SSP 992303 2004 A8L Technical Features.pdf

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The 2004 Audi A8L
Technical Features
Design and Function
Self-Study Program
Course Number 992303
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Audi of America, Inc.
Service Training
Printed in U.S.A.
Printed 02/2003
Course Number 992303
©2003 Audi of America, Inc.
All rights reserved. All information contained
in this manual is based on the latest
information available at the time of printing and
is subject to the copyright and other intellectual
property rights of Audi of America, Inc., its
affiliated companies and its licensors. All rights
are reserved to make changes at any time
without notice. No part of this document may
be reproduced, stored in a retrieval system,
or transmitted in any form or by any
means, electronic, mechanical, photocopying,
recording or otherwise, nor may these
materials be modified or reposted to other sites
without the prior expressed written permission
of the publisher.
All requests for permission to copy and
redistribute information should be referred to
Audi of America, Inc.
Always check Technical Bulletins and the
Audi Worldwide Repair Information System
for information that may supersede any
information included in this booklet.
Trademarks: All brand names and product
names used in this manual are trade names,
service marks, trademarks, or registered
trademarks; and are the property of their
respective owners.
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Table of Contents
Introduction ............................................................................... 1
The New Audi Flagship, Technical Innovations,
Specifications
Engine – Mechanics .................................................................. 5
Technical Data – 4.2-Liter V8-5V Gasoline Engine,
Engine Mounting
Engine – Variable-Intake Manifold ........................................... 7
4.2-Liter V8-5V Gasoline Engine
Engine Management ............................................................... 10
System Overview
Engine – Automatic Start Control ......................................... 12
Introduction, Sequence of Operations, Automatic Start
Control Functional Diagram
Fuel Supply .............................................................................. 15
Fuel Tank, Expansion Tank, Two-Stage Fuel Pumps,
Fuel Flow, Fuel Level Sensors, Determining Fuel Level
Exhaust System ...................................................................... 23
Dual-Flow Exhaust System
Automatic Transmission......................................................... 24
Six-Speed Automatic Transmission 09E,
Technical Data, Design
Running Gear ........................................................................... 29
Front Axle, Rear Axle, Air Suspension with
Electronic Damping Control, System Overview,
Electric Parking Brake
Body ......................................................................................... 35
Body Structure, Power-Assisted Luggage Compartment
Lid, Door Design
Occupant Protection ............................................................... 42
8.4E+ Airbag System Overview, 8.4E+ Airbag System
Functional Diagram, Two-Stage Front Airbags, Ring Airbag,
Front Knee Airbags, Detection of Rear-End Collision,
Active Head Restraints, Seat Belt Tensioners, Battery
Switch-Off Relay J655
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Table of Contents
Seats ......................................................................................... 52
Seat Design and Function
Air Conditioning System ........................................................ 54
Dual-Zone and Four-Zone Climate Control Design,
Operation, Air Conditioner Module and Air Distribution,
Air Conditioning System Overview, Humidity Sensor
G355, Climate-Controlled Seats with Heating and
Ventilation Function, Front Air Conditioning System
Functional Diagram, Rear Air Conditioning System
Functional Diagram, Auxiliary Heater and Coolant
Additional Heater
Electrical System ..................................................................... 80
New Data Bus Systems Overview, New Data Bus
Systems, Wiring Harness Design, Convenience and
Security Electronics, Adaptive Cruise Control, Lighting
System, Infotainment
Knowledge Assessment ......................................................... 97
New!
Important/Note!
The Self-Study Program provides you with information
regarding designs and functions.
The Self-Study Program is not a Repair Manual.
For maintenance and repair work, always refer to the
current technical literature.
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Introduction
The New Audi Flagship
The new 2004 Audi A8L replaces its
predecessor which achieved a total
production figure of 105,092 units since its
introduction in June 1994. This was the first
standard sedan with an aluminum body and
epitomized a new philosophy in the luxury
vehicle sector.
The weight-saving Audi Space Frame
represented a major breakthrough in terms
of enhanced vehicle dynamics, while at the
same time solving the problem of
increasing vehicle mass.
This body concept was further perfected
in the Audi A2. The design of the 2004
Audi A8L reflects the experience gained
from both projects.
The aim when developing the 2004
Audi A8L was not merely to surpass its
predecessor in terms of technical features
and details.
As the Audi flagship, the new Audi A8L
establishes the product identity of the next
generation of Audis.
An uncompromising sporty character,
clear-cut design, innovative technological
systems, and the highest levels of quality
all combine to provide an unforgettable
driving experience.
SSP282/084
1
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