check engine AUDI ALLROAD 2000 Owner's Manual

---------------------CONTROLS AND
EQUIPMENT
General notes
• Vehicle heating is depend upon tne tem­
perature of the engine coolant -therefore,
your vehicle interior will warm uponly when
the engine has reached its operating tem­
perature.
When the ambient temperature is too low,
the fan only switches to high speed modes
when the coolant has reached a sufficiently
high temperature, or when the ® button
has been depressed.
• Keeping the air intake slots in front of the
windshield free from ice, snow and debris
helps to make sure that the climate control
system will work properly.
• When the air conditioner compressor is
on it reduces both the temperature and the
humid ity of the air inside the vehicle. This
prevents the windows from fogging up.
• The air conditioner works best with the
windows and power roof* closed. •
If the inside temperature is very high af­
ter the vehicle has been parked in the sun,
open windows and allow the hot air to es­
cape before switching on the air condi­
tioner.
• The dust and pollen filter will prevent
dust and pollen etc. in the outside air from
entering the car. Switch to air recirculation
to prevent unpleasant fumes from entering
the vehicle.
If water drips under the
vehicle ...
At high outside temperatures and humidity,
condensation may drip from the evaporator.
This is normal and does not indicate a leak.
If the airflow is not cool ...
• At low ambient temperatures the air con­
ditioner compressor switches off automati­
cally. The compressor cannot be switc hed
on again in this case, even by pressing the
AUTO button. •
The air conditioner may switch itself off
temporarily to ensure sufficient engine
cooling when the engine is running at full
load.
The air conditioner will also be switched off
temporarily in the kick-down function. See
page 109.
• Check the air conditioning fuse on the
fuse p imel -see page 27 4. Have it replaced,
if necessary.
• If you suspect that the air conditioner is
damaged, for instance after an accident,
switch to the ECON and have the system
examined immediately for leaks or other
damage.
167

VEHICLE OPERA
TION-----------------------
Operate your vehicle safely
The condition of the vehicle is es­
sential for driving safety.
Therefore, always be sure to observe the
following points before you drive off:
• Check lights and turn signals.
• Check fuel level.
• Adjust the mirrors.
• Make sure that all lights and all
windows are clean.
• Make sure the air Intake slot be­
tween the engine hood and the
windshield is free of leaves, snow
and ice.
• Check warning and indicator
lights when starting the engine.
For driving safety, always follow the speci­
fied maintenance intervals in your Mainte­
nance booklet -especially for changing
the brake fluid, see page 242.
Yo ur personal driving style and your
attitude affect driving safety to a
very great extent.
19 4 Therefore,
for your own safety:
• Wear your safety belts and wear
them properly, even if you're just
driving in the city or to the corner
store -see page 14.
• Make sure that all passengers are
wearing their safety belts properly,
even those sitting in the rear -
see page 14.
Passengers not wearing safety belts endan­
ger not only themselves in case of an acci­
dent, but also the driver and other passen­
gers.
• Make sure that children always sit
on the rear seat properly restrained
by a res traint system appropriate
for their size and age.
• Never transport a child in a rear­
facing child or infant seat on the
front passenger seat.
• Adjust your seat so that you can
easily reach all controls as far away
from the airbag as possible but no
closer than 10 in. (25 em) -
see page 76. •
The seating position is very im­
portant for the airbag performance
- see page 29.
• Always adjust the head restra ints
to the correct height.
For maximum protection, the upper edge of
the head restraints should be at least at
eye level, or higher .
• Always make sure that the move­
ment of the pedals is not restricted
In any way-see page 102.
• Store luggage and light items
properly
in the luggage compartment ­
see page 88.
of the roof - see page 191.
• If you drink, do not drive.
The use of alcohol, drugs and certain medi­
cations will seriously impair perception,
reactions and driving ability, and substan­
tially increase the risk of an accident and
personal injury.

VE
HICLE OPERATION------------------------
The external conditions
in which you drive also affect your fuel con­
sumption.
The following conditions increase fuel con­
sumption:
• Heavy traffic, especially in large cities
with many traffic lights.
• Stop-and-go driving, especially short dis­
tances so that the engine never warms up
as it should.
• Driving in heavy, slow moving traffic in
low gear so that the engine speed is rela­
tively high when compared to the distance
driven.
� Plan your trips ahaad of time. Or­
� ganizs your trips to include sev­
sral errands and to avoid heavy traf­
fi c.
Of course, there are some conditions that
will affect fuel consumption that you can't
control.
For example, fuel consumption increases in
the winter or under difficult conditions (bad
roads, towing a trailer, etc.).
19 6 The
technical requirements
for optimum fuel consumption and eco­
nomy were ''built" intoyourvehicle. Special
attention was paid to the environment. To
reta in and make use of these characteris­
tics, please note the following points:
riJ Use only unleaded gasoline.
Leaded gasoline causes damage to the cat­
alytic converter and other components of
the emission system.
t:Gh Have your vehicle serviced by an
� Audi Dealar at the specified in­
tervals -see page 228 and your
Main tenance booklet.
Having your vehicle regularly serviced by an
Audi Dealer helps ensure that it runs prop­
erly and economical ly, that it does not dis­
turb the environment, and that it has a long
service life. t:Gh
Check
your tire pressure once a
W month.
Low tire pressure increases fuel consump­
tion and tire wear, and impair s vehicle han­
dling.
�W ARNING
Underinflation and overloading of
tires can lead to tire failure. Sud­
den failur e on the road could cause
a serious or fata l accident. See
page 253 for inflation informa­
tion.
� Do not carry unnecessary items
in the luggage compartment.
Particularly in city traffic where you must
often accelerate, weight influences fuel
consumption.

----------------------VEHICLE
OPERATION
,:lib Remove
supplementary roof
� rack components when not In
use.
At high road speeds, the increased air �e­
sistance caused by the cross bars also In­
creases fuel consumption.
,:lib Switch oH any electrical equip­
� ment when no longer needed.
The more electricity you consume, the
higher the fuel consumption.
,:lib Check your vehicle 's fuel co?­'l!�Sr sumption regularly. Keep a writ­
ten record or use the trip odometer .
Check your fuel consumption ea?h time you
refu el. By doing this, you can d1scov �r a �y
inc onsistencies which could result 1n In­
creased fuel consumption and have these
checked before other problems appear. •
Check your oil each time you fill
your tank
The amount of oil used is related to engine
load and speed.
It is normal for the oil consumption of a new
engine to reach its lowest value after a cer­
tain mileage has been driven.
You must drive your vehicle about 3,000
miles (5 000 kilome tres) before you can
properly assess oil consumption.
This also applies to fuel consumption and
engine output.
• The published ENVIRONME NTAL
PROTECTION AGENCY (EPA) and
Tr ansport Canada consumption esti­
mates may not correspond to your
actual consumption on the road.
which will vary depending upon ve­
hicle load and speed. road and
weather conditions. trip length. etc. The
catalytic converter is an efficient
"clean-up" device built into the exhaust
system of the vehicle. The catalyttc convert­
er burns many of the pollutants in the ex­
haust gas before they are released into the
atmosphere.
The exclusive use of unleaded fuel is
critically important fo.r the life of
the catalytic converter and proper
functioning of the engine - see
page 225.
The catalytic converter will be per­
manently damaged by:
• Exc eeding the correct engine oil
level - see page 236;
• Driving until the fuel tank be­
comes completely empty. The en­
gine could misfire. Unburned fuel
could also get into the exhaust sys­
tem and this could cause the catalyt­
ic converter to overheat;
197

Braking
General notes
• The brakes on today's automobiles are
still subject to wear, depending largely on
operating conditions and driving habits. On
vehicles which are driven mostly in stop­
an d-go city traffic or which are driven hard,
the brake pads should be checked by your
authorized Audi Dealer more often than
specified in the Maintenance booklet.
• On steep slopes, you should use the
braking effect of the engine. This way, you
prevent unnecessary wear to the brake sys­
tem. If you must use your brakes, do not
hold the brakes down continu ously. Pump
the brakes at interv als.
• Under certain conditions, for example,
when driving through water or very heavy
rain, or even after washing your vehicle, the
braking effect can be reduced due to the
wet brake pads or pads which are iced-up in
the winter. A few cautious brake applica­
tions should dry off the brake pads or re­
move ice coati ngs. The
effect iveness of the brakes can be re­
duced when the vehicle is driven on a salt­
covered road and the brakes are not used.
Clean off accumulated salt coating from
brake discs and pads with a few cautious
brake applications.
�W ARNING
• If you damage the front spoiler,
or if you install a different spoiler,
be sure the air flow to the front
brakes is not obstructed, other­
wise the brake system could over­
heat reducing the effectiveness of
the entire brake aystem.
• Failure of one brake circuit will
impair the braking capability re­
sulting in an increased stopping
distance.
Avo id driving the vehicle and have
it towed to the nearest authorized
Audi Dealer or qualified work­
shop. VEH
ICLE OPERATION
Brake booster
�W ARNING
• The brake booster works with
vacuum pressure which is created
only when the engine is running.
Never let the vehicle roll to a stop
with the angina shut off.
• If the brake booster is not work­
ing, for example when towing your
vehicle, or because the brake boo­
ster has somehow been damaged,
the brake pedal must be pressed
harder to make up for the lack of
booster assistance.
201

VE
HICL E OPER ATION------------------------
Functioning of Anti-Lock Brake
System (ABS)
The ABS contributes effectively to vehicle
control since it prevents the wheels from
locking when the brakes are applied. This
means that the vehicle remains steerable
and is less likely to skid.
Nota
Yo u don't have to "pump" the brake.
Just hold the brake pedal down.
However, do not expect that the ABS short­
ens braking distance under all circum­
stances. When driving on gravel or on newly
fallen snow on top of icy surfaces, braking
distance may be even longer , therefore, un­
der these circumstances, it is especially im­
portant that you drive slowly and with great
care.
202 How the
ABS system works
An automatic check is made when a speed
of about 4 mph (6 km/h) is reached.
When this happens a pumping noise can be
heard.
If an individual wheel begins to rotate too
slowly in relation to vehicle speed and tends
to lock, the ABS automatically reduces
brake pressure to prevent that wheel from
locking.
This automatic adjustment process
will cause a slight vibration of the
brake pedal and soma noises to alert
you that vehicle speed must be
adapted to existing road and traffic
conditions. Enhanced
ABS function {Offroad­
Mode)
To improve braking on loose terrain (for ex­
ample: gravel, scree, mud, slush, snow),
turn off the ESP (see page 205), which will
switch the ABS to a special mode designed
for off-road requirements.
In this mode, the ABS control system is
changed to allow a "wedge" of loose rock
or soil to form in the front of the wheels.
This improves braking performance.
The ESP indicator light in the instrument
cluster will come on when you have
switched to this special ABS mode (see
page 124).
This special ABS mode will remain active up
to about 40 mph (60 km/h). ABS operation
is not affected at speeds over 40 mph
(60 km/h).
To turn his special ABS mode off, press the
ESP button (To activate ESP, see page 152).
The ABS off-road mode will also be deacti­
vated when vou turn off the engine.

VEHICLE OPERA
TION-----------------------
Trailer towing
Yo ur Audi was designed primarily for pas­
senger transportat ion. The additional load
will affect durability, economy and perfor­
mance.
Tra iler towing not only places more stress
on the vehicle, it also calls for more con­
centration from the driver.
For this reasons, always follow the opera­
ting and driving instructions given and use
common sense.
208 Te
chnical requirements
Tr ailer hitch
Use a weight-carrying hitch conforming to
the gross trailer weight. The hitch must be
suitable for your vehicle and trailer and
securely bolted to appropriate place on the
vehicle's chassis. Use only a trailer hitch
with removable ball mount. Always check
with the trailer hitch manufacturer to make
sure that you are using the correct hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way
that it does not interfere with the impact-ab­
sorbing bumper system. No modifications
should be made to the vehicle exhaust and
brake systems. From time to time, check
that all hitch mounting bolts remain secure­
ly fastened. When
you are not towing a trailer, remove
the trailer hitch ball mount. This prevents
the hitch from causing damage should your
vehicle be struck from behind.
�W ARNING
When you are no longer towing a
trailer, remove the entire trailer
hitch. When doing so, seal all bolt
holes to prevent water and deadly
exhaust fumes from entering the
vehicle.
Engine cooling system
To wing a tr ailer make the engine work hard­
er. It is important that the engine cooling
system be up to the job. Make sure that the
cooling system has enough fluid.

---------------------------------------------------VEHICLE CARE
If in doubt about any servicing, nave 1t done
by your authorized Audi Dealer or any other
properly equipped and qualif ied workshop.
We strongly urge you_ to give your autho­
rized Audi Dealer the opportunity to perform
all scheduled maintenance and necessary
repairs. Your dealer has the facilities, origi­
nal parts and trained specialists to keep your
vehicle running properly.
Perf orming limited maintenance
yourself
The following pages describe a limited num­
ber of procedures which can be performed
on your vehicle with ordinary tools, should
the need arise and trained personnel be un­
available. Before perform ing any of these
procedures, always thoroughly read all of
the applicable text and carefully follow the
instructions given. Always rigorously ob­
serve the WA RNINGS provided. �W
ARNING
• Serious personal injury may oc­
cur as a result of improperly per­
formed maintenance, adjustments
or repairs.
• Be extremely careful when
working on the vehicle. Follow
commonly accepted safety prac­
tices and good judgment. Never
risk personal injury.
• Do not attempt any of the main­
tenance, checks or repairs de­
scribed on the following pages if
you are not fully familiar with
these or other procedures with re­
spect to the vehicle, or are uncer­
tain how to proceed. Do not do any
work without the proper tools and
equipment. Have the necessary
work done by your authorized
Audi Dealer or another properly
equipped and qualified workshop. '4
WARNING continued
• The engine compartment of any
motor vehicle is a potent ially haz­
ardous area.
• Always support your vehicle
with safety stands if it is neces­
sary to work underneath the ve­
hicle. The jack supplied with the
vehicle is not adequate for this
purpose and could collapse caus­
ing serious personal injury.
• Never reach into the area
around or touch the radiator fan.
The auxiliary fan is temperature
controlled and can switch on sud­
denly.
Always heed all WAR NINGS
on next page.
229

Engine
hood
To unlock the engine hood, pull the re­
lease lever on the left under the dashboard.
The hood pops up slightly under spring pres­
sure.
Note
Before opening the engine hood,
make sure that the windshield wip­
ers are folded flat against the wind­
shield. Otherwise, they could dam­
age the paint on the hood. To
open, pull the release lever in the direc­
tion indicated by the arrow. This will release
the hook under the hood.
Open the hood all the way. It will be held up
by gas pressure in the strut. VEH
ICLE CARE
To close
Pull the hood down until the pressure from
the strut is reduced. Then Jet the hood fall
and latch in place -you do not need to
press the hood down again.
m WARNING
• A hood that is not 'completely
latched could fly up and block
your view while driving. When you
close the engine hood, check it to
make sure the safety catch has
properly engaged. The hood
should be flush with the surround­
ing vehicle body parts.
• If you ever notice while driving
that the hood is not secured prop­
erly, stop at once and close it.
Always heed all WA RNINGS
on next page.
231

VEH
ICLE CARE---------------------------------------------------
Engine compartment
�W ARNING
To help avoid injury, before you
check anything under the hood:
• Switch off the engine. Remove
the ignition key.
• Set the parking brake fully.
Move the selector lever toP (Park).
• Always let the engine cool
down. Hot components will burn
skin on contact.
• Never spill fluids on hot engine
components. They can cause a
fire.
• Never touch the radiator fan.
The auxiliary electric fan can
switch on suddenly and injure you.
232 r4
WARNING continued
• If work on the fuel system or the
electrical system is necessary:
- Always disconnect the battery.
Never smoke or work near heat­
ers or open flames. Fluids in the
engine compartment could start
a fire.
Keep an approved fire extin­
guisher immediately available.
• To avoid electrical shock and
personal injury while the engine is
running or being started, never
touch:
- Ignition cables
- Other components of the high
voltage electronic ignition system. M
WARNING continued
• If you must perform a check or
repair with the engine running:
First, fully apply the parking
brake, move selector lever to
P (Park).
Always use extreme caution to
prevent clothing, jewelry, or
long hair from getting caught in
the radiator fan, V-belts or other
moving parts, or from contact­
ing hot parts. Tie back hair be­
fore starting, and wear no cloth­
ing that will hang or droop into
the engine.