Name: Audi 2003 A8
Brand: Audi
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Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

with respect to the correctness of information in this document. Copyright by AUDI AG.

Workshop Manual

Audi A8 2003 ➤

Electrical system

Edition 08.2014

Service

Service Department. Technical Information

Electrical System1
Table of Contents3
Starter, Current Supply, CCS11
- Contact Corrosion11
- Battery12
- Battery - General Notes12
- Maintenance-Free Batteries12
- Disconnecting and Connecting Battery12
- Removing and Installing Battery13
- Checking Battery16
- Preparations before Measuring No-Load Voltage16
- Charging Battery16
- Preparations before Charging Battery16
- Preparations for Back-Up Power Supply of Battery17
- Removing and Installing Battery Cut-Off Relay J65518
- Removing and Installing Battery Isolation Igniter N25318
- Removing and Installing Energy Management Control Unit J64418
- Removing and Installing Alternator20
- Vehicles with 3.0 Ltr. MPI Engine20
- Vehicles with 2.8 Ltr. and 3.2 Ltr. FSI Engine24
- Vehicles with 3.7 Ltr. and 4.2 Ltr. MPI Engine27
- Vehicles with 4.2 Ltr. FSI Engine30
- Vehicles with 5.2 Ltr. FSI Engine34
- Vehicles with 6.0 Ltr. MPI Engine36
- Vehicles with 3.0 Ltr. TDI Engine40
- Vehicles with 4.0 Ltr. TDI Engine44
- Vehicles with 4.2 Ltr. TDI Engine57
- Checking and Servicing Alternator71
- Checking Alternator71
- Servicing Alternator71
- Removing and Installing Starter72
- Vehicles with 2.8 Ltr. FSI, 3.0 Ltr. MPI and 3.2 Ltr. FSI Engine72
- Vehicles with 3.7 Ltr. and 4.2 Ltr. MPI Engine73
- Vehicles with 4.2 Ltr. FSI Engine77
- Vehicles with 5.2 Ltr. FSI Engine82
- Vehicles with 6.0 Ltr. MPI Engine84
- Vehicles with 3.0 Ltr. TDI Engine87
- Vehicles with 4.0 Ltr. TDI Engine88
- Vehicles with 4.2 Ltr. TDI Engine90
Gauges, Instruments93
- Instrument Cluster93
- Removing and Installing Instrument Cluster93
- Pin Assignment at Multi-Pin Connectors on Instrument Cluster95
- Pin Assignment on Fuel Gauge Senders96
- Pin Assignment at Coolant Temperature Sender G6297
- Removing and Installing Radio-Controlled Clock Receiver J489105
- Removing and Installing Garage Door Operation Control Unit J530105
- Cigarette Lighter, Socket106
- Removing and Installing Cigarette Lighter U1 Permitted Unless Authorised by AUDI AG. AUDI AG Does Not Guarantee or Accept any Liability106
- Removing and Installing Rear Cigarette Lighter U9106
- With Respect to the Correctness of Information in this Document. Copyright by AUDI AG108
- Removing and Installing Rear Cigarette Lighter U9 - Vehicles with Rear Climatronic Operating and Display Unit E265109
- Removing and Installing Cigarette Lighter Illumination Bulb L28110
- Removing and Installing 12 V Socket U18 / U19 in Long Centre Console110
  - Onwards113
- Renewing 12 V Socket U5 - Vehicles from 06.2004 Onwards113
- Horn115
- Removing and Installing Horn and Dual Tone Horn H1115
- Data Bus Diagnostic Interface117
- Data Bus Diagnostic Interface J533117
- Data Bus Diagnostic Interface J533 - Overview117
- Removing and Installing Data Bus Diagnostic Interface J533118
- Connector at Data Bus Diagnostic Interface J533119
Windscreen Wash/Wipe System121
- Contact Corrosion121
- Windscreen Wiper System122
- Moving Windscreen Wipers to Service Position122
- Renewing Wiper Blade122
- Removing and Installing Wiper Arms123
- Adjusting Wiper Arms124
- Removing and Installing Wiper Motor with Wiper Motor Control Unit J400125
- Renewing Wiper Motor with Wiper Motor Control Unit J400128
- Windscreen Washer System130
- Removing and Installing Washer Fluid Reservoir130
- Removing and Installing Washer Jets - Vehicles up to 08.2007131
- Removing and Installing Washer Jets - Vehicles from 09.2007 Onwards131
- Adjusting Washer Jets132
- Protected by Copyright. Copying for Private or Commercial Purposes, in Part or in Whole, Is Not132
- Permitted Unless Authorised by AUDI AG. AUDI AG Does Not Guarantee or Accept any Liability Headlight Washer System133
  - Removing and Installing Headlight Washer Jets133
- With Respect to the Correctness of Information in this Document. Copyright by AUDI AG133
- Adjusting Washer Jets133
- Removing and Installing Washer Fluid Reservoir133
- Washer Fluid Hoses134
Lights, Bulbs, Switches - Exterior135
- Contact Corrosion135
- Halogen Headlights136
- Halogen Headlights - Exploded View136
- Removing and Installing Headlights137
- Adjusting Headlights138
- Preparations for Headlight Bulb Replacement139
- Renewing Bulb for Dipped Beam Headlights142
- Renewing Bulb for Main Beam Headlights143
- Renewing Bulb for Side Lights144
- Renewing Bulb for Turn Signal145
- Renewing Headlight Holders146
- Adapting Headlights for Driving on the Left or Right Side of the Road146
- Halogen Headlights (USA Vehicles)148
- Halogen Headlights - Exploded View148
- Removing and Installing Headlights149
- Adjusting Headlights150
- Preparations before Working on Headlights151
- Renewing Bulb for Dipped Beam Headlights152
- Renewing Bulb for Main Beam Headlights153
- Renewing Parking Light Bulb154
- Renewing Bulb for Turn Signal155
- Renewing Headlight Holders156
- Gas Discharge Headlights157
- Safety Precautions When Handling Gas Discharge Bulbs157
- Gas Discharge Headlight with Cornering Light/Static Cornering Light - Exploded View157
- Removing and Installing Headlights159
- Adjusting Headlights160
- Preparations for Headlight Bulb Replacement162
- Renewing Gas Discharge Bulb168
- Removing and Installing Starter Unit for Gas Discharge Bulb - Vehicles up to 08.2007169
  - 09.2007 Onwards171
- Renewing Bulb for Main Beam Headlights172
- Renewing Bulb for Daytime Running Light174
- Renewing LED Light175
- Renewing Bulb for Static Cornering Light175
- Renewing Bulb for Side Lights - Vehicles Without Static Cornering Light176
- Renewing Bulb for Side Lights - Vehicles with Static Cornering Light177
- Removing and Installing Main and Dip Beam Switch-Over Solenoid N347 / N348179
- Removing and Installing Swivel Module Position Sensor G474 / G475179
- Renewing Bulb for Turn Signal179
- Removing and Installing Dynamic Cornering Light Control Motor V318 / V319180
- Removing and Installing Headlight Range Control Motor V48 / V49180
- Removing and Installing Gas Discharge Bulb Control Unit J343 / J344182
- Removing and Installing Output Module for Headlight J667 / J668182
- Renewing Headlight Holders184
- Adapting Headlights for Driving on the Left or Right Side of the Road - Vehicles with Adjustment Lever184
- Adapting Headlights for Driving on the Left or Right Side of the Road - Vehicles Without Adjustment Lever185
- Gas Discharge Headlights - USA Vehicles187
- Safety Precautions When Handling Gas Discharge Bulbs187
- Gas Discharge Headlights - Exploded View187
- Removing and Installing Headlights189
- Adjusting Headlights190
- Preparations before Working on Headlights192
- Renewing Gas Discharge Bulb195
- Removing and Installing Starter Unit for Gas Discharge Bulb - Vehicles up to 08.2007196
  - 09.2007 Onwards197
- Renewing Bulb for Main Beam Headlights198
- Renewing Bulb for Daytime Running Light200
- Renewing LED Light201
- Renewing Parking Light Bulb201
- Removing and Installing Main and Dip Beam Switch-Over Solenoid N347 / N348202
- Removing and Installing Swivel Module Position Sensor G474 / G475202
- Renewing Bulb for Turn Signal202
- Removing and Installing Dynamic Cornering Light Control Motor V318 / V319203
- Removing and Installing Headlight Range Control Motor V48 / V49203
- Removing and Installing Gas Discharge Bulb Control Unit J343 / J344205
- Removing and Installing Output Module for Headlight J667 / J668205
- Renewing Headlight Holders206
- Side Marker Light (USA Vehicles)208
- Removing and Installing Side Marker Light208
- Renewing Side Marker Light Bulb209
- Fog Lights - Vehicles up to 08.2007211
Removing and Installing Fog Lights - Audi A8211
Renewing Fog Light Bulb - Audi A8 up to 09.2004211
Renewing Fog Light Bulb - Audi A8 from 10.2004 Onwards212
Removing and Installing Fog Lights - Audi S8212
Renewing Fog Light Bulb - Audi S8213
Adjusting Fog Lights214
Fog Lights - Vehicles from 09.2007 Onwards215
Removing and Installing Fog Lights215
Renewing Fog Light Bulb215
Adjusting Fog Lights216
Turn Signal Repeaters - Vehicles up to 08.2007217
Removing and Installing Turn Signal Repeater217
Turn Signal Repeaters - Vehicles from 09.2007 Onwards218
Turn Signal in Exterior Mirror - Exploded View218
Removing and Installing Exterior Mirror Turn Signal Bulb L131 / L132218
Entry Light in Exterior Mirror - Vehicles up to 08.2007222
Removing and Installing Entry Light in Exterior Mirror W52 / W53222
Entry Light in Exterior Mirror - Vehicles from 09.2007 Onwards224
Entry Light in Exterior Mirror - Exploded View224
Removing and Installing Entry Light in Exterior Mirror W52 / W53224
Exterior Door Handle Lighting228
Removing and Installing Exterior Door Handle Lighting228
Outer Tail Light Cluster - Vehicles up to 08.2007229
Outer Tail Light Cluster - Exploded View229
Removing and Installing Outer Tail Light Cluster230
Removing and Installing LED Printed Circuit Boards for Tail Light Cluster230
Removing and Installing Tail Light Control Unit231
Aligning Tail Light Cluster with Body Contour231
Tightening Torque232
Outer Tail Light Cluster - USA Vehicles up to 08.2007233
Outer Tail Light Cluster - Exploded View233
Removing and Installing Outer Tail Light Cluster234
Removing and Installing LED Printed Circuit Boards for Tail Light Cluster234
Removing and Installing Tail Light Control Unit235
Aligning Tail Light Cluster with Body Contour235
16. Outer Tail Light Cluster - Vehicles from 09.2007 Onwards237
Outer Tail Light Cluster - Exploded View237
Removing and Installing Outer Tail Light Cluster238
Aligning Tail Light Cluster with Body Contour238
Inner Tail Light Cluster - Vehicles up to 08.2007240
Inner Tail Light Cluster - Exploded View240
Removing and Installing Inner Tail Light Cluster240
Removing and Installing Bulb for Reversing Light and Rear Fog Light241
Removing and Installing LED Printed Circuit Boards and Tail Light Control Unit242
Aligning Tail Light Cluster with Body Contour242
Inner Tail Light Cluster - USA Vehicles up to 08.2007243
Inner Tail Light Cluster - Exploded View243
Removing and Installing Inner Tail Light Cluster243
Removing and Installing Bulb for Reversing Light and Rear Fog Light244
Removing and Installing LED Printed Circuit Boards and Tail Light Control Unit245
Aligning Tail Light Cluster with Body Contour245
Inner Tail Light Cluster - Vehicles from 09.2007 Onwards246
Inner Tail Light Cluster - Exploded View246
Removing and Installing Inner Tail Light Cluster246
Removing and Installing Bulb for Reversing Light247
- Removing and Installing Bulb for Rear Fog Light248
- Aligning Tail Light Cluster with Body Contour249
- High-Level Brake Light250
- Removing and Installing High-Level Brake Light250
- Number Plate Light251
- Removing and Installing Number Plate Light - Vehicles up to 08.2007251
- Removing and Installing Number Plate Light - Vehicles from 09.2007 Onwards251
- Steering Column Switch Module252
- Steering Column Switch Module - Exploded View252
- Removing and Installing Steering Column Switch Module253
- Removing and Installing Return Ring with Slip Ring254
- Removing and Installing Steering Angle Sender G85256
- Removing and Installing Steering Column Electronics Control Unit J527256
- Pin Assignment at Steering Column Electronics Control Unit J527 (Front)257
- Pin Assignment at Steering Column Electronics Control Unit J527 (Reverse Side)259
- Removing and Installing Turn Signal Switch E2260
- Removing and Installing Cruise Control System Switch E45261
- Removing and Installing Intermittent Wiper Switch E22261
- Entry and Start Authorisation Switch E415263
- Removing and Installing Entry and Start Authorisation Switch E415263
- Pin Assignment at Entry and Start Authorisation Switch E415264
- Parking Aid265
- Parking Aid - Overview265
- Removing and Installing Parking Aid Control Unit J446 (Vehicles up to 11.2005)266
- Removing and Installing Parking Aid Control Unit J446 (Vehicles from 11.2005)267
- Removing and Installing Front Parking Aid Warning Buzzer H22 - 8-Channel Parking Aid267
- Removing and Installing Rear Parking Aid Warning Buzzer H15267
- Removing and Installing Front Parking Aid Senders - Vehicles with Twin Grille268
- Removing and Installing Front Parking Aid Senders - Vehicles with Single-Frame Radiator270
  - Grille270
- Removing and Installing Rear Parking Aid Senders270
- Automatic Headlight Range Control272
- Automatic Headlight Range Control - Overview272
- Removing and Installing Control Unit for Headlight Range Control J431272
- Protected by Copyright. Copying for Private or Commercial Purposes, in Part or in Whole, Is Not273
Lights, Bulbs, Switches - Interior274
- Contact Corrosion274
- Lights and Switches in Dash Panel275
- Removing and Installing Buttons in Instrument Cluster Trim275
- Removing and Installing Light Switch276
- Removing and Installing Steering Column Adjustment Switch E167276
- Removing and Installing Switches in Dash Panel277
- Removing and Installing Glove Compartment Light278
- Removing and Installing Glove Compartment Light Switch E26278
- Removing and Installing Footwell Light (Front)278
- Lights and Switches in Front Doors280
- Removing and Installing Bulb for Door Opener Light280
- Removing and Installing Mirror Adjustment Switch E43280
- Removing and Installing Operating Unit for Window Regulator in Driver Door E512282
- Removing and Installing Window Regulator Switch in Front Passenger Door E107283
- Removing and Installing Driver Side Interior Locking Switch E150 / Front Passenger Side Interior Locking Switch E198283
- Removing and Installing Interior Door Lighting Strip284
Removing and Installing Driver Seat/Front Passenger Seat Memory Operating Unit286
Removing and Installing Emergency-Off Button E190 / E466 for Driver Seat/Front Passenger Seat Memory Operating Unit288
Removing and Installing Front Passenger Seat Adjustment Switch E157289
Removing and Installing Door Contact Switch290
Removing and Installing Door Warning Lamp and Entry Light291
Lights and Switches in Rear Doors292
Removing and Installing Bulb for Door Opener Light292
Removing and Installing Rear Left/Rear Right Window Regulator Switch, in Door292
Removing and Installing Interior Door Lighting Strip293
Removing and Installing Background Light in Storage Compartment in Door294
Removing and Installing Rear Left Interior Locking Switch E273 / Rear Right Interior Locking Switch E274295
Removing and Installing Door Contact Switch295
Removing and Installing Door Warning Lamp and Entry Light295
Lights and Switches in Centre Console297
Removing and Installing Light for Centre Console (Front)297
Removing and Installing Front Seat Heating Switches299
Removing and Installing Rear Seat Heating Switches299
Lights and Switches in Seats and Luggage Compartment300
Removing and Installing Footwell Light (Rear)300
Removing and Installing Luggage Compartment Lights300
Removing and Installing Button to Close Rear Lid in Luggage Compartment E406301
Removing and Installing Contact Switch in Lock Cylinder for Rear Lid, Anti-Theft System and Central Locking System F124301
Lights and Switches in Roof Trim302
Removing and Installing Vanity Mirror Light302
- Up to 08.2007302
Removing and Installing Front Interior Light with Roof Electronics Control Unit J528 - Vehicles from 09.2007 Onwards303
Renewing Bulbs for Interior Light (Front)305
Removing and Installing Garage Door Operating Unit E284306
Renewing Bulbs for Reading Light (Front)306
Removing and Installing LED for Background Light (Front)306
Removing and Installing Rear Interior Light/Reading Light with Rear Operating Unit for Roof Module E467 - Vehicles up to 08.2007306
Renewing Rear Interior Light Bulb - Vehicles up to 08.2007307
Renewing Rear Reading Light Bulb - Vehicles up to 08.2007308
Removing and Installing Rear Interior Light/Reading Light with Rear Operating Unit for Roof Module E467 - Vehicles from 09.2007 Onwards308
Renewing Rear Interior Light Bulb - Vehicles from 09.2007 Onwards309
Renewing Rear Reading Light Bulb - Vehicles from 09.2007 Onwards310
Removing and Installing LED for Background Light (Rear)310
Removing and Installing Illuminated Vanity Mirror (Rear)310
Removing and Installing Vanity Mirror Light (Rear)311
Components on Interior Mirror312
- Removing and Installing Light Sensor G399312
With Respect to the Correctness of Information in this Document. Copyright by AUDI AG312
Removing and Installing Humidity Sender G355 - Vehicles Without Lane Departure Warning312
Removing and Installing Humidity Sender G355 - Vehicles with Lane Departure Warning314
Immobiliser317
Entry and Start Authorisation System318
Entry and Start Authorisation System - Overview318
- Keyless Entry System - Overview319
- Exterior Door Handle for Keyless Entry System - Exploded View320
- Removing and Installing Front Exterior Door Handle Switches F272 / F273321
- Removing and Installing Rear Exterior Door Handle Switches F274 / F275321
- Removing and Installing Interior Aerial 1 for Entry and Start Authorisation R138321
- Removing and Installing Entry and Start Authorisation Control Unit J518322
- Removing and Installing Interior Aerial 2 for Entry and Start Authorisation R139323
- Removing and Installing Interior Aerial 3 for Entry and Start Authorisation R154323
- Removing and Installing Luggage Compartment Aerial for Entry and Start Authorisation R137324
- Removing and Installing Rear Bumper Aerial for Entry and Start Authorisation R136324
- Anti-Theft Alarm with Ultrasonic Interior Monitor325
- Removing and Installing Sender/Receiver Module for Interior Monitoring System G303 or G305325
- Removing and Installing Anti-Theft/Tilt System Control Unit J529325
- Removing and Installing Alarm Horn H12325
- Removing and Installing Interior Monitoring Deactivation Switch E183 and Alarm System off Switch E217326
- Lane Change Assist328
- Lane Change Assist - Overview328
- Removing and Installing Button for Lane Change Assist E530328
- Removing and Installing Lane Change Assist Warning Lamp in Exterior Mirror329
- Removing and Installing Lane Change Assist Control Unit J769 / J770331
- Calibrating Lane Change Assist - Test Equipment Layout331
- Calibrating Lane Change Assist Control Unit J769 / J770332
- Towing Bracket339
- Socket for Towing Bracket339
- Removing and Installing Trailer Detector Control Unit J345339
Wiring340
- Contact Corrosion340
- Component Protection341
- Relay Carriers, Fuse Carriers (Engine Compartment)342
- Removing and Installing Electronics Box (Plenum Chamber)342
- Removing and Installing Relay and Fuse Holder in Electronics Box (Plenum Chamber)345
- Relay Carriers, Fuse Carriers (Vehicle Interior)348
- Removing and Installing Fuse Holder in Dash Panel (Left-Side)348
- Removing and Installing CAN Separating Connector (Left-Side) T46A349
- Unplugging Door Separating Connector (Left-Side)350
- Removing and Installing Onboard Supply Control Unit J519350
- Removing and Installing Relay and Fuse Carrier Behind Dash Panel (Left-Side)351
- Removing and Installing Electronics Box (Driver's Side)351
- Removing and Installing Fuse Holder at Dash Panel (Right-Side)352
- Removing and Installing CAN Separating Connector (Right-Side) T46B353
- Unplugging Door Separating Connector (Right-Side)354
- Removing and Installing Main Fuse Holder, A-Pillar (Right-Side)355
- Removing and Installing Relay Carrier in Front Footwell (Right-Side)356
- Removing and Installing Onboard Supply Control Unit 2 J520356
- Removing and Installing Voltage Converter for Background Lighting357
  - Door)357
- Removing and Installing Voltage Converter for Rear Left/Right Door Background Lighting358
- Relay Carriers, Fuse Carriers (Luggage Compartment)359
- Removing and Installing Fuse Holder in Luggage Compartment (Left-Side)359
- Removing and Installing Relay and Fuse Holder in Luggage Compartment (Right-Side)360
- Removing and Installing Heated Windscreen Control Unit J505361
Repairing Wiring Harnesses and Electrical Connectors363
Repairing Connector Housings and Electrical Connectors364
Releasing and Dismantling Connector Housings365
Cleaning Contact Surfaces with Contact Surface Cleaning Set VAS 6410366
Repairing Aerial Wires367
Fibre Optic Cables368
Vehicle Diagnostic, Testing and Information Systems369

Brand	Audi
Model	2003 A8
Category	Automobile
Language	English

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