VW POLO 2004 – Anti-locking brake system (ABS) with electronic differential lock (EDL), traction control system (TCS) and electronic stability program (ESP) . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW POLO 2004 - Onboard supply control unit - ABS control unit with EDL - brake light switch - ABS return flow pump relay - ABS inlet valve - ABS outlet valve - ABS return flow pump

A	Battery
D	Ignition/starter switch
F	Brake light switch
F47	Cruise control system brake pedal switch/diesel direct injection system
J...	Engine control units
J104	ABS control unit with EDL
J105	ABS return flow pump relay
J519	Onboard supply control unit
N99	Front right ABS inlet valve
N100	Front right ABS outlet valve
N101	Front left ABS inlet valve
N102	Front left ABS outlet valve
S178	Fuse 6 (30), in fuse holder on battery
S179	Fuse 7 (30), in fuse holder on battery
SB23	Fuse 23 on fuse holder
T9a	9-pin connector, yellow, on bulkhead
T11c	11-pin connector, blue
T42	42-pin connector
V39	ABS return flow pump
A2	Positive connection (15), in dash panel wiring harness
A89	Connection 2 (54), in dash panel wiring harness
A140	Connection (TCS), in dash panel wiring harness
D73	Positive connection (54), in engine compartment wiring harness
D101	Connection 1, in engine compartment wiring harness

Wiring Diagram VW POLO 2004 - Onboard supply control unit - ABS control unit - ABS hydraulic pump - inlet valves - outlet valves - ABS solenoid valve relay - speed sensor

G44	Rear right speed sensor
G45	Front right speed sensor
G46	Rear left speed sensor
G47	Front left speed sensor
J104	ABS control unit, in left engine compartment
J106	ABS solenoid valve relay
J519	Onboard supply control unit
N133	Rear right ABS inlet valve
N134	Rear left ABS inlet valve
N135	Rear right ABS outlet valve
N136	Rear left ABS outlet valve
T2k	2-pin connector
T2l	2-pin connector
T2m	2-pin connector
T2n	2-pin connector
T8x	8-pin connector
T9a	9-pin connector, yellow, on left of bulkhead
T42	42-pin connector
V64	ABS hydraulic pump
J3	Connection 1, in ABS wiring harness
J5	Connection 2, in ABS wiring harness
J7	Connection 3, in ABS wiring harness
J8	Connection 4, in ABS wiring harness

Wiring Diagram VW POLO 2004 - Onboard supply control unit - ABS control unit with EDL - TCS and ESP button - vehicle stabilization program valve - lateral acceleration sender - yaw rate sender - brake pressure sender 1

E1	Light switch
E256	TCS and ESP button
G200	Lateral acceleration sender
G201	Brake pressure sender 1
G202	Yaw rate sender
J104	ABS control unit with EDL
J519	Onboard supply control unit
L71	Traction control switch illumination
N225	Vehicle stabilization program switch valve 1
N226	Vehicle stabilization program switch valve 2
N227	Vehicle stabilization program high pressure valve 1
N228	Vehicle stabilization program high pressure valve 2
T3f	3-pin connector
T6c	6-pin connector
T6e	6-pin connector
T8x	8-pin connector, on left of bulkhead
T9a	9-pin connector, yellow, on left of bulkhead
T42	42-pin connector
238	Earth connection 1, in interior wiring harness
A4	Positive connection (58b), in dash panel wiring harness

Wiring Diagram VW POLO 2004 - Onboard supply control unit - ABS control unit with EDL - steering angle sender - handbrake warning switch

F9	Handbrake warning switch
G85	Steering angle sender
J104	ABS control unit with EDL
J285	Display control unit in dash panel insert
J519	Onboard supply control unit
T8x	8-pin connector, on left of bulkhead
T11a	11-pin connector, white, on left of bulkhead
T41	41-pin connector
T42	42-pin connector
A115	Connection (handbrake warning), in dash panel wiring harness
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
A132	Connection (TCS/ESP), in dash panel wiring harness
D159	Connection (high bus), in engine compartment wiring harness
D160	Connection (low bus), in engine compartment wiring harness

Wiring Diagram VW POLO 2004 - ABS control unit with EDL - control unit with display in dash panel insert - warning lamps - brake pad wear sender

G34	Front left brake pad wear sender
G37	Rear right brake pad wear sender
J285	Display control unit in dash panel insert
J519	Onboard supply control unit
K32	Brake pad warning lamp
K47	ABS warning lamp
K155	Electronic stability program warning lamp, TCS/ESP
SB27	Fuse 27 on fuse holder
T6q	6-pin connector, brown, on left of bulkhead
T6r	6-pin connector, brown, on left of bulkhead
T8c	8-pin connector
T16a	16-pin connector
T32a	32-pin connector
269	Earth connection (sender earth) 1, in dash panel wiring harness
327	Earth connection (sender earth), in engine compartment wiring harness
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
A132	Connection (TCS/ESP), in dash panel wiring harness
W31	Connection 1 (brake pad wear indicator), in rear wiring harness
W32	Connection 2 (brake pad wear indicator), in rear wiring harness
*	only models with rear drum brakes

VW POLO 2004 Overview of all control units

Overview of all control units    

6 -	Engine control units -J248- , -J623- , -J361- , -J220- , -J687- , -J537-

q	Fitting location

ABS control unit -J104-

Fitting location:

On right of bulkhead in engine compartment ⇒ -1-

 

Polo	Fitting Locations	No.  805 / 3

Connectors for ABS control unit -J104-

A -	ABS control unit

Connector:

B -	Connector -T38-

Polo	Fitting Locations	No.  805 / 4

Connectors for ABS control unit -J104-

A -	ABS control unit

Connector:

B -	Connector -T47-

VW POLO 2004

Glow plug activation control unit -J370- / automatic glow period control unit -J179-

Fitting location:

front left in engine compartment

Pin assignment in relay:

1 -	Output glow plug

2 -	Output glow plug

3 -	Output glow plug

4 -	Output glow plug

5 -	Not assigned

6 -	Terminal 15

7 -	Terminal 31

8 -	Not assigned

9 -	Activation

10 -	Activation

11 -	Terminal 30

 

VW POLO 2004 Automatic gearbox control unit -J217-

Automatic gearbox control unit -J217-

Fitting location:

in engine compartment before battery

 

Polo	Fitting Locations	No.  805 / 7

Connectors for automatic gearbox control unit -J217-

A -	Automatic gearbox control unit -J217-

Connector:

B -	Connector -T68-

VW POLO 2004 Power steering control unit -J500-

Power steering control unit -J500-

Fitting location:

In engine compartment, on front of left longitudinal member

1 -	Connector -T4r-

2 -	Connector -T2a-

3 -	Connector, depends on equipment -T3s- or -T4s-

4 -	Engine pump unit

 

VW POLO 2004 Radiator fan control unit -J293-

Radiator fan control unit -J293-

Fitting location:

Front left in engine compartment ⇒ -arrow A-

 

VW POLO 2004 NOx sensor control unit -J583-

NOx sensor control unit -J583-

Fitting location:

Under vehicle, near catalytic converter ⇒ -arrow-

A -	10-pin connector, black (T10)

B -	14-pin connector, black (T14x)

 

VW POLO 2004 Engine control unit - J...

Engine control unit - J...

Fitting location:

On left of bulkhead ⇒ -arrow-

  Engine control unit - J...

Note: see respective current flow diagram for engine control unit.

   

-	80-pin connector*

t	Note Connector T80 comprises a 52-pin and a 28-pin connector.

t	* Depending on equipment

t	Connector 121, see 207/12

t	Connector T94 and T60, see 207/13

Polo	Fitting Locations	No.  805 / 13

Engine control unit - J...   Note: Note: see respective current flow diagram for engine control unit.

A -	Engine control unit, 121-pin

Connectors:

B -	81-pin connector

C -	40-pin connector

Note Connector T121 comprises an 81-pin connector and a 40-pin connector.

Polo	Fitting Locations	No.  805 / 14

Engine control unit - J...   Note: Note: see respective current flow diagram for engine control unit.

A -	Engine control unit, 154-pin

Connectors:

B -	94-pin connector

C -	60-pin connector

Note Connector T154 comprises a 94-pin and a 60-pin connector.

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 קבל גישה לכל מכוניות דיאגרמות החיווט 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 קבל גישה לכל מכוניות דיאגרמות החיווט 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 קבל גישה לכל מכוניות דיאגרמות החיווט 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 קבל גישה לכל מכוניות דיאגרמות החיווט 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-

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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

VW POLO 2004 Overview of all earth points

Overview of all earth points

   

671 -

Earth point 1, on front of left longitudinal member

12 -	Earth point, on left in engine compartment

652 -

Earth point, engine and gearbox earth

11 -	Earth point, in battery box

640 -

Earth point 2, in engine compartment

29 -	Earth point, on left in engine compartment, behind battery

606 -

Earth point, under centre console, near selector lever

61 -	Earth point, on left C-pillar

Polo	Fitting Locations	No.  801 / 2

14 -	Earth point, on gearbox (depends on equipment)

13 -	Earth point, on right in engine compartment

15 -	Earth point, on cylinder head (depends on equipment)

614 -

Earth point 2, on right in engine compartment

610 -

Earth point (audio), at front under centre console

637 -

Earth point, airbag control unit

Earth point, in engine compartment

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

Discontinued, from 2006

 

12 - Earth point, on left in engine compartment 14 - Earth point, on gearbox   Note: Depends on equipment

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11 - Earth point, in battery box

640 - Earth point 2, in engine compartment

 

29 - Earth point, on left in engine compartment behind battery 61 - Earth point, left C-pillar

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Discontinued, from 2006

 

614 - Earth point 2, on right in engine compartment 15 - Earth point, on cylinder head   Note: Depends on equipment

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VW POLO 2004 Earth points, in interior

Earth points, in interior

637 - Earth point, airbag control unit

Earth connection via housing for vehicle earth!

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

Discontinued from November 2006

606 - Earth point, under centre console near gear stick

 

VW POLO 2004

VW POLO 2004 Coupling station rear lid

Coupling station rear lid

Fitting location:

On left C-pillar

1 -	5-pin connector, vacant

2 -	5-pin connector -T5b-, brown

3 -	5-pin connector -T5e-, black

 

VW POLO 2004 coupling station heater, air conditioning system coupling station heater, air conditioning system Fitting location: Near fresh air blower 1 -  2-pin connector -T2i-, black 2 -  10-pin connector -T10c-, black 3 -  2-pin connector -T2-, black

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VW POLO 2004 Coupling station driver seat

Coupling station driver seat

Fitting location:

under seat

1 -

Vacant

2 -	Connector -T6z-

3 -	Connector -T6g-

4 -

Vacant

5 -	Connector -T3p-

6 -	Connector -T12g-

7 -	Connector -T4a-

 

VW POLO 2004 coupling station front passenger seat coupling station front passenger seat Fitting location: under seat 1 -  Vacant 2 -  Vacant 3 -  Connector -T6d- 4 -  Vacant 5 -  Connector -T3r- 6 -  Vacant 7 -  Connector -T4c-

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VW POLO 2004 Coupling station bulkhead (14-pin)

Coupling station bulkhead (14-pin)

Pin connector:

A -	Connector -T8x-

q

Orange

B -	Connector -T6n-

q

Blue

C -	Connector -T6r-

q

Brown

D -	Connector -T11a-

q

White

E -	Connector -T6v-

q

Green

F -	Connector -T3a-

q

Grey

G -	Connector -T6q-

q

Red

Polo	Fitting Locations	No.  806 / 6

H -	Not assigned

I -	Connector -T11c-

q

Blue

K -	Connector -T11b-

q

Red

L -	Connector -T11d-

q

Brown

M -	Connector -T9a-

q

Yellow

N -	Connector -T6w-

q

Orange

P -	Connector -T12a-

q

White

VW POLO 2004 Coupling station left in engine compartment

Coupling station left in engine compartment

Fitting location:

t	Near suspension tower

1 -	2-pin connector -T2g-, glow plugs (engine codes ASY, AXR AMF, ASZ)

2 -	14-pin connector -T14-, black

 

VW POLO 2004 Coupling station, on right in engine compartment Coupling station, on right in engine compartment Fitting location: t  Near suspension tower 1 -  2-pin connector, charge pressure control solenoid valve* 2 -  2-pin connector, activated charcoal filter system solenoid valve* 3 -  2-pin connector, coolant shortage indicator sender * 4 -  6-pin connector, Lambda probe before catalytic converter* 5 -  2-pin connector, temperature sensor after DPF* 6 -  2-pin connector, temperature sensor before DPF* 7 -  2-pin connector, exhaust gas temperature sensor* * -  Not with all levels of equipment

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