Volkswagen Polo (9N; 2002 – 2009) – fuse and relay box diagram
Year od production:2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
This article covers the fourth-generation Volkswagen Polo (Mk4/9N), manufactured between 2002 and 2009. It includes fuse box diagrams for models from 2002 through 2009, provides details on the location of the fuse panels within the vehicle, and explains the function and layout of each fuse and relay.
Passenger Compartment Fuse Box
Fuse Box Location
The fuse panel is located behind an access panel on driver’s side edge of the instrument panel.
Fuse Box Diagram
Assignment of the fuses in the passenger compartment
| № | Amps | Function/component |
|---|---|---|
| 1 | 10A | Rear window wiper motor |
| 2 | 5A | Licence plate light |
| 3 | 5A | Rear left fog light bulb Trailer socket, rear fog light |
| 4 | 5A | Cruise control system switch Clutch pedal switch Brake pedal switch Radiator fan relay Fuel pump control unit |
| 5 | 5A | Engine control unit Exhaust gas recirculation |
| 6 | 5A | Headlight range control regulator |
| 7 | 7.5A/5A | 2002-2004: Exhaust gas recirculation Air-mass meter Oil level sensor Electrohydraulic steering Crankcase breather heater element 2005-2009: Oil level and oil temperature sender Power steering control unit Crankcase breather heater element |
| 8 | 5A | Onboard power supply control unit Mirror heating |
| 9 | 10A | 2002-2004 (FSI): Lambda probe Crankcase heater Pressure regulating valve |
| 10 | 5A | Mobile telephone operating electronics control unit (2006-2009) Control unit with display for radio and navigation system Onboard power supply control unit Radio |
| 11 | 5A | Mirror adjustment switch Folding exterior mirror control unit |
| 12 | 5A | Right tail light bulb Right side light bulb |
| 13 | 5A | Left side light bulb Left tail light bulb |
| 14 | 10A | Crankcase breather heater Secondary air pump relay Exhaust gas recirculation Intake manifold flap Hall sender |
| 15 | 10A | Multi-function switch Automatic gearbox control unit |
| 16 | 10A | lntermittent wiper switch Onboard power supply control unit Rear window wiper motor Windscreen and rear window washer pump |
| 17 | 5A | Engine control unit |
| 18 | 5A | Climatic, Climatronic, radiator fan control unit, navigation, circulation pump, illumination of functions, interior monitor sensor, mirror |
| 19 | 10A | Reversing light switch Parking aid control unit Left washer jet heater element Right washer jet heater element Selector lever illumination (2002-2004) |
| 20 | 5A | Control unit in dash panel insert |
| 21 | 10A | Right main beam bulb |
| 22 | 10A | Left main beam bulb |
| 23 | 10A | Traction control system switch TCS and ESP button Tyre pressure monitor display button Steering angle sender, only models with ESP ABS control unit |
| 24 | 10A/15A | 2002-2006: Onboard supply control unit, tank filler flap locking motor Onboard supply control unit, central locking motor in rear lid 2006-2009: Heated driver seat regulator Heated front passenger seat regulator Heated front seats control unit |
| 25 | 10A | Injectors Camshaft adjuster Thermostat heater Fuel purging valve |
| 26 | 10A | 2002-2004: Brake lights 2005-2009: Coolant pump relay (only BJX) |
| 27 | 5A | Steering angle sender Control unit in dash panel insert |
| 28 | 10A | Onboard supply control unit, relay for interior lights Door warning lamp relay |
| 29 | 5A | Climatronic control unit Air conditioning system control unit Mobile telephone operating electronics control unit 16-pin connector, diagnostics connection |
| 30 | 5A | Onboard power supply control unit, shift lock, rain sensor |
| 31 | 25A | Driver door control unit Driver side window regulator motor |
| 32 | 15A | 2002-2004: Seat heating 2005-2009: Brake light switch Brake light suppression relay |
| 33 | 15A | Alarm horn |
| 34 | 15A/20A | 2002-2004: Socket in luggage compartment (Variant) 2005-2006: 12V socket 2006-2009: Cigarette lighter 12V socket Blocking diode |
| 35 | 20A | Sliding sunroof adjustment control unit |
| 36 | 25A | Fresh air blower switch Fresh air blower control unit |
| 37 | 15A/20A | Ignition transformer |
| 38 | 25A | Rear left door control unit |
| 39 | 25A | Front passenger side door control unit |
| 40 | 10A/20A/30A | Engine control unit |
| 41 | 15A | Fuel pump |
| 42 | 15A/20A | NOx regulator, Lambda probe, exhaust gas cooling |
| 43 | 15A | Right headlight dipped beam bulb Right headlight range control motor |
| 44 | 15A | Left fog light bulb Right fog light bulb |
| 45 | 15A | Engine control unit |
| 46 | 20A | Onboard power supply control unit Automatic intermittent wash and wipe relay |
| 47 | 20A/30A | Onboard power supply control unit Heated rear window |
| 48 | 15A | Onboard power supply control unit, Turn signals |
| 49 | 10A/15A | 2002-2006: Cigarette lighter 2006-2009: Onboard supply control unit, tank filler flap locking motor Onboard supply control unit, central locking motor in rear lid |
| 50 | 15A | 2002-2004: Central locking 2005-2009: Anti-theft alarm ultrasonic sensor Comfort system central control unit |
| 51 | 15A | Control unit with display for radio and navigation system Dipped headlight control unit, on/off for Coming home system Radio |
| 52 | 20A | Headlight washer system relay Onboard supply control unit Treble tone horn, Bass tone horn |
| 53 | 25A | Rear right door control unit |
| 54 | 15A | Left headlight dipped beam bulb Headlight range control motor |
Relay panel
The relay panel is located under the driver’s side of the instrument panel.
Assignment of the fuses in the relay panel
| № | Amps | Description |
|---|---|---|
| 1 | 2002-2004: Driving school mode relay 2005-2009: Secondary air pump relay (engine code BJX) Folding exterior mirror control unit |
|
| 2 | 2005-2009: Folding exterior mirror control unit Driving school mode relay |
|
| 3 | Glow plug relay (Diesel engines) Motronic current supply relay (2002-2007) |
|
| 4 | Fuel pump relay | |
| 5 | 2002-2004: Warning lamps relay 2005-2007: Door warning lamps relay Brake light suppression relay |
|
| 6 | Headlight washer system relay | |
| 7 | 2002-2004: Starter inhibitor relay 2005-2009: Dipped headlight control unit, on/off (coming home system) |
|
| 8 | Low heat output relay (Diesel engines) Coolant pump relay (2005-2007, engine code BJX) |
|
| 9 | High heat output relay (Diesel engines) | |
| 10 | Motronic current supply relay Radiator fan relay (engine codes ASZ, BLT) Current supply relay (2002-2004) |
|
| 11 | X-contact relief relay | |
| 12 | Fuel supply relay | |
| 13 | Fuel pump relay (Petrol engines) | |
| 14 | 40A | Diesel engines fuses: Heater element fuse 1 Heater element fuse 2 Heater element fuse 3 |
| 15 | 2002-2004: Diesel direct injection system relay 2005-2009: Terminal 30 voltage supply relay (Diesel engines) Motronic current supply relay (Petrol engines, not engine codes BUD, BTS) Fuel pump relay (2005-2007, engine codes BMD, BME) |
|
| F1 | 10A | Trailer socket |
| F2 | 15A | Heated driver seat regulator Heated front passenger seat regulator Heated driver seat control unit Heated front passenger seat control unit |
| F3 | 10A/5A | Driving school mode Footwell light switch Warning buzzer switch Control unit in dash panel insert (South Africa, from 2006, 5A) |
| F4 | 10A | Driving school mode 12V socket |
Engine Compartment Fuse Box
Fuse Box Location
The main fuse box located on top of the battery in the engine compartment.
Fuse Box Diagram (version 1)
Assignment of the fuses in the engine compartment (version 1)
| № | Amps | Function/component |
|---|---|---|
| S162 | 175A | Alternator |
| S163 | 110A | Fuse holder B |
| S164 | 50A | Power steering control unit |
| S176 | 50A | Glow plug activation control unit Engine glow plugs Secondary air pump motor |
| S177 | 40A | Radiator fan (models with air conditioning system or Climatronic) |
| S178 | 40A | ABS control unit |
| S179 | 25A | ABS control unit |
| S180 | 30A | Radiator fan |
| S267 | – | – |
| S268 | 5A | Onboard power supply control unit |
| S269 | 5A | Radiator fan control unit |
| S270 | – | – |
| S271 | 5A | Automatic gearbox control unit |
| S272 | – | – |
| S273 | – | – |
| S274 | – | – |
Fuse Box Diagram (version 2)
Assignment of the fuses in the engine compartment (version 2)
| № | Amps | Function/component |
|---|---|---|
| S162 | 175A | Alternator |
| S163 | 110A | Fuse holder B |
| S164 | 40A | Radiator fan (models with air conditioning system or Climatronic) |
| S176 | 40A | ABS control unit |
| S177 | 50A | Power steering control unit |
| S178 | 50A | Glow plug activation control unit Engine glow plugs Secondary air pump motor |
| S179 | 25A | ABS control unit |
| S180 | 30A | Radiator fan |
| S267 | 5A | Radiator fan control unit |
| S268 | 10A | ABS control unit |
| S269 | 5A | Onboard power supply control unit |
| S270 | 5A | Diesel direct injection system control unit (models with engine code BMT) |
| S271 | 5A | Automatic gearbox control unit |
| S272 | – | – |
| S273 | – | – |
| S274 | – | – |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.