VW POLO 2004 – 1.4 l/55kW Turbo-diesel engine with unit injectors, engine code BAY . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW POLO 2004 - Onboard supply control unit - battery - alternator - voltage regulator - starter - radiator fan - radiator fan thermal switch

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
D	Ignition/starter switch
F18	Radiator fan thermal switch
J519	Onboard supply control unit
S162	Fuse -1- (30), in battery fuse holder
S176	Fuse -4- (30), in battery fuse holder
S180	Fuse -8- (30), in battery fuse holder
T2	2-pin connector, near starter
T2v	2-pin connector
T3j	3-pin connector
T6n	6-pin connector, blue, on left of bulkhead
T11a	11-pin connector, white, on left of bulkhead
T18a	18-pin connector
V7	Radiator fan
1	Earth strap, battery - body
*	Does not apply to models with an air conditioning system ⇒ respective air conditioning system current flow diagram

Wiring Diagram VW POLO 2004 - Onboard power supply control unit - diesel direct injection system control unit - relay for glow plugs - glow plugs (engine)

J52	Glow plug relay
J248	Diesel direct injection system control unit
J519	Vehicle voltage control unit
SB17	Fuse in fuse box/relay plate
T2g	2-pin connector
T6w	6-pin connector, grey, left on end wall
T11a	11-pin connector, white, on left end wall
T11b	11-pin connector, red, on left end wall
T121	121-pin connector
Q6	Glow plugs (engine)
131	Earth connection -2-, in engine compartment wiring harness
A56	Positive (+) connection -2- (30), in instruments wiring harness
A152	Connection -5- (87), in dash panel wiring harness
D52	Positive (+) connection (15a), in engine compartment wiring harness
D78	Positive (+) connection -1- (30a), in engine compartment wiring harness
D102	Connection -2-, in engine compartment wiring harness

Wiring Diagram VW POLO 2004 - Brake light switch - kick-down switch - clutch pedal switch - brake pedal switch - idling switch - coolant temperature sender - accelerator pedal position sender - fuel temperature sender

F	Brake light switch
F8	Kick-down switch
F36	Clutch pedal switch
F47	Cruise control system brake pedal switch
F60	Idling switch
G62	Coolant temperature sender
G79	Accelerator pedal position sender
G81	Fuel temperature sender
J248	Diesel direct injection system control unit
J519	Onboard supply control unit
SB26	Fuse -26- on fuse holder
T4d	4-pin connector
T4h	4-pin connector
T6c	6-pin connector, blue, on left of bulkhead
T6n	6-pin connector
T11b	11-pin connector, red, on left of bulkhead
T11c	11-pin connector, blue, on left of bulkhead
T121	121-pin connector
A98	Positive connection -4- (30), in dash panel wiring harness
A100	Connection -2- (87), in dash panel wiring harness
D73	Positive connection (54), in engine compartment wiring harness
D101	Connection -1-, in engine compartment wiring harness
*	Up to May 2002
**	As of May 2002

Wiring Diagram VW POLO 2004 - Onboard power supply control unit - Hall sender - intake manifold pressure sender - exhaust gas recirculation valve - charge pressure control solenoid valve - intake manifold flap motor

E45	Cruise control system switch
F268	Additional heater, heater element contact switch
G40	Hall sender
G71	Intake manifold pressure sender
G72	Intake manifold temperature sender
J248	Diesel direct injection system control unit
J519	Onboard power supply control unit
N18	Exhaust gas recirculation valve
N75	Charge pressure control solenoid valve
T3j	3-pin connector
T4	4-pin connector
T4g	4-pin connector
T6p	6-pin connector
T10c	10-pin connector, behind dash panel, right
T11a	11-pin connector, white, on left end wall
T11c	11-pin connector, blue, on left end wall
T14	14-pin connector, left in engine compartment
T16c	16-pin connector
T41	41-pin connector, at steering column switch
T121	121-pin connector
V157	Intake manifold flap motor
E30	Connection (87a), in engine wiring harness
*	Only models with cruise control system

Wiring Diagram VW POLO 2004 - Diesel direct injection system control unit - engine speed sender - air mass meter - unit injector solenoid valves (cylinders 1-3) - diagnosis connection - data bus diagnostic interface

G28	Engine speed sender
G70	Air mass meter
J248	Diesel direct injection system control unit
J519	Onboard power supply control unit
J533	Data bus diagnostic interface
N240	Unit injector solenoid valve, No. 1 cyl.
N241	Unit injector solenoid valve, No. 2 cyl.
N242	Unit injector solenoid valve, No. 3 cyl.
T3m	3-pin connector
T5l	5-pin connector
T6n	6-pin connector, blue, on end wall
T6x	6-pin connector
T11a	11-pin connector, white
T16a	16-pin connector, brown
T16b	16-pin connector, diagnosis connection
T18a	18-pin connector, brown
T121	121-pin connector
A76	Connection (diagnosis wire K), in dash panel wiring harness
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
D159	Connection (high bus), in engine compartment wiring harness
D160	Connection (low bus), in engine compartment wiring harness
F27	Connection (screening), in diesel direct injection system wiring harness
*	From May 2002

Wiring Diagram VW POLO 2004 - Onboard supply control unit - diesel direct injection system control unit - low heat output relay - high heat output relay - heater element fuse - auxiliary heating heater element

A	Battery
J248	Diesel direct injection system control unit
J359	Low heat output relay
J360	High heat output relay
J519	Onboard supply control unit
S276	Heater element fuse -1-, in relay plate
S277	Heater element fuse -2-, in relay plate
S278	Heater element fuse -3-, in relay plate
T3n	3-pin connector, behind dash panel
T11c	11-pin connector, blue, on left of bulkhead
T121	121-pin connector
TV2	Terminal 30 wiring junction
Z35	Auxiliary heating heater element
A1	Positive connection (30a), in dash panel wiring harness
A52	Positive connection -2- (30), in dash panel wiring harness
A176	Connection (auxiliary heater), in dash panel wiring harness

Wiring Diagram VW POLO 2004 - Diesel direct injection system relay - fuel pump relay

J17	Fuel pump relay
J317	Diesel direct injection system relay
J519	Onboard supply control unit
SB4	Fuse -4- on fuse holder
SB14	Fuse -14- on fuse holder
SB40	Fuse -40- on fuse holder
SB41	Fuse -41- on fuse holder
T3s	3-pin connector, grey, on left of bulkhead
T6r	6-pin connector, brown, on left of bulkhead
T11b	11-pin connector, red, on left of bulkhead
A40	Positive connection-1- (30), in instruments wiring harness
A101	Connection -3- (87), in dash panel wiring harness
*	Only models from May 2002

Wiring Diagram VW POLO 2004 - Oil pressure switch - fuel pump - fuel gauge - oil level/oil temperature sender - warning lamps - fuel gauge sender

D	Ignition/starter switch
F1	Oil pressure switch
G	Fuel gauge sender
G1	Fuel gauge
G6	Fuel pump (pressurising pump)
G22	Speedometer sender
G266	Oil level/oil temperature sender
J285	Control unit with display in dash panel insert
J519	Onboard supply control unit
K3	Oil pressure warning lamp
K29	Glow period warning lamp
K105	Reserve fuel warning lamp
SB7	Fuse -7- on fuse holder
T3l	3-pin connector
T4j	4-pin connector
T6v	6-pin connector
T11a	11-pin connector, white, on left of bulkhead
T11b	11-pin connector, red, on left of bulkhead
T14	14-pin connector, on left in engine compartment
T32a	32-pin connector
81	Earth connection -1-, in dash panel wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
A2	Positive connection (15), in dash panel wiring harness
A27	Connection (speed signal), in dash panel wiring harness
*	As of November 2002 applies only to models with no ABS

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 Nabavite Pristup svim shemama ožičenja automobila 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 Nabavite Pristup svim shemama ožičenja automobila 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 Nabavite Pristup svim shemama ožičenja automobila 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 Nabavite Pristup svim shemama ožičenja automobila 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 Coupling station rear lid

VW POLO 2004

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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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 Overview of relay carrier locations

Overview of relay carrier locations    

1 -	Relay carrier (15-pin)

q	Vehicles from November 2001

q	Fitting location

q	Vehicles from May 2005

q	Fitting location

q	Vehicles from May 2008

q	Fitting​ location​

Relay carrier (15 slot), from November 2001

1 -	Driving school mode relay -746-

2 -	Not assigned

3 -	Glow plug relay -J52- (100)

3 -	Motronic current supply relay -J271- (103)

q	Only engine code AXU

4 -	Fuel pump relay -J17- (53)

q	Diesel engines

5 -	Warning lamps relay -J560- (449)

6 -	Headlight washer system -J39- (53)

7 -	Starter inhibitor relay -J207- (126)

8 -	Low heat output relay -J359- (53)

9 -	High heat output relay -J360- (100)

Polo	Fitting Locations	No.  803 / 3

10 -	Motronic current supply relay -J271- (100) or (429)

10 -	Current supply relay -J16- (429)

10 -	Current supply relay -J16- (53)

11 -	X-contact relief relay -J59- (18)

12 -	Fuel supply relay -J643- (404)

13 -	Fuel pump relay -J17- (167)

q	Petrol engines

14 -

Fuses

q	Only diesel

q	S276 - 40A

q	S277 - 40A

q	S278 - 40A

15 -	Diesel direct injection system relay -J317- (109)

VW POLO 2004 Relay carrier (15 slot), from May 2005

Relay carrier (15 slot), from May 2005

1 -	Secondary air pump relay -J299-

q	Only engine code BJX

1 -	Folding exterior mirror control unit -J351- (361)

2 -	Folding exterior mirror control unit -J351- (361)

2 -	Driving school mode relay -J746-

3 -	Glow plug relay -J52- (103)

q	Diesel engines

q	Not engine code BLT

3 -	Motronic current supply relay -J271- (100)

q	Only engine code AXU

4 -	Fuel pump relay -J17- (53)

q	Diesel engines

5 -	Door warning lamps relay -J560- (449)

5 -	Brake light suppression relay -J508- (489)

q	November 2005 to November 2006

6 -	Headlight washer system relay -J39- (53)

Polo	Fitting Locations	No.  803 / 5

7 -	Dipped headlight control unit, on/off (coming home system) -J665- (449)

8 -	Low heat output relay -J359- (53)

q	Diesel engines

8 -	Coolant pump relay -J235- (53)

q	Only engine code BJX

9 -	High heat output relay -J360- (100)

q	Diesel engines

10 -	Motronic current supply relay -J271- (429)

q	Only engine codes BMD and BME

10 -	Radiator fan relay -J26- (53)

q	Only engine codes ASZ and BLT

11 -	X-contact relief relay -J59- (100)

12 -	Fuel supply relay -J643- (404)

q	Petrol engines

q	Only engine codes BMD and BXU

Polo	Fitting Locations	No.  803 / 6

13 -	Fuel pump relay -J17- (167)

q	Petrol engines

q	Not engine code AXU

14 -

Fuses

q	Diesel engines

q	S276 - Heater element fuse 1 - 40A

q	S277 - Heater​ element​ fuse​ 2 - 40A

q	S278 - Heater​ element​ fuse​ 3 - 40A

15 -	Terminal 30 voltage supply relay -J317- (109)/(643)

q	Diesel engines

q	Petrol engines with engine code BJX or BUD

15 -	Starter inhibitor relay -J207- (53)

q	Petrol engines

q	Only engine code BKY with automatic gearbox

15 -	Motronic current supply relay -J271- (109)

q	Only engine codes BUD and BTS

15 -	Fuel pump relay -J17- (167)/(447)

q	Only engine codes BMD and BME

VW POLO 2004 Relay carrier (15 slot), from May 2008

Relay carrier (15 slot), from May 2008

1 -	Secondary air pump relay -J299- (100)

q	Only engine code BJX

1 -	Folding exterior mirror control unit -J351- (361)

2 -	Folding exterior mirror control unit -J351- (361)

2 -	Driving school mode relay -J746- (467)

3 -	Glow plug relay -J52- (100)

q	Diesel engines

q	Only engine codes AXR, BNV, BNM

4 -	Fuel pump relay -J17- (53)

q	Diesel engines

q	Petrol engines ¹)

5 -	Not assigned

6 -	Headlight washer system relay -J39- (53)

¹) Gradual introduction in model year 2008

Polo	Fitting Locations	No.  803 / 8

7 -	Dipped headlight control unit, on/off (coming home system) -J665- (456)

8 -	Low heat output relay -J359- (53)

q	Diesel engines

9 -	High heat output relay -J360- (100)

q	Diesel engines

10 -	Motronic current supply relay -J271- (429)

q	Only engine codes BBM, BZG

10 -	Radiator fan relay -J26- (53)

q	Only engine codes ASZ, BLT

11 -	X-contact relief relay -J59- (100)

12 -	Fuel supply relay -J643- (404)

q	Only engine codes BTS, BUD, BZG

Polo	Fitting Locations	No.  803 / 9

13 -	Fuel pump relay -J17- (53)

q	Petrol engines ¹)

14 -

Fuses

q	Diesel engines

q	S276 - Heater element fuse 1 - 40A

q	S277 - Heater​ element​ fuse​ 2 - 40A

q	S278 - Heater​ element​ fuse​ 3 - 40A

15 -	Terminal 30 voltage supply relay - J317 (643)

q	Diesel engines

15 -	Motronic current supply relay -J271- (643)

q	Petrol engines

q	Not engine codes BUD, BTS

¹) Discontinued with gradual introduction in model year 2008

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.