The Audi A3 of the second series (designation 8P) was produced in 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013. The sports versions were marked as S3. In our article you will find all the information about fuses and relays for the Audi A3 8P.
In this model, there are 4 main fuse blocks:
- Relay block under the hood Audi A3 8p;
- Central fuse box under the hood;
- Fuse box in the Audi A3 cabin;
- Fuse block on the battery.
Relay block under the hood
This element is typical for Audi A3 with diesel engines and is located in the water drain box switching unit.
Appointment
- Reserve;
- Glow plug control relay;
- Reserve;
- Reserve;
- Air supply relay release;
- Coolant pump relay.
Central fuse box under the hood
The first version of the scheme
The decoding of fuse and relay blocks does not coincide with all Audi A3 and depends on the year of manufacture and your equipment. Check the current description according to the diagrams on the stickers on the back of the cover.
Detailed description of the scheme
Option #1
| 1 | Main ignition circuit relay |
| 2 | Coolant pump relay (AXX/B HZ/BMJ/B PY/B UB/BWA) |
| 3 | – |
| 4 | Fuel pump relay (BMJ/BUB) |
| F1 | (30A) Anti-lock braking system (ABS) |
| F2 | (30A) Anti-lock braking system (ABS) |
| F3 | (20A) ^2007: Multifunction control unit 2 |
| F4 | (5A) Multifunction control unit 1 |
| F5 | (15A) Audible signal |
| F6 | (15A) Engine control |
| F7 | – |
| F8 | – |
| F9 | (10A) Engine control |
| F10 | (10A) Engine control |
| F11 | (10A) Engine control |
| F12 | (10A) Engine control |
| F13 | (15A) Transmission control system (automatic transmission) (manual transmission (DSG) |
| F14 | – |
| F15 | (10A) Cooling system pump motor |
| F16 | (5A) Steering column electrical control unit |
| F17 | (5A) Instrument cluster |
| F18 | (30A) Audio system |
| F19 | (15D/25A) Audio system, navigation system |
| F20 | (5A) Navigation system, telephone |
| F21 | – |
| F22 | – |
| F23 | (5A/10A) Motor control |
| F24 | (5A) Diagnostic unit |
| F25 | – |
| F26 | – |
| F27 | (5A) Exhaust system control valve (BHZ) |
| F28 | (25A) Engine control |
| F29 | (5A) Coolant pump relay, exhaust air pump relay |
| F30 | (20A) Auxiliary heater |
| F31 | (30A) Windshield wiper |
| F32 | – |
| F33 | – |
| F34 | – |
| F35 | – |
| F36 | – |
| F37 | – |
| F38 | (10A) Cooling fan motor control unit, engine management system |
| F39 | (5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor |
| F40 | (20A) Engine control |
| F41 | – |
| F42 | (5A) Engine control |
| F43 | (30A) Engine control |
| F44 | – |
| F45 | – |
| F46 | – |
| F47 | (30A/40A) Multifunction control unit 1 |
| F48 | (30A/40A) Multifunction control unit 1 |
| F49 | (40A) ^2007: Instrument panel fuse/relay block, multifunction control unit relay 2 |
| F50 | – |
| F51 | (40A) Engine control |
| F52 | (40A50A) ^2007: Instrument panel fuse/relay block, auxiliary circuit relay, multifunction control unit 1. |
| F53 | (50A) ^2007: Power seats, instrument panel fuse/relay block |
| F54 | – |
Option #2
| 1 | Relay 2 main ignition circuits |
| 2 | Starter relay |
| 3 | Fuel pump relay-1.6(BGU)/3.2(BDB) |
| 4 | Relay 1 of the main ignition circuits |
| F1 | (30A) Anti-lock braking system (ABS) |
| F2 | (30A) Anti-lock braking system (ABS) |
| F3 | (20A) Multifunction control unit2 |
| F4 | (5A) Multifunction control unit 1- except 3,2 (BDB) |
| F5 | (20A) Audible signal |
| F6 | (5A/20A/30A) Engine Management System-Gasoline |
| F7 | (5A) Brake light switch (brake pedal position sensor) |
| F8 | (10A) Cooling fan motor control unit, engine management system |
| F9 | (10A) Engine control |
| F10 | (10A) Engine control |
| F11 | (25A) Engine management system-gasoline |
| F12 | (15A) Engine control |
| F13 | (20A) Automatic transmission |
| F14 | |
| F15 | (40A) Starter |
| F16 | (15A) Steering column electrical control unit |
| F17 | (10A) Instrument cluster |
| F18 | (30A) Audio system |
| F19 | (15A) Audio system, navigation system |
| F20 | (5A) Telephone |
| F21 | (10A) Navigation system |
| F22 | |
| F23 | |
| F24 | (10A) Diagnostic unit, ignition switch |
| F25 | |
| F26 | (5A) Engine Management System – Diesel |
| F27 | (10A) Crankcase ventilation heater |
| F28 | (20A) Automatic transmission |
| F29 | (10A/20A) Motor control |
| F30 | (20A) Auxiliary heater |
| F31 | (25A) Windshield wiper |
| F32 | (10A) Engine control |
| F33 | (15A) Fuel priming pump |
| F34 | – |
| F35 | – |
| F36 | – |
| F37 | – |
| F38 | (10A) Headlight leveler |
| F39 | (5A) Engine oil temperature sensor, instrument cluster |
| F40 | (30A) Fuse/Relay Block 1 Instrument Panel |
| F41 | – |
| F42 | (5A) Engine Management System – Petrol |
| F43 | (20A) Brake booster vacuum pump |
| F44 | Engine Management System – Diesel |
| F45 | (10A/15A) Motor control |
| F46 | (10A) Engine control |
| F47 | (40A) Multifunction control unit 1 |
| F48 | (40A) Multifunction control unit 1 |
| F49 | (30A) Relay 2 of the multifunction control unit |
| F50 | – |
| F51 | (40A) Engine management system-gasoline |
| F52 | (50A) Multifunction control unit 1 |
| F53 | (50A) Fuse/Relay Block 1 Instrument Panel (F32-F37) — except 3.2(BDB) |
| F54 | (50A) Cooling system fan motor control unit |
Option #3
| 1 | Relay 2 main ignition circuits |
| 2 | Starter relay |
| 3 | Fuel pump relay (BDB/BGU/BMJ) |
| 4 | Relay 1 of the main ignition circuits |
| F1 | (30A) Anti-lock braking system (ABS) |
| F2 | (30A) Anti-lock braking system (ABS) |
| F3 | (20A) Multifunction control unit 2 |
| F4 | (5A) Multifunction control unit 1 (except BDB/BMJ) |
| F5 | (20A) Audible signal |
| F6 | (15A/20A/30A) Motor control |
| F7 | (5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor |
| F8 | (10A) Cooling fan motor control unit, engine management system |
| F9 | (10A) Cooling system pump motor (if equipped), engine management system |
| F10 | (10A) Engine control |
| F11 | (25A) Engine management system gasoline) |
| F12 | (15A) Engine control |
| F13 | (20A) Transmission control system (automatic transmission) (manual transmission (DSG) |
| F14 | – |
| F15 | (40A) Starter |
| F16 | (15A) Steering column electrical control unit |
| F17 | (10A) Instrument cluster |
| F18 | (30A) Audio system |
| F19 | (15A) Audio system, navigation system |
| F20 | (5A) Telephone |
| F21 | (10A) Navigation system |
| F22 | – |
| F23 | – |
| F24 | (10A) Diagnostic unit |
| F25 | – |
| F26 | (5A/10A) Motor control |
| F27 | (5A/10A) Crankcase ventilation heater |
| F28 | (20A) Automatic transmission |
| F29 | (10A20A) Engine control |
| F30 | (20A)Additional heater |
| F31 | (30A) Windshield wiper |
| F32 | (10A)Motor control |
| F33 | (15A) Engine control |
| F34 | – |
| F35 | – |
| F36 | – |
| F37 | – |
| F38 | (10A) Headlight leveler |
| F39 | (5A) Engine Oil Temperature Sensor |
| F40 | (20/30A) Instrument panel fuse/relay block 1 (F1-F11/F29-F31) (except BDB/BMJ) |
| F41 | (10A) Engine control |
| F42 | (5AЛ0A) Engine control |
| F43 | (20A) Brake booster vacuum pump (if equipped) |
| F44 | (10A) Engine control |
| F45 | (10A/15A) Motor control |
| F46 | (10A) Engine control |
| F47 | (40A) Multifunction control unit 1 |
| F48 | (40A) Multifunction control unit 1 |
| F49 | (30A) Instrument panel fuse/relay block 1 (F1-F11/F29-F31) – (BDB/BMJ), multifunction control unit relay 2 |
| F50 | – |
| F51 | (40A) Engine control |
| F52 | (50A) Instrument panel fuse/relay block, auxiliary circuit relay, multifunction control unit 1. |
| F53 | (50A) Instrument panel fuse/relay block 1 (F32-F37)-(BDB/BMJ) |
| F54 | (50A) Cooling system fan motor control unit |
The second version of the scheme
Transcript
| 1 | Main ignition circuit relay |
| 2 | Blower Air System (BSE) Pump Relay |
| F1 | (20A) ^2007: Multifunctional control unit2 |
| F2 | (5A) Steering column electrical control unit |
| F3 | (5A) Multifunction control unit 1 |
| F4 | (30A) Anti-lock braking system (ABS) |
| F5 | (15A) Transmission control system (automatic transmission) (manual transmission (DSG) |
| F6 | (5A) Instrument cluster control unit |
| F7 | – |
| F8 | (15D/25A) Audio system, navigation system |
| F9 | (5A) Navigation system, telephone |
| F10 | (5A/10A) Motor control |
| F11 | (20A) Auxiliary heater |
| F12 | (5A) Diagnostic unit |
| F13 | (25A/30A) Engine control |
| F14 | (20A) Engine control |
| F15 | (5A/10A/15A) Motor control |
| F16 | (30A) Anti-lock braking system (ABS) |
| F17 | (15A) Sound signal |
| F18 | (30A) Audio system |
| F19 | (30A) Windshield wiper |
| F20 | (20A) Fuel pressure regulator control valve (BPT/BPU/BYT) |
| F21 | (10A/15A) Engine control |
| F22 | (5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor |
| F23 | (5A/10A/15A) Coolant pump relay, engine management system |
| F24 | (10A) Cooling fan motor control unit (some models), engine management system |
| F25 | (30A/40A) Multifunction control unit 1 |
| F26 | (30A/40A) Multifunction control unit 1 |
| F27 | (40A) Blower Air System Pump (BSE) |
| F28 | (40A) ^2007: Instrument panel fuse/relay block, relay 2, Multifunction control unit |
| F29 | (50A) ^2007: Power seats, instrument panel fuse/relay block |
| F30 | (40A50A) ^2007: Instrument panel fuse/relay block 1, auxiliary circuit relay, multifunction control unit 1. |
Fuse box in the Audi A3 cabin
Located on the left end of the instrument panel behind a protective cover.
diagram of this block with fuses
Description
| F1 | (10A) Diagnostic connector, engine management system, headlight range control, light switch, trailer electrical control unit |
| F2 | (10A) Automatic transmission control system, manual transmission (DSG), ABS system, brake light switch (brake pedal position sensor), diagnostic unit, engine management system, 4WD electronic control unit, power steering |
| F3 | (5A) Airbag |
| F4 | (5A) Engine oil level sensor, remote garage door opener, interior rearview mirror, navigation system, seat heaters, heating/air conditioning system, parking system control unit/control, reversing lights (with manual transmission), TCS/ES system master switch, seat occupant detection control unit, tire pressure monitoring system, windshield washer nozzle heaters |
| F5 | (5A) Xenon headlight control unit (left) |
| F6 | (5A) Xenon headlight control unit (right) |
| F7 | – |
| F8 | – |
| F9 | – |
| F10 | – |
| F11 | – |
| F12 | (10A) Door electrical control unit (driver), door electrical control unit (passenger) |
| F13 | (10A) Door electrical control unit (left rear), door electrical control unit (right rear), multi-function control unit 2 |
| F14 | (10A) Automatic transmission control system, manual transmission (DSG), ABS system (some models), parking system control unit |
| F15 | (10A) Interior lights |
| F16 | (10A) Rain/sunlight sensor, auxiliary heater remote control receiver, heating/air conditioning system diagnostic connector |
| F17 | (5A) Anti-theft system |
| F18 | – |
| F19 | – |
| F20 | – |
| F21 | – |
| F22 | (40) Heater/air conditioner |
| F23 | (30A) Driver’s door window lifter motor |
| F24 | (20A) Cigarette lighter |
| F25 | (30A) Rear window heater |
| F26 | (20A) Charging connector |
| F27 | (15A) Fuel pump control unit (if equipped), fuel pump relay (if equipped), start relay (fuel system) (if equipped) |
| F28 | (30A) Power window motor (rear left), power window motor (rear right) |
| F29 | – |
| F30 | (20A) Automatic transmission |
| F31 | (20A) Brake booster vacuum pump (if equipped) |
| F32 | (30A) Headlight washers |
| F33 | (20A) Hatch |
| F34 | (20A)Seat heater |
| F35 | – |
| F36 | (10A)Electric seat drive |
| F37 | (20A)Air conditioning, seat heaters |
| F38 | (30A) Passenger door power window motor |
| F39 | – |
| F40 | (40) Heater/air conditioner |
| F41 | (15A) Rear window washer |
| F42 | (15A) Windshield/rear window washer pump |
| F43 | (20A) Multifunction control unit 2 |
| F44 | (20A) Trailer electrical control unit |
| F45 | (15A/20A) Trailer electrical control unit |
| F46 | (10A) Trailer electrical connector |
| F47 | (5A) Telephone jack |
| F48 | (10A) Training vehicle |
| F49 | (5A) Service vehicles, training vehicle |
Fuse number 24 at 20A is responsible for the cigarette lighter.
Fuses on the battery
2 execution options are also possible.
Type 1
| F1 | (150A/200A) Generator |
| F2 | (80A) Power steering |
| F3 | (80A) Cooling system fan motor |
| F4 | (80A) Fuse/Relay Block 1 Instrument Panel, Fuse/Relay Block 2 Instrument Panel^2) — BDB |
| F5 | (100A) Auxiliary heater |
| F6 | (50A) Fuse/Relay Block 1 Instrument Panel (F12-F17/F44-F45) -3.2(BDB) |
| F7 | – |
Type 2
| F1 | (150A/200A) Generator |
| F2 | (80A) Power steering |
| F3 | (50A) Cooling system fan motor control unit |
| F4 | (80A) ^10/05 Instrument panel fuse/relay block |
| F5 | (80A) 11/05-07: Dashboard Fuse/Relay Block |
| F6 | – |
| F7 | (50A/80A) Service cars |