Audi A4 (B6, 2000 - 2005) fuses and relays

The Audi 80, since 1995 the A4, is a family of mid-range models manufactured by the German manufacturer. The internal designation of cars in this series is "type B". In this material, we will analyze in detail the fuse diagrams of the Audi A4 (B6) 2nd generation  2001, 2002, 2003, 2004, 2005 with gasoline and diesel engines.

general view of the car
Here you will find the locations and photos of the mounting blocks. Separately, we note the fuses responsible for the cigarette lighter and fuel pump.

In the engine compartment

Location of the fuse box in the engine compartment of the car
It is located on the right side of the engine compartment behind the protective lining.


Photo - an example (removed for clarity).

Scheme of elements in the motor block
No. Purpose A
1 Engine electronics, brake pedal position sensor 15
2 Exhaust air pump 40
3 Automatic transmission 15
R1a Automatic transmission relay -
R1b Not used -
R2 Exhaust air pump -
R3 Motronic power supply relay or main relay -
R4 Start Inhibit Switch Relay and Reverse Relay or Automatic Transmission Relay -

In the cabin

Location of the main fuse box in the passenger compartment.
The main unit is located at the end of the dashboard behind the trim. For access, it is necessary to dismantle the lining by prying it with a screwdriver.


General form.

Assigment of fuses in the Audi A4 (B6) passenger compartment
No. Description A
1 Air conditioning system 10
2 Footwell lamps, glove compartment lamp 5
3 Windshield washer jet heaters 5
4 Cooling fan motor control unit 5
5 Automatic transmission control system, engine oil pressure / temperature sensor, heated rear seats, navigation system, rear window sunshade drive, telephone / telematics 10
6 Air conditioning system 5
7 Anti-Lock Braking System, Stop Light Switch (Brake Pedal Position Sensor), Clutch Pedal Limit Switch (Position Sensor) 10
8 Telephone/telematics 5
9 Brake booster vacuum pump (if equipped) 10
10 Headlights corrector 10
11 Automatic transmission - 2001 10
12 Diagnostic connector 10
13 Steering column electrical control unit 10
14 Stop lights 10
15 Instrument cluster, navigation system 10
16 Garage Door Remote Control System 5
17 parking system 10
18 empty -
19 Fog lights, fog lights 15
20 Right headlight - dipped beam, headlight range control 15
21 Left headlight - low beam, headlight range control 15
22 Door function control unit (left front), door function control unit (left rear)(—2001) 15
23 Door function control unit (front right), door function control unit (rear right) (—>2001) 15
24 Multifunctional control unit 2-optional equipment 20/30
25 Air conditioner/heater fan motor 30
26 Rear window heater 30
27  Trailer control unit 30
28
  • Fuel pump fuse
  • booster fuel pump (diesel)
20
29  Engine Management System - Gasoline 20
30 Sunroof 20
31 Auto-dimming interior rear-view mirror, automatic transmission control system, diagnostic socket, engine management system, reversing lights 15
32 Engine Management System - Gasoline 20
33 Audi A4 cigarette lighter fuse 15
34 Engine Management System - Gasoline 15
35  Connector for additional equipment 30
36 Multifunction control unit 1, windshield wiper/washer 30
37 Multifunction control unit 1, headlight washers 20/25
38 Anti-theft system, tailgate/tailgate opener, multifunctional control unit 2-accessory 15/30
39 Audio system, navigation system 20/30
40 Sound signal 25
41 Additional heater (2003^) 30
42 Anti-lock braking system, Stability Program 25
43 Engine Management System - Gasoline 15
44 Seat heaters, steering wheel heater 30

Location of relay blocks in the passenger compartment.
The relay boxes are located behind the dashboard front trim on the driver's side.

Description of fuses and relays in relay blocks A4 B6
Block #1

General form.

diagram.
No. Purpose A
F1 Electric rear window blind 10
F2 10
F3 Not used 3
F4 Rear power windows 30
F5 Power seats 10
F6 Front power windows 30
F7 Trailer towing module 30
1 Fuel pump relay -
2 Power steering -
3 signal relay -
4 Vacuum pump for brake booster -
5 Not used -
6 Auxiliary ignition circuits -
7 Not used -
8 -
9 -
Block #2
No. Protected circuits A
A Additional heater 30
C Coolant heater 40
B 60
1 empty
2 Coolant Heater Relay 2 - High Power
3 Coolant Heater Relay 1 - Low Power
Block #3
No. Purpose A
A Not used -
B -
C -
D -
E Relay for turning on the fan of the cooling system 40
F Optional equipment 10
G Cooling fan (also used 60A) 40
H ABS control unit 50
1 Not used -
2 -
3 -
4 Taxi alarm control unit 3 -
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