Table of Contents
The Audi TT is a compact coupe manufactured by the German automaker Audi. It has been produced since 1998 in Győr, Hungary. In this article, we provide a detailed overview of the fuse diagrams for the second-generation Audi TT (8J), covering the model years 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014.
Below, you will find the locations and photographs of the power distribution boxes. The fuses responsible for the “Cigarette Lighter” and “Fuel Pump” are highlighted in bold.
Engine Compartment
The power distribution box is located on the left side of the engine compartment. To access it, remove the protective cover.
Type 1
The photograph below illustrates an example.
| Engine Compartment Fuse Assignment | ||
|---|---|---|
|
||
| No. | A | Description |
| Black Panel | ||
| 1 | - | |
| 2 | - | |
| 3 | - | |
| 4 | - | |
| 5 | 5 | Anti-theft alarm (sensor), anti-theft alarm (horn) |
| 6 | 30 | Headlight washer system |
| 7 | 15/10 | Electric fuel pump (supply) / Fuel pressure regulation valve |
| 8 | 30 | Windshield wipers |
| 9 | 25 | Heated seats (driver and front passenger) |
| 10 | 10 | Lumbar support (driver and front passenger) |
| 11 | - | |
| 12 | 40 | Radiator cooling fan |
| Brown Panel | ||
| 1 | 15 | Fuel pump (6-cyl.) |
| 2 | 10 | Oxygen sensors (Lambda probes) (6-cyl.) |
| 3 | 5 | Mass Air Flow (MAF) sensor (6-cyl.) |
| 4 | 10 | Oxygen sensors (Lambda probes) (6-cyl.) |
| 5 | 5 | Relay coil, fuel pressure regulation valve relay (4-cyl.) |
| 6 | 10 |
Secondary air injection (SAI) pump valve (6-cyl.), oxygen sensors (Lambda probes) (4-cyl.) |
| 7 | 10 | Engine compartment wiring harness valves |
| 8 | 20/30 | Ignition coils (4-cyl.) / Ignition coils (6-cyl.) |
| 9 | 25 | Engine Control Module (ECM) |
| 10 | 10 | Coolant after-run pump |
| 11 | 5 | Power supply (clutch pedal switch, brake pedal switch) |
| 12 | 10 | EVAP canister purge valve / Boost pressure control valve (4-cyl.) |
Type 2
Access illustration.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Unused | - |
| 2 | Unused | - |
| 3 | Unused | - |
| 4 | Unused | - |
| 5 | Horn; | 5 |
| Anti-theft alarm. | ||
| 6 | Headlight washer pump | 30 |
| 7 | Fuel pressure regulation valve | 20 |
| 8 | Windshield wiper control module | 30 |
| 9 | Heated driver's seat; | 25 |
| Heated front passenger seat. | ||
| 10 | Power seat adjustment (driver); | 10 |
| Power seat adjustment (front passenger). | ||
| 11 | Unused | - |
| 12 | Fresh air blower control module; | 40 |
| 13 | Unused | - |
| 14 | Unused | - |
| 15 | Unused | - |
| 16 | Unused | - |
| 17 | Unused | - |
| 18 | Oxygen sensor (Lambda probe); | 10 |
| 19 | Radiator cooling fan control module; | 10 |
| EVAP leak detection pump. | ||
| 20 | Ignition coils | 20 |
| 21 | Engine Control Module (ECM) | 15 |
| 22 | Auxiliary coolant pump; | 10 |
| 23 | Clutch position sensor | 5 |
| 24 | Power relay; EVAP canister purge regulator valve; | 10 |
| Variable valve timing (VVT) solenoid; | ||
| Turbocharger bypass valve; | ||
| Oil pressure control valve. | ||
| 25–51 | Unused | |
| R1 | Headlight washer relay (if equipped) | |
| R2 | Fuel pump relay | |
| R3 | Auxiliary coolant pump relay | |
| R4 | Secondary air injection (SAI) pump relay | |
| R5 | Motronic engine management power relay | |
| R6 | Main power relay | |
Passenger Compartment
The fuse panel is located on the driver's side of the dashboard, behind a plastic trim cover.
General view of the fuse panel.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | 10 | Engine control relay, fuel pump control module, Engine Control Module (ECM), passenger airbag deactivation indicator, light switch, Data Link Connector (DLC / OBD-II) |
| 2 | 5 | Anti-lock Braking System (ABS), Traction Control (ASR), Electronic Stability Program (ESP), brake light switch |
| 3 | 5 | Adaptive Front-lighting System (AFS) (left) |
| 4 | 5 | Oil level thermal sensor, Tire Pressure Monitoring System (TPMS), ESP switch, AFS control module, A/C refrigerant pressure sensor, reverse light switch |
| 5 | 5/10 | Automatic headlight range control, AFS (right) / Manual headlight range control, halogen headlights |
| 6 | 5 | Data bus diagnostic interface (CAN Gateway), electromechanical power steering, automatic transmission selector lever |
| 7 | 5 | Parking aid, auto-dimming interior rearview mirror, HomeLink garage door opener, heated windshield washer nozzles, windshield washer pump, windshield wiper relay (Roadster) |
| 8 | 5 | Haldex all-wheel drive coupling |
| 9 | 5 | Audi Magnetic Ride control module |
| 10 | 5 | Airbag control module |
| 11 | 5/10 | Mass Air Flow (MAF) sensor, crankcase ventilation heater |
| 12 | 10 | Door control module (driver and front passenger central locking) |
| 13 | 10 | Data Link Connector (DLC / OBD-II) |
| 14 | 5 | Rain sensor, automatic transmission selector lever |
| 15 | 5 | Interior dome light |
| 16 | 10 | Climate control module (HVAC) |
| 17 | 5 | Tire Pressure Monitoring System (TPMS) control module |
| 18 | - | |
| 19 | - | |
| 20 | - | |
| 21 | 10 | Fuel injectors (gasoline engines) |
| 22 | 30 | Power wind deflector (Roadster) |
| 23 | 20 | Horn |
| 24 | 15 | Transmission Control Module (TCM) |
| 25 | 30/20 | Heated rear window (Coupe / Roadster) |
| 26 | 30 | Power window (driver's side) |
| 27 | 30 | Power window (passenger's side) |
| 28 | - | |
| 29 | 15 | Windshield washer pump |
| 30 | 20 | Cigarette lighter |
| 31 | 40 | Starter motor |
| 32 | 5 | Steering column control module |
| 33 | 5 | Instrument cluster |
| 34 | 15 | Radio, navigation system |
| 35 | 30 | Audio amplifier |
| 36 | 10 | Engine Control Module (ECM) |
| 37 | 5 | Data bus diagnostic interface (CAN Gateway) |
| 38 | 20 | 12V power outlet (second cigarette lighter) |
| 39 | - | |
| 40 | - | |
| 41 | - | |
| 42 | - | |
| 43 | - | |
| 44 | - | |
| 45 | - | |
| 46 | - | |
| 47 | 5 | Satellite radio (SDARS) tuner, mobile phone preparation, TV tuner |
| 48 | 5 | VDA interface (mobile phone) |
| 49 | - | |
Additional Relay Blocks
Located adjacent to the main fuse block.
| Diagram | |
|---|---|
| Relay box (Type 1 - from 06/2009) | |
|
|
| 1 | Not documented |
| 2 | |
| 3 | |
| 4 | |
| R1 | Terminal 15 power supply relay |
| R2 | Heated rear window relay |
| R3 | Horn relay |
| R4 | Headlight washer relay |
| R5 | Unused |
| R6 | |
| Relay box (Type 2 - up to 05/2009) | |
|
|
| R1 | Terminal 15 power supply relay |
| R2 | Unused |
| R3 | |
| R4 | Terminal 30 power supply relay |
| R5 | Heated rear window relay |
| R6 | Horn relay |
| R1 | Unused |
| R8 | Headlight washer relay |
| R9 | Unused |
| Additional Fuse Box | |
|
|
| 1 | - |
| 2 | - |
| 3 | Power seat adjustment (driver) (20 A) |
| 4 | - |
| R1 | Unused |
| R2 | Cigarette lighter relay |
| R3 | Control module relay |
| R4 | - |
| R5 | Heater relay |
| R6 | - |
| R1 | Terminal 50 power supply relay |
| R8 | Not documented |
| R9 | Power wind deflector relay (Roadster) |
Luggage Compartment
An additional relay box is located under the right-side trim panel. A power distribution module containing high-current fusible links is located adjacent to the battery.
| Luggage Compartment Relay Block | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Energy management control module | 5 |
| 2 | 40 | |
| 3 | Unused | - |
| 4 | Convertible top hydraulic pump | |
| 5 | Parking aid control module | 5 |
| 6 | Fuel pump control module | 50 |
| 7 | Energy management control module | 40 |
| 8 | Anti-lock Braking System (ABS) control module | 20 |
| 9 | Electronic throttle control module | 30 |
| 10 | Comfort system central control module (CCM); | 10/20 |
| Energy management control module | ||
| 11 | Convertible top control module | 25 |
| 12 | Comfort system central control module (CCM) | 5 |
| 13 | Unused | |
| 14 | Unused | |
| 15 | Unused | |
High-Current Fuses
Located adjacent to the battery.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| FL1 | Alternator | 175 |
| FL2 | Electromechanical power steering control module | 80 |
| FL3 | Radiator cooling fan control module | 60 |
| FL4 | Engine compartment fuse and relay box | 110 |
| FL5 | Secondary air injection (SAI) pump | 40 |
| FL6 | Unused | - |
| FL7 | Unused | - |
| FL8 | Unused | - |