2011 AUDI S8 brake sensor

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Page 15 of 302

AUDI S8 2011 Owners Manual Instrument s and warnin g/indi cator ligh ts 13
Jj]
Electronic Stabilization Program
!I
Windshield wipers
(ESP)./ ¢page 21
¢ page 18
~
Remote control key
I
Electronic Stabilizat

Page 20 of 302

AUDI S8 2011 Owners Manual 18 Instruments and warning/indicator lights
There is a malfunction that can result in re
stricted driving stability.
Carefully drive at a maximum speed of 35
mph
(60 km/h) to

18 Instruments and warning/indicator lights
There is a malfunction that can result in re
stricted driving stability.
Carefully drive at a maximum speed of 35
mph
(60 km/h) to your authorized Audi dealer
or qualified workshop to have the malfunction
corrected.
• Air suspension: service mode. Vehicle
can only be moved with restrictions
Carefully drive to your authorized Audi dealer
or qualified workshop immediately to have
the service mode deactivated.
II Air suspension fault
There is a system malfunction that can result
in restricted driving stability or reduced
ground clearance.
Drive to your authorized Audi dealer immedi
ately to have the malfunction corrected.
II Air suspension: vehicle too low. Ground
clearance reduced
The ground clearance is very low due to a sys
tem malfunction. Wait until the air suspen
sion system has restored normal ground clear
ance. Otherwise, conditions such as an uneven
road surface can lead to vehicle damage.
~/ !f Safety systems
The fl (USA models)!EJ (Canada models) in
dicator light monitors the safety systems e.g.
airbags, pretensioners and illuminates for a
few seconds each time you switch the ignition
on.
If the
I (USA models);EI (Canada models)
indicator light does not go out, or if it illumi
nates while you are driving, or if it starts to
blink, then there is a malfunction somewhere
in the system . If the light does not illuminate
when you switch the ignition on, this also
means there is a malfunction.
A WARNING
If you have a malfunction in the safety sys
tems, contact your authorized Audi dealer
immediately. Otherwise the saftey sys- terns may not work
properly in an acci
dent.
f;.J [J. Electronic stabilization program
(ESP)
This warning/indicator light monitors the
electronic stabilization program.
When you switch the ignition on, the indicator light
G] turns on briefly to check the function.
If the
BJ indicator lamp blinks while driving,
the ESP or ASR (Anti-Slip Regulation) is active
ly regulating.
If the BJ indicator lamp illuminates, the sys
tem has switched the ESP off.
If the indicator light
I turns on, the ESP was
switched to ESP sport mode with the button
[!] c::> page 190. If this is case , you can reacti
vate the ESP by switching the ignition off and
then on again. The warning/indicator light
should go out to show that the system is fully
functional again.
ESP/ABS: fault! See owner's manual
If the indicator light DJ and the ABS indicator
light
m (USA models) ;ii] (Canada models)
turn on and the message appears, there is a
malfunction in the ABS system or electronic
differential lock. This also interrupts the ESP.
The brakes still function with their normal
power, but ABS is not active.
Drive to your authorized Audi dealer immedi
ately to have the malfunction corrected.
If the battery terminals were disconnected
and re-connected, the vehicle was jump start
ed or the battery is very weak, the ESP sensor
system goes through a learning process for
the first few yards. The warning/indicator
light illuminates. The warning/indicator light
goes out as soon as the learning process is
complete.
For more information about the ESP
c::> page 190.

Page 22 of 302

AUDI S8 2011 Owners Manual 20 Instruments and warning/indicator lights
&_ WARNING
Driving with bad brakes can cause a colli
sion and serious personal injury.
- If the warning light
II and the warning
ligh

20 Instruments and warning/indicator lights
&_ WARNING
Driving with bad brakes can cause a colli
sion and serious personal injury.
- If the warning light
II and the warning
light
- ll with the message Brake
pads!
comes on in the instrument cluster
display, immediately contact your au
thorized Audi dealer or qualified work
shop to have all brake pads checked or
replaced if necessary.
EPC Electronic power control
This warning/indicator light monitors the
electronic power control .
The~ warning/indicator light (Electronic
Power Control) illuminates when you switch
the ignition on as a function check.
(D Tips
-
If this warning/indicator light illuminates
while you are driving, then there is a mal
function in the engine electronics. Have
the malfunction corrected as soon as pos
sible by your authorized Audi dealer or
qualified repair facility.
O Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIL) is part
of the On-Board Diagnostic (080 II) system.
The symbol
f-@j lights up when the ignition is
switched on and will turn off after the engine has started and has settled at a constant idle
speed . This indicates that the MIL is working
properly.
The warning light illuminates when there is a
malfunction in the engine electronic system.
Contact your authorized Audi dealer and have
the malfunction corrected.
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
<::> page 220 .
For more information
c::> page 27.
1) - : USA mod els only
!7} Engine speed limitation
Applies to vehicles: with engine speed limitation
lfl Engine speed maximum XXXX RPM
The engine speed is automatically limited to
the speed displayed in the driver information
system. This protects the engine from over
heating.
The engine speed limitation deactivates once
the engine is no longer in the critical tempera
ture range and you have released the accelera
tor pedal once.
If the engine speed limitation was activated
by an engine control malfunction, the indica
tor light~ also turns on. Make sure that the
speed does not go above the speed displayed.
Drive to your authorized Audi dealer immedi
ately to have the malfunction corrected.
~"' Engine oil level
II Add oil, max. x qt (l). You may continue
driving
When the symbol II and driver message ap
pear, add the amount of oil appearing in the
display at the next opportunity
c::> page 22 7.
'"' Engine oil sensor
II Oil level! Sensor defective
If the symbol illuminates, contact your au
thorized Audi dealer and have the oil sensor inspected. Until you have this done , check the
oil level each time you refuel just to be on the
safe side
c::> page 22 7.
Bu Fuel level indicator
Ii Please refuel
If the indicator light turns on for the first
time and the message appears, there are about 4 gallons (15 liters) of fuel left in the
tank. Time to refuel
<::> page 219.
Ii Tank system malfunction! Contact dealer llll>

Page 88 of 302

AUDI S8 2011 Owners Manual 86 Adaptive cruise control and braking guard
Adaptive cruise control
and braking guard
Introduction
Applies to vehicles: with adaptive cruise co ntrol
The adaptive cruise control

86 Adaptive cruise control and braking guard
Adaptive cruise control
and braking guard
Introduction
Applies to vehicles: with adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regulating vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system . If the
system detects a moving vehicle up ahead,
adaptive cruise control can brake and then ac
celerate your vehicle. This helps to make driv
ing more comfortable both on long highway
stretches and in stop -and-go traffic.
Audi braking guard can warn you about an im pending collision with a vehicle up ahead that
is slower or has slowed down and start slow
ing your vehicle down with the brakes
<::> page 92.
Adaptive cruise control and Audi Braking
Guard have technical limitations that you
must know, so please read this section care
fully, understand how the system works and
use them properly at all times.
General information
General information
Applies to vehicles: with Adapt ive cruise contro l
Fig. 85 Front of th e ve hicle : senso rs a nd video camera
The areas that contain the radar and ultrason
ic sensors and the video camera
c::> fig . 85
must never be covered by stickers, or other
things or coated with dirt, insects, snow or ice
that will interfere with the Adaptive cruise
control system and Audi braking guard . Re
move snow with a hand brush and remove ice with a de-icing spray that does not contain
solvents.
The function of the Adaptive cruise control
system and Audi braking guard is limited un
der some conditions.
- Objects can only be detected when they are
within sensor range
c::> page 88, fig. 88 .
-The system has a limited ability to detect
objects that are a short distance ahead, off
to the side of your vehicle or moving into
your lane from the front or moves into your
lane from the side.
- When driving through curves
r=;> page 87.
-Some kinds of vehicles are hard to detect;
for examp le motorcycles, vehicles with high
ground clearance or overhanging loads mab
be detected when it is too late or they may
not be detected at all.
- Stationary objects
c::> page 87.
A WARNING
Improper use of the adaptive cruise con
trol can cause collisions, other accidents
and serious personal injury. -
-Never let the comfort and convenience
that adaptive cruise control and Audi
braking guard offer distract you from the
need to be alert to traffic conditions and
the need to remain in full control of your
vehicle at all times,
- Always remember that the adaptive
cru ise control and Audi braking guard
have lim its -they will not slow the vehi
cle down or maintain the set distance
when you drive towards an obstacle or
something on or near the road that is not
moving, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehi
cles or obstacles that are not moving can
trigger a collision warning and if con
firmed by the video camera, an acute col lision warning.
- Always remember that the adaptive
cruise control cannot detect a vehicle
that is driving towards you in your traffic
lane and that it cannot detect narrow
~

Page 89 of 302

AUDI S8 2011 Owners Manual Adaptive cruis e control and bra kin g guard
vehicles such as motorcycles and bicy
cles.
- The adaptive cruise control system can
not detect people, animals and cannot
detect

Adaptive cruis e control and bra kin g guard
vehicles such as motorcycles and bicy
cles.
- The adaptive cruise control system can
not detect people, animals and cannot
detect objects or traffic that crosses your
lane of travel.
- Never drive at speeds that are too fast for traffic, road and weather conditions.
- Never use adaptive cruise control when
you cannot drive safely at a steady speed, including on wind ing roads or
when road conditions are poor (for exam
ple, in construction sites, on ice , gravel,
in fog, heavy ra in or on wet roads that in
crease the risk of hydroplan ing).
- Never follow a veh icle so closely that you
cannot stop your vehicle safely. The
adaptive cruise cont ro l cannot slow or
brake the veh icle safely when you follow
another veh icle too closely. Always re
member that the automatic braking
function cannot bring the vehicle to a
sudden or emergency stop under these
condit ions.
- Never rest your foot on the acce lerator
pedal, especially when the adaptive
cruise control is being used. Pressure on
the accelerator w ill override the adaptive
cruise control braking function and pre
vent the brakes from being applied whe n
adaptive cruise cont ro l detects a situa
t io n when the brakes must be applied.
- Never use adaptive cruise control whe n
the radar sensors cannot accurately de
t ect vehicles moving in t raff ic. The rad ar
sensor's vision can be reduced by heavy
rain, ice, snow, heavy road spray and re
flect ions from guard rails, t unnel ent ran
ces, etc. These and simi lar conditions can
prevent vehicles from being accurately
detected and in some cases they may not
be detected at all .
- Always turn off adaptive cru ise contro l
when entering turn lanes, exit lanes and
constr uction zones or in similar sit ua
t ions because the vehicle will automati
ca lly accelerate to the sto red speed when
the roa d ahead is clear. -
To prevent unintended operation, a lways
sw itch ACC off when it is not being used .
(D Note
The sensors can be moved by impac ts or
damage to the bumper, wheel housing and underbody . Damage in these areas could
change the way the adaptive cru ise control
system and Aud i brak ing guard work to
gether . Have your authorized Audi deale r
check to make s ure that the adaptive
cruise control system is wor king p roperly if
your vehicle had a m ino r frontal impact or
was damaged in the area of the sensors.
In curves
Applies to vehicles: wi th adaptive cruise control
Fi g. 86 Exa mpl e: dri vin g into a curve
When dr iving into a curve¢ fig. 86 and out of
a curve, the adaptive c ruise control may react
to a vehicle in the next lane and app ly the
brakes . You c an override or preven t the brak
ing by pressing the accelerator pedal b riefly .
Stationary objects
Applies to vehicles: wit h adaptive cruise control
Fig. 87 E xam ple: object c hanging l anes a nd s tationa ry
o ~ect
~
8 7

Page 94 of 302

AUDI S8 2011 Owners Manual 92 Adaptive cruise control and braking guard
-Your standard settings are automatically
stored and assigned to the remote con
trol key being used .
Audi braking guard
Description

92 Adaptive cruise control and braking guard
-Your standard settings are automatically
stored and assigned to the remote con
trol key being used .
Audi braking guard
Description
Applies to vehicles: wit h adapt ive c ru ise control
Fig. 94 Instrument cluster: approach warn ing
Audi brak ing guard uses radar sensors and a
video camera . It is active at speeds above
about 6.2 mph (10 km/h) and also works
within system limits when adaptive cruise control is switched off.
On vehicles with aAdaptive cruise control and
Audi side assist (Audi pre sense plus), system
functions also engage when a co llision is im
minent
¢page 188.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud
denly or if your own veh icle is traveling at a
h igh speed and approaching a vehicle up
ahead that is moving more slowly. Audi brak
ing guard does not react if it cannot detect
the situation.
The system advises you of various kinds situa tions :
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If
the vehicle ahead brakes sharply, you will not be able to avoid a coll is ion. The ind icator
light
I i n the d isplay comes on. Take imme
diate action to avoid the coll is ion and in
crease the distance to the vehicle up ahead. -
The
approach warning is given when a de
tected vehicle up ahead in your lane is mov
ing much more slowly that you are or if it
brakes sharp ly. When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharp ly . The indicator
light
I and the symbol in the disp lay will
warn you about the danger
c:> fig. 94 . You
w ill also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Aud i braking guard w ill
intervene by braking and the message
braking
guard intervention
w ill appear.
- If a coll is ion is imminent, the system will
first provide an
acute warning by brak ing
sharply .
- If you do not react to the acute warning, Au
di braking guard will brake w ith increased
force in severa l stages to reduce the speed
in a possible collisio n. On ve hicles w ith
adaptive cruise contro l and Audi side assist
(Audi pre sense plus), the system can brake
with increasing force up to maximum decel
eration shortly before a sensed collision
¢ page 188.
- If
the Audi braking g uard senses that you
are not braking hard enough when a colli
sion is imminent, it can increase the braking
force.
Audi braking guard takes the driver's reaction
time into consideration in order to provide
timely warnings. The system reaction time de creases automatically in some situations, for
example when it detects accelerator pedal use
or steering input . The Audi braking guard in
tervent ion stops in certa in situations, for ex
amp le if you press the accelerato r pedal to
pass the vehicle moving ahead of you in your
lane.
Which functions can be controlled?
You can switch Audi braking guard and the
distance/approach warning on or off in the
M M I c:> page 93, Settings in the MMI.

Page 95 of 302

AUDI S8 2011 Owners Manual Adaptive cru ise co ntrol and b rakin g guar d 93
A WARNING ,~
The Audi braking guard is an assist system
and cannot prevent a collis ion by itself.
The driver must always intervene.

Adaptive cru ise co ntrol and b rakin g guar d 93
A WARNING ,~
The Audi braking guard is an assist system
and cannot prevent a collis ion by itself.
The driver must always intervene. The driv er is always responsible for braking at the
co rrect time.
- Always pay close attention to traffic,
even when the Aud i brak ing guard is
switched on. Be ready to intervene and
be ready to take complete control whe n
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles up ahead.
-Audi braking guard works within limits and wi ll not respond outside the system
limits, for examp le when approaching a
stopped vehicle or stationary obstacle
(end of a traff ic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the Audi braking guard works only
within defined detect ion and range limits
that may prevent the proper detection of
other vehicles.
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. moving vehicles up ahead may not
be promptly detected or may not be de
tected at al l.
- Reflective surfaces includ ing c rash ba rr i
ers or tunnel en trances may impair the
function of the radar sensor .
(D Tips
Innattention can cause collisions, other ac
cide nts and serious persona l injuries.
- You can stop the Audi b raking guard in
te rvention w ith increas ing braking force
by applying the brakes yourse lf or by a c
ce le rat ing rapidly.
- Audi braking guard error messages
¢page 93.
Settings in the MMI
App lies to vehicles : wi th adap tive c ruise contro l
.,. Select: !CAR ! function button> Car sy ste m s
cont ro l butto n > Driv er a ssist> Audi brak
ing gua rd .
S ys tem -
Switch Audi b raking guard On and
Off . When you switch the ign it ion on, the
message
Audi br aking guard off appears in
the instr ument cluster d isp lay if the system is
switched off.
E arly warning -The distance and approach
warnings in the d isplay can be switched
On/
Off.
(D Tips
- Yo ur settings are automatically stored
and assigned to the remote cont ro l key
being used at the times the settings are
made.
- If you switch the ESP to sport mode, A u
di braking guard switches off a utomati
cally
¢page 192.
Messages
App lies to vehicles : wi th adap tive c ruise control
ACC una vailable
ACC and braking guard: unavailabl e
The system cannot detect moving vehicles up
ahead co rrectly and is switched off . The sen
sors have been d isplaced or are not worki ng
proper ly. The Audi pre sense functions may a l
so be affected.
ACC: unavailabl e at this time. No sensor vi
s ion
ACC and b rak ing gu ide: una vailable at this
time . No s enso r vision
This message appears if the sensor view is ob
structed, for examp le by leaves, snow, heavy
spray or d irt . Clean the sensors¢
page 86,
fig. 85.
ACC: unav ailable at this time. Incline too
steep

Page 271 of 302

AUDI S8 2011 Owners Manual Fuse panel@ (brown)
No. Equ ipment
1 H eadlight contro l switch
I 2
Ignition lock (key identifica-
tion)
3
Rear door control mod ule
(drivers side)
5 Horn
6 Interior lights (head li

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