2018 Seat León 5F Fuse Box Diagram
The 2018 Seat León (5F) has 2 fuse boxes. Choose the one you’re looking at.
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Dash panel fuse box (fuse holder C)
The holder is behind the fold-down cover at the driver's end of the dash panel, or in the glove box on right-hand-drive cars; take the cover off from its lower edge and the puller sits in a clip inside. This is the year the 5F's fuse numbers were shuffled: the 05.2017 handbook moved the left headlight feed from 31 to 11, the right headlight from 23 to 24, the sunroof onto 23, the interior lighting from 43 to 27 and the driving-mode selector from 13 to 52, and the 11.2017 edition put the SEAT Sound amplifier on 43.
The plate itself did not change. Its top row holds 1 on end at the far left, three relays and 2 on end at the far right. Under them the positions run in left-to-right rows: 3 beside 4 to 10 and 11 to 14; 15 to 21 beside 22; 23, then 24 to 28, then 29 over 30, then 31; 32 to 37 with 38, 39, 40 a step lower, 41 and 42; 43, 44, the tall 45 and 46 to 48; and finally 49, 50, 51 and 52 with 53 alone on the right-hand lobe over the two relays.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | 3 AMINI | Taxi preparation | |
| 5 | 5 AMINI | Data bus diagnostic interface (gateway) | |
| 6 | 5 AMINI | Automatic gearbox selector lever | |
| 7 | 10 AMINI | Air conditioning and heater control panel, heated rear window | |
| 8 | 10 AMINI | Diagnostic connector, handbrake switch, light switch, reversing light, interior lighting, lit door sill | |
| 9 | 5 AMINI | Steering column electronics | |
| 10 | 7.5 AMINI | Radio display | |
| 11 | 40 AATO | Left headlight (this feed sat on position 31 until the 05.2017 edition) | |
| 12 | 20 AATO | Radio | |
| 13 | Not used | ||
| 14 | 40 AATO | Fresh air blower for the air conditioning (30 A up to the 05.2016 edition) | |
| 15 | 10 AMINI | Keyless entry and start (KESSY) | |
| 16 | 7.5 AMINI | Connectivity Box | |
| 17 | 7.5 AMINI | Instrument cluster (5 A up to the 05.2017 edition) | |
| 18 | 7.5 AMINI | Rear view camera | |
| 19 | 7.5 AMINI | Keyless entry and start (KESSY), second feed | |
| 20 | Not used | ||
| 21 | 15 AMINI | Haldex all-wheel drive control unit (4Drive) | |
| 22 | 15 AATO | Trailer preparation | |
| 23 | 30 AJCASE | Electric sunroof (the right headlight feed sat here until the 05.2017 edition) | |
| 24 | 40 AATO | Right headlight (the sunroof sat here until the 05.2017 edition) | |
| 25 | 30 AATO | Driver's door control unit and the rear window regulator behind it | |
| 26 | 20 AATO | Front seat heating | |
| 27 | 30 AATO | Interior lighting (moved here from position 43) | |
| 28 | 25 AATO | Trailer preparation | |
| 29 | Not used | ||
| 30 | Not used | ||
| 31 | Not used | ||
| 32 | 7.5 AMINI | Control unit for the parking aid, front camera and radar sensor | |
| 33 | 5 AMINI | Airbag control unit and the passenger airbag warning lamp | |
| 34 | 7.5 AMINI | Reversing light switch, climate sensor, auto-dimming mirror, rear USB sockets | |
| 35 | 10 AMINI | Diagnostic connector, headlight range control unit and its two adjuster motors | |
| 36 | 7.5 AMINI | Right LED headlight (10 A up to the 05.2017 edition) | |
| 37 | 7.5 AMINI | Left LED headlight (10 A up to the 05.2017 edition) | |
| 38 | 25 AATO | Trailer preparation | |
| 39 | 30 AATO | Front passenger's door control unit and the rear window regulator behind it | |
| 40 | 20 AATO | 12 V socket and cigarette lighter | |
| 41 | Not used | ||
| 42 | 40 AATO | Central locking, through the onboard supply control unit | |
| 43 | 30 AJCASE | SEAT Sound / Beats audio amplifier, CAN and MOST feed | |
| 44 | 15 AATO | Trailer preparation | |
| 45 | 15 AATO | Driver's electrically adjustable seat | |
| 46 | Not used | ||
| 47 | 15 AATO | Rear window wiper motor | |
| 48 | Not used | ||
| 49 | 5 AMINI | Clutch position sender and the two starter motor relays | |
| 50 | Not used | ||
| 51 | Not used | ||
| 52 | 15 AMINI | Driving mode selection (moved here from position 13) | |
| 53 | 30 AATO | Heated rear window and its suppression filters |
Engine compartment fuse box (fuse holder B)
You will find this holder on the electronics box at the left-hand end of the engine compartment, under a cover held by two locking tabs. It protects the engine management, the ABS unit, the starter and the auxiliary heater elements. The 11.2017 handbook drops the old 40/20 A rating for position 1 and prints a single 25 A instead — the only change to this box for the 2018 model year.
Column by column the numbers rise from the bottom of the plate towards the top: the left column ends at 3 and starts at 10, the middle column ends at 31 and starts at 38, the right column ends at 15 and starts at 21. Everything else sits around them — the cartridge pair 1 and 2 at the bottom left, 11 and 12 in the middle, 14 low on the right and 24 at the top, the flat 13 beside 14, and 23 above 22 at the top right. Six bolt-down terminals run along the bottom edge; the handbook neither numbers nor rates them.
| No. | Function | Amp | Description |
|---|---|---|---|
| 1 | 25 AJCASE | ABS / ESC control unit, second feed (40/20 A up to the 11.2016 edition) | |
| 2 | 40 AJCASE | ABS / ESC hydraulic control unit (40 A or 60 A according to equipment) | |
| 3 | 15 AATO | Engine control unit: 15 A on petrol engines, 30 A on diesels | |
| 4 | 5 AATO | Engine sensors: oil level and temperature sender, radiator fan control unit and engine valves (5 A or 10 A by engine) | |
| 5 | 7.5 AATO | Engine sensors; gas shut-off valve relay and injectors on the 1.4 TGI (7.5 A or 10 A by engine) | |
| 6 | 5 AATO | Brake pedal position sender | |
| 7 | 5 AATO | Engine power supply: coolant valves and the charge air cooling pump (5 A or 10 A by engine) | |
| 8 | 10 AATO | Lambda probe heaters (10 A or 15 A by engine) | |
| 9 | 5 AATO | Engine: ignition coils on petrol engines, glow period control unit and air mass meter on diesels (5, 10 or 20 A) | |
| 10 | 10 AATO | Fuel pump control unit (10, 15 or 20 A by engine) | |
| 11 | 40 AJCASE | Auxiliary heater element (PTC), circuit 2 | |
| 12 | 40 AJCASE | Auxiliary heater element (PTC), circuit 3 | |
| 13 | 15 AATO | Mechatronic unit of the DSG dual-clutch gearbox (15 A on 0D9, 30 A on 0CW) | |
| 14 | Not used | ||
| 15 | 15 AATO | Treble and bass tone horns and the horn relay | |
| 16 | 5 AATO | Oil level sender and gas shut-off valves on the 1.4 TGI; ignition coils on the 1.8/2.0 TSI (5, 15 or 20 A) | |
| 17 | 7.5 AATO | Main relay, engine control unit and ABS control unit | |
| 18 | 5 AATO | Terminal 30 reference voltage, battery monitor control unit | |
| 19 | 30 AATO | Windscreen wiper motor control unit | |
| 20 | 10 AATO | Anti-theft alarm horn | |
| 21 | Not used | ||
| 22 | 5 AATO | Engine control unit, terminal 50 | |
| 23 | 30 AATO | Starter motor | |
| 24 | 40 AJCASE | Auxiliary heater element (PTC), circuit 1 | |
| 31 | 15 AATO | Electronic front differential lock of the Cupra | |
| 32 | Not used | ||
| 33 | 30 AATO | Automatic gearbox oil pump | |
| 34 | Not used | ||
| 35 | Not used | ||
| 36 | Not used | ||
| 37 | Not used | ||
| 38 | Not used |