VW POLO 2004 – CAN bus network (convenience) . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW POLO 2004 - Onboard supply control unit - Climatronic control unit - air conditioning system control unit - control unit with display in dash panel insert - data bus diagnostic interface - diagnosis connection

J255	Climatronic control unit
J285	Control unit with display in dash panel insert
J301	Air conditioning system control unit
J519	Onboard supply control unit
J533	Data bus diagnostic interface
T12	12-pin connector
T16a	16-pin connector, black
T16b	16-pin connector, diagnosis connection
T16e	16-pin connector
T18a	18-pin connector, brown
T18b	18-pin connector, black
T32a	32-pin connector
A76	Connection (diagnosis wire K), in dash panel wiring harness
A146	Connection (convenience CAN bus, high), in dash panel wiring harness
A147	Connection (convenience CAN bus, low), in dash panel wiring harness
*	up to May 2002

Wiring Diagram VW POLO 2004 - Onboard supply control unit - driver door control unit - front passenger door control unit - rear left door control unit - rear right door control unit

J386	Driver door control unit
J387	Front passenger door control unit
J388	Rear left door control unit
J389	Rear right door control unit
J519	Onboard supply control unit
T6l	6-pin connector, black, on left B-pillar
T6m	6-pin connector, black, on right B-pillar
T8h	8-pin connector
T8i	8-pin connector
T8j	8-pin connector
T8k	8-pin connector
T21	21-pin connector, on left A-pillar
T21a	21-pin connector, on right A-pillar
A146	Connection (convenience CAN bus, high), in dash panel wiring harness
A147	Connection (convenience CAN bus, low), in dash panel wiring harness

Wiring Diagram VW POLO 2004 - Convenience system central control unit - control unit with display for radio and navigation - onboard supply control unit

J393	Convenience system central control unit
J503	Control unit with display for radio and navigation system
J519	Onboard supply control unit
R	Radio
T8d	8-pin connector
T10s	10-pin connector
T20	20-pin connector
T23	23-pin connector
A146	Connection (convenience CAN bus, high), in dash panel wiring harness
A147	Connection (convenience CAN bus, low), in dash panel wiring harness
*	for models with radio only, from May 2005
**	vehicles with radio-ravigation “Rest of the World” only
***	for models with radio navigation system (models for Japan) only

VW POLO 2004 Overview of control units

Overview of control units    

q	Connectors

q	Connector T8c

q	From November 2007, Fitting Locations

5 -	Parking aid control unit -J446-

q	Fitting location

q	Connectors

Polo	Fitting Locations	No.  804 / 2

q	From November 2007, Fitting Locations

q	From November 2007, Fitting Locations

q	Heated driver seat control unit -J131-

q	Fitting location

q	Heated front seats control unit -J774-

q	Fitting location

11 -	Dipped headlight control unit, on/off (Coming home system) -J665-

q	⇒ Fitting locations; Relay assignment; Relay carrier (15 slot) page 803/3 position -7-

Polo	Fitting Locations	No.  804 / 3

q	Connectors

14 -	Air conditioning system control unit -J301-

q	⇒ Workshop manual; Heating; Air conditioning System; Heating, air conditioning system; Repair group 87

q	Connector, models with no side airbag

q	Connector, models with side airbag

q	Connectors

Polo Fitting Locations No.  804 / 4 https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture q   From November 2007, Fitting Locations q   Discontinued from November 2005 Polo Fitting Locations No.  804 / 5 Convenience system central control unit -J393- Fitting location: Under dash panel ⇒ Position 2   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture Connectors convenience system central control unit -J393- https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture A -  Convenience system central control unit Multi-pin connections: B -  Connector -T12i- q   Brown C -  Connector -T23- D -  Connector -T12c- q   Black VW POLO 2004 32-pin connector,T32a, on dash panel insert -J285-

Polo Fitting Locations No.  804 / 8  -  16 - Coolant shortage indicator sender  -  17 - Immobilizer reader coil  -  18 - Rear fog light warning lamp  -  19 - Fog light warning lamp  -  20 - Belt switch warning lamp  -  21 - Handbrake warning  -  22 - Brake fluid level warning contact  -  23 - Oil pressure switch  -  24 - Wake-up  -  25 - Vacant  -  26 - Vacant  -  27 - Multifunction display  -  28 - Vacant  -  29 - Vacant  -  30 - Windscreen washer fluid level sender  -  31 - Ambient temperature sensor  -  32 - Terminal 31 for sender-output   https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture VW POLO 2004 8-pin connector, T8c, on dash panel insert -J285-

8-pin connector, T8c, on dash panel insert -J285-

-	1 - Brake pad warning lamp

-	2 - Vacant

-	3 - Vacant

-	4 - Right parking light

-	5 - Terminal 15 - input

-	6 - Left parking light

-	7 - Terminal 30 - input

-	8 - Terminal 31 - input

 

VW POLO 2004 Right door control unit, to November 2007

Right door control unit, to November 2007

Front passenger door control unit -J387-

A -	Front passenger door control unit

Multi-pin connections:

B -	Connector -T8i-

C -	Not assigned

Rear right door control unit -J389-

A -	Rear right door control unit

Multi-pin connections:

B -	Connector -T8k-

C -	Not assigned

VW POLO 2004 Right door control unit, from November 2007

Right door control unit, from November 2007

Front passenger door control unit -J387-

A -	Front passenger door control unit

Multi-pin connections:

B -	Connector -T16f-

Rear right door control unit -J389-

A -	Rear right door control unit

Multi-pin connections:

B -	Connector -T16h-

VW POLO 2004 Parking aid control unit -J446-

Parking aid control unit -J446-

Fitting location:

On right behind luggage compartment side trim

1 -	Parking aid control unit -J446-

2 -	Rear parking aid warning buzzer -H15-

A -	16-pin connector -T16d-

B -	12-pin connector -T12n-

C -	2-pin connector -T2aa-

  Connectors for parking aid control unit -J446-

A -	Parking aid control unit

Connectors:

B -	Connector -T12n-

C -	Not assigned

D -	Connector -T16d-

VW POLO 2004 Fuel pump control unit -J538-

Fuel pump control unit -J538-

Fitting location:

Under rear bench seat ⇒ -arrow-

VW POLO 2004 Left door control unit, to November 2007

Left door control unit, to November 2007

Driver door control unit -J386-

A -	Driver door control unit

Multi-pin connections:

B -	Pin connector -T8h-

C -	Connector -T6aa-

Rear left door control unit -J388-

A -	Rear left door control unit

Multi-pin connections:

B -	Connector -T8j-

C -	Not assigned

VW POLO 2004 Left door control unit, from November 2007

Left door control unit, from November 2007

Driver door control unit -J386-

A -	Driver door control unit

Multi-pin connections:

B -	Connector -T16e-

Rear left door control unit -J388-

A -	Rear left door control unit

Multi-pin connections:

B -	Connector -T16g-

VW POLO 2004 Heated driver seat control unit -J131-

Heated driver seat control unit -J131-

Fitting location:

On driver seat frame ⇒ -arrow-

VW POLO 2004 Heated front passenger seat control unit -J132-

Heated front passenger seat control unit -J132-

Fitting location:

On seat frame, front passenger side ⇒ -arrow-

t	Illustration shows driver side. The front passenger side is similar.

t	Heated driver seat control unit - J131 - or Heated front passenger seat control unit - J132 - will be discontinued from November 2005 and will be replaced by Heated front seats control unit - J774

 

VW POLO 2004 Heated front seats control unit -J774- Heated front seats control unit -J774- Fitting location: On driver seat frame ⇒ -arrow-   Note: The Heated front seats control unit -J774- will replace from November 2005 the heated driver seat control unit -J131- and the heated front passenger seat control unit -J132-

https://portal-diagnostov.com/license.html https://portal-diagnostov.com/license.html Automotive Electricians Portal FZCO Automotive Electricians Portal FZCO Obtenez l'accès à tous les schémas de câblage de la voiture

VW POLO 2004 Onboard supply control unit -J519-

Onboard supply control unit -J519-

Fitting location:

Under dash panel ⇒ Position 1

Connectors on onboard supply control unit -J519-

XP1 - Connector -T6o-

t

Black

XP2 - Connector -T6j-

t

Brown

XP3 - Connector -T6x-

t

White

XP4 - Connector -T5a-

t

Black

XP5 - Connector -T5c-

t

Brown

XS1 - Connector -T6c-

t

Black

XS2 - Connector -T18b-

t

Black

XS3 - Connector -T6y-

t

Brown

XS4 - Connector -T18a-

t

Brown

XS5 - Connector -T6k-

t

Red

XS6 - Connector -T16a-

t

Black

VW POLO 2004 Airbag control unit -J234-

Airbag control unit -J234-

Fitting location:

Under centre console at front ⇒ -arrow-

Earth connection via housing for vehicle earth!

  Connectors on airbag control unit -J234-

Models with no side airbag

   

A -	Airbag control unit

Pin connector:

B -	Connector -T50-

Connectors on airbag control unit -J234-

Models with no side airbag

   

A -	Airbag control unit

Pin connector:

B -	Connector -T75-

VW POLO 2004 Mobile telephone operating electronics control unit -J412-

Mobile telephone operating electronics control unit -J412-

Fitting location:

On right A-pillar

 

Polo	Fitting Locations	No.  804 / 24

A -	Mobile telephone operating electronics control unit

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