Audi TT MK1 (8N) fuses and relays
Location, assignment and detailed diagrams of all fuses and relays in the vehicle.
Fuse holder
Fuse holder on the left of the dashboard
Colours of fuses:
- Green: 30 amps
- White: 25 amps
- Yellow: 20 amps
- Blue: 15 amps
- Red: 10 amps
- Brown: 7.5 amps
- Beige: 5 amps
| N° | Amperage | Component / Function | |
|---|---|---|---|
| 1 | 10 | Z4 - De-icing exterior mirror, driver's side Z5 - Heated exterior mirror, front passenger side Z20 - Left windscreen washer jet heater Z21 - Right windscreen washer jet heater |
|
| 2 | 10 | E3 - Control of hazard lights | |
| 3 | 5 | W6 - Glove box lighting J5 - Fog light relay E87 - Air conditioner control and display unit, Climatronic |
|
| 4 | 5 | X4 - Left number plate light X5 - Right number plate light |
|
| 5 | 7,5 | E159 - Control of fresh air and recycled air flaps J151 - Coolant circulation relay after engine shutdown J123 - Front bulb monitoring unit F47 - Brake pedal switch |
|
| 6 | 5 | J429 - Central locking control unit | |
| 7 | 10 | T16 - Diagnostic coupling F4 - Reversing light switch E3 - Control of hazard lights G22 - Vehicle speed sensor |
|
| 8 | 5 | J412 - Mobile telephone control unit | |
| 9 | 5 | J104 - ABS control unit | |
| 10 | 10 | until October 2001 J220 - Motronic engine control unit J271 - Motronic system power relays 15-amp fuse from model year 2001 (May 2000) |
|
| 10 | 10 | from November 2001 Contact S J429 - Central locking control unit J285 - Instrument cluster control unit |
|
| 11 | 5 | J285 - Instrument cluster control unit G266 - Oil level and temperature transmitter |
|
| 12 | 7,5 | T16 - Diagnostic coupling J412 - Mobile telephone control unit R86 - Mobile phone amplifier |
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| 13 | 10 | F - Stop light switch | |
| 14 | 10 | J429 - Central locking control unit M27 - Left door open warning light M28 - Right door open warning light E183 - Disabling the passenger compartment monitoring device E150 - Internal locking control, driver side E188 - Remote tailgate/boot lid release switch |
|
| 15 | 5 | J285 - Instrument cluster control unit J217 - Automatic gearbox control unit |
|
| 16 | 10 | J293 - Coolant fan control unit | |
| 17 | Unused | ||
| 18 | 10 | M32 - Right main beam bulb J5 - Fog light relay J285 - Instrument cluster control unit |
|
| 19 | 10 | M30 - Left main beam bulb | |
| 20 | 15 | V49 - Right headlight range adjustment motor E102 - Headlight range adjustment wheel V48 - Left headlight range adjustment motor J123 - Front bulb monitoring unit |
|
| 21 | 15 | J123 - Front bulb monitoring unit | |
| 22 | 5 | J123 - Front bulb monitoring unit M3 - Right sidelight bulb J285 - Instrument cluster control unit |
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| 23 | 5 | J123 - Front bulb monitoring unit M1 - Left sidelight bulb J285 - Instrument cluster control unit |
|
| 24 | 20 | J31 - Wash/sweep relay with intermittent operation E22 - Control of intermittent operation of the wiper |
|
| 25 | 25 | E87 - Air conditioner control and display unit, Climatronic J9 - Heated rear window relay V2 - Fresh air blower J126 - Fresh air blower control unit |
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| 26 | 25 | E15 - Heated rear window switch | |
| 27 | 30 | J531 - Cabriolet wind deflector control unit E278 - Cabriolet wind deflector switch |
|
| 28 | 20 | G6 - Fuel pump (pre-feed pump) | |
| 29 | 15 | J220 - Motronic engine control unit | |
| 30 | Unused | ||
| 31 | 5 20 |
J492 - All-wheel drive control unit J217 - Automatic gearbox control unit |
|
| 32 | 10 | N30, N31, N32, N33 - Injectors | |
| 33 | 20 | J31 - Wash/sweep relay with intermittent operation 30-amp fuse from model year 2005 (May 2004) |
|
| 34 | 10 | N75 - Boost pressure control solenoid valve N205 - Variable valve timing solenoid valve 1 N249 - Turbocharger air recirculation valve |
|
| 35 | Unused | ||
| 36 | 15 | E23 - Front and rear fog light switch | |
| 37 | 10 | until October 2001 Contact S J429 - Central locking control unit J285 - Instrument cluster control unit |
|
| 37 | 20 | from November 2001 J220 -Motronic engine control unit J271 - Motronic system power relays |
|
| 38 | 15 | J429 - Central locking control unit H8 - Sound alarm for anti-theft alarm device |
|
| 39 | 15 | E3 - Control of hazard lights | |
| 40 | 20 | J4 - Dual-tone horn relay | |
| 41 | 15 | U1 - Cigar lighter | |
| 42 | 20 | R - Car radio R12 - Amplifier |
|
| 43 | 10 | N80 - Activated carbon tank solenoid valve 1 N112 - Secondary air injection valve J299 - Secondary air pump relay G70 - Mass air flow meter G235 - Exhaust gas temperature transmitter 1 Fuse in 15 amps on the 250 hp |
|
| 44 | 15 | E94 - Driver seat heating controller E95 - Front passenger seat heating control |
|
| The electric windows are protected by automatic circuit breakers that reset after a few seconds once the overload has been removed (for example, windows blocked by frost). | |||
Relay holder with 13 connections
13-position relay carrier above the auxiliary fuse and relay carrier
| Number | Component / Function |
|---|---|
| 1 | available |
| 2 | J123 - Front bulb monitoring unit |
| 3 | J123 - Front bulb monitoring unit |
| 4 | J5 - Fog light relay |
| 5 | J207 - Starter inhibitor relay |
| 6 | available |
| 7 | Until May 2002 J508 - Stop light neutralization relay |
| 7 | From May 2002 (model year 2003) available |
| 8 | available |
| 9 | available |
| 10 | J9 - Heated rear window relay |
| 11 | J207 - Starter inhibitor relay |
| 12 | J531 - Cabriolet wind deflector control unit |
| 13 | J151 - Coolant circulation relay after engine shutdown J219 - Relay for reversing light |
| 14 | available |
| 15 | available |
| 16 | available |
| 17 | available |
| 18 | Until May 1999 (model year 2000) S187 - Differential blocking fuse (Haldex coupler) |
| 18 | From May 1999 (model year 2000) available |
Auxiliary fuse and relay carrier
Auxiliary fuse and relay carrier under the left storage compartment
| Number | Component / Function |
|---|---|
| 1 | J4 - Dual-tone horn relay |
| 2 | J59 - X-contact load reduction relay |
| 3 | available |
| 4 | J17 - Fuel pump relays |
| 5 | J31 - Automatic washing/sweep relay with intermittent operation |
| 6 | J31 - Automatic washing/sweep relay with intermittent operation |
| A | S67 - Soft top opening/closing fuse |
| B | S279 - Fuse in the hydraulic pump relay |
| C | S43 - Electric window thermal fuse |
Main fuse housing
Main fuse box on the battery
| Number | Component / Function |
|---|---|
| 1 | S138 - Thermofuse 5: Alternator |
| 2 | S134 - Thermofuse 4: Relay box in the passenger compartment |
| 3 | S164 - Fuse 3 (30): Coolant radiator fans |
| 4 | S163 - Fuse 2 (30): ABS valves |
| 5 | S162 - Fuse 1 (30): ABS pump |
| 6 | S133 - Thermofuse 3: Coolant radiator fans |
| 7 | S132 - Thermofuse 2: Engine control module |
| 8 | S131 - Thermofuse 1: Secondary air injection pump |
Relay protection box
Relay protection box in the engine compartment
| Number | Component / Function |
|---|---|
| 1 | J299 - Secondary air pump relay |
| 2 | J271 - Motronic system power relays |
| 3 | S279 - Fuse in the hydraulic pump relay |
| 4 | S130 - Secondary air pump fuse |
| 5 | available |
| 6 | available |
| 7 | S113 - Automatic gearbox control unit fuse |
| 8 | available |
| 9 | available |