brake AUDI TT COUPE 2017 Service Manual

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circumference as the regular
tires .
8,_ WARNING , -
-Only use tire/rim combina-
tions and suitable wheel bolts
that have been approved by
Audi. Otherwise, damage to
the vehicle and an accident
could result.
-For technical reasons, it is not possible to use tires from oth­
er vehicles -in some cases,
you cannot even use tires from
the same vehicle model.
-Make sure that the tires you select have enough clearance
to the vehicle. Replacement
tires should not be chosen simply based on the nominal
size, because tires with a dif­
ferent construction can differ greatly even if they are the
same size. If there is not
enough clearance, the tires or
the vehicle can be damaged
and this can reduce driving
safety and increase the risk of
an accident.
-Only use tires that are more
than six years old when abso­
lutely necessary and drive
carefully when doing so.
Wheels
-Do not use run-flat tires on
your vehicle. Using them when
not permitted can lead to ve­ hicle damage or accidents.
-If you install wheel covers on
the vehicle, make sure they al­
low enough air circulation to
cool the brake system. If they
do not, this could increase the
risk of an accident.
Tire wear/damage
Fig. 197 Tire profile : treadwear indica­
tor
Tire wear
Check the tires regularly for wear .
-Inflation pressure that is too low
or high can increase tire wear
considerably.
-Driving quickly through curves, rapid acceleration and heavy
braking increase tire wear .
-Have an authorized Audi dealer
or authorized Audi Service Facili­
ty check the wheel alignment if
there is unusual wear.
263
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Wheels
plus maximum load. The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of 150 lbs (68 kg) for each passen­
ger at a designated seating posi­
tion and the total weight of any luggage in the vehicle.
The
Gross Axle Weight Rating
("GAWR") is the maximum load
that can be applied at each of the
vehicle's two axles.
The fact that there is an upper limit to your vehicle's Gross Vehi­
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle is limited.
The more passengers in the vehi­ cle or passengers who are heavier
than the standard weights as­
sumed mean that less weight can
be carried as luggage.
The Gross Vehicle Weight Rating and the Gross Axle Weight Rating
are listed on the safety compli­
ance sticker label located on the
driver's side B-pillar
c::> page 265,
fig. 198.
A WARNING
Overloading a vehicle can cause
loss of vehicle control, a crash
268
or other accident, serious per­
sonal injury, and even death.
-Carrying more weight than your vehicle was designed to carry will prevent the vehicle
from handling properly and
increase the risk of the loss of
vehicle control.
-The brakes on a vehicle that has been overloaded may not
be able to stop the vehicle
within a safe distance.
-Tires on a vehicle that has been overloaded can fail sud­
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
-Always make sure that the to­
tal load being transported does not make the vehicle
heavier than the vehicle's
Gross Vehicle Weight Rating.
Determining correct load
limit
Use the example below to calcu­
late the total weight of the pas­
sengers and luggage or other
things that you plan to transport
so that you can make sure that
your vehicle will not be overload- ed . ..

Care and cleaning
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when wash­ ing the underbody or the inside of the wheel
housings.
- After washing the vehicle, the braking effect
may be delayed due to moisture on the
brake rotors or ice in the winter. This in­
creases the risk of an accident. The brakes
must be dried first with a few careful brake
applications.
(D Note
- If you wash the vehicle in an automatic car
wash, you must retract the extendable rear
spoi ler* if necessary, and fold the exterior
mirrors in to reduce the risk of damage.
Power folding exterior mirrors* must only
be folded in and out using the power folding
function .
- To reduce the risk of paint damage, do not
wash the vehicle in direct sunlight. -
To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges or similar items.
- Matte finish painted vehicle components:
- To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
- Never use protective wax. It can destroy
the matte finish effect.
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint. The paint could be damaged
when the stickers or magnets are re­
moved.
@ For the sake of the environment
Only wash the veh icle in facilities spec ially de­
signed for that purpose. This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle
components, refer to the following tables. The
information contained there is simply recom­
mendations. For questions or for components that
are not listed, consult an authorized Audi
dealer or authorized Audi Service Facility. Also
follow the information found in¢.&. .
Exterior cleaning
Component Situation Solution
Windshield wiper
Deposits ¢ page42
blades
Headlights/
Deposits Soft sponge with
a m ild soap solution a>
Tail lights
Sensors/
Deposits Sensors: soft cloth with solvent-free cleaning solution
Camera lenses Camera lenses: soft cloth with alcohol -free cleaning solu-
tion
Snow/ice Hand brush/solvent-free de-icing spray
Wheels Road salt
Water
Brake dust Acid-free special cleaning solution
Exhaust tail pipes Road salt Water, cleaning solution suitab le for stainless steel, if nee-
essary
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Emergency assistance
General information
"' Park the vehicle as far as poss ible from moving
traffic in the event of a breakdown. In the event
of a flat tire, park the vehicle on a leve l surface .
It you are on a steep h ill, be especially careful.
"' Set the parking brake.
"' Place the selector lever in the P position .
"' Switch the emergency flashers on .
"' Have the passengers exit the veh icle . They
shou ld move to a safe place, for example be­
hind a guard rail.
_& WARNING
Follow the steps given above. This is for your
protection and the for the safety of other d riv­
ers .
Equipment
Vehicle tool kit/tire mobility kit/
compressor
F ig . 200 Luggage co mpa rtment : ca rgo floo r closed
The vehicle tool kit, tire mobility kit and com­
p ressor are sto red in the luggage compartment
u nder the ca rgo floor cover.
"' Push on the plast ic handle and lift up the cargo
floor .
"' Open the cargo floor .
Completely ret ract the vehicle jack arm before
storing the vehicle jack* .
_& WARNING
Improper use of the vehicle jac k can ca use se­
r ious personal inju ries .
Em ergen cy a ssis tanc e
-Never use the screw driver hex head to
tighten wheel bolts, since the bolts cannot
attain the necessary tightening torque if you
use the hex head, potentially causing an ac­
cident .
- The factory-supplied jack is intended only
for your veh icle model. Under no circum ­
stances shou ld it be used to lift heavy
veh icles or othe r loads; you risk injuring
yourself.
- Never start the engine when the vehicle is
raised, which co uld cause an a ccident.
- Support the vehicle securely with a ppropri­
ate stands if wo rk is to be pe rformed under­
nea th the vehicle; otherwise, there is a po­
tential risk fo r injury.
- Never use the ja ck supp lied with your Aud i
on ano ther veh icle, p articularly on a heavier
one. The jack is only s uitab le for use on the
veh icle it came with.
(D Tips
The vehicle ja ck* in your vehicle is ma inte­
nan ce-free.
Tire mobility kit
Preparation
App lies to : vehicles wi th tire mo bility kit
"' Read and follow the important safety precau-
tions <=>
page 281 , General information .
"'Set the park ing brake .
"' Select the P selector lever posit ion .
"' Check if a repair wi th the tire mob ility kit is pos­
sible
<=> page 282.
281

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~ Install the compressor pressure hose® onto
the flange @ on the tire sea lant bottle @.
~ Insert the sealant bottle with the flange at the
bottom into the opening @ on the compressor
cover.
~ Remove the valve cap from the faulty t ire .
~ Install the filler hose @on the valve (J)
¢fig . 203 .
~ Connect the plug@¢ fig. 202 to a socket in
the vehicle.
~ Switch on the ignition.
Inflating a tire
~ Move the switch @¢ fig. 203 on the compres­
sor into posit ion
I.
~ Inflate the t ire to between 29 psi (200 kPA)
and 36 psi (250 kPA) and read the p ressure on
the gauge.
~ If this tire pressure is not reached, remove the
filler hose. Drive s lowly approximately 33 ft (10
m) forward or in reverse so that the sealant can
be distributed in the tire. Pump up the tire
again¢ .&.,.
A WARNING
-Read and follow the manufacturer's safety
precautions on the compressor and in the
instructions on the bottle of sealant.
- If a tire pressure of 29 ps i (200 kPA) cannot
reached afte r inflating for 6 minutes, then
the tire is too severely damaged. Do not
contin ue driving.
- If the t ire cannot be repaired with the tire
sealan t, see an authorized A udi dealer or au­
thorized Aud i Serv ice Facility for ass istance .
Do not operate the compressor for mo re than
six m inu tes continuously, or it can overheat.
Once the compressor has coo led, you can con­
tinue to use it .
Completing
Appl ies to: ve hicles with tire m obility kit
~ Adhere the sticker that says "max. 50 mph
(max . 80 km/h)" that is provided with the tire
mobility kit within the driver's fie ld of vision.
Em ergenc y ass is tanc e
~ Stop the vehicle a fter driving for about 10 mi­
nutes and check the tire pressure.
~ If the tire pressure is lower than 19 psi (130
kPA), then the tire is too severely damaged. Do
not continue dr iving.
A WARNING
Pay attention to the following afte r repa iring
the tire:
- Do not dr ive faster than 50 mph (80 km/h) .
- Avoid hard acceleration, braking sharply,
and fast cornering.
- The vehicle may become more difficult to
control.
- If the tire is too severe ly damaged, see an
authorized Audi dealer or authorized Audi
Serv ice Facility for assistance.
® For the sake of the environment
You can give the used tire sealant bottle to an
authorized Audi dea ler or authorized Audi
Service Fac ility for disposal.
(D Tips
Remember to obtain a new bott le of sealant
from an authorized Audi dealer or authorized
Audi Service Fac ility after repairing a tire.
Replacing wheels
Preparation
You must complete the preparation before
changing a tire.
~ Read and follow the important safety precau-
tions¢
page 281, General information.
~ Set the park ing brake.
~ Select the P selec to r lever posit ion.
~ Lay out t he vehicle too l kit¢ page 281 and the
spare tire~
page 287 .
A WARNING ~ -
If you are changing a tire on a steep hill, use a
b lock or similar object to b lock the opposite
wheel to prevent the vehicle from moving.
283

Emergency assistance
_& WARNING
You or your passengers could be injured while
changing a wheel if you do not follow these
safety precautions :
- If you have a flat tire, move a safe distance
off the road. Turn off the engine, turn the
emergency flashers on and use other warn­
ing devices to alert other motorists.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipp ing off the jack,
always fully set the parking brake and block
the wheel diagona lly opposite the wheel be­
ing changed . When one front wheel is lifted
off the ground, placing the Automatic
Transmission in P (Park) will
not prevent the
vehicle from moving.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack.
- Always store the vehicle tool kit, the jack
and the replaced tire in the luggage com­
partment
c:> page 185.
@ Tips
Obey all laws.
Removing the cover
Fig. 204 Whee l: wheel hub cover
284
Fig. 20S Wheel: wheel bolts with caps
Wheel hub covers*
.. Insert the hook (from the vehicle tool kit) into
the hole on the whee l hub cover
c:> fig . 204.
.. Remove the wheel hub cover.
Wheel bolts with caps*
.. Slide the plastic clip (from the vehicle tool kit)
onto the cap until it engages
c:> fig. 205.
.. Remove the cap with the plastic clip.
Loosening the wheel bolts
Fig. 206 Changing a tire: loosen the wheel bo lts
.. Slide the wheel wrench (from the vehicle tool
kit) all the way onto the wheel bolt .
.,. Turn the wheel bolt approximately one turn to
the left -arrow- . To reach the required torque,
hold the end of the wheel w rench. If the wheel
bolt will not loosen, press carefu lly on the
wheel wrenc h with your foot. Hold on to the ve­
hicle securely while during this and make sure
your stance is stable.
&_ WARNING
To reduce the risk of an accident, only loosen
the wheel bolts gently (one turn) before rais­
ing the vehicle with the vehicle jack* .

Emergency assistance
Removing and mounting a wheel
Fig. 209 Wheel: internal hex socket to turn the whee l
bolts
Fig. 210 Whee l: alignment pin in the top hole
Removing a wheel
., Remove the top wheel bolt complete ly using
the hex socket in the screwdriver hand le (in the
vehicle tool kit)
c::> fig. 209 and place it on a
clean surface.
., Install the alignment pin (from the vehicle tool
kit) by hand into the empty hole
c::> fig. 210.
., Remove the rest of the wheel bolts.
., Remove the wheel
c::>(D . The alignment pin re-
mains in the hole wh ile doing this.
Install a wheel
Read the directions on
c::> page 286 when instal­
ling unidirectional tires.
., Slide the wheel on over the alignment pin
c::> (D .
., Install the wheel bolts and tighten gent ly using
the hex socket.
., Remove the alignment pin and also tighten the
remaining wheel bo lt .
., Carefully lower the vehicle using the vehicle
jack* .
., Tig hte n the wheel bolts i n a diagona l pattern
using the wheel wren ch.
286
The wheel bolts must be clean and loosen/tight ­
en easily . Check the contact surfaces for the
wheel and hub. Contam inants on these surfaces
must be removed before installing the wheel.
A WARNING
Never use the hex socket in the screwdriver
handle to tighten the wheel bolts. Using the
hex socket will not achieve the required tight­
ening torque, which increases the risk of an
accident.
(D Note
When removing or installing the wheel, the
rim could h it the brake rotor/ceramic brake
r otor* and damage the rotor. Work carefully
and have a second person help you .
(D Tips
- When mounting tires with unidirectional
tread design make sure the tread pattern is
pointed the right way
Q page 286.
-The wheel bolts should be clean and easy to
turn. Check for dirt and corrosion on the
mating surfaces of both the wheel and the
hub. Remove all dirt from these surfaces be­
fore remounting the whee l.
Unidirectional tires
A unidirectional tire profi le is identified by arrows
that point in the runn ing direction on the tire
s idewall. You must always adhere to the speci­
fied running direction. This is necessary ensure
the tire's optimum performance in regard to ad­
hesion , running noise, friction and hydroplaning.
To benefit fully from the advantages of the uni­
directional tire design, you should replace faulty
tires as soon as possible and restore the correct
running direction on all of the tires.
Finishing
., Re install the caps on the wheel bolts if neces­
sary .
., Store the veh icle tool kit in its designated
place . .,.

Fuses and bulbs
Interior fuse assignment
Fig. 215 Vehicle inter ior: fuse assignme nt
No. Equipment
Fl Power top control modu
le (Roadster)
F2 Power top control module (Roadster)
F3 ESC control module
F4 Central computer processor (MIB-2)
FS Gateway
F6 Anti-theft alarm system Climate control system, selector lever (au-
F7 tomatic transmission), parking heater,
rear window heater relay coil
Diagnos is, electrical parking brake switch,
F8 light swi tch, rain/light sensor, interior
lighting
F9 Steering column switch module
Fl0 Display
F ll Haldex clutch
F12 MMI area
F 13 Adaptive dampers control module
F14 Climate control system blower
FlS Electronic steering co lumn lock
F16 MMI components, safety be
lt microphone
(Roadster)
290
No . Equipment
F17 Instrument cluster
F18 Rearview camera
F19 Convenience key system control module
F20 Power lumbar support adjustment
F22 Front passenger's side neck heating (Road-
ster)
F23 R
ig ht exterior lighting, on-board compute r
(right)
F 25 Driver's s
ide door (for example power win-
dows)
F26 Seat heating
F28 AMI H igh med ia port
F29 On-board computer
F31 Left on-board computer
F32 Driver assistance systems
F33 Airbag
Socket relay, interior sound, back-up light
F34 switch, temperature sensor, oil level sen-
sor
Diagnosis, headlight range control system,
F35 air quality sensor, automatic dimming
rearview mirror
F36 Right cornering light/ r ight LED-h eadlight
F37 Left cornering light/ left LED-headlight
F38 E
ng ine control module, ESC control mod-
ul e
F39 Front passenger's side door (for example
power windows)
F40 Cigarette lighter, sockets
F41 SCR relay and delivery unit
F42 Central locking area
F43 On-board computer
F45 Power adjustable driver's side seat
F46 Driver's side neck heat ing (Roadster)
F49 Starter, clutch sensor
FS0 ESC valves
F53 Rear window defogger
The power seats* are protected v ia
circuit break­
ers
that automatically switch on after a few sec­
onds after the overload has been reduced .

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Left engine compartment fuse assignment
Fig. 216 Engine compartment: fuse ass ignment
No. Equipment
Fl ESC control module
F2 ESC control module
F3 Engine control module
Engine cooling, engine components, auxili -
F4 ary heater coil re lay ( 1+2), secondary air
injection pump relay
FS E
ngine components, tank system
F6 Brake light sensor
F7 Engine components
F8 Oxygen sensor
F9 Engine components, exhaust door, glow
time control module
FlO Fuel injectors, fuel control module
Fll Auxiliary heater heating element 2
F 12 Auxiliary heater heating e
lement 3
F13 Automatic transmission cont rol module
FlS Horn
F16 Ignition coil
F17 ESC control module
, engine control mod-
ule
F18 Term inal 30 (reference voltage)
Fuses and bulbs
No . Equipment
Fl9 Windshield wipers
F20 Horn
F22 Terminal SO diagnos
is
F23 Starter
F24 Auxiliary heater heating element 1
F3 2 LED headlights
Bulbs
Message
Your vehicle is equ ipped with maintenance-free
headlights and tail lights . However, if a light bulb
needs to be replaced, p lease contact yo ur author­
ized Audi dea ler or authorized Audi Service Facili­
ty.
291

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When jump starting or charging the battery,
never connect the negative ground cable to
the battery negative post because the battery
manager system must be able to detect the
battery's state of charge. Always connect the
negative ground cable to the negat ive ground
post of the battery manager control unit .
Use of jumper cables
Make sure to connect the jumper cable clamps in
exactly the order described below!
Fig. 217 Engine compartment: connectors for jump start
cables and c harger
Fig. 218 Jump starting w ith the battery of another vehicle :
A -discharged vehicle battery, B -booster battery
The proc edure desc ribed below for connecting
jumper cables is intended to provide a jump start
for your vehicle.
Vehicle with discharged battery:
.. Turn off lights and accessories, move lever of
automatic transmission to N (Neutral) or P
(Park) and set parking brake .
Connect POSITIVE(+) to POSITIVE(+) (red)
.,. Open the red cover on the positive terminal
~fig. 217.
Emergency situations
1. Connect one end of the red positive cab le on
the
jump start bolt~ fig. 218 (D (bolt und er
the red cover= "posit ive") of the veh icle to be
started @.
2. Connect the other end to the posit ive termi-
nal @of the booster battery @.
Connect NEGATIVE (-) to NEGATIVE (- )
(black)
3. Connect one end of the black negative cable
to the negative terminal @ of the booster
battery @.
4. Connect the other end to the
jump start pin
@ ("negative") of the vehicle to be started
@.
Starting the engine
.. Start the engine of the vehicle with the booster
battery @. Run the eng ine at a moderate
speed .
.,. Start engine w ith discharged veh icle battery @
in the usual manner.
.,. If the engine fails to start, do not keep the
starter cranking for longer than 10 seconds.
Wait for about 30 seconds and then try again .
.. With engine running, remove jumper cables
from both vehicles in the exact
reverse order .
.. Close the red cover on the positive terminal.
The battery is vented to the outside to prevent
gases from entering the vehicle interior . Make
sure that the jumper clamps are well connected
with their metal parts in full contact with the battery term inals .
A WARNING
To avoid ser ious personal injury and damage
to the vehicle, heed all warnings and instruc­
tions of the jumper cable manufacturer.
If in
doubt, call for road service.
- Jumpe r cables must be long enough so that
the vehicles do not touch .
- When connecting jumper cables, make sur e
that they cannot get caug ht in any moving
parts in the engine compartment.
- Before you check anything in the engine
compa rtment, always read and heed all
WARNINGS ~
page 244 .
293