The 4th generation Volkswagen Polo was produced in 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 and 2009 with sedan and hatchback bodies. In 2005, the car was updated and an additional model made in the off-road style of the Cross Polo was introduced. In this publication, we will show you where all the electronic control units are located in the Volkswagen Polo 4. Separately, we will highlight the purpose of fuses and relays with box diagrams in which they are located.
Layout
Diagram
Assignment
| 1 | Air conditioner control unit – in the heater control panel |
| 2 | A / C / Heater Fan Motor Control Unit (with automatic temperature control) – Fan Unit |
| 3 | Antenna signal amplifier (audio system) – in the audio system antenna |
| 4 | Antenna signal amplifier (navigation system) – in the audio system antenna |
| 5 | Side impact sensor, driver’s side – under the front seat |
| 6 | Side gift sensor, on the passenger side – under the front seat |
| 7 | Side impact sensor, rear left (left curtain airbag) – luggage compartment, behind the left trim panel |
| 8 | Side impact sensor, right rear (right curtain airbag) – luggage compartment, behind the right trim panel |
| 9 | Anti-theft control unit -in multifunction control unit 2 |
| 10 | Anti-theft alarm sound – behind the rear left wheel arch trim |
| 11 | Volume change sensor (anti-theft system) – front interior lamp |
| 12 | Accumulator battery |
| 13 | Central locking control unit – in multifunction control unit 2 |
| 14 | Diagnostic connector (DLC) |
| 15 | Diagnostic unit – in multifunction control unit 1 |
| 16 | Door function control unit, front left (central locking / door mirror / power window) |
| 17 | Door function control unit, front right (central locking / door mirror / power window) |
| 18 | Door function control unit, rear left (central locking / power window) |
| 19 | Door function control unit, rear right (central locking / power window) |
| 20 | Cooling Fan Motor Control Unit – with A / C-AXU |
| 21 | Fuse / relay box dashboard 1 |
| 22 | Fuse / relay box dashboard 2 |
| 23 | Fuse / Relay Box, Engine Compartment – Above Battery |
| 24 | Additional fuse (5A / 7.5A / 10A) – at the rear of the audio system / navigation system control unit |
| 25 | Heater fan motor resistor (manual temperature control) – fan unit |
| 26 | Heater blower motor resistor (automatic temperature control) – in the air conditioning / heater blower motor control unit |
| 27 | Heater control unit – in the heater control panel – without air conditioner |
| 28 | Horn (s) – behind the front bumper |
| 29 | Immobilizer Control Unit – In Instrument Cluster |
| 30 | Immobilizer ring antenna – near the ignition switch |
| 31 | Turn signal / alarm relay – in multifunction control unit 1 |
| 32 | Instrument cluster control unit, digital multifunction display – on instrument cluster – functions: Immobilizer, warning devices and indicators |
| 33 | Warning buzzer about the lamps left on – in the instrument cluster |
| 34 | Multifunction control unit 1 – under dashboard fuse / relay box 2 – functions: Cruise control, electric drive / heated door mirrors, start relay (fuel system), rear window defogger, horn, direction indicators, hazard warning lights, lights interior, rear window cleaner, reversing light (automatic transmission), windshield washers, windshield wipers |
| 35 | Multifunctional control unit 2-functions: Anti-theft system, central locking, electric drive and heated door mirrors, power windows |
| 36 | Navigation antenna – in the audio system antenna |
| 37 | Navigation control unit – in navigation system / radio control panel |
| 38 | Outside temperature sensor – behind the front bumper |
| 39 | Power steering control unit |
| 40 | Rain sensor – inside rearview mirror |
| 41 | Driver’s seat heating control unit – under the front seat |
| 42 | Seat heating control unit, passenger – under the front seat |
| 43 | SRS control unit – behind center console |
| 44 | Sunroof control unit – behind the interior lighting lamp |
| 45 | Telephone antenna – in the audio system antenna |
| 46 | Telephone Interface Control Unit – Front Right Space |
| 47 | Electronic gearbox control unit |
| 48 | Vehicle speed sensor – except 11/02 -> without ABS – gearbox |
On-board electrical boxes
Fuse box
The fuse box is located in the passenger compartment, at the end of the dashboard on the driver’s side and is covered by a protective cover. Check the current fuse designation and numbers on the inside of the cover.
Photo for example
Diagram
Designation
| 1 | 10A Wiper, rear window washer |
| 2 | 5A Rheostat for instrument cluster illumination, license plate illumination lamp |
| 3 | 5A Rear fog lamps |
| 4 | 5A Brake light switch (brake pedal position sensor), cruise control, engine management system |
| 5 | 5A Engine management, exhaust gas circulation |
| 6 | 5A Headlight range control |
| 7 | 5A Engine management, power steering |
| 8 | 5A Heated door mirrors |
| 9 | 10A Engine management |
| 10 | 5A S-pin |
| 11 | 5A Electric door mirror heater |
| 12 | 5A Lamps front right side, rear right side |
| 13 | 5A Lamps, front left, rear left |
| 14 | 10A Engine management system, intake manifold heater |
| 15 | 10A automatic transmission |
| 16 | 10A Wiper, windshield washer |
| 17 | 5A Engine management |
| 18 | 5A Air conditioning system, air recirculation system (air conditioning / heater), anti-theft system, interior rearview mirror with auto-dimming, cooling fan motor control unit, instrument cluster, navigation system |
| 19 | 10A Heated windscreen washer nozzles, reversing lights |
| 20 | 5A Instrument cluster |
| 21 | 10A RH headlamp-high beam |
| 22 | 10A LH headlamp – high beam |
| 23 | 10A Anti-lock braking system, stability control system |
| 24 | 10A Multifunction control unit 1 |
| 25 | 10A Engine management |
| 26 | 10A Stop lights |
| 27 | 5A Anti-lock braking system (with ESP), instrument cluster |
| 28 | 10A Interior lamps |
| 29 | 5A Air conditioning system, diagnostic connector (DLC), telephone |
| 30 | 5A Multifunction control module 1, automatic transmission selector lock system, rain sensor (windshield wiper) |
| 31 | 25A Front left door power window motor |
| 32 | 15A Heated seats |
| 33 | 15A Anti-theft alarm horn |
| 34 | 15A Accessory power connector |
| 35 | 20A Hatch |
| 36 | 25A Air conditioner / heater blower motor |
| 37 | 15А20А Ignition coil (s), ignition system switch (s) |
| 38 | 25A Rear left door power window motor |
| 39 | 25A Front Right Door Window Regulator Motor |
| 40 | 10A / 30A Engine management |
| 41 | 15A Fuel pump, fuel supply pump – petrol / TDI |
| 42 | 20A Engine management – AXU |
| 43 | 15A RH headlamp-low beam, headlight range control |
| 44 | 15A Fog lights |
| 45 | 15A Engine management – AUB |
| 46 | 20A Wiper, windshield washer |
| 47 | 20A Heated rear window (^ 02/04) |
| 48 | 15A Direction indicators, hazard warning lights |
| 49 | 15A Cigarette lighter |
| 50 | 15A Multifunctional control unit 2, anti-theft system, central locking |
| 51 | 15A Audio system, navigation system |
| 52 | 20A Horn, wiper, windshield washer |
| 53 | 25A Rear right door power window motor |
| 54 | 15A Left headlight – low beam, headlight range control |
The fuse is responsible for the cigarette lighter 49 at 15A.
Relay box
The relay box is located behind the instrument panel trim on the driver’s side. The Polo has a single relay box with the same type of sockets.
Diagram
Assignment
| 1 | Reserve |
| 2 | Relay in the power supply circuit of the Motronic system |
| 3 | (100) Glow plug relay |
| 4 | (53) Relay, fuel supply pump (TDI) |
| 5 | (449) Relay for door marker lamp, door opening lamp |
| 6 | (53) Headlight washer pump relay |
| 7 | (126) Starter interlock relay |
| 8 | (53) Relay 1 auxiliary heater, low power |
| 9 | (100) Auxiliary heater relay 2, high power (diesel) |
| 10 | (53/429) Engine management system relay (petrol, except AXU) |
| 11 | (18) Ignition auxiliary circuits relay, X terminal unload relay |
| 12 | (404) Start relay (fuel system) (petrol, except AXU) |
| 13 | (167) Fuel pump relay (petrol engine, except AXU) |
| 14 | Auxiliary heater fuse box |
| 15 | (109) Engine management system relay (diesel) |
Some fuses can also be attached to this unit, for example, an additional 40A heater.
Main fuse box
It is located on the battery cover. The number of fuses included in it depends on the specific configuration of the vehicle. The block holders can hold a maximum of 6 blade fuses and 10 blade fuses. The connection to the positive terminal is made by means of a wire with a terminal lug and a screw. Fuses protect individual on-board circuits from overloading directly at the battery output.
Protected components
| 1 | 110A Generator |
| 2 | 110 Salon, ignition lock |
| 3 | 50A Power steering |
| 4 | 50A Engine management system relay (AXU), exhaust air pump |
| 5 | 40A Cooling fan motor |
| 6 | 40A Anti-lock braking system (ABS) |
| 7 | 40A Anti-lock braking system (ABS) |
| 8 | 30A Cooling fan motor |
| 9 | Reserve |
| 10 | 5A Multifunction control unit 1 |
| 11 | 5A Air conditioning system, cooling fan motor control unit |
| 12 | Reserve |
| 13 | 5A automatic transmission |
| 14 | Reserve |
| 15 | Reserve |
| 16 | Reserve |
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If you have any questions, write in the comments
Hi I Have A Vw Polo 2007 Problem With Alarm Horn Keep Going Off Fault Code 01134 Alarm Horn (H12) Can Tell Me Is Situated Under Rear Wheel Arch Liner Passenger Side or Under Windscreen In Middle Under Plastic Scuttle Panel Under Wiper Arms ??? If You Can Let Me No Thanks Jason.
Hi, I have cross polo 2007 it got a problem of stalling after 15 minutes, when u try to start immediately after stall it doesn’t start, 5 minutes later it start and stall after that 15 minutes.
Hi There, I have a 2008 Polo 1.6i. I recently used my car to boost another car because the battery was dead. The next day I noticed that My Dash Lights are not working, The back light of the radio isnt working. I checked the manual and there is no fuse for this. The back lights for the electronic windows are also off, as well as the number plate lights
Any suggestions ???
Check the fuse numbered 2
Hi I have a 2009 polo tdi with starting and running problems. I’ve looked for relay 109 but there’s another relay number 634 in position no 15 and relay 109 doesn’t appear yo be anywhere.
Excelente información, por si no es mucha molestia, me podrían proporcionar el diagrama de un polo 1.6 9n 2004
Hey there, I have the late 2009 polo with the 2010 onwards design, does anyone know which fuse number is for fuel injectors?
Hi my rear left hand side light not working only harzads working ,any suggestions pls
Hi, polo vivo 2008 aircon relay position please
Hi I have a polo 1.6 engine Bah 2006 model, when I start the car it starts but after some few seconds it dies what could be the problem, any 1 who can he3
Where does flasher unit located Volkswagen polo 9N2
Hi I have 2007 vw polo,I drove from somewhere at night and came and park my car,the following day I realised that I ve lost headlights,rear window wiper Aircon and the blower motor ,please can anyone help what’s wrong with my car I ve tested all the fuses are okay.
Did you fix it? I have exactly the same
HI, I’m helping a friend out – he’s got a 2006 polo 1.6 9n motor
the fan won’t go on even after replacing fan switch/sensor and temp switch/sensor
could it be the relay?
The fan only goes on when plug is earthed
Hey can you please help me at night my dash light in the car dont work i cant see anything on my dash board all the warning symbols and icons are working on my dash board but not my dash light that light up my dashboard im driving a polo vivo 1.4 2014 model
Here are a few things you can try:
Check the dimmer switch: Some cars have a dimmer switch that allows you to adjust the brightness of the dashboard lights. Make sure the switch is turned up and try adjusting it to see if the lights come on.
Check the fuses: Your dashboard lights may be controlled by a fuse. Check your owner’s manual or our diagrams to find the location of the fuse box and check the relevant fuse(s) to see if they are blown. If a fuse is blown, replace it with one of the same amperage.
Check the bulbs: Your dashboard lights may be powered by bulbs that have burned out. You can try replacing them with new ones to see if that fixes the problem.
Check the wiring: If the above steps don’t work, there may be a problem with the wiring that powers the dashboard lights. In this case, it may be best to take your car to a mechanic to have them diagnose and repair the issue.
Hey I have a 03 polo and just resently my dim lights stopped working so I checked the fuses and the bulbs but they are all fine. I think it’s something to do with a switch but I’ve no idea where to start if anyone knows?
Trying to locate Airbag fuse SRS for a 2 door 2007 Polo club.
Also relay as am having trouble getting direction for location of sensor.
Regards Keith.
My three doors are locked the front one is on off. What fuse must l check please help.
Where the fuse for miiror adjustment
Thank u