2017 AUDI A8 sensor

C) C0 ....
"' " "' .... 0 0 :r Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
Fig. 236 S id e airbag location in the driver's seat
N N
I
The side airbags are located in the sides of the
front seat backrests¢
fig. 236 and the rear back­
rest facing the doors. They are identified by the
word "AIRBAG".
The side airbag system basically consists of:
-the electronic control module and external side
im pact sensors
- the two side airbags located in the sides of the
front backrests
- two rear side airbags
- the a irbag warning light in the instrument clus-
ter .
The airbag system is monitored electronically to
make certain that it is functioning properly at all
times. Each time you sw itch on the ign ition, the
a ir bag system indicator light will come on for a
few seconds (self diag nostics).
The side airbag system supplements the safety belts and can help to reduce the risk of injury to
the dr iver's, front and rear passenger's upper tor­
so on the side of the vehicle that is struck in a
side coll is ion. The airbag deploys only i n side im­
pacts and only when the vehicle acceleration reg­
i stered by the control unit is high enough.
If this
r ate is below the reference value programmed in­
to the control unit, the side curtain ai rbag will
not be triggered, even though the car may be
badly damaged as a result of the collision. It is
not possible to define an airbag triggering range
that will cover every poss ible angle of impact,
Airbag system
since the circumstances will vary considerably be­
tween one collision and another. Important fac ­
tors include, for example, the nature (hard or
soft) of the impacting object, the angle of im­
pact, vehicle speed, etc. ¢
page 244, Important
safety instructions on the side airbag system .
Aside from their normal safety funct ion, safety
belts work to help keep the driver or front pas­
senger in position in the event of a side collision
so that the side airbags can provide protection.
The airbag system is
not a substitute for your
safety belt. Rather, it is part of the overall occu­
pant restraint system in your vehicle. Always re­
member that the side airbag system can only
help to protect you if you are wearing your safety
belt and wear ing it prope rly . This is another rea­
son why you should always wear your safety
belts, not just because the law requires you to do
so
¢ page 218, General information .
It is important to remember that while the sup­
plementa l side airbag system is designed to re­
duce the likelihood of ser ious injuries, other inju­
ries, for example, swelling, bruising, and minor
abrasions can also be associated with deployed
side airbags . Remember too, side airbags will de­
ploy only once and only in certain k inds of acci ­
dents - your safety belts are always there to offer
protection.
Veh icle damage, repair costs or even the lack of
vehicle damage are not necessar ily an ind ication
of over-sens itive or fa iled a irbag activation. In
some collisions, both front and side airbags may inflate . Remember too, that air bags w ill deploy
only once and only in certa in kinds o f collisions -
you r safety belts are always there to offer protec­
tion in those accidents in which airbags are not
supposed to deploy or when they have already
deployed.
The side airbag system will not deploy:
- when the ignition is switched off
- in side collisions when the acceleration meas-
ured by the sensor is too low
- in front-end collis ions
- in rear-end collisions
- in rollovers .
243

C) C0 ....
"' " "' .... 0 0 :r -Never use additiona l seat cushions that
cover the areas where the s ide airbags
deploy.
- Damage to the origina l seat covers or to
the seam in the area of the side airbag
module must always be repaired immedi­
ately by an authorized Audi dealer.
- Objects between you and the airbag can in­
crease the risk of injury in an accide nt by in­
terfering w ith the way the a irbag unfolds or
by being pushed into you as the a irbag in­
flates.
- Never p lace or attach accessories o r other
objects (such as cup holders, telephone
brackets, or even large, bu lky objects) on
the doors, over or near the area marked
"AIRBAG" on the seat backrests.
- Such objects and accessories can become
dangerous projectiles and cause injury
when the supplemental side airbag de­
ploys .
- Never carry any objects or pets in the de­
ployment space between them and the
ai rbags or allow ch ildren or other passen­
ge rs to travel in this posit ion.
- Always use the bui lt-in coat hooks only for
lightwe ight cloth ing . Neve r leave any heavy
o r sharp-e dged objects in the pockets th at
m ay interfere wit h side ai rbag dep loyment
and can cause pe rsonal injury in an accident .
- Always preven t the side airbags from be ing
d amaged by heavy objects knocking against
or hi tt ing the sides o f the seatbacks.
- T he airbag system can on ly be t rigge red
once . If the ai rbag has been triggere d, the
system must be replaced by an authorized
Audi dealership.
- Dama ge (cracks, deep scratches etc.) to the
original seat covers or to the seam i n the
area of the s ide airbag mod ule m ust always
be repaired immed iate ly by an authorized
Audi dealer.
- If children are seated improper ly, their risk
of injury increases in the case of an accident
i=> page 248, Child safety .
- Never attempt to modify any components of
the airbag system in any way .
Airb ag sys tem
-In a side coll ision, side airbags will not func­
tion properly if sensors cannot correctly
measure increasing air pressure inside the
doors when air escapes through larger, un­
closed openings in the door panel.
- Never dr ive with inte rior door trim panels
removed.
- Never dr ive when p arts have been re­
moved from the inside door pane l and the
openings they leave have not been proper­
ly closed .
- Never drive when loudspeakers in the doors have been removed unless the
speaker holes have been properly closed.
- Always make certain that open ings are
covered or filled if additional speakers or
other equipment is installed in the inside
door panels.
- Always have work on the doors done by an
authorized Aud i dea ler o r qualified work­
shop.
Side curtain airbags
Description of side curtain airbags
The side curtain airbag system can provide sup­
plemental protection to properly restrained oc­
cupants.
Fig . 238 Sid e curta in airbags, driver's side: side curtai n air­
bag locat io n
The side c urtain airbags are located on both sides
of the inter io r above the front and rear side w in­
dows
c> fig. 238. T hey are identified by the word
"A IRBAG" on the windshie ld frame and the cen-
ter roof pillar. .,..
245

Airbag syste m
The side curtain airbag system supplements the
safety belts and can he lp to reduce the risk of in­
jury for occupants' heads and upper torso on the side of the vehicle that is struck in a side colli­
sion . The side curtain airbag inflates in side im­
pacts and only when the vehicle acceleration reg ­
istered by the control unit is h igh enough . If this
rate is below the reference value p rogrammed in­
to the control un it, the side ai rbags wi ll not be
tr iggered, even though the car may be bad ly
damaged as a result of the collision. It is not pos­
sible to define an airbag triggering range that
will cover every poss ible ang le of impact, since
the circumstances will vary cons iderably between
one collision and another. Important factors in­
clude, for example , the nature (hard or soft) of
the impacting object, the angle of impact, vehicle
speed , etc.
c:> page 246, How side curtain air­
bags work .
Aside from their normal safety function, safety
belts work to help keep the driver or front pas ­
senger in pos it io n in the event of a collision so
that the side curtain airbags can provide protec­
tion .
The airbag system is not a substitute for your safety belt. Rather, it is part of the overall occu­
pant restraint system in your vehicle . Always re­
member that the airbag system can only help to
protect yo u if you are wea ring your safety belt
and wear ing it properly . T his is another reason
why you should always wear your safety belts, not just because the law requires you to do so
c:> page 218, General information.
I t is important to remember that whi le the s ide
curtain airbag system is designed to help reduce
the likelihood of serious injuries, other injuries,
for example, swe lling, bruising, and m inor abra­
sions can a lso be associated with these airbags
upon deployment. Remember too, these a irbags
w ill deploy only once and only in certa in kinds of
accide nts -your safety belts are a lways the re to
offer protection.
The side curtain airbag system basically
consists of:
- The electronic control module and external s ide
impact senso rs
246
- The side curtain a irbags above the front and
rear side windows
- The a irbag indi cator light in the instrument
panel
The airbag system is mon itored electro nical ly to
make certain it is func tioning properly at all
times. Each t ime you switch on the ignit ion, the
airbag system indicator light will come on for a
few seconds (self diagnostics) .
The side curtain airbag i s not activated:
- if the igni tion is switched off,
- in side collisions whe n the acceleration meas-
ured by the sensor is too low,
- in rear-end collisions .
A WARNING
-Safety belts and the airbag system will only
provide pro tect ion when occupants are in
t he prope r seating pos ition
c:> page 54,
Seats and storage.
- I f the a irbag ind icator light c:> page 23
comes when the veh icle is being used, have
the system inspected immediately by your
authorized Audi dealer . It is possib le that
the airbag will inflate when it is not sup­
posed to, or will not inflate when it should.
How side curtain airbags work
Side curtain airbags can work together with side
airbags to help reduce the risk of head and upper
torso injuries for occupants who are properly re­
strained.
F ig. 239 Illu strat io n of pr inc iple : In flated side curta in a ir-
bag s on the left s ide
II>

Child safety
Advanced Airbags and the weight-sensing mat in the front seat
The Advanced Airbag System in your vehicle de­
tects the presence of an infant or child in a child
restraint on the front passenger seat using the
weight -sensing mat in the seat cushion and the
sensor below the safety belt latch on the front
passenger seat that measures the tension on the
safety belt .
The weight-sensing mat measures total weight
of the child and the child safety seat and a child blanket on the front passenger seat . The weight
on the front passenger seat is related to the de­
sign of the child restraint and its "footprint ", the
size and shape of the bottom of the child re­
straint as it sits on the seat. The weight of a child
restraint and its "footprint" vary for different
kinds of child restraints and for the different
models of the same kind of child restraint of­
fered by child restraint manufacturers.
The weight ranges for the individual types,
makes and models of child restraints that the
NHTSA has specified in the Safety Standard to­
gether with the weight ranges of typical infants
and typical 1 year-old child have been stored in
the control unit of the Advanced Airbag System .
When a child restraint is being used on the front
passenger seat with a typical 1 year-old child, the
Advanced Airbag System compares the weight
measured by the weight sensing mat with the in­
formation stored in the electronic control unit.
The electronic control unit also registers the ten­
sion on the front passenger safety belt. The ten­
sion on the safety belt for the front passenger
seat will be different for an adult who is properly
using the safety belt as compared to the tension
on the belt when it is used to attach a child re­
straint to the seat. The sensor below the latch for
the safety belt for the front seat passenger
measures the tension on the belt. The input from
this sensor is then used with the weight to "de­
cide" , whether there is a child restraint with a
typical 1 year-old child on the front passenger
seat and whether or not the airbag must be
turned off.
250
· Child restraints and Advanced Airbags
Regardless of the child restraint that you use,
make sure that it has been certified to meet Safe­
ty Standards and has been certified by its manu­
facturer for use with an airbag. Always be sure
that the child restraint is properly installed at
one of the rear seating positions . If in exception­
al circumstances you must use it on the front passenger seat, carefully read all of the informa­
tion on child safety and Advanced Airbags and heed all of the applicable WARNINGS. Make cer­
tain that the child restraint is correctly recog­
nized by the weight-sensing mat inside the front
passenger seat, that the front passenger airbag
is turned off and that the airbag status is always
correctly signaled by the
PASSENGER AIR BAG
OFF
light.
Many types and models of child restraints have
been available over the years, new models are in­
troduced regularly incorporating new and im­
proved designs and older models are taken out of
production. Child restraints are not standardized.
Child restraints of the same type typically have
differen t weights and si zes and different 'foot­
prints,' the size and shape of the bottom of the
child restraint that sits on the seat, when they
are installed on a vehicle seat. These differences
make it virtually impossible to certify compliance
with the requirements for advanced airbags with
each and every child restraint that has ever been
sold in the past or will be sold over the course of
the useful life of your vehicle.
For this reason, the United States National High­
way Traffic Safety Administration has published a
list of specific type, makes and models of child
restraints that must be used to certify compli­
ance of the Advanced Airbag System in your vehi­
cle with the suppression requirements of Federal
Motor Vehicle Safety Standard 208. These child
restraints are:
Subpart A - Car bed child restraints
Model Manufactured on or
after
Angel Guard Angel September 25, 2007 Ride AA2403FOF

C) C0 ....
"' " "' .... 0 0 :r _& WARNING
Temperature grades apply to tires that are properly inflated and not over or underinflat­
ed .
Tire Pressure Monitoring
System (AS, S8)
(D General notes
A ppl ies to: AS, 58
Each t ire, including the spare (if provided),
should be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
veh icle manufact urer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure la­
be l, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your veh icle has been
equipped with a tire pressure monitoring system
(TPMS) that illuminates a low tire pressure te ll­
tale when one or more of your tires is significant­
ly under-inflated . Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi ­
cantly under-inflated tire causes the tire to over­
heat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop­
ping ability .
Please note that the TPMS is not a substitute for
p roper tire maintenance, and it is the driver's re­
sponsib ility to ma intain correc t tire p ressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres­
sure telltale.
Your veh icle has also bee n eq uipp ed w ith a TPM S
mal function indicator to indicate when the sys­
tem is not operat ing properly. The TPMS mal­
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one mi nute and then remain cont inuously
illuminated . This sequence will continue upon
Wheels
subsequent vehicle start-ups as long as the mal ­
function exists .
When the malfunction indicator is illuminated ,
the sys tem may not be able to detect or signal
low tire pressure as intended . TPMS malfunctions
may occur for a variety of reasons, including the
i nsta llation of replacement or alternate tires or
whee ls on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replac ing one or
more tires or wheels on your vehicle to ensure
that the replacement or a lternate tires and
whee ls allow the TPMS to continue to function
properly.
If the Tire Pressure Monitoring System
indicator appears
Applies to: A8, 58
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too low
or if there is a system malfunction.
Fig. 269 I n strument cluste r: indicator light with messa ge
Using the ABS sensors, the tire pressure monitor­
ing system compares the tire tread c ircumfer­
ence and vibration characteristics of the individu­
al tires.
If the press ure changes in one or more
tires, this is indicated in the instrument cluster
display with an indicator light
[I] and a message.
If only one tire is affected, the location of that
tire will be indicated.
T he tire press ures must be stored in the Infotain­
ment system again each time the pressures
change (switching between partial and full load
pressure) or after changing or replacing a tire on
your vehicle
c:> page 302. The tire pressure moni­
toring system only monitors the tire pressure you have stored . Refer to the t ire pressure label for ..,.
301

0 co .... N ,..._
N .... 0 0 :c ' As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure tell­
tale when one or more of your tires is significant­ ly under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a signifi­
cantly under-inflated tire causes the tire to over­
heat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop­
ping ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re­
sponsibility to maintain correct tire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres­
sure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the sys­
tem is not operating properly. The TPMS mal­
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal­
function exists .
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
Wheels
Description
App lies to : 58 plus
The tire pressure monitoring system monitors
the pressure in the four tires when driving .
The system uses sensors that measure the tem­
perature and pressure in the tires. The data is
sent from these sensors to the control module by
radio frequency.
The Tire Pressure Monitoring System shows the current pressures and temperatures of the tires
in the Infotainment system
o page 304. It also
compares the current tire pressures with the
stored tire pressures and gives a warning in the
driver information system if the tire pressure is
different from what is stored
o page 304.
The system does not detect if the stored tire
pressures match the recommended tire pres­
sures.
- Every time the tire pressures change, for exam-
ple when the load in the vehicle changes,
- after replacing a tire, or
- if wheels with new wheel sensors are used,
you must store the tire pressures again
opage 305.
A WARNING
--The tire pressure monitoring system assists
the driver in monitoring tire pressures. The
driver is responsible for having the tires in­
flated to the correct pressure.
- Do not change the tire pressure when the
temperature of the tire is high. This could
result in serious damage to the tire and
even cause the tire to burst, increasing the
risk of an accident.
- A tire with low pressure flexes more. This
heats the tire up too much. This could cause
the tread to separate and even cause the
tire to burst, increasing the risk of an acci­
dent.
- The Tire Pressure Monitoring System does
not warn you of damage or defects in the
tire construction that could cause the tire to
burst, for example. Inspect your tires regu­
larly.
303

Wheels
@ For the sake of the environment
Low tire pressure inc reases fuel consumption
and tire wear.
@ Tips
- The pressure of the spare tire * is not moni ­
tored.
- If t ires are re pla ced, the sensors/valves do
not need to be removed or rep laced . Ju st re­
placed the valve stem and, if necessary, the
valve and the wheel e lectron ics . If you have
quest ions, see your autho riz ed Aud i dea ler
or authorized Audi Service Facility.
Displaying tire pressures/temperatures
App lies to : 58 plus
Req uirement: the ign ition must be switched on .
.,. Select : the
ICARI function button > C ar s ystems
> Serv icing & checks > Tire pressure mon itor ­
ing
> Display tire pressures.
The current tire pressures are shown in green and
yellow numbers in the Infotainment system:
- Green : the current tire pressure and the speci­
fied tire pressure are approximately the same .
-Yellow: the c urrent tire press ure is too low
compared to the specified tire pressure.
The spe cified t ire press ure is the la st tire pres­
sure th at was s tored
c::> page 305.
No te that the tire pressure also depends on the
t emperature of the ti re . The ti re pressu re in­
creases as the engine becomes wa rmer wh ile
d riving.
& WARNING
R ea d and follow t he important information
and notes
c::> page 303 .
@ Tips
The tire pressure or tem per ature are not dis­
pl ayed in ada ptation mode. D ashe s·-.·- are
shown i n place of the press ure and tempera ­
ture .
304
-
Tire pressure loss
Applies to: 58 plus
Fig. 2 70 Dis pla y: ind icator light w it h a mess age
If the [I] ind icator light turns on, the pressure in
at least one tire is too low or new sensors were
not adapted:
RE indicator light s turn s on after turning the
ignition on
The tire pressure is too low compared to the
spec ified press ure .
.. Check and store the tire press ure(s) the next
time it is possible
c::> page 305.
RE indicator light turns on while dr iving
Wheels with new sensors we re not adapted or
the tire p ressure has reached a critica l level com­
pared to the specif ied pressure.
.. Avoid unnecessary s teering and brak ing maneu-
vers .
.. Adapt your driving sty le to the s ituation.
.. Stop as soon as possib le and check the tire(s).
.. If it is possib le to cont inue dr iv ing, see an au-
thorized Audi dealer or authorized Audi Service
Facility immediately and have your tire(s) re ­
pai red or rep laced .
& WARNING
Read and f ollow the impo rtant inform ation
and notes
c::>p age 303.
-

Storing new tire pressures
Applies to: S8 plus
Correctly stored tire pressure specifications are
necessary for reliable tire pressure monitoring .
.. Check the tire pressures in all wheels.
1> If necessary, correct the tire pressure according
to the spec ificat ions on the sticker on the driv ­
er's door ~
page 291 . Only correct the press ure
in tires whose tempera tu re is approx imately
the same as the amb ient temperature.
If the
tempera ture of the tire is highe r than the ambi­
ent a ir temperat ure, the tire pressure must be
increased approximately 3 PSI (0,2 bar) above
the va lue on the sticker.
.. Switch the ignition on.
.. Se lect :
I CARI funct ion button > Car systems >
T ire pr essure monitoring > Store tire pres­
s ure s.
After stor ing, the tire pressure mon itor ­
ing system measures the c urrent tire pressures
and stores them as the new specified p res­
s ur es .
.. If the changed tire press ures are not displayed
in t he Infotainment system, dr ive the veh icle
for approximate ly 10 minutes so that the sen ­
sor signal from the whee ls is received again .
During this adap tat ion phase, --,-- is disp layed
for pressure and temperature and the Tire Pres ­
sure Monitoring System is only partially availa­
b le: it only warns you if one or more of the tire
pressures is/are under the m inimum permitted
va lue. If this is the case, the
It] indicator light
appears w ith a message .
A WARNING
Read and follow the important information
and notes
~ page 303.
Malfunctions
Applies to: S8 plus
-
I f t he Tire Pressu re Monito ring System is not
av ail able,
the m ind icator light appe ars in the
driver informat ion system. The
HJ] indi cator light
o a lso blinks for approx imately one m inutes each co
~ time the ignition is switched on . The tire pressure ,.....
~ monitoring system cannot be selected in the In-o 0 :c ' Wh eel s
fota inment system. The following are examp les
of situations that cou ld cause a malfunction:
- I f the message appears at t he e nd of the adap­
t ation phase, the system cannot detec t the
wheels installed on the veh icle. This may result
from one or more whee ls being installed with­
out wheel senso rs or with incompatible whee l
sensors.
- A wheel sensor or another component has
fa iled.
- Using snow chains can affect the function of
the system beca use of the shielding effect of
the chains .
- The tire pressure monitoring system is not
avai lab le due to a ma lf u nction .
- Transmitters with the same frequency, such as
headphones or remote-cont rolled devices, may
cause a temporary system malfunct ion due to
the strong electromagnetic field.
The
fim indicator light t urns off once the Tire
Pressure Monitoring System is availab le aga in . If
you cannot correct the ma lf u nction and
the m
indicator light stays on, drive immediately to an
authorized Aud i dealer or a uthorized Audi Serv ice
Facility to have the malf unct ion repaired .
305