Table of Contents
The Audi TT is a compact sports coupé produced by the German automaker Audi. Manufactured in Győr, Hungary, since 1998, the third-generation model (8S / FV) spans the 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, and 2022 model years. This article provides a comprehensive guide to its fuse box diagrams, relay locations, and circuit allocations.
Below you will find the layout diagrams and photographs for each power distribution box. The fuse designated for the 12V power socket / cigarette lighter is highlighted separately.
In the Engine Compartment
The fuse box is located on the right-hand side of the engine compartment, beneath a protective cover.
General view.
| Diagram | |
|---|---|
|
|
| No. | Description |
| F1 | ESC control module |
| F2 | |
| F3 | Engine Control Module (ECM) |
| F4 | Engine cooling system; |
| Auxiliary heater relay coil (1 + 2); | |
| Secondary air injection (AIR) pump relay. | |
| F5 | Engine components, EVAP / fuel tank system |
| F6 | Brake light switch |
| F7 | Engine components |
| F8 | Oxygen sensor (O2 sensor) |
| F9 | 2014–2018: Engine components; Exhaust system; Glow plug control module; |
| 2019–2022: Exhaust system; Engine components; | |
| F10 | Fuel pump control module; Fuel injectors; |
| F11 | 2016–2018: Auxiliary heater 2; |
| 2019–2022: Empty | |
| F12 | 2016–2018: Auxiliary heater 3 |
| 2019–2022: Empty | |
| F13 | 2014–2018: Transmission Control Module (TCM); |
| 2019–2022: Auxiliary transmission fluid pump. | |
| F14 | 2014–2017: Empty |
| 2018–2022: Ignition coils (5-cylinder engine). | |
| F15 | Horn |
| F16 | Ignition coils |
| F17 | 2014–2018: Engine Control Module (ECM); ESC control module; |
| 2019–2022: Exhaust flap actuator | |
| F18 | 2014–2018: Terminal 30 power supply |
| 2019–2022: Garage door opener antenna; Battery monitoring control unit; Data bus diagnostic interface; | |
| F19 | Windshield wipers |
| F20 | 2014–2018: Horn |
| 2019–2022: Anti-theft alarm horn | |
| F21 | 2014–2018: Empty |
| 2019–2022: Transmission Control Module (TCM). | |
| F22 | Terminal 50 diagnostic circuit |
| F23 | Starter motor |
| F24 | Auxiliary heater 1 |
| F31 | 2014–2017: Empty |
| 2018–2022: Engine components (5-cylinder engine). | |
| F32 | 2014–2018: LED headlights; |
| F33 | 2018: Auxiliary transmission fluid pump; |
In the Passenger Compartment
The fuse box is located behind the dashboard cover panel on the driver's side.
General view.
| Diagram | |
|---|---|
|
|
| No. | Description |
| F1 | 2014–2018: Convertible soft top control module (Roadster); |
| 2019–2022: Empty | |
| F2 | 2014–2018: Convertible soft top control module (Roadster); |
| 2019–2022: Empty | |
| F3 | 2014–2018: ESC control module; |
| 2019–2022: Empty | |
| F4 | Central electronics control module (BCM) |
| F5 | Data bus diagnostic interface (Gateway) |
| F6 | 2014–2017: Anti-theft alarm system |
| 2018–2022: Automatic transmission selector lever. | |
| F7 | 2014–2017: Automatic transmission selector lever, climate control system, Park Assist, heated rear window |
| Heated rear window relay coil; | |
| 2018–2022: Climate control system, heated rear window, tire pressure monitoring system (TPMS) | |
| F8 | 2014–2017: Diagnostic connector, electromechanical parking brake switch; rain and light sensor, interior lighting |
| 2018–2022: Electromechanical parking brake switch; rain and light sensor, interior lighting, diagnostic connector | |
| F9 | Steering column switch electronics module |
| F10 | 2014–2018: Instrument cluster display |
| 2019–2022: Vehicle positioning / tracking control module. | |
| F11 | 2014–2018: Haldex all-wheel drive coupling; |
| 2019–2022: All-wheel drive control unit; Left onboard electrical system control module | |
| F12 | Multi Media Interface (MMI) components |
| F13 | 2014–2018: Adaptive damping control module (magnetic ride); |
| 2019–2022: Empty | |
| F14 | Climate control blower motor |
| F15 | Electronic steering column lock (ELV) |
| F16 | MMI system components; |
| Seat belt microphone (Roadster). | |
| F17 | Instrument cluster |
| F18 | Rearview camera |
| F19 | Keyless access control module |
| F20 | Power lumbar support adjustment |
| F22 | Passenger side neck-level heating (Roadster) |
| F23 | 2014–2017: Right exterior lighting; Right onboard electrical system control module; |
| 2018–2019: Empty | |
| F24 | 2014–2017: Empty |
| 2018–2019: Right onboard electrical system control module. | |
| F25 | Driver side door electronics (e.g., power windows) |
| F26 | Seat heating control module |
| F27 | 2014–2017: Empty |
| 2018–2022: Onboard electrical system control module; Audi Music Interface (AMI) High media port | |
| F29 | 2014–2017: Onboard electrical system control module; |
| 2018–2022: Onboard electrical system control module. | |
| F31 | 2014–2017: Left onboard electrical system control module; |
| 2018: Left onboard electrical system control module; | |
| 2019–2022: Empty | |
| F32 | Driver assistance systems control module |
| F33 | Airbag system (SRS) |
| F34 | 2014–2018: Relay carrier; Audio system, reverse light switch, oil level and temperature sensor |
| 2019–2022: 12V power sockets, interior sound system; Reverse light switch; Oil temperature sensor; Oil level sensor; Neck-level seat heating, garage door opener. | |
| F35 | 2014–2018: Headlight range control; Diagnostic connector; Air quality sensor; Auto-dimming interior mirror; |
| Headlight range control system module; | |
| 2019–2022: Headlight range control; Air quality sensor; Auto-dimming interior mirror; Center instrument panel switch module, diagnostic connector | |
| F36 | Right turn signal / Right LED headlight module |
| F37 | Left turn signal / Left LED headlight module |
| F38 | Engine Control Module (ECM), ESC control module |
| F39 | Front passenger door electronics (e.g., power windows) |
| F40 | Audi TT cigarette lighter fuse, 12V sockets |
| F41 | 2014–2018: Selective Catalytic Reduction (SCR) relay |
| 2019–2022: Fuel tank diagnostic system. | |
| F42 | Central locking system |
| F43 | 2014–2018: Onboard electrical system control module |
| 2019–2022: Empty | |
| F44 | 2014–2017: Empty |
| 2018–2019: AWD clutch control module. | |
| F45 | Power driver seat adjustment |
| F46 | Driver side neck-level heating (Roadster) |
| F49 | Starter motor relay, clutch position sensor |
| F50 | 2014–2017: ESC hydraulic unit valves; |
| 2018–2019: Empty | |
| F52 | 2014–2018: Empty |
| 2019–2022: Adaptive suspension control module. | |
| F53 | Heated rear window |
