left in plenum chamber, windscreen wiper motor -arrow- Torque: 10 Nm

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609 Earth point, on right in plenum chamber, near air quality sensor -arrow- Torque: 10 Nm is dropped, from model year 2005

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656 Earth point, on right headlight -arrow- Torque: 10 Nm is dropped from model year 2009

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673 Earth point 3 at front of left longitudinal member -arrow- Torque: 10 Nm is dropped from model year 2009

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671 Earth point 1, on front left longitudinal member -arrow A- Torque: 15 Nm    655 Earth point, on left headlight, on longitudinal member -arrow B- Torque: 10 Nm is dropped, from model year 2005

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674 Earth point 4, on front left longitudinal member -arrow B- Torque: 10 Nm applicable from model year 2005 is dropped from model year 2009    655 Earth point, on left headlight, on longitudinal member -arrow C- Torque: 10 Nm applicable from model year 2005

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674 Earth point -4-, on front left longitudinal member -arrow C- Torque: 10 Nm is dropped, from model year 2005

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615 Earth point, on left suspension strut -arrow- Earth points, in interior

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43 Earth point, lower part of right A-pillar -arrow A- Torque: 10 Nm    638 Earth point, right A-pillar -arrow B- Torque: 10 Nm

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44 Earth point, lower part of left A-pillar -arrow A- Torque: 10 Nm    639 Earth point, left A-pillar -arrow B- Torque: 10 Nm

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610 Earth point (audio), under centre console, front -arrow A- Torque: 10 Nm    637 Earth point, airbag control unit -arrow B- Torque: 10 Nm is dropped, from model year 2005

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662 Earth point, rear left side panel -arrow- Torque: 10 Nm Earth point, in luggage compartment

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51 Earth point, on right in luggage compartment -arrow- Torque: 20 Nm

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53 Earth point, on right in rear lid -arrow- Torque: 10 Nm

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61 Earth point, left C-pillar -arrow- Torque: 10 Nm

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62 Earth point, right C-pillar -arrow- Torque: 10 Nm

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