2014 AUDI TT COUPE sensor

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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 side collision the side airbags reduce the risk
of injury to the areas of the body facing the im­
pact ¢_&.
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 airbag warning lamp 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 warning 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- Airbag system
cupants are wearing their seat belts. For
this reason it is very important to wear the
seat belts at all times ¢ page 204, 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 46, Seats and stor­
age.
- If you do not wear a seat belt, if you lean
for ward, 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 front 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 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.
- The relevant safety requirements must be
observed when the vehicle or components
of the airbag or belt tensioner systems are
scrapped.
209

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system
- 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.
The airbag system is not triggered in minor colli­
sions, or in rear collisions, or if the car overturns.
In these situations, the occupants are protected
by wearing the seat belts.
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
(ha rd 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.
([J) Note
The airbag releases a fine dust when it in­
flates. This is quite normal and does not
mean there is a fire in the vehicle.
l l
Not available in all export vehicles.
210 Front
airbags
Important notes on front passenger's
airbag
A AIRBAG
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Fig. 193 Front passenger's sun visor: Airbag sticker
A sticker 1
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with important information about the
front passenger's airbag is provided on the front
passenger's sun visor. Please refer to the safety
notes in the following chapters:
- Child seats and front passenger's airbag
¢ page 195, Safety notes for using child seats
- Safe distance from front passenger's airbag
¢ page 213, Important safety notes on the
front airbag system
- Objects between front passenger and front pas­
senger's airbag c:::>page 213, Important safety
notes on the front airbag system

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system
Side airbags
Description of side airbags
Applies to vehicles: with side airbags
The airbag system is not a substitute for the seat
belts.
Fig. 200 Location of side airbag in driver's seat
The side airbags are located in the backrest pad­
ding of the front seats¢ Fig. 200. The locations
of the airbags are marked with the word "AIR­
BAG".
In conjunction with the seat belts, the side air­
bags give the occupants additional protection for
the whole upper part of the body (i.e. the chest,
stomach and pelvis) in the event of a severe side
collision ¢&. in Important safety notes on the
side airbag system on page 214.
In a side collision the side airbags reduce the risk
of injury to the areas of the body facing the im­
pact.
How the side airbags work
Applies to vehicles: with side airbags
When fully inflated, the side airbags reduce the
risk of injuries to the upper part of the body.
Fig. 201 Side airbag in inflated condition
214 In
certain types of side collision, the side airbag
is triggered on the impact side of the vehicle
¢ Fig. 201. 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 airbag
releases a fine dust when it inflates. This is quite
normal and does not mean there is a fire in the
vehicle.
When fully deployed, the airbags cushion the im­
pact for the occupants and help to reduce the risk
of injury to the whole upper part of the body (i.e.
the chest, stomach and pelvis) on the side facing
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
is particularly the case if the child is travel­
ling on the front passenger's seat and the
airbag system is triggered in an accident.
This could result in serious or potentially fa­
tal injury ¢page 195, 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 front doors. You must therefore not
make any modifications to the doors or door
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system
an occupant strikes parts of the interior or ob­
jects outside the vehicle with their head. By re­
ducing the head impact and restraining uncon­
trolled movement of the head, the airbag also
reduces the forces acting on the neck.
The front airbags, side airbags and head-protec­
tion airbags may be triggered together in certain
types of accident.
In order to provide the desired extra protection in
an accident, the airbags have to inflate extremely
rapidly (within fractions of a second). The airbag
releases a fine dust when it inflates. This is quite
normal and does not mean there is a fire in the
vehicle.
Important safety notes on the head­
protection airbags
Applies to vehicles: with head-protection 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
- It is important to ensure that the area
around the openings for the head-protec­
tion airbags remains unobstructed at all
times, so that the airbags can inflate prop­
erly if needed.
- The built-in coat hooks should only be used
for lightweight clothing. Do not leave any
heavy or sharp-edged objects in the pockets.
When using the coat hooks, do not hang the
clothes on coat hangers.
- The space between the passengers and the
head-protection airbags must never be oc­
cupied by children, other passengers or
pets. Passengers should never lean out or
put a hand or arm out of the window while
the vehicle is in motion.
- Do not move the sun visors out to cover the
side windows if there is anything attached
to them (such as pens or a remote control
for the garage door). These objects could
cause injury if the head-protection airbag is
triggered.
216 -
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.
- If unsuitable accessories are installed near
the head-protection airbag, the protection
afforded by the airbag can be seriously im­
paired if the system is triggered. When the
head-protection airbag opens, parts of
these accessories could be thrown into the
vehicle and injure passengers ¢ page 260.
- Any work involving the head-protection air­
bags, or removal and installation of the air­
bag components for other repairs (such as
repairs to the roof liner), must always be
performed by a qualified workshop. Other­
wise the airbag system may fail to work
properly.

Downloaded from www.Manualslib.com manuals search engine Wheels
and tyres
tread pattern), summer tyres give less grip on ice
and snow.
... Winter tyres must be fitted on all four wheels.
... Only use winter tyres of the correct type ap-
proved for your vehicle.
... Please
note that the maximum permissible
speed for winter tyres may be lower than for
summer tyres¢.&_ . Your specialist retailer can
advise you of the maximum speed for your
tyres.
... After fitting the wheels you must always check
the tyre pressures ¢page 233.
Winter tyres lose their effectiveness when the
tread is worn down to a depth of 4 mm. The per­
formance of winter tyres is also severely impaired
by ageing, even if the tread is still much deeper
than 4 mm.
.&_ WARNING
- Never exceed the maximum approved speed
for your tyres. This causes the tyres to over­
heat and can even result in a blow-out -risk
of accident!
- Always adapt your driving style to the pre­
vailing road and traffic conditions. Drive
carefully and reduce your speed on icy or
slippery roads. Even winter tyres lose their
grip on black ice.
@) For the sake of the environment
Summer tyres should be fitted again as soon
as possible; they give better handling on
roads which are free of snow and ice. They are
quieter, do not wear so quickly and reduce
fuel consumption.
(Qj) Note
All-weather tyres can also be used instead of
winter tyres. Please note that winter tyres
with the & symbol are required by law during
the winter season in some countries.
Snow chains
Snow chains will improve braking ability as well
as traction in winter conditions.
234 ...
Snow chains can be used on the front wheels
only. This also applies to vehicles with four­
wheel drive* .
... 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 47mm 225/50
Only use snow chains with fine-pitch links. The
links must not protrude more than 13.5 mm
from the tyres (including tensioner).
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.
.&_ 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.
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
..,.

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with the ignition switched on - risk
of accident!
- To avoid cutting yourself on sharp metal
parts, always wear suitable protection when
cleaning the underside of the car or inside
the wheel arches.
- After the car has been washed, the full brak­
ing effect can be delayed by moisture (or in
winter by ice) on the discs and brake pads -
risk of accident! The brakes should be dried
by pressing the pedal to restore full braking
effect.
CD CAUTION
- Before washing the vehicle in an automatic
car wash, please make sure to retract the
exterior mirrors and, if necessary, retract
the automatic rear spoiler* to prevent dam­
age. Always use the electrical power control
to fold the mirrors in/out on vehicles with
electrically retractable exterior mirrors*.
Notes on cleaning and care
For cleaning and care of individual components
on the vehicle, please refer to the tables below.
These are recommendations only. If you have
Cleaning the exterior
Component Situation Care
of vehicle and cleaning
- Do not wash the vehicle in direct sunlight -
otherwise the paint can be damaged.
- Do not use insect sponges or abrasive
household sponges, etc. -they can damage
the surfaces.
- Matt-painted vehicle parts:
- Do not use polish or wax -otherwise the
paintwork can be damaged.
- Never use car-wash programmes that in­
clude wax coatings. This could spoil the
matt finish.
- Do not attach any stickers or magnet la­
bels to matt-painted parts as these could
damage the paintwork when they are re­
moved.
@ For
the sake of the environment
The car should only be washed in special wash
bays. This prevents oily water from getting in­
to the public drains.
special questions or certain components are not
listed, please ask your qualified workshop. Please
also refer to the notes ¢ &. .
Remedy
Wiper blades Di
rt/deposits
¢page43
Headlights/ Di rt/deposits Soft
sponge with mild detergent a
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rear lights
Sensors Dirt/deposits
Soft
cloth with solvent-free cleaning agent
Snow/ice Small brush/solvent-free de-icer spray
Wheels Road
salt Water
Brake dust
Acid-free cleaning agent
Tailpipes Road
salt Water; suitable stainless steel cleaning product if necessa-
ry
Ornamental trim/ Dirt/deposits
Mild detergent a
>
; suitable stainless steel cleaning product
mouldings if necessary
237

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WARNING
Never attempt to repair a fuse or replace a
blown fuse by fitting a fuse with a higher am­
pere rating. This could damage the electrical
system -risk of fire!
CD CAUTION
If a newly replaced fuse blows again after a
short time, the electrical system must be
checked by a qualified workshop as soon as
possible.
@ Note
- Unassigned fuse locations are not shown in
the tables below.
- Some of the items of equipment listed in
the tables below are only fitted on certain
models or are optional extras.
Fuses in vehicle interior
Fig. 246 Interior: Fuse layout
No. Electrical
equipment
F3 ESC
control unit
F4 Central computer (MIB-2)
FS Gateway No.
F6
F7
F8 F9
FlO Fll
F12
F13
F14
FlS
F16
F17
F18
Fl9
F20
F23
F25
F26
F28
F29
F31
F32 F33
F34
F35
F36 F37
F38 F39 Fuses
and bulbs
Electrical equipment
Anti-theft alarm system
Air conditioner console, selector lever (au-
tomatic gearbox), auxiliary heating, relay
coil for rear window heating
Diagnostics, switch for electronic parking
brake, light switch, rain/light sensor, inte-
rior lighting
Steering column switch module
Display
Haldex coupling
MMI system
Control unit for suspension control
Air conditioner blower
Electric steering column lock
MMI system
Instrument cluster
Reversing camera
Control unit for convenience key system
Electric lumbar support adjuster
Exterior lighting (right side), on-board
computer (right side)
Door/s, driver's side (e.g. electric windows)
Seat heating
Media socket for AMI High
On-board computer
On-board computer (left side)
Driver assistance systems
Airbag Electrical socket relay, interior sound, re-
versing light switch, temperature sensor,
oil level sensor
Diagnostics, headlight range control, air
quality sensor, automatic anti-dazzle mir-
rors
Corn ering light (right side)/ LED headlight
(right side)
Cornering light (left side) / LED headlight
(left side)
Engine control unit, ESC control unit
Door(s), passenger's side (e.g. electric win-
dows)
255

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and bulbs
No. Electrical
equipment
F40 Cigarette lighter, electrical sockets
F41 SCR relay and delivery unit
F42 Central locking system
F43 On-board computer
F45 Electrically
adjustable seat (driver's side)
F49 Starter, clutch sensor
FSO ESC
valves
F53 Rear window heating
Th e seats with electric adjustment* are protected
by circuit breakers. These reset automatically af­
ter a few seconds when the overload has been
corrected.
Fuses on left side of engine compartment
Fig. 247 Engine compartment: Fuse la
yout
No. Electrical
equipment
F3 Engine control unit (petrol/diesel)
Engine cooling, engine components, sup-M
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F4 plementary heater relay coils (1+2), secon-
dary air pump relay
FS Engine components, tank system
F6 Brake light sensor
F7 Engine components
256 No.
Electrical
equipment
F8 Lambda probe
F9 Engine
components, exhaust flap, control
unit for automatic glow period
FlO Fuel injectors, fuel control unit
Fll Supplementary
heater, heating rod 2
F12 Supplementary heater, heating rod 3
F13 Automatic gearbox control unit
FlS Horn
F16 Ignition coil
F17 ESC control unit, engine control unit
F18 Terminal 30 (reference voltage)
F19 Wipers
F20 Horn
F22 Terminal 50, diagnostics
F23 Starter
F24 Supplementary heater, heating rod 1
F32 LED headlights
Bulbs Note
Your vehicle is fitted with maintenance-free
headlights and rear lights. If a bulb does need to
be changed, however, please contact an Audi
dealer or qualified workshop.