Audi A1 8X (2010-2018) – fuse and relay box
Diagrams of fuse boxes and relays – Audi A1 8X
Applies to vehicles manufactured in the years:
2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018.
For the lighter in the Audi A1 8X are fuses number 3 (ST1 panel – black)  in the passenger compartment (left column).
Locations
- D fuse holder -SD-;
- Fuse holder A -SA-;
- Fuse box C -SC-;
- Relay / fuse holder F -SF-;
- Fuse holder B -SB-, fuse holder H -SH-;
- Fuse holder B -SB-.
Fuse box – No. 1
Description
ST1 panel (black)
| 1 | 7.5 | El. Control unit steering column lock -J764- |
| 2 | 20 | Trailer detection control unit -J345- |
| 3 | 20 | Trailer detection control unit -J345- |
| 4 | 30 7.5 |
Mechatronic unit for double clutch gearbox -J743-, up to October 2014;
Electronic damping control unit -J250-, from January 2014. |
| 5 | 30 | Headlight washer relay -J39-;
Headlight washer pump -V11-. |
| 6 | 5 | Vehicle location system interface control unit -J843- |
| 7 | 7.5 | Input and commissioning monitoring system control unit -J518- |
| 8 | 15 | Mechatronic for dual clutch gearbox -J743-, up to October 2014 |
| 9 | 20 | Sliding sunroof motor -V1- |
| 10 | 7.5 | Gear lever sensor control unit -J587- |
| 11 | 15 | Engine electronics voltage supply relay -J757-, up to October 2014;
Fuel pressure regulating valve -N276-, up to October 2014 |
| 12 | – | Not used |
ST2 panel (brown)
| 1 | 5 | Light switch -F4-;
Sender toggle switch control unit -J587-; Mechatronics for gear double clutch -J743-. |
| 2 | 10 | High pressure sensor -G65-;
Engine oil level and temperature sensor -G266-; Air conditioning control unit -J301-; Socket relay -J807-; Rearview mirror with auto dimming function -Y7-; 16-pin connector -T16-, diagnostic connector. |
| 3 | 5 | Data bus diagnostic interface -J533- |
| 4 | 5 | Heater control unit -J65-;
Material noise control unit -J869-. |
| 5 | 7.5 | Light switch -E1-;
Starter relay 1 -J906-; Voltage stabilizer -J532-; Starter relay 2 -J907-; Interior mirror relay with auto dimming -J910-; Left front headlight -MX1-; Right front headlight -MX2-. |
| 6 | 5 | Light switch -E1- |
| 7 | 5 | ABS controller -J104-, up to October 2014; Voltage stabilizer 2 -J570-, up to October 2014; Electronic damping control -J250-, from January 2014. |
| 8 | 5 | Heated driver’s seat, heated – control -E94-;
Heated front passenger seat – control -E95-; Hazard warning light -E229-; Heated rear window -E230-; ASR and ESP button -E256-; Parking aid -E266-; Tire pressure indicator -E492 -; Start / stop button -E693-; Trailer detection control unit -J345-; Left injector heating resistor -Z20-; Right injector heating resistor -Z21-. |
| 9 | 5 | Power steering unit -J500- |
| 10 | 5 7.5 |
Air mass meter -G70-;
Fuel pump control unit -J538-; Heater resistor for crankcase ventilation -N79-. |
| 11 | 5 | Airbag control unit -J234-
Passenger airbag deactivation warning lamp -K145- |
| 12 | 5 | Parking aid control unit -J446- |
| 13 | 5 | Headlight range control unit -J431- |
| 14 | 30 | Seat heating control unit -J882- |
| 15 | 15 | Rear wiper motor -V12- |
| 16 | 5 | Engine control unit -J623-; Air mass meter -G70-. |
ST3 panel (red)
- Not used
- Not used
- 5-10A – Four-wheel drive control unit -J492-, gradual retraction
- Not used
- Not used
- Not used
- Not used
- Not used
- Not used
- 5-10A – Vehicle special control unit -J608-
- Not used
- Not used
Fuse box – No. 2
The box is located on the positive battery terminal  (only for  vehicles  with a battery in the luggage compartment)  .
Description
- Not used;
- On-board power supply / Power supply for engine components;
- Not used;
- Battery cut-off igniter -N253-.
Fuse box – No. 3
| 1 | 30 | Digital sound system control unit -J525-; Voltage stabilizer -J532-; Radio -R-. |
| 2 | 40 | Heater control unit -J65-; Overflow relay contact X -J59-; Supply fan control unit -J126-;Supply air fan -V2-. |
| 3 | 20 | Lighter –Â U1-;
12 V socket -U5-. |
| 4 | 15 | Trailer detection control unit -J345- |
| 5 | 5 | Data bus diagnostic interface -J533- |
| 6 | 30 | Front passenger door, control unit -J387-;
Rear right door, control unit -J389-. |
| 7 | 30 | Driver’s door, control unit -J386-;
Rear left door, control unit -J388- |
| 8 | 30 | Heated rear window relay -J9-; Heated rear window -Z1-. |
| 9 | 25 | ABS control unit -J104- |
| 10 | 20 | Onboard supply control unit -J519- |
| 11 | 15 | High frequency horn -H2-;
Low frequency horn -H7-; Horn relay -J413-. |
| 12 | 30 | Onboard supply control unit -J519- |
ST2 panel (brown)
| 1 | 5 | Anti-theft alarm horn -H12-;
Anti-theft alarm transmitter -G578-. |
| 2 | 5 5 7.5 |
Terminal 30 voltage supply relay -J317-Â Â (Â Â 22); Motronic power supply relay -J271-Â (21); Engine control unit -J623-. |
| 3 | 5 | Onboard supply control unit -J519- |
| 4 | 5
15 |
ABS control unit -J104-;
Voltage stabilizer 2 -J570-; Four-wheel drive control unit -J492-. |
| 5 | – | Not used |
| 6 | bake | Rain and light sensor -G397-; Cell phone amplifier -R86-; Phone holder -R126-; Front roof module -WX3-. |
| 7 | 15 20 |
Fuel pump control unit -J538-;
Fuel pump relay -J17-Â Â (Â Â 22). |
| 8 | 10 | Additional coolant pump relay -J496-, up to October 2014 |
| 9 | 5 | Steering column control unit -J527- |
| 10 | 5 | Light switch -E1- |
| 11 | 10 | Climatronic -J255-;
Air conditioning control unit -J301-; Front passenger door control unit -J387- (up to April 2012); Rear right door -J389- (up to April 2012); 16-pin connector – T16-, diagnostic connector. |
| 12 | 10 | Driver door control unit -J386- (up to April 2012);
Rear left door control unit -J388- (up to April 2012). |
| 13 | 10 | Onboard supply control unit -J519- |
| 14 | 20 | Socket relay -J807- Only for vehicles without hitch socket |
| 15 | 30 | Onboard supply control unit -J519- |
| 16 | 20 | Change-over relay 1 for wiper motor -J368-, up to October 2014; Relay for supplying engine components -J757-; Ignition coils 1 with output stage -N70-. |
Relay holder – No. 4
Description
- 40A Voltage stabilizer -J532-
- 50A Power supply for fuse holder 1 -ST1- on fuse holder D -SD-
- 40A Terminal 15 voltage supply relay -J329-
- 40A ABS control unit -J104-
- 5A Voltage stabilizer 2 -J570-, stepped output power
- 5A Onboard supply control unit -J519-, voltage stabilizer -J532-
- 16 10A – Brake light switch -F- (from November 2011 to October 2014) / clutch pedal position sender -G476- (from November 2011 to October 2014)
- 17 5A – Lambda probe heater -Z19- (from November 2011 to October 2014)
Fuse box – No. 5
Description
- 175A – Generator -C-
- 40A – Low heat output relay -J359- / Auxiliary air heater -Z35-
- 110A – Power supply of the on-board network / Power supply of engine components
- 80A – Power steering controller -J500-
- 50A / 40A – Coolant blower thermal switch -F18- / Radiator blower controller -J293-
- 50A – Glow plug control unit -J179-
- 60A – High heat output relay -J360- / Battery monitor control unit
Fuse box – No. 6
Description
| 1 | 110 / 50A Power supply for electric installation, power supply for engine components, radiator fan controller -J293;
Radiator fan -V7-. |
| 2 | 250A Alternator -C-;
Voltage regulator -C1-. |
| 3 | Battery + |
| 4 | 80A Power steering control unit -J500- |
| 5 | 50A Glow plug controller -J179-;
Glow plug 1 -Q10-; Glow plug 2 -Q11-; 3 Glow plug -Q12-; Glow plug 4 -Q13-. |
| 6 | 50A Radiator fan controller -J293-;
Radiator fan -V7-. |
| 125A Power supply for the on-board network, power supply for engine components |