Wiring Diagram VW POLO 2004 - Onboard supply control unit - battery - alternator - voltage regulator - starter - radiator fan - radiator fan thermal switch
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https://portal-diagnostov.com/license.html
Automotive Electricians Portal FZCO
Automotive Electricians Portal FZCO
| 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, brown |
| 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 supply control unit - diesel direct injection system control unit - relay for glow plugs - exhaust gas recirculation valve - engine glow plugs
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit |
| J519 | Vehicle voltage control unit |
| N18 | Exhaust gas recirculation valve |
| Q6 | Glow plugs (engine) |
| T2g | 2-pin connector |
| T2h | 2-pin connector |
| T6w | 6-pin connector, grey, left on end wall |
| T11a | 11-pin connector, white, on left end wall |
| T14 | 14-pin connector, in engine compartment, left |
| T121 | 121-pin connector |
| |
| 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 |
| D78 | Positive (+) connection -1- (30a), in engine compartment wiring harness |
| D102 | Connection -2-, in engine compartment wiring harness |
Wiring Diagram VW POLO 2004 - Diesel direct injection system control unit - brake light switch - kick-down switch - clutch pedal switch - brake pedal switch - idling switch - accelerator pedal position sender - intake manifold temperature sender
| F | Brake light switch |
| F8 | Kick-down switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch |
| F60 | Idling switch |
| G72 | Intake manifold temperature sender |
| G79 | Accelerator pedal position sender |
| J248 | Diesel direct injection system control unit |
| J519 | Onboard supply control unit |
| M9 | Left brake light bulb |
| M10 | Right brake light bulb |
| SB26 | Fuse -26- on fuse holder |
| T2l | 2-pin connector |
| T4d | 4-pin connector |
| T4h | 4-pin connector |
| T6c | 6-pin connector, blue, on 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 |
| 328 | Earth connection -2- (sender earth), in engine compartment wiring harness |
| A89 | Connection -2- (54), 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 |
Wiring Diagram VW POLO 2004 - Fuel temperature sender - modulating piston movement sender - fuel shut-off valve - metering unit - commencement of injection valve - data bus diagnostic interface - diagnostic socket
| E45 | Cruise control system switch |
| F268 | Additional heater, heater element contact switch |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit |
| J519 | Vehicle voltage control unit |
| J533 | Data bus diagnostic interface |
| N108 | Commencement of injection valve |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| SB17 | Fuse -17- on fuse box |
| T6n | 6-pin connector, blue, on end wall |
| T10c | 10-pin connector, behind dash panel |
| T10e | 10-pin connector |
| T11a | 11-pin connector, white, on left end wall |
| T11b | 11-pin connector, red, on end wall |
| T11c | 11-pin connector, blue |
| T16b | 16-pin connector, brown, diagnosis connection |
| T16c | 16-pin connector |
| T18a | 18-pin connector, brown |
| T41 | 41-pin connector |
| T121 | 121-pin connector |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| F36 | Connection (87a), in diesel direct injection system wiring harness |
| * | Only models with cruise control system |
Wiring Diagram VW POLO 2004 - Onboard supply control unit - diesel direct injection system control unit - engine speed sender - needle lift sender - intake manifold flap motor
| G28 | Engine speed sender |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit |
| J519 | Vehicle voltage control unit |
| T2l | 2-pin connector |
| T3m | 3-pin connector |
| T4 | 4-pin connector |
| T11a | 11-pin connector, white |
| T14 | 14-pin connector, in engine compartment, left |
| T16a | 16-pin connector, brown |
| T121 | 121-pin connector |
| V157 | Intake manifold flap motor |
| 156 | Earth connection, in diesel direct injection 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 |
Wiring Diagram VW POLO 2004 - Diesel direct injection system control unit - low heat output relay - high heat output relay - heater element fuse - auxiliary heating heater element - coolant temperature sender
Wiring Diagram VW POLO 2004 - Diesel direct injection system 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 |
| 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 |
| T14 | 14-pin connector, on left in engine compartment |
| 3 | Earth strap, engine - body |
| |
| A40 | Positive connection -1- (30), in instruments wiring harness |
| A101 | Connection -3- (87), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW POLO 2004 - Onboard supply control unit - oil pressure switch - fuel gauge - oil level and oil temperature sender - warning lamps - fuel gauge sender
| D | Ignition and starter switch |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G22 | Speedometer sender |
| G266 | Oil level and 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 |
| T2f | 2-pin connector |
| T3l | 3-pin connector |
| T6v | 6-pin connector, on left of bulkhead |
| 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 |
| 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 |
| A139 | Connection -3- (15), in dash panel wiring harness |
| * | From November 2002 only models with not fitted with ABS |
| ** | Equipment dependant |
VW POLO 2004 Overview of control units
Overview of control units | | | | q | From November 2007, Fitting Locations |
| 5 - | Parking aid control unit -J446- |
| 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 | Heated front seats control unit -J774- |
| 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 |
|
| 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 |
| Polo | Fitting Locations | No. 804 / 4 | | | q | From November 2007, Fitting Locations | | q | Discontinued from November 2005 | | Polo | Fitting Locations | No. 804 / 5 | | | Convenience system central control unit -J393- | | Under dash panel ⇒ Position 2 | | | | Connectors convenience system central control unit -J393- | | A - | Convenience system central control unit |
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 | | - | 22 - Brake fluid level warning contact | | - | 23 - Oil pressure switch | | - | 27 - Multifunction display | | - | 30 - Windscreen washer fluid level sender | | - | 31 - Ambient temperature sensor | | - | 32 - Terminal 31 for sender-output | | | | 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 |
| - | 4 - Right parking light |
| - | 5 - Terminal 15 - input |
| - | 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 |
| Rear right door control unit -J389- |
| A - | Rear right door control unit |
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 |
| Rear right door control unit -J389- |
| A - | Rear right door control unit |
VW POLO 2004 Parking aid control unit -J446-
Parking aid control unit -J446- | | 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 |
VW POLO 2004 Fuel pump control unit -J538-
Fuel pump control unit -J538- | | 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 |
| Rear left door control unit -J388- |
| A - | Rear left door control unit |
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 |
| Rear left door control unit -J388- |
| A - | Rear left door control unit |
VW POLO 2004 Heated driver seat control unit -J131-
Heated driver seat control unit -J131- | | On driver seat frame ⇒ -arrow- |
VW POLO 2004 Heated front passenger seat control unit -J132-
Heated front passenger seat control unit -J132- |
| On seat frame, front passenger side ⇒ -arrow- |
Notes:
| 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- |
| 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- | | | |
VW POLO 2004 Onboard supply control unit -J519-
Onboard supply control unit -J519- | | Under dash panel ⇒ Position 1 |
Connectors on onboard supply control unit -J519-
VW POLO 2004 Airbag control unit -J234-
Airbag control unit -J234- | | Under centre console at front ⇒ -arrow- |
Note:
| Earth connection via housing for vehicle earth! |
| | Connectors on airbag control unit -J234-
| Models with no side airbag |
| | Connectors on airbag control unit -J234-
| Models with no side airbag |
| | VW POLO 2004 Mobile telephone operating electronics control unit -J412-
Mobile telephone operating electronics control unit -J412- | | | | Polo | Fitting Locations | No. 804 / 24 |
|
| A - | Mobile telephone operating electronics control unit |
VW POLO 2004 | |
VW POLO 2004 Coupling station rear lid
Coupling station rear lid |
| 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 systemcoupling station heater, air conditioning system |
| 1 - | 2-pin connector -T2i-, black | | 2 - | 10-pin connector -T10c-, black | | 3 - | 2-pin connector -T2-, black | | | |
VW POLO 2004 Coupling station driver seat
Coupling station driver seat | | |
VW POLO 2004 coupling station front passenger seatcoupling station front passenger seat |
| | |
VW POLO 2004 Coupling station bulkhead (14-pin)
Coupling station bulkhead (14-pin) | | Polo | Fitting Locations | No. 806 / 6 |
|
VW POLO 2004 Coupling station left in engine compartment
Coupling station left in engine compartment | | 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 compartmentCoupling station, on right in engine compartment |
| 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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