Wiring Diagram VW POLO 2003 - Battery - Ignition/starter switch - Onboard supply control unit - Fuse 2 (30) - in battery fuse holder - Fuse 10 (30) - in battery fuse holder - Terminal 30 wiring junction
| A | Battery |
| B | Starter |
| D | Ignition/starter switch |
| E19 | Parking light switch |
| J519 | Onboard supply control unit |
| SB10 | Fuse 10 on fuse holder B |
| S163 | Fuse 2 (30), in battery fuse holder |
| S268 | Fuse 10 (30), in battery fuse holder |
| T3a | 3-pin connector |
| T6n | 6-pin connector |
| T12a | 12-pin connector |
| T18a | 18-pin connector |
| TV2 | Terminal 30 wiring junction |
| T41 | 41-pin connector |
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| A2 | Positive connection (15), in dash panel wiring harness |
| A15 | Positive connection (15), in instrument wiring harness |
| A21 | Connection (86s), in dash panel wiring harness |
| A32 | Positive connection (30), in dash panel wiring harness |
| A40 | Positive connection 1 (30), in dash panel wiring harness |
| A52 | Positive connection 2 (30), in dash panel wiring harness |
| A104 | Positive connection 2 (15), in dash panel wiring harness |
Wiring Diagram VW POLO 2003 - Heated rear window button - X-contact relief relay - Onboard supply control unit - Cigarette lighter
| E230 | Heated rear window button |
| J59 | X-contact relief relay |
| J519 | Onboard supply control unit |
| L76 | Button illumination bulb |
| T5a | 5-pin connector |
| T6b | 6-pin connector |
| T6c | 6-pin connector |
| T18a | 18-pin connector |
| U1 | Cigarette lighter |
| 80 | Earth connection 1, in dash panel wiring harness |
| 81 | Earth connection 1, in dash panel wiring harness |
| 110 | Earth connection 2, in dash panel wiring harness |
| 439 | Earth connection 3, in dash panel wiring harness |
| 605 | Earth point, on top end of steering column |
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| A4 | Positive connection (58b), in dash panel wiring harness |
| A33 | Connection (75), in dash panel wiring harness |
| A34 | Connection (75x), in dash panel wiring harness |
Wiring Diagram VW POLO 2003 - Intermittent wiper switch - Rear wiper switch - Intermittent wiper regulator - Onboard supply control unit - Windscreen wiper motor
| E22 | Intermittent wiper switch |
| E34 | Rear wiper switch |
| E38 | Intermittent wiper regulator |
| J31 | Automatic intermittent wash and wipe relay |
| J519 | Onboard supply control unit |
| T4i | 4-pin connector |
| T5a | 5-pin connector |
| T6v | 6-pin connector |
| T12a | 12-pin connector |
| T16a | 16-pin connector |
| T18a | 18-pin connector |
| T41 | 41-pin connector |
| V | Windscreen wiper motor |
| 199 | Earth connection 3, in dash panel wiring harness |
| 335 | Earth connection 5, in dash panel wiring harness |
| A156 | Connection (53c), in dash panel wiring harness |
Wiring Diagram VW POLO 2003 - Bonnet contact switch - Right backrest contact switch - Onboard supply control unit - Rear window wiper motor - Windscreen and rear window washer pump - Heated rear window
| F266 | Bonnet contact switch |
| F316 | Right backrest contact switch |
| J48 | Heated rear window control relay |
| J519 | Onboard supply control unit |
| T2a | 2-pin connector |
| T2v | 2-pin connector |
| T4al | 4-pin connector |
| T5b | 5-pin connector |
| T5c | 5-pin connector |
| T5f | 5-pin connector |
| T5g | 5-pin connector |
| T6v | 6-pin connector |
| T12a | 12-pin connector |
| T16a | 16-pin connector |
| T18a | 18-pin connector |
| V12 | Rear window wiper motor |
| V59 | Windscreen and rear window washer pump |
| Z1 | Heated rear window |
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| 53 | Earth point, on right in rear lid |
| 98 | Earth connection, in rear lid wiring harness |
| 287 | Earth connection, in rear lid feeder wiring harness |
| 612 | Earth point, centre on rear lid |
| A102 | Connection (windscreen wiper), in dash panel wiring harness |
Wiring Diagram VW POLO 2003 - Fresh air blower switch - Onboard supply control unit - Fresh air blower series resistor with overheating fuse - Fresh air blower - Fresh air and air recirculation flap control motor
| E9 | Fresh air blower switch |
| E159 | Fresh air and air recirculation flap switch |
| F268 | Auxiliary heating heater element contact switch |
| J248 | Diesel direct injection system control unit |
| J519 | Onboard supply control unit |
| K114 | Fresh air and air recirculation warning lamp |
| L16 | Fresh air regulator illumination bulb |
| N24 | Fresh air blower series resistor with overheating fuse |
| T2u | 2-pin connector |
| T4e | 4-pin connector |
| T5h | 5-pin connector |
| T6s | 6-pin connector |
| T10c | 10-pin connector |
| T11c | 11-pin connector |
| T16c | 16-pin connector |
| V2 | Fresh air blower |
| V154 | Fresh air and air recirculation flap control motor |
| 189 | Earth connection 1, in heater wiring harness |
| B135 | Connection 1 (15a), in interior wiring harness |
| L66 | Connection, in heater blower wiring harness |
| * | According to equipment |
Wiring Diagram VW POLO 2003 - Light switch - Onboard supply control unit
| E1 | Light switch |
| E4 | Headlight dipper and flasher switch |
| E20 | Switch and instrument illumination regulator |
| J519 | Onboard supply control unit |
| M41 | Left tail light and rear fog light bulb |
| SB3 | Fuse 3 on fuse holder B |
| T6b | 6-pin connector |
| T6l | 6-pin connector |
| T17 | 17-pin connector |
| T41 | 41-pin connector |
| B169 | Positive connection 1 (30), in interior wiring harness |
Wiring Diagram VW POLO 2003 - Onboard supply control unit - Fuse holder B
| J519 | Onboard supply control unit |
| M1 | Left side light bulb |
| M3 | Right side light bulb |
| M29 | Left headlight dipped beam bulb |
| M31 | Right headlight dipped beam bulb |
| SB | Fuse holder B |
| SB12 | Fuse 12 on fuse holder B |
| SB13 | Fuse 13 on fuse holder B |
| SB16 | Fuse 16 on fuse holder B |
| SB18 | Fuse 18 on fuse holder B |
| SB20 | Fuse 20 on fuse holder B |
| SB43 | Fuse 43 on fuse holder B |
| SB54 | Fuse 54 on fuse holder B |
| T10a | 10-pin connector |
| T10b | 10-pin connector |
| T11a | 11-pin connector |
| T12a | 12-pin connector |
| A9 | Positive connection (56b), in instruments wiring harness |
| E107 | Connection (left parking light), in dash panel wiring harness |
| E108 | Connection (right parking light), in dash panel wiring harness |
Wiring Diagram VW POLO 2003 - Onboard supply control unit - Fuse holder B - 12 V socket
| J519 | Onboard supply control unit |
| SB | Fuse holder B |
| SB1 | Fuse 1 on fuse holder B |
| SB34 | Fuse 34 on fuse holder B |
| SB36 | Fuse 36 on fuse holder B |
| SB46 | Fuse 46 on fuse holder B |
| SB47 | Fuse 47 on fuse holder B |
| SB48 | Fuse 48 on fuse holder B |
| SB49 | Fuse 49 on fuse holder B |
| SB52 | Fuse 52 on fuse holder B |
| T3w | 3-pin connector |
| T16a | 16-pin connector |
| U5 | 12 V socket, in luggage compartment |
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| 86 | Earth connection 1, in rear wiring harness |
Wiring Diagram VW POLO 2003 - Horn plate - Horn or dual tone horn - Onboard supply control unit - Data bus diagnostic interface - Fuse holder B - Diagnostic connection
| F138 | Airbag coil connector and return ring with slip ring |
| H | Horn plate |
| H1 | Horn or dual tone horn |
| J317 | Terminal 30 voltage supply relay |
| J413 | Horn relay |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| SB | Fuse holder B |
| SB27 | Fuse 27 on fuse holder B |
| SB28 | Fuse 28 on fuse holder B |
| SB29 | Fuse 29 on fuse holder B |
| SB30 | Fuse 30 on fuse holder B |
| T2l | 2-pin connector |
| T5c | 5-pin connector |
| T6j | 6-pin connector |
| T6q | 6-pin connector |
| T16a | 16-pin connector |
| T16b | 16-pin connector |
| T18a | 18-pin connector |
| T41 | 41-pin connector |
| U31 | Diagnostic connection |
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| 124 | Earth connection, in right side engine compartment wiring harness |
| 135 | Earth connection 2, in dash panel wiring harness |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| A164 | Positive connection 2 (30a) in dash panel wiring harness |
| B150 | Positive connection 2 (30a), in interior wiring harness |
Wiring Diagram VW POLO 2003 - Immobiliser reader coil - Coolant shortage indicator sender - Windscreen washer fluid level sender - Control unit in dash panel insert - Immobiliser control unit - Onboard supply control unit - Dash panel insert
| D2 | Immobiliser reader coil |
| G32 | Coolant shortage indicator sender |
| G33 | Windscreen washer fluid level sender |
| J285 | Control unit in dash panel insert |
| J362 | Immobiliser control unit |
| J519 | Onboard supply control unit |
| K | Dash panel insert |
| K2 | Alternator warning lamp |
| K19 | Seat belt warning system warning lamp |
| K92 | Servotronic warning lamp |
| K166 | Door open warning lamp |
| T6q | 6-pin connector |
| T6r | 6-pin connector |
| T8c | 8-pin connector |
| T11b | 11-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 |
Wiring Diagram VW POLO 2003 - Driver side belt switch - Handbrake warning switch - Brake fluid level warning contact - Control unit in dash panel insert - Onboard supply control unit - Dash panel insert
| E24 | Driver side belt switch |
| F9 | Handbrake warning switch |
| F34 | Brake fluid level warning contact |
| J104 | ABS control unit |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K | Dash panel insert |
| K28 | Coolant temperature and coolant shortage warning lamp |
| K106 | Washer fluid low warning lamp |
| K118 | Brake system warning lamp |
| K193 | Rear seat backrest lock warning lamp |
| T6z | 6-pin connector |
| T8c | 8-pin connector |
| T8x | 8-pin connector |
| T11b | 11-pin connector |
| T18b | 18-pin connector |
| T32a | 32-pin connector |
| Y2 | Digital clock |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 238 | Earth connection 1, in interior wiring harness |
| A115 | Connection (handbrake warning), 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 |
VW POLO 2003 Overview of control units
Overview of control units | | | | q | From November 2007, Fitting Locations |
| 5 - | Parking aid control unit -J446- |
| 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- |
| 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 2003 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 2003 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 2003 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 2003 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 2003 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 2003 Fuel pump control unit -J538-
Fuel pump control unit -J538- | | Under rear bench seat ⇒ -arrow- |
VW POLO 2003 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 2003 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 2003 Heated driver seat control unit -J131-
Heated driver seat control unit -J131- | | On driver seat frame ⇒ -arrow- |
VW POLO 2003 Heated front passenger seat control unit -J132-
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VW POLO 2003 Heated front seats control unit -J774- |
VW POLO 2003 Onboard supply control unit -J519- | Onboard supply control unit -J519- |
| Under dash panel ⇒ Position 1 |
Connectors on onboard supply control unit -J519-
VW POLO 2003 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 2003 Mobile telephone operating electronics control unit -J412-
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