Fuses and relays Volkswagen Polo 4, 2001 - 2009

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 where all the electronic control units in the Volkswagen Polo 4 are located.  


Separately, we will highlight the purpose of fuses and relays with block diagrams in which they are located.

General arrangement of control units
Control unit
1 Air conditioning 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 antenna of the audio system
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, rear right (right curtain airbag) - luggage compartment, behind the right trim panel
9 Anti-theft system 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

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 - example

Diagram
Amps & Description
1 10A Wiper, rear window washer
2 5A Rheostat for instrument cluster illumination, license plate lamp
3 5A Rear fog lamps
4 5A Brake light switch (brake pedal position sensor), cruise control, engine management
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 marker, rear right side marker
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 Right headlight-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 unit 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 headlight-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
Description
1 Reserve
2 Relay in the power supply circuit of the Motronic system
3 (100) Glow plug relay
4 (53) Fuel supply pump relay (TDI)
5 (449) Relay for turning on the door marker lamp, door opening lamps
6 (53) Headlight washer pump relay
7 (126) Starter interlock relay
8 (53) Auxiliary heater relay 1, 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, except AXU)
14 Auxiliary heater fuse box
15 (109) Engine management system relay (diesel)

Some fuses can also be mounted in 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 vehicle configuration. 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 against overloading directly at the battery output.

Diagram
Amps & Description
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, cooling fan motor control unit
12 Reserve
13 5A automatic transmission
14 Reserve
15 Reserve
16 Reserve
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