IDENTIFICATION
| WARNING | Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SAFETY REQUIREMENTS FOR AIRBAGS in BODY INTERIOR article. |
ENGINE CODE
Engines are identified by a 3-letter code stamped on the engine. For engine code locations (Scheme 18)- (Scheme 21). Engine codes are also located on the vehicle data plate.
Scheme 18
Scheme 19
Scheme 20
Scheme 21
Scheme 22
| Location No. | Description | Refer to |
|---|---|---|
| 1 | Main Fuse | (Scheme 24) |
| 2 | Connector station - Right A-pillar | (Scheme 30) |
| 3 | Connector station - RF seat wiring | (Scheme 34) |
| 4 | Relay panel (3-position) | (Scheme 26) |
| 5 | Relay panel (9-position) at Vehicle Electrical System Control Module | (Scheme 29) |
| 6 | Relay panel (4-position) with threaded connection | (Scheme 28) |
| 7 | Connector station - LF seat wiring | (Scheme 34) |
| 8 | Fuse panel | (Scheme 25) |
| 9 | Connector station - Left A-pillar | (Scheme 32) |
| 10 | Connector station E-Box | (Scheme 35) |
| 11 | Relay panel (Carrier) E-Box | (Scheme 27) |
| For component locations refer to overview illustration (Scheme 22) | ||
| WARNING | Never replace a fuse with one that has a higher amperage rating. A fuse with a too high amperage could damage the electrical part and cause a fire. |
For access to fuse box (Scheme 23)
Scheme 23
Main Fuse (Engine Compartment)
The main fuse is located on the battery positive post, the fuse is numbered "S88" and has an amperage rating of 150 amps. The battery is located in the plenum chamber on right side of engine compartment.
Scheme 24
| Designation | Amp Rating |
|---|---|
| S88 - Strip fuse | 150A |
MAIN FUSE IDENTIFICATION (ENGINE COMPARTMENT - RIGHT SIDE)
Scheme 25
| Fuse No. | Function/Component | Amp Rating (A) |
|---|---|---|
| 1 | E87 - A/C Control Head J255 - Climatronic Control Module | 10A |
| 2 | W9 - Left Footwell Light W10 - Right Footwell Light | 5A |
| 3 | Z20 - Left Washer Nozzle Heater Z21 - Right Washer Nozzle Heater | 5A |
| 4 | J293 - Coolant Fan Control (FC) Control Module J671 - Coolant Fan Control (FC) Control Module 2 | 5A |
| 5 | E272 - Function Selector Switch II F189 - Tiptronic Switch G266 - Oil Level Thermal Sensor J401 - Navigation System with CD Drive Control Module J446 - Parking Aid Control Module J526 - Telephone Control Module R36 - Telephone Transceiver | 10A |
| 6 | G65 - High Pressure Sensor G238 - Sensor for air quality | 5A |
| 7 | E132 - Anti-Slip Control Switch F36 - Clutch Pedal Switch G85 - Steering Angle Sensor J104 - ABS Control Module | 10A |
| 8 | J526 - Telephone/Telematics Control Module R36 - Telephone Transceiver R86 - Telephone Amplifier | 5A |
| 9 | J569 - Brake Booster Relay | 15A |
| 10 | E102 - Headlamp Adjuster J431 - Headlamp Range Control Module V48 - Left Headlamp Beam Adjusting Motor V49 - Right Headlamp Beam Adjusting Motor | 5A |
| 11 | Not used | |
| 12 | T16 - 16 pin connector, black, diagnostic connector | 10A |
| 13 | J527 - Steering Column Electronic Systems Control Module | 10A |
| 14 | F - Brake Light Switch M9 - Left Brake Lamp M10 - Right Brake Lamp M25 - High-mount Brake Light | 10A |
| 15 | J285 - Instrument Cluster Control Module J401 - Navigation System with CD Drive Control Module | 10A |
| 16 | E284 - Garage Door Opener Control Head J530 - Garage Door Opener Control Module | 5A |
| 17 | J446 - Parking Aid Control Module J502 - Tire Pressure Monitoring Control Module | 10A |
| 18 | Not used | |
| 19 | E23 - Fog Lamp Switch | 10A |
| 20 | J344 - Right High-intensity Gas Discharge Lamp Control Module M31 - Right Low Beam Headlamp M32 - Right High Beam Headlamp V49 - Right Headlamp Beam Adjusting Motor | 15A |
| 21 | J343 - Left High-intensity Gas Discharge Lamp Control Module M29 - Left Low Beam Headlamp M29 - Left High Beam Headlamp V48 - Left Headlamp Beam Adjusting Motor | 15A |
| 22 | J386 - Drivers Door Control Module J387 - Front Passenger's Door Control Module V14 - Left Window Motor V15 - Right Window Motor | 15A |
| 23 | Not used | |
| 24 | J393 - Comfort System Central Control Module | 20A |
| 25 | J126 - Fresh Air Blower Control Module | 30A |
| 26 | J9 - Rear Window Defogger Relay E87 - A/C Control Head | 30A |
| 27 | J345 - Towing Recognition Control Module | 30A |
| 28 | G6 - Transfer Fuel Pump (FP) J538 - Fuel Pump (FP) Control Module | 20A |
| 29 | N - Ignition Coil N70 - Ignition Coil 1 with Power Output Stage N127 - Ignition Coil 2 with Power Output Stage N128 - Ignition Coil 2 N158 - Ignition Coil 3 N291 - Ignition Coil 3 with Power Output Stage N292 - Ignition Coil 4 with Power Output Stage N323 - Ignition Coil 5 with Power Output Stage N324 - Ignition Coil 6 with Power Output Stage N325 - Ignition Coil 7 with Power Output Stage N326 - Ignition Coil 8 with Power Output Stage | 20A |
| 30 | J245 - Convertible Top Control Module | 30A |
| 31 | F4 - Back-Up Light Switch F125 - Multi-Function Transmission Range (TR) Switch G70 - Mass Air Flow (MAF) Sensor J60 - Starting Interlock Relay J217 - Transmission Control Module (1CM) M16 - Left Back-Up Lamp M17 - Right Back-Up Lamp T16 - 16 Position Connector, Black Data Link Connector (DLC) Y7 - Automatic Day/Night Interior Mirror | 15A |
| 32 | N30 - Cylinder 1 Fuel Injector N31 - Cylinder 2 Fuel Injector N32 - Cylinder 3 Fuel Injector N33 - Cylinder 4 Fuel Injector N83 - Cylinder 5 Fuel Injector N84 - Cylinder 6 Fuel Injector N85 - Cylinder 7 Fuel Injector N86 - Cylinder 8 Fuel Injector | 20A |
| 33 | U1 - Cigarette lighter | 15A |
| U1 - Cigarette Lighter (from 2006 m.y.) | 20A | |
| 34 | G70 - Mass Air Flow (MAF) Sensor J155 - Turbocharger (IC) Coolant Pump Control Module N80 - Evaporative Emission (EVAP) Canister Purge Regulator N112 - Secondary Air Injection (AIR) Solenoid Valve N144 - Left Mount Solenoid Valve N145 - Right Electro-Hydraulic Engine Mount Solenoid Valve N156 - Intake Manifold Change-Over Valve Z19 - Oxygen Sensor (O2S) Heater Z29 - Oxygen Sensor (O2S) Heater 1 (behind Three Way Catalytic Converter (TWC)) | 15A |
| 35 | U - Socket | 30A |
| U1 - Socket (from 2006 m.y.) | 20A | |
| 36 | J519 - Vehicle Electrical System Control Module | 30A |
| 37 | J519 - Vehicle Electrical System Control Module V11 - Headlamp Washer Pump | 30A |
| 38 | G303 - Radar Interior Monitoring Control Module 1 G305 - Radar Interior Monitoring Control Module 2 H12 - Alarm Horn J393 - Comfort System Central Control Module | 15A |
| 39 | J401 - Navigation System with CD Drive Control Module J402 - Operating Electronics, Navigation Control Module J415 - Tuner for navigation/ TV R - Radio R12 - Amplifier R94 - Navigation Interface T8 - 8 Pin Connector, black, radio connector III | 20A |
| 40 | H2 - High Tone Horn H7 - Low Tone Horn J4 - Horn Relay | 25A |
| 41 | Not used | 30A |
| 42 | J104 - ABS Control Module | 25A |
| 43 | J220 - Motronic Engine Control Module (ECM) N75 - Wastegate Bypass Regulator Valve N205 - Valve 1 for camshaft adjustment N208 - Valve 2 for camshaft adjustment | 15A |
| 44 | J215 - Climatronic Control Module J216 - Right Rear Heated Seat Control Module | 30A |
| J215 - Left Rear Heated Seat Control Module (from 2006 m.y.) J216 - Right Rear Heated Seat Control Module (from 2006 m.y) | 35A | |
| Some of the equipment items listed are optional or only available on certain model configurations. | ||
IDENTIFYING FUSES (INSTRUMENT PANEL - LEFT SIDE)
AUTOMATIC CIRCUIT BREAKERS
The electric power windows and the electric seat adjusters are protected with Circuit breakers which reset automatically after the circuit overload has been corrected.
Note. Whenever replacing a fuse, always consult the sticker on the inside of the fuse panel cover. It contains the most up-to-date information regarding the fuse arrangement.
Relay Panel (3 Position) Dash Panel Driver's Side
For relay number, position number and circuits protected, see IDENTIFYING RELAYS (3 POSITION) DASH PANEL DRIVER'S SIDE) table. For fuse number, position number, amperage rating and circuits protected, see IDENTIFYING RELAYS (3 POSITION) DASH PANEL DRIVER'S SIDE table.
Note. The relay panel (3 position) carrier is located on the driver's side dash panel area on the right side. For fuse and relay positions within the panel (Scheme 26)
Scheme 26
| Position | Socket Color | Circuit Protected |
|---|---|---|
| 2 | Black | J359 - Preheating Coolant , Low Heat Output Relay |
| 3 | Brown | J360 - Preheating Coolant , High Heat Output Relay |
| Note: The remaining items in the relay carrier are not used. | ||
IDENTIFYING RELAYS (3 POSITION) DASH PANEL DRIVER'S SIDE)
| Position | Socket Color | Circuit Protected | Amp Rating |
|---|---|---|---|
| B | Black | S328 - Auxiliary Heater Fuse 2 | 60A |
| C | Green | S126 - Auxiliary Heater Fuse | 40A |
| Note: The remaining items in the relay carrier are not used. | |||
IDENTIFYING RELAYS (3 POSITION) DASH PANEL DRIVER'S SIDE
Relay Carrier In Electronics Box, Plenum Chamber
For fuse and relay positions within the panel (Scheme 27)
For relay number, position number and circuits protected, see the appropriate IDENTIFYING RELAYS table.
For fuse number, position number, amperage rating and circuits protected, see the appropriate IDENTIFYING FUSES table.
Note. The relay panel (4 position) carrier is located in electronics box, plenum chamber, in the left rear corner of the engine compartment.
Scheme 27
Relay Carrier E-Box (Gasoline Engine)
For identification of the relay panel 4 position carrier and it's layout (Scheme 27)
| Position No. | Socket Color | Circuit Protected |
|---|---|---|
| 1 | Black | J60 - Starter Interlock Alarm System Relay |
| 1.1 | Red | J151 - Coolant Circulation Pump Relay |
| 2 | Brown | J299 - Secondary Air Injection (AIR) Pump Relay |
| 3 | Black | J271 - Motronic (ECM) Power Supply Relay |
| 3 | Red | J155 - Turbocharger (TC) Coolant Pump Relay |
| 4 | Blue | J226 - Park/Nuetral Position (PNP) Relay |
| J434 - Starter Lock/Clutch Pedal Switch Relay | ||
| Note: The remaining items in the relay carrier are not used. | ||
IDENTIFYING RELAYS (RELAY CARRIER IN E-BOX - GASOLINE ENGINE)
| Position No. | Socket Color | Amp Rating | Circuit Protected |
|---|---|---|---|
| A | Black | 15A | S282 - Engine Electronics Fuse |
| B | Black | 40A | S130- Secondary Air Injection (AIR) Pump fuse |
| C | Grey | 15A | S286 - Automatic Transmission After-Run Fuse |
| Note: The remaining items in the relay carrier are not used. | |||
IDENTIFYING RELAYS (RELAY CARRIER IN E-BOX - GASOLINE ENGINE)
Relay Carrier E-Box (Diesel Engine*)
For identification of the relay panel 4 position carrier and it's layout (Scheme 27)
| Position No. | Socket Color | Circuit Protected |
|---|---|---|
| 1 | Black | J60 - Starter Interlock Alarm System Relay |
| 1.2 | Blue | J17 - Fuel Pump (FP) Relay |
| 2 | Black | J52 - Glow Plug Relay |
| 3 | Brown | J317 - Power Supply (Terminal 30, B+) Relay |
| 4 | Black | J226 - Park/Nuetral Position (PNP) Relay |
| J434 - Starter Lock/Clutch Pedal Switch Relay | ||
| The remaining items in the relay carrier are not used. *: Diesel engine - not for USA/CDN. | ||
IDENTIFYING RELAYS (RELAY CARRIER IN E-BOX - DIESEL ENGINE)
| Position No. | Socket Color | Amp Rating | Circuit Protected |
|---|---|---|---|
| A | Black | 15A | S102 - Engine Control Module (ECM) Fuse |
| B | Black | 60A | S39 - Engine Glow Plug Fuse Strip |
| C | Grey | 15A | S286 - Automatic Transmission After-Run Fuse |
| D | Red | 60A | S189 - Fuse 2 For Glow Plugs |
| E | V274 - Control Module Cooling Fan | ||
| F | Red | 60A | S189 - Fuse 2 For Glow Plugs |
| Items D, E and F are in electronic box, plenum chamber. : The remaining items in the relay carrier are not used. *: Diesel engine - not for USA/CDN. | |||
IDENTIFYING RELAYS (RELAY CARRIER IN E-BOX - DIESEL ENGINE)
Relay Panel (4-Position) With Threaded Connection
For fuse and relay positions within carrier (Scheme 28) For relay number, position number and circuits protected, see RELAY IDENTIFICATION (RELAY PANEL (4-POSITION) WITH THREADED CONNECTION) table. For fuse number, position number, amperage rating and circuits protected, see FUSE IDENTIFICATION (RELAY PANEL (4-POSITION) WITH THREADED CONNECTION) table.
Note. The relay panel (4-position) carrier is located under driver's side of instrument panel.
Scheme 28
| Position No. | Socket Color | Circuit Protected |
|---|---|---|
| 3 | White | J662 - NG Engine Throttle Relay 1 (Driving school) |
| 4 | Blue | J663 - NG Engine Throttle Relay 2 (Driving school) |
| Note: The remaining items in the relay carrier are not used. | ||
RELAY IDENTIFICATION (RELAY PANEL (4-POSITION) WITH THREADED CONNECTION)
| Position No. | Socket Color | Amp Rating | Circuit Protected |
|---|---|---|---|
| B | Optional Equipment, Repeller system | ||
| E | Black | 40A | S214 - Radiator After run Fuse |
| G | Black | 40A 60A | S42 - Coolant Fan Fuse S42 - Coolant Fan Fuse |
| H | Brown | 40A | S123 - ABS Control Module Fuse 1 |
| Note: The remaining items in the relay carrier are not used. | |||
FUSE IDENTIFICATION (RELAY PANEL (4-POSITION) WITH THREADED CONNECTION)
Relay Panel (9-Position) At Vehicle Electrical System Control Module
For fuse and relay position within carrier (Scheme 29) For relay number, position number and circuits protected, see RELAY IDENTIFICATION (RELAY PANEL (9-POSITION)) table. For fuse number, position number, amperage rating and circuits protected, see FUSE IDENTIFICATION (RELAY PANEL (9-POSITION)) table.
Note. The relay panel (9-position) is located behind instrument panel, driver's side, behind 3-position relay panel.
Scheme 29
| Position No. | Socket No. | Circuit Protected |
|---|---|---|
| 1 | Green | J17 - Fuel Pump (FP) Relay |
| 2 | Red | J236 - Servotronic Control Module |
| 3 | Blue | J4 - Horn Relay |
| 4 | Brown | J569 - Brake Booster Relay |
| 5 | Purple | J9 - Rear Window Defogger Relay |
| 6 | Black | J59 - Load Reduction Relay |
| Note: The remaining items in the relay carrier are not used. | ||
RELAY IDENTIFICATION (RELAY PANEL (9-POSITION))
| Position No. | Socket Color | Amp Rating | Circuit Protected |
|---|---|---|---|
| B | Brown | 40A | S67 - Convertible Top Operation Fuse |
| D | Brown | 30A | S280 - Power Windows Fuse 2 |
| E | Red | 30A | S45 - Driver's Power Seat Adjustment Circuit Breaker 2 |
| F | Black | 30A | S37 - Power Windows Fuse |
| G | Green | 30A | S77 - Trailer (terminal 30, B+) Fuse |
| Note: The remaining items in the relay carrier are not used. | |||
FUSE IDENTIFICATION (RELAY PANEL (9-POSITION))
CONNECTOR STATION - RIGHT A PILLAR
The connector station is located at the right side footwell below the A-pillar trim. For pin and fuse position in connector station, see illustrations below.
Scheme 30
Scheme 31
| Fuse Position | Socket Color | Amp Rating | Circuit Protected |
|---|---|---|---|
| E | Black | 30A | S46 - Power Seat |
| Black | 10A | S46 - Power Seat, Lumbar Adjustment. | |
| Note: The remaining items in the connector point are not used. | |||
FUSE IDENTIFICATION (CONNECTOR STATION - RIGHT)
| Position No. | Designation | Component | |
|---|---|---|---|
| 13 | T6p, 6 pin connector, Lilac | Satellite radio | |
| 14 | T6q, 6 pin connector, Lilac | Satellite radio | |
| 15 | T17c, 17 pin connector, Red | Headlamp | |
| Note: The remaining items in the connector point are not used. | |||
PIN IDENTIFICATION (CONNECTOR STATION - RIGHT)
CONNECTOR STATION - LEFT A PILLAR
The connector station is located at the left side footwell below the A-pillar trim. For pin and fuse position in connector station, see illustrations below.
Scheme 32
Scheme 33
| Position No. | Designation | Component |
|---|---|---|
| 7 | T6b - 6 pin connector, Black | Servotronic |
| 8 | T10i - 10 pin connector, Blue | Parking aid (where applicable) |
| 12 | T10k - 10 pin connector, White | Auxiliary heater |
| 13 | T10c - 10 pin connector, Violet | Wiper motor |
| 14 | T10d -10 pin connector, Grey | Fan/compressor |
| 15 | T17b - 17 pin connector, Green | Left headlight (connector 3) |
| 16 | T17a - 17 pin connector, Red | Left headlight (connector 2) |
| 17 | T17 - 17 pin connector, Black | Left headlight (connector 1) |
| B | T1a - 1 pin connector, Black | Headlight washer system |
| Note: The remaining items in the connector point are not used. | ||
PIN & FUSE IDENTIFICATION (CONNECTOR STATION - LEFT)
CONNECTOR STATION - LF/RF SEAT WIRING
The connector stations are located under the passenger seat and under the driver seat. For pin position in connector station, see illustration below.
Scheme 34
| Position No. | Designation | Component |
|---|---|---|
| 1 | T3d - 3 pin connector, Yellow | Side airbag |
| 2 | T10p - 10 pin connector, Red | Supply |
| 3 | T6e - 6 pin connector, Green | Seat heating |
| 4 | T8c - 8 pin connector Black | Seat belt buckle |
PIN IDENTIFICATION (CONNECTOR STATION - RIGHT SEAT WIRING)
| Position No. | Designation | Component |
|---|---|---|
| 1 | T3c - 3 pin connector, Yellow | Side airbag |
| 2 | T10o - 10 pin connector, Red | Supply |
| 3 | T6d - 6 pin connector, Green | Seat heating |
| 4 | T8b - 8 pin connector Black | Seat belt buckle |
PIN IDENTIFICATION (CONNECTOR STATION - LEFT SEAT WIRING)
CONNECTOR STATION E-BOX
The connector station is located In the electronic box in plenum chamber on left side of engine compartment. For pin position in connector station, see illustration below.
Scheme 35
| Position No. | Designation | Component |
|---|---|---|
| 1 | T10 - 10 pin connector, Black | Engine/Transmission (connector 2) |
| 2 | T10a - 10 pin connector, Brown | Engine/Transmission (connector 3) |
| 3 | T17d - 17 pin connector, Red | Engine/Transmission (connector 1) |
| 6 | T17e - 17 pin connector, White | Engine/Transmission (connector 4) |
| Note: The remaining items in the connector point are not used. | ||
PIN IDENTIFICATION (CONNECTOR STATION - E-BOX)
FUSES - CIRCUIT PROTECTION
| WARNING | Never replace a fuse with one that has a higher amperage rating. A fuse with a too high amperage could damage the electrical part and cause a fire. |
For access to fuse box see scheme 19
REPLACING A FUSE
A problem in the electrical system may be caused by a blown fuse.
- Switch off the ignition and the electrical component affected.
- Carefully pry the face cover off the instrument panel using the ignition key or a screwdriver. see scheme 19
- Check the fuse index to find out which fuse belongs to the component which has failed. See «FUSES»(/audi/a4/b7-2004-2009/remont/fuses-circuit-breakers/#fuses-circuit-breakers-cabriolet).
- Remove the blown fuse with the plastic clip provided. The clip is located on the holder in the fuse box.
- Replace a blown fuse (recognizable by the melted metal strip inside) with a fuse of the same amperage.
- Firmly snap the cover back onto the instrument panel face.
The various electrical circuits are protected by fuses. The fuses are clustered in a centralized unit. The unit is located behind the face panel at the end of the instrument panel.
Two spare fuses end a sticker identifying the fuses are located on the inside of the fuse box cover.
You are well advised to keep a supply of spare fuses in your vehicle. Fuses with the proper ampere ratings are available at your Audi dealer.
Note. On no account should fuses be repaired (e.g. with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause fire. If a fuse blows repeatedly, do not keep replacing it. Track and fix shorted or overloaded circuit.
FUSE - COLOR CODES
Identifying fuse color and ampere rating, refer to table below.
| WARNING | Never replace a fuse with one that has a higher amperage rating. A fuse with a too high amperage could damage the electrical part and cause a fire. |
| Current Rating Amperes | Color |
|---|---|
| 1A | Black |
| 3A | Violet |
| 5A | Light Brown |
| 7.5A | Brown |
| 10A | Red |
| 15A | Blue |
| 20A | Yellow |
| 25A | White or Natural |
| 30A | Green |
| 35A | Green-Blue |
| 40A | Orange |
| 50A | Red |
IDENTIFYING FUSE BY COLOR