2016 AUDI TT ROADSTER sensor

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CX) Airbag
system
Description of airbag
system
General notes on airbag system
The airbag is an integral part of the car's passive
safety system.
In conjunction with the seat belts, the airbag sys­
tem gives the front occupants additional protec­
tion for the head and chest in the event of a se­
vere frontal collision.
In a severe side collision the side airbags reduce
the risk of injury to the occupants ¢,&..
In addition to their normal function of protecting
the occupants in a collision, the seat belts also
hold them in a position where the airbags can in­
flate properly and provide maximum protection.
The airbag system will only work with the igni­
tion on. The airbag system is monitored electron­
ically; the indicator lamp m indicates whether
the system is functioning properly.
The main parts of the airbag system are:
- The electronic monitoring system (control unit
and sensors)
- The two front airbags
- The two side airbags
- The indicator lamp El in the instrument cluster
There is a fault in the airbag system if the
warning lamp
- does not come on when the ignition is switched
on.
- does not go out about 4 seconds after the igni­
tion is switched on.
- goes out and then comes on again after the ig­
nition is switched on.
- comes on or flickers while the car is moving.
A WARNING
- The airbags are not a substitute for the seat
belts; they are an integral part of the car's
overall passive safety system. The airbags
can only offer effective protection if the oc­
cupants are wearing their seat belts. For Airbag
system
this reason it is very important to wear the
seat belts at all times ¢ page 230, Why is it
so important to use seat belts?.
- The seat belts and airbags can only provide
maximum protection if the occupants are
seated correctly ¢ page 54, Front seats.
- If you do not wear a seat belt, if you lean
forward, or are not seated correctly while
the vehicle is in motion, you are at greater
risk of injury should the airbag system be
triggered in an accident.
- Components of the airbag system are loca­
ted in various parts of the vehicle. If repairs
to other vehicle components make it neces­
sary to perform work on the airbag system
or to remove or install parts of the airbag
system, this may cause damage to the air­
bag system. As a result, the airbags may not
inflate correctly or may not be triggered at
all in an accident situation. For this reason,
you should always have the work carried out
by a qualified workshop.
- If a fault should occur in the airbag system,
have the system checked immediately by a
qualified workshop. Otherwise the system
may fail to trigger in an accident.
- Do not attempt to modify components of
the airbag system in any way.
- Never make any alterations to the front
bumper or the body.
- Do not remove the seats.
- The airbag system can only be activated
once; if the airbag has been triggered, the
system must be replaced. Should the airbag
system or airbag modules have to be re­
placed, the qualified workshop carrying out
the replacement will document all details.
- If any repair work is required or the airbag
and restraint systems have to be replaced,
have the work carried out by your authorised
Audi dealer or a qualified workshop which
adheres to the Audi factory standards. This
will minimise the risk of injury.
- If you sell the vehicle, remember to pass on
the complete Service Wallet to the new
owner. If any of the airbags have been deac­
tivated, it is important that the new owner
is also given the relevant documents.
..,.
235

Downloaded from www.Manualslib.com manuals search engine Airbag
system
- The relevant safety requirements must be
observed when the vehicle or components
of the airbag or belt tensioner systems are
scrapped.
- For safety reasons, the alternator and the
starter are both disconnected from the bat­
tery via a pyrotechnic circuit breaker in se­
vere accidents.
- Any repairs to the pyrotechnic circuit
breaker must always be performed by a
qualified workshop -risk of accident!
- The relevant safety requirements must be
observed when the vehicle or the circuit
breaker are scrapped.
When are the airbags triggered?
One or more airbag systems are triggered in se­
vere collisions, depending on the circumstances.
Factors determining the triggering response
It is not possible to define the exact triggering
response of the airbag system in all possible sit­
uations, since the circumstances in different
types of accident will vary considerably. Impor­
tant factors
include,
for example, the nature
(hard or soft) of the object which the car hits, the
angle of impact, vehicle speed and so on.
Whether the airbags are triggered depends pri­
marily on the vehicle deceleration rate resulting
from the collision. By processing the signals from
the sensors located in the vehicle, the electronic
control unit is immediately able to evaluate the
severity of the collision and activate the restraint
systems accordingly. If the deceleration rate is
below the predefined reference value in the con­
trol unit the airbags will not be triggered, even
though the accident may cause extensive damage
to the car. In these situations, the occupants are
protected by wearing the seat belts.
({D Note
The airbag may release a fine dust when it in­
flates. This is quite normal and does not
mean there is a fire in the vehicle.
1 1
Not available in all export vehicles.
236 Front
airbags
Important notes on passenger's airbag
A AIRBAG
t '�
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c:::::J
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ClO
ClO
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Fig. 197 Version 1, passenger's sun visor: Airbag sticker
AIRBAG
Fig. 198 Version 2, passenger's sun visor: Airbag sticker "'
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A sticker 1
>
with important information about the
passenger's airbag is provided on the passenger's
sun visor. Please refer to the safety notes in the
following chapters:
- Child seats and passenger's airbag c:::> page 223,
Safety notes for using child seats
- Safe distance from passenger's airbag
c:::> page 238, Important safety notes on the
front airbag system
- Objects between passenger and passenger's
airbag c:::> page 238, Important safety notes on
the front airbag system

Downloaded from www.Manualslib.com manuals search engine Airbag
system
¢ Fig. 206. Further airbag systems may also be
triggered, depending on the circumstances.
When the system is triggered, the airbag is filled
with propellant gas.
In order to provide the desired extra protection in
an accident, the airbags have to inflate extremely
rapidly (within fractions of a second).
The fully deployed airbags cushion the impact for
the occupants and help to reduce the risk of in­
jury to the upper part of the body on the side fac­
ing the door.
Important safety notes on the side airbag
system
Applies to: vehicles with side airbags
There are a number of safety points concerning
the airbag system which you should remember.
This will help to reduce the risk of injury in an ac­
cident.
A WARNING
- If you do not wear a seat belt, if you lean
forward, or are not seated correctly while
the vehicle is in motion, you are at greater
risk of injury should the side airbags be trig­
gered in an accident.
- If children are not seated correctly, they are
at greater risk of injury in an accident. This
could result in serious or potentially fatal in­
jury ¢page 223, Child seats.
- It is also important not to attach any acces­
sories (such as cup holders) to the doors.
This would impair the protection offered by
the side airbags.
- The sensors for the airbags are located in
the doors. You must therefore not make any
modifications to the doors or door trim (e.g.
retrofitting loudspeakers), as this could im­
pair the function of the side airbags. Any
damage to the doors could lead to faults in
the system. Repairs or any other work on
the doors must therefore always be carried
out by a qualified workshop.
- Do not apply excessive force to the sides of
the backrests (such as hard knocks or kicks),
as this could damage parts of the system.
240 The
side airbags could then fail to operate
when required.
- If you intend to fit protective covers over
the seats, these must be of the specific type
approved for use on Audi seats with side air­
bags. Conventional seat covers would ob­
struct the side airbag when it inflates out of
the backrest, and seriously reduce the air­
bag's effectiveness.
- Any damage to the original seat upholstery
or around the seams of the side airbag units
must be repaired immediately by a qualified
workshop.
- Any work involving the side airbag system or
removal and installation of the airbag com­
ponents for other repairs (such as repairs to
the seats) must always be performed by a
qualified workshop. Otherwise the airbag
system may fail to work properly.

Downloaded from www.Manualslib.com manuals search engine Wheels
... Check that the snow chains are correctly seated
after driving for a few yards; follow the instruc­
tions given by the manufacturer.
... Keep your speed below 50 km/h. Please ob-
serve the applicable local regulations.
For technical reasons snow chains may only be
used on tyres with certain wheel rim/tyre combi­
nations.
Rim size Rim offset Tyre size
7Jx17 47 mm 225/50
8Jx19 52
mm
225/40
You must remove the snow chains on roads which
are free of snow; otherwise the vehicle handling
may be impaired and the tyres may be damaged.
A WARNING
Unsuitable or incorrectly mounted snow
chains can cause you to lose control of the ve­
hicle -risk of accident!
CD CAUTION
- Snow chains can damage the rim/hubcap* if
they make direct contact with it. Remove
the hubcaps* beforehand. Use snow chains
which have a protective coating.
- If you use snow chains with links that pro­
trude more than 13.5 mm, this could cause
severe damage to the wheel housings and
other parts of the vehicle.
({D Note
When driving with snow chains, it may help to
switch on sport mode ¢ page 114.
Low-profile tyres
Applies to: vehicles with low-profile tyres
Your vehicle is fitted with low-profile tyres* as
standard equipment. Low-profile tyres have a
lower sidewall and provide a wider tread surface
and rim diameter than other wheel/tyre combi­
nations. This makes the car's handling more
agile. However, the ride may be less comfortable
on poor-quality roads and tracks, and rolling
noise may be louder.
258 Low-profile
tyres can be damaged more quickly
than standard tyres, for example by heavy jolts,
potholes, manhole covers, speed humps and
kerbs. It is therefore particularly important to
ensure that they are inflated to the correct pres­
sure c:>page 256.
Drive with particular care on poor-quality roads
to ensure that you do not damage the rims and
tyres.
Make sure to check your wheels regularly (every
3,000 km) for damage such as blisters/tears on
the tyre sidewalls or deformations/cracks on the
rims.
After a heavy jolt, or if any damage occurs, you
should have the rims and tyres checked and if
necessary replaced by a qualified workshop.
Tyre wear occurs more quickly on low-profile
tyres than on standard tyres.
Summer tyres are not suitable for cold condi­
tions, snow or ice. Use winter or all-season tyres
when driving in these conditions c:::> page 257.
Tyre pressure Loss
indicator
Tyre pressure loss indicator in instrument
cluster
Applies to: vehicles with tyre pressure loss indicator
The tyre pressure Loss indicator in the instrument
cluster informs the driver if the tyre pressure is
too Low or a system malfunction has occurred.
The tyre pressure loss indicator makes use of the
ABS sensors to compare the rolling circumfer­
ence and the vibration of the tyres. If changes in
the inflation pressure are detected on one or
more tyres, the driver is alerted by an indicator
lamp [tE and a message on the infotainment dis­
play. If only one tyre is affected, the display will
indicate its position.
Each time you change a tyre, change the wheels
round or change the tyre pressures on your vehi­
cle (e.g. when switching from partial load to full
load and vice-versa), you must store the new tyre
pressures on the infotainment system
c:::> page 259. Monitoring of the tyre pressures is
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Tyre pressure
monitoring system
General notes
Applies to: vehicles with tyre pressure monitoring system
The tyre pressure monitoring system keeps a
check on the tyre pressures of the four road
wheels while you are driving.
The system uses sensors to measure tempera­
tures and pressures in the tyres. The sensors
transmit the data to the control unit by radio.
The tyre pressure monitoring system displays the
current pressures and temperatures of the tyres
on the infotainment system while the vehicle is
moving ¢ page 260. In addition, it compares the
current tyre pressures with the stored tyre pres­
sures and warns you if it detects a discrepancy
¢page 261.
The system cannot check if the stored tyre pres­
sures correspond to the recommended tyre pres­
sures for your vehicle. You must store the new
tyre pressures ¢ page 261:
- after every adjustment to the tyre pressures,
e.g. after changing the laden weight of your ve­
hicle,
- after changing a wheel, or
- when using wheels with new wheel sensors.
.&_ WARNING
- The tyre pressure monitoring system helps
the driver to monitor the tyre pressures.
However, it is always the driver's responsi­
bility to ensure that the tyres are at the cor­
rect pressure.
- Never re-adjust the tyre inflation pressure
when the tyre is hot. This can cause serious
damage to the tyre or even a blow-out,
which could result in an accident.
- Under-inflated tyres flex more than they
should. This causes them to overheat. This
can cause tread separation and tyre blow­
out, which could result in an accident.
- The tyre pressure monitoring system cannot
warn you of tyre damage or defects that
could lead, for example, to a tyre blow-out.
Perform a regular visual check of your tyres.
260 (I))
Note
- The sensors and valves do not have to be de­
tached or changed round when fitting new
tyres. Only the valve core needs to be re­
placed, and if necessary the valve and the
electronic components in the wheel. Please
contact a qualified workshop if you have any
questions.
-After using the tyre repair kit, the tyre pres­
sure monitoring system may malfunction.
Have the sensors renewed by a qualified
workshop.
Displaying tyre pressures and temperatures
Applies to: vehicles with tyre pressure monitoring system
Important: The vehicle must be moving.
.. Select the following on the infotainment sys­
tem: !MENU! button> Servicing & checks >
Tyre pressure loss indicator > Display tyre
pressures.
The current tyre pressures are displayed in green,
yellow or red on the infotainment system:
- Green: The tyre pressure is roughly the same as
the reference value.
- Yellow: The tyre pressure is too low compared
with the reference value.
- Red: The tyre pressure is much too low com-
pared with the reference value.
The reference value is the last stored tyre pres­
sure value ¢ page 261.
Bear in mind that the tyre inflation pressure is al­
so influenced by the temperature of the tyre. The
tyre heats up while the vehicle is being driven
and the tyre pressure will rise accordingly.
.&_ WARNING
Please observe the important safety informa-
tion and notes ¢ page 260.
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Note
The tyre pressures and temperatures are not
shown in the display when the vehicle is sta­
tionary or during the initialisation phase. Hor­
izontal dashes--.--will appear instead of the
pressure and temperature figures.
(1) Loss of tyre pressure
Applies to: vehicles with tyre pressure monitoring system
If the indicator lamp RE appears, the tyre pres­
sure on at least one of the wheels is too low or
new sensors have not yet been initialised.
Indicator lamp [Bl lights up after switching
on the ignition
The tyre pressure is too low compared with the
reference value.
... Adjust the pressure of the relevant tyre(s) at
the next opportunity and store the pressures
¢page 261.
Indicator lamp [Bl lights up during a journey
Wheels with new sensors have not yet been ini­
tialised or the tyre pressure has reached a critical
level compared with the reference value.
... Avoid unnecessary braking and steering ma­
noeuvres.
... Adapt your driving style to the prevailing condi­
tions.
... As soon as you can do so safely, stop and check
the tyre(s).
... If it is possible to continue driving, you should
take the vehicle to a qualified workshop and
have the defective tyre(s) repaired or replaced
immediately.
A WARNING
Please observe the important safety informa­
tion and notes ¢page 260. Wheels
Storing new tyre pressures
Applies to: vehicles with tyre pressure monitoring system
To enable the tyre pressure monitoring system
to work reliably, it is important to store the cor­
rect pressure settings.
You should always store the tyre pressures if new
sensors are fitted or after changing the pressures
when carrying a different amount of passengers
or luggage.
... Before storing the new tyre pressures, check
that the current pressures on all four wheels
correspond to the specified values and adapt
the pressures to the current load ¢ page 256,
Fig. 222. Only adjust and store the inflation
pressure of the tyres when they are at approxi­
mately ambient temperature. If the tyre tem­
peratures are higher than the ambient temper­
ature, the inflation pressures should be in­
creased by approx. 0.2 bar above the pressures
specified on the tyre pressure sticker.
... Switch on the ignition.
... Select the following on the infotainment sys­
tem: I MENU I button > Servicing & checks >
Tyre pressure loss indicator > Store tyre pres­
sures > Yes, store now. The tyre pressure moni­
toring system will then measure the current
tyre pressures when you drive the vehicle and
store them as the new reference values .
... If the new tyre pressures do not appear on the
infotainment display, you will need to drive for
about 10 minutes so that the sensor signal
from the wheels can be received again .
During this initialisation phase,--.--will be
shown on the pressure and temperature display
and some functions of the tyre pressure monitor­
ing system will not be available. The system will
warn you only if the pressure of one or more tyres
is below the minimum reference pressure.
If the indicator lamp RE lights up and the mes­
sage Tyre pressure: wheel change detected.
Please check all tyres and store pressures in
MMI appears, the system has detected that the
sensor positions have changed because of a
wheel change or that new sensors have been fit-
ted. Store the new tyre pressures.
llll-
261

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A WARNING
Please observe the important safety informa­
tion and notes <=> page 260.
Possible malfunctions
Applies to: vehicles with tyre pressure monitoring system
If the tyre pressure monitoring system is inoper­
ative, the indicator lamp mm will appear in the
instrument cluster display together with the
message Tyre pressure: fault. See owner's man­
ual.
If the indicator lamp mm appears after you have
switched on the ignition or while you are driving
and the indicator lamp[I] flashes for approxi­
mately one minute and then remains lit, there is
a fault in the system. This fault can have the fol­
lowing causes:
- If the display appears at the end of the initiali­
sation process, this means that the system can­
not detect the wheel sensors required to moni­
tor the pressures. This can happen if one or
more of the tyres fitted does not have a sensor
or the sensors are incompatible.
- One of the wheel sensors or another compo­
nent may not be working.
- Snow chains interfere with the signals trans­
mitted by the sensors and can prevent the sys­
tem from functioning properly.
- The tyre pressure monitoring system may be in­
operative due to radio interference.
- Radio systems operating on the same frequen­
cy, such as radio headphones or two-way radios
inside the vehicle, produce strong electromag­
netic fields which cause temporary interfer­
ence.
The indicator lamp mm and the message will
disappear as soon as the tyre pressure monitor­
ing system is available again. If the fault persists
and the indicator lamp mm stays on, you should
drive to a qualified workshop and have the fault
rectified.
262

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CX) Care
of vehicle and
cleaning
General notes
Regular and careful care helps to maintain the
value of the vehicle. This may also be one of the
requirements for upholding any warranty claims
in the event of corrosion or paint defects.
Qualified workshops carry stocks of suitable car
care materials. Please follow the instructions for
use on the packaging.
A WARNING
- Cleaning products and other materials used
for car care can damage health if misused.
- Car care products can contain toxic substan­
ces and must always be kept in a safe place
out of reach of children.
@ For the sake of the environment
- Please choose care products that are not
harmful to the environment.
- Surplus cleaning materials should not be
disposed of together with ordinary house­
hold waste.
Washing the vehicle
The longer residues are allowed to remain on the
vehicle, the more damage they can do to the
paintwork. High temperatures (for instance in di­
rect sunlight) further intensify the damage.
Before washing, soak heavy dirt with plenty of
water.
Stubborn dirt, such as bird droppings or resinous
tree sap, is best removed with plenty of water
and a micro-fibre cloth.
After the period when salt is put on the roads,
have the underside of the vehicle washed thor­
oughly.
High-pressure cleaners
When cleaning the vehicle with a high-pressure
cleaner, always follow the operating instructions
for the equipment. This applies particularly to Care
of vehicle and cleaning
the operating pressure and the spraying dis­
tance. Do not point the spray jet directly at the
seals on the windows, doors, bonnet or boot lid,
or at the tyres, rubber hoses, insulating material,
sensors* or camera lenses*. Maintain a distance
of at least 40 cm.
Do not use a high-pressure cleaner to remove
snow and ice.
Never use high-pressure cleaners with a round­
jet nozzle or "dirt blasters".
The water must not be hotter than 60 °C.
Automatic car washes
Spray the vehicle with water before washing.
Ensure that the windows are closed and that the
windscreen wipers are switched off. Follow the
car wash operator's rules and recommendations,
especially if any accessories are attached to your
vehicle.
If possible use a brush less car wash.
Washing by hand
Clean the car with a soft sponge or brush, start­
ing on the roof and working down. Use solvent­
free cleaning agents.
Washing matt-painted vehicles by hand
To avoid damaging the paintwork when washing
the car, first remove any dust, sand and grit. In­
sects, grease stains and fingerprints are best re­
moved using a special cleaning agent for matt­
painted surfaces.
Apply the product with a micro-fibre cloth. Do
not apply too much pressure to avoid damaging
the paintwork.
Rinse the car thoroughly with water. Then clean
the car with a neutral shampoo and a soft micro­
fibre cloth.
Rinse the car with Lots of water again and then
let it dry in the air. Remove any water stains with
a chamois.
263