Audi 2003 A8 User Manual

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.
10.2 Keyless entry system - overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
10.3 Exterior door handle for keyless entry system - exploded view . . . . . . . . . . . . . . . . . . . . . . 310
10.4 Removing and installing front exterior door handle switches F272 / F273 . . . . . . . . . . . . 311
10.5 Removing and installing rear exterior door handle switches F274 / F275 . . . . . . . . . . . . . . 311
10.6 Removing and installing interior aerial 1 for entry and start authorisation R138 . . . . . . . . 311
10.7 Removing and installing entry and start authorisation control unit J518 . . . . . . . . . . . . . . 312
10.8 Removing and installing interior aerial 2 for entry and start authorisation R139 . . . . . . . . 313
10.9 Removing and installing interior aerial 3 for entry and start authorisation R154 . . . . . . . . 313
10.10 Removing and installing luggage compartment aerial for entry and start authorisation R137
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
10.11 Removing and installing rear bumper aerial for entry and start authorisation R136 . . . . . . 314
11 Anti-theft alarm with ultrasonic interior monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
11.1 Removing and installing sender/receiver module for interior monitoring system G303 or G305
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
11.2 Removing and installing anti-theft/tilt system control unit J529 . . . . . . . . . . . . . . . . . . . . . . 315
11.3 Removing and installing alarm horn H12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
11.4 Removing and installing interior monitoring deactivation switch E183 and alarm system off
switch E217 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
12 Lane change assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
12.1 Lane change assist - overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
12.2 Removing and installing button for lane change assist E530 . . . . . . . . . . . . . . . . . . . . . . 318
12.3 Removing and installing lane change assist warning lamp in exterior mirror K233 / K234
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
12.4 Removing and installing lane change assist control unit J769 / J770 . . . . . . . . . . . . . . . . 321
12.5 Calibrating lane change assist - test equipment layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
12.6 Calibrating lane change assist control unit J769 / J770 . . . . . . . . . . . . . . . . . . . . . . . . . . 322
13 Towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
13.1 Socket for towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
13.2 Removing and installing trailer detector control unit J345 . . . . . . . . . . . . . . . . . . . . . . . . . . 329
97 - Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
2 Component protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
3 Relay carriers, fuse carriers (engine compartment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
3.1 Removing and installing electronics box (plenum chamber) . . . . . . . . . . . . . . . . . . . . . . . . 332
3.2 Removing and installing relay and fuse holder in electronics box (plenum chamber) . . . . 335
4 Relay carriers, fuse carriers (vehicle interior) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
4.1 Removing and installing fuse holder in dash panel (left-side) . . . . . . . . . . . . . . . . . . . . . . 338
4.2 Removing and installing CAN separating connector (left-side) T46a . . . . . . . . . . . . . . . . 339
4.3 Unplugging door separating connector (left-side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
4.4 Removing and installing onboard supply control unit J519 . . . . . . . . . . . . . . . . . . . . . . . . 340
4.5 Removing and installing relay and fuse carrier behind dash panel (left-side) . . . . . . . . . . 341
4.6 Removing and installing electronics box (driver's side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
4.7 Removing and installing fuse holder at dash panel (right-side) . . . . . . . . . . . . . . . . . . . . . . 342
4.8 Removing and installing CAN separating connector (right-side) T46b . . . . . . . . . . . . . . . . 343
4.9 Unplugging door separating connector (right-side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
4.10 Removing and installing main fuse holder, A-pillar (right-side) . . . . . . . . . . . . . . . . . . . . . . 345
4.11 Removing and installing relay carrier in front footwell (right-side) . . . . . . . . . . . . . . . . . . . . 346
4.12 Removing and installing onboard supply control unit 2 J520 . . . . . . . . . . . . . . . . . . . . . . 346
4.13 Removing and installing voltage converter for background lighting (driver's/front passenger's
door) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
4.14 Removing and installing voltage converter for rear left/right door background lighting . . . . 348
5 Relay carriers, fuse carriers (luggage compartment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
5.1 Removing and installing fuse holder in luggage compartment (left-side) . . . . . . . . . . . . . . 349
5.2 Removing and installing relay and fuse holder in luggage compartment (right-side) . . . . . . 350
5.3 Removing and installing heated windscreen control unit J505 . . . . . . . . . . . . . . . . . . . . . . 351
Audi A8 2003 ➤
Electrical system - Edition 08.2014
Contents vii

Audi 2003 A8 Specifications

General

Brand	Audi
Model	2003 A8
Category	Automobile
Language	English