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Fuse box diagram (fuse layout), location and assignment of fuses and relays of Audi A6, S6, RS6, Allroad (C5) (1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005).
Checking and Replacing Fuses
The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of damage caused by electrical problems.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. Replace the fuse as soon as possible.
Note
- Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload.
- If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
Driver side dash panel fuse box
| № | A | Fused function |
|---|---|---|
| 1 | 5 | Heater element, left washer jet |
| Heater element, right washer jet | ||
| 2 | 10 | Hazard warning light switch |
| 3 | 5 | Glove box light |
| 4 | 5 | Number plate light |
| 5 | 10 | Oil level/oil temperature sender |
| Compressor regulating valve, air conditioning system | ||
| High pressure sender | ||
| Tiptronic switch | ||
| Tyre pressure monitor control unit | ||
| Bulb monitoring device | ||
| Mobile phone operating electronics control unit | ||
| Control and display unit for air conditioner/Climatronic | ||
| Air quality sensor | ||
| Navigation system with CD drive control unit | ||
| Self-levelling suspension control unit | ||
| Operating unit to control suspension height | ||
| Telephone/telematics control unit | ||
| Control unit for voice control | ||
| Parking aid control unit | ||
| Rear roller blind switch | ||
| 6 | 5 | Central locking control unit |
| 7 | 10 | ABS control unit |
| Steering angle sender | ||
| TCS/ESP button | ||
| Cruise control system brake pedal switch (diesel direct injection system) | ||
| Clutch pedal switch | ||
| 8 | 5 | Telephone/telematics control unit |
| Control unit for voice control | ||
| 9 | 10 | Heated exterior mirror, driver's side Heated exterior mirror, front passenger's side |
| 10 | 5 | Headlight range control, control unit |
| 11 | 5 | Automatic anti-dazzle interior mirror |
| 12 | 10 | Diagnosis connection |
| 13 | 10 | Brake light switch Brake light bulbs |
| 14 | 10 | Central locking control unit |
| Memory operating unit, driver's seat | ||
| Memory operating unit, front passenger's seat | ||
| Luggage compartment release switch | ||
| Interior monitor switch | ||
| 15 | 10 | Control unit with display in dash panel insert |
| Solar cell isolation relay | ||
| Navigation system with CD drive control unit | ||
| Mirror memory control unit | ||
| Auxiliary heating radio controlled receiver | ||
| 16 | 5 | Steering angle sender |
| 17 | 10 | Tyre pressure monitor control unit |
| Self-levelling suspension control unit | ||
| Two-way radio switch | ||
| Parking aid control unit | ||
| 18 | 10 | Main beam bulb, right |
| Main beam warning lamp | ||
| 19 | 10 | Main beam bulb, left |
| 20 | 15 | Dipped beam bulb, right |
| Headlight range control motor, right | ||
| 21 | 15 | Dipped beam bulb, left |
| Headlight range control motor, left | ||
| 22 | 5 | Side light bulb, right |
| Tail light bulb, right | ||
| 23 | 5 | Side light bulb, left |
| Tail light bulb, left | ||
| 24 | 25 | Automatic intermittent wash/wipe relay |
| Intermittent wiper control | ||
| 25 | 30 | Control and display unit for air conditioner/Climatronic |
| Solar cell isolation relay | ||
| Fresh air blower | ||
| Magnetic coupling relay | ||
| Auxiliary heater relay | ||
| 26 | 30 | Control and display unit for air conditioner/Climatronic |
| Heated rear window switch | ||
| 27 | 15 | Heated steering wheel |
| Rear window wiper motor | ||
| 28 | 20 | Fuel pump (pre-supply pump) |
| Fuel pump control unit | ||
| Fuel pump relay | ||
| 29 | 30 20 | Ignition coil with output stage (engine code BAS) |
| Motronic control unit (engine code BAS) | ||
| Output stage Ignition coil with output stage | ||
| Motronic control unit | ||
| Camshaft timing adjustment valves | ||
| 30 | 20 | Sliding sunroof adjustment control unit |
| 31 | 15 | Starter inhibitor and reversing light relay |
| Hazard warning light switch | ||
| Reversing light switch | ||
| Diagnosis connection | ||
| Multi-function switch | ||
| Ignition cut-off delay relay | ||
| Automatic gearbox control unit | ||
| 32 | 20 | Injectors |
| Cruise control system switch | ||
| 33 | 15 | Cigarette lighter |
| Cigarette lighter, rear | ||
| 34 | 15 | Secondary air pump relay |
| Solenoid valves | ||
| Secondary air inlet valve | ||
| Turbocharger divert air valve | ||
| Air mass meter | ||
| Heater for lambda probes | ||
| Intake manifold change-over valve | ||
| 35 | 30 | Trailer socket |
| 36 | 15 | Front and rear fog light switch |
| 37 | 20 | Radio |
| Amplifier with bass loudspeaker | ||
| Aerial selection control unit | ||
| Operating electronics control unit, navigation | ||
| Navigation/TV tuner | ||
| Navigation interface | ||
| Chip card reader unit | ||
| 38 | 20 | Central locking control unit |
| 39 | 15 | Hazard warning light switch |
| 40 | 25 | Dual tone horn relay |
| 41 | 25 | Relay for ABS solenoid valves (allroad models) |
| 42 | 25 | ABS control unit |
| 43 | 5 | Radio |
| Operating electronics control unit, navigation | ||
| 44 | 30 | Auxiliary heater relay |
| Solar cells isolation relay 2 | ||
| Heated driver's seat regulator | ||
| Heated front passenger's seat regulator | ||
| Heated rear left seat switch with regulator | ||
| Heated rear right seat switch with regulator |
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13-point relay carrier
Located behind the driver’s storage compartment.
| № | Function |
|---|---|
| 1 | Dual tone horn relay (telematics - USA) - J4 |
| 2 | Alternator cut-in relay - J442 |
| Alarm system control unit (taxi) - J85 | |
| Siren relay (police vehicles) - J408 | |
| Alarm system relay, light change-over (special vehicles) - J549 | |
| 3 | Solar cell isolation relay - J309 |
| Alarm system control unit (taxi) - J85 | |
| Siren relay (police vehicles) - J408 | |
| Alarm system relay 2, intermittent main beam (special vehicles) - J461 | |
| 4 | Starter inhibitor relay - J207 |
| Starter inhibitor and reversing light relay - J226 | |
| 5 | Magnetic coupling relay - J44 |
| Auxiliary heater relay - J8 | |
| 6 | Fog light relay - J5 |
| Fuel pump relay (TDI engines) - J17 | |
| 7 | Multi-function steering wheel control unit - J453 |
| 8 | Multi-function steering wheel control unit - J453 |
| 9 | Bulb monitoring device - J123 |
| 10 | Bulb monitoring device - J123 |
| 11 | Exterior mirror fold system control unit - J351 |
| 12 | Exterior mirror fold system control unit - J351 |
| 13 | Servotronic control unit - J236 |
| 14 | Taximeter fuse - S182 |
| Fuse E (police vehicles) - S201 | |
| Hydraulic pump relay fuse (allroad models) - S279 | |
| 15 | Not used |
| 16 | Alarm system fuse (taxi) - S57 |
| Fuse B (police vehicles) - S202 | |
| 17 | Taximeter and alarm system fuse (taxi) - S183 |
| Fuse C (police vehicles) - S203 | |
| Intercom system fuse (special vehicles) - S253 | |
| Fog light fuse (daytime driving lights - Canada) - S28 | |
| 18 | Fitted at any vacant points |
| Alternator cut-in relay - J442 (special vehicles) | |
| Alarm system II control unit - J430 (taxi) | |
| Flasher relay for main beam headlight alarm system - J182 (police vehicles) | |
| Solar cell isolation relay - J309 (taxi) |
Micro-central electrics
Behind the driver’s storage compartment.
| № | Function |
|---|---|
| 1 | Dual tone horn relay - J4 |
| 2 | X contact relief relay - J59 |
| 3 | Low range gearing hydraulic pump relay (allroad models) - J555 |
| 4 | Fuel pump relay (petrol engines) - J17 |
| Relay for glow plugs (diesel engines) - J52 | |
| 5 | Automatic intermittent wash/wipe relay - J31 |
| 6 | Automatic intermittent wash/wipe relay - J31 |
| A | Steering column adjustment fuse - S275 |
| B | Rear roller blind fuse - S100 |
| C | Alarm system 2 fuse (taxi) - S181 |
| Fuse C (police vehicles) - S204 | |
| Fuse for rear lid emergency release (special vehicles) - S195 | |
| Multi-function steering wheel fuse (blue) - S326, phased in from 05.02 onwards |
8-point relay carrier
Located behind the driver’s storage compartment, behind micro-central electrics.
Left-hand drive vehicles
| № | Function |
|---|---|
| 1 | Relay for solenoid valves - ABS with ESP - J106 |
| 2 | Radiator fan 2nd speed relay - J101 |
| 3 | Radiator fan relay - J26 |
| Continued coolant circulation relay - J151 | |
| 4 | Radiator fan run-on relay - J138 |
| 5 | Not used |
| 6 | Self-levelling suspension compressor relay (allroad models) - J403 |
| 7 | Return flow pump relay - ABS with ESP - J105 |
| 8 | Coolant shut-off valve relay - J541 |
| 14 | Seat adjustment thermo-fuse, driver's side (allroad models) - S44 |
| 15 | Fuse for 12 V socket - S184 |
| 16 | Front electric window thermo-fuse - S37 |
| 17 | Rear electric window thermo-fuse - S43 |
| 18 | ABS control unit fuse - S123 |
| 19 | Radiator fan fuse - S42 |
| 20 | Radiator fan control unit fuse - S142 |
| 21 | Seat adjustment thermo-fuse, driver's side - S44 |
| Radiator fan fuse (allroad models) - S42 | |
| 22 | Self-levelling suspension fuse - S110 |
| 24 | Seat adjustment thermo-fuse, front passenger's side - S80 |
Right-hand drive vehicles
| № | Function |
|---|---|
| 2 | Self-levelling suspension compressor relay (allroad models) - J403 |
| 3 | Radiator fan run-on relay - J138 |
| 4 | Relay for solenoid valves - ABS with ESP - J106 |
| 5 | Radiator fan relay - J26 |
| 6 | Return flow pump relay - ABS with ESP - J105 |
| 7 | Radiator fan 2nd speed relay - J101 |
| 8 | Not used |
| 9 | Not used |
| 10 | Not used |
| 11 | Self-levelling suspension fuse - S110 |
| Seat adjustment thermo-fuse, front passenger's side - S80 (RS6 models) | |
| 12 | Seat adjustment thermo-fuse, front passenger's side - S80 |
| Radiator fan fuse - S142 (RS6 models) | |
| 13 | Front electric window thermo-fuse - S37 |
| 14 | Rear electric window thermo-fuse - S43 |
| 15 | Seat adjustment thermo-fuse, driver's side - S44 |
| 16 | Radiator fan fuse - S42 |
| 17 | Radiator fan control unit fuse - S142 |
| Fuse for 12 V socket - S184 (RS6 models) | |
| 18 | ABS control unit fuse - S123 |
| 19 | Fuse for 12 V socket - S184 |
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Relay carrier, driver’s side
Behind the dash panel at the central carrier.
| № | Function |
|---|---|
| 1 | Low heat output relay - J359 |
| Brake servo relay - J569 | |
| 2 | Auxiliary heater relay - J8 |
| Solar cells isolation relay 2 - J354 | |
| 3 | High heat output relay - J360 |
| A | Not used |
| B | Not used |
| C | Additional heater fuse 2 - S143 |
| Hydraulic pump relay fuse (brake servo) - S279 | |
| Fuel pump fuse - S81 (RS6 models; left-hand drive vehicles) | |
| D | Additional heater fuse - S109 |
| Fuel pump fuse - S81 (RS6 models; right-hand drive vehicles) |
3-point relay carrier in electronics box, plenum chamber
| № | Function |
|---|---|
| 1 | Secondary air pump relay - J299 (RS6 models) |
| 1a | Radiator fan relay (allroad models) - J26 |
| 1b | Continued coolant circulation relay (allroad models) - J151 |
| Additional coolant pump relay - J496 | |
| 2 | Secondary air pump relay - J299 |
| 3 | Motronic current supply relay (petrol engines) - J271 |
| Diesel direct injection system relay (diesel engines) - J322 | |
| Ignition cut-off delay relay (automatic gearbox 01J) - J64 | |
| 4 | Fuel cooling pump relay - J445 |
| Continued coolant circulation relay - J151 (RS6 models) | |
| 4a | Not used |
| 5 | Engine control unit fuse - S102 |
| Engine electronics fuse (allroad models) - S282 | |
| 6 | Not used (left-hand drive vehicles) |
| Fuse 2 for glow plugs - engine, V6 TDI, V8 TDI - S125 | |
| Fuse for glow plugs - engine, 4-cylinder - S39 | |
| Radiator fan fuse (allroad models) - S94 | |
| 7 | Fuse for glow plugs - engine, V6 TDI, V8 TDI - S39 |
| Secondary air pump fuse (petrol engines) - S130 | |
| Auxiliary heater fuse - S62 (right-hand drive vehicles) up to model year 2000 | |
| Not used (right-hand drive vehicles) | |
| 8 | Auxiliary heater fuse - S62 (left-hand drive vehicles) up to model year 2000 |
| Not used (left-hand drive vehicles | |
| 9 | Fuse 2 for glow plugs - engine, V6 TDI, V8 TDI - S125 |
| Fuse for glow plugs - engine, 4-cylinder - S39 | |
| Radiator fan fuse (allroad models) - S94 | |
| Coolant pump fuse (RS6 models) - S78 | |
| Not used (right-hand drive vehicles) | |
| 10 | Fuse for fuel cooling - S262 |
| Fuse -1- (15) (automatic gearbox 01J) - S199 | |
| Radiator fan control unit fuse (allroad models) - S142 | |
| Not used (right-hand drive vehicles) |
Fuses not in relay carrier:
Left-hand drive vehicles:
– From model year 2001 onwards auxiliary heater fuse not in electronics box – S62
Right-hand drive vehicles:
– From model year 2001 onwards auxiliary heater fuse not in electronics box – S62
– Fuse for fuel cooling – S262
– Fuse -1- (15) (automatic gearbox 01J) – S199
– Radiator fan control unit fuse (allroad models) – S142
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