service AUDI TT COUPE 2017 Repair Manual

Check ing and F illing
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
Fo r wo rk in th e engine compa rtmen t su ch as
c h ec kin g and filli ng flu id s, th ere is a risk of in ­
j u ry, sc aldin g, ac cide nts, a nd b urn s. For this
rea son, foll ow all the warning s and gener al
s a fe ty p recaution s pr ov ided in the f ollow ing in·
f o rm ation . Th e en gine c omp artmen t is a dan ­
ger ous are a.
¢ ,&.
_& WARNING
- T urn the engine off.
- Switch the ign ition off .
- Set the parking brake .
- Place the selector lever in the P pos ition.
- let the engine cool down.
- Never open the hood when there is steam or coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned . Wait until no steam or coolant is
escaping .
- Keep ch ildren away from the engine com­
partment .
- Never spill flu ids on a hot engine. These flu­
ids (such as the freeze protection contained
in the coolant) can catch fire .
- Avoid short circu its in the electrical system,
especially to the battery .
- When working in the engine compartment,
remember that the rad iator fan can sw itch
on even if the ign ition is switched off, which
increases the risk of pe rsonal injury .
- Never open the cap on the coolant expan­ sion tank when the eng ine is warm. The
cooling system is under pressu re .
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If tests need to be performed w ith the en­
gine running, there is additional danger d ue
244
to moving components (such as the ribbed
be lt, alternator and rad iator fan) and from
the high voltage ignition system.
- Do not press the acce lerator pedal inadver­
tently if a gear is selected when the vehicle
is stationary and the engine is running. Oth­
erwise, the vehicle will start to move imme ­
diately and this could result in an accident .
- Pay attent ion to the following warnings list­
ed when work on the fuel system or on the
electrical equipment is required.
- Do not smoke .
- Never work near open flames .
- Always have a working fire extinguisher
nearby
- All work on the battery or elect rical system
in your vehicle can result in injuries, chemi­
cal b urns, acc idents or burns . Because of
this, all work must be performed
onl y by an
authorized Audi dealer or authorized Audi
Service Facility.
- To reduce the risk o f electric shock and in ­
jury, never touch the following components
when the engine is running or is being start•
ed:
- Ign ition cable
- Other components in the electronic high -
vo ltage ign ition system
- If you must check or perform work on the
engine while it is running:
- Set the parking brake and place the selec­
tor lever in the P (park) position first .
- Always proceed w ith extreme caution so
that clothing, jewelry or long hair do not
become caught in the radiator fan, fan
belt or other moving components or do
not come into contact with hot compo­
nents. Tie back long hair before beginn ing
work and do not wear clothing that can hang down into the engine .
- Lim it your exposure to exhaust and chemi­
cals to as short a time as possible
¢ .&. .
A WARNING
California Proposition 65 Warning:

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-Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts , terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.
(D Note
When filling fluids, be sure not to mix the flu­
ids up. Otherwise severe ma lfunctions and en­
gine damage will occur.
@ For the sake of the environment
You shou ld regularly check the ground under
your vehicle in order to detect leaks quickly. If
there are visible spots from oil or other fluids, bring your vehicle to an authorized Audi deal­
er or author ized Audi Service Facility to be
checked.
Opening/closing the hood
The hood is released from inside the vehicle.
Fig. 187 Sect ion from the driver 's side footwell: release
lever
Checking and Filling
Fig. 188 Unlocked hood : lever
Make sure the wiper arms are not raised up from
the windshield. Otherwise the paint could be
damaged .
Opening the engine compartment lid
"With the driver's doo r open, pull the lever be-
low the instrument panel in the direction of the
arrow
q fig. 187.
" Raise the hood slightly ¢.&_ .
" Press the lever
qfig. 188 in the direct ion of the
arrow. This releases the hooks .
"O pen the hood .
Closing the engine compartment lid
" Push the hood down until you override the
force of the struts.
" Let the hood fall lightly into the latch .
Do not
press it in. ¢.&_ .
A WARNING ,..___
-Never open the hood when there is steam or
coo lant escaping from the engine compart ­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
- For safety reasons, the hood must always be
closed securely while driving. Because of
this, always check the hood after closing it
to make sure it is latched correctly. The
hood is latched if the front corners cannot
be lifted.
- If you notice that the hood is not latched
while you are driving, stop immediately and
close it, because this increases the risk of an
accident .
245

Checking and Filling
accurate measurement of oil consumption
requires great care and may take some
time. An author ized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
Checking the engine oil level and adding
engine oil
F ig. 190 O il d ipstick (example): c heck ing the eng ine o il
l evel
Fig . 191 Engine compartment: eng ine oi l fille r opening
cove r
Observe the safety precautions¢.& in Working
in the engine compartment on page 244 .
Check ing th e engin e oil l evel
-Park the vehicle on a level surface .
- Shut the engine off when it is warm. Wait ap-
0 N
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proximately two minutes so that the engine oil
can flow back into the oi l pan .
- Open the hood¢
page 245.
-Remove the oi l dipstick¢ page 246, fig. 189,
wipe it off with a clean cloth and insert it all the
way in again.
- Remove the oi l dipstick again and then read the
oi l level ¢
table on page 248.
- Add engine oil if necessary .
248
Area on oil dipstick ¢ fig. 190.
(D If the engine oil leve l is just before the
marking
(D , then engine oil must be added .
See¢ @.
@ Do no
t add engine oil.
Adding engine oil
- Unscrew the cap 't'::71 ¢ fig. 191 for the engine
oil fil ling open ing¢
page 246, fig . 189.
- Carefully add 0 .5 quart (0.5 liter) of the correct
oil ¢
page 246.
-Check the oil level again after two minutes .
- Add a smaller amount of engine oil if necessa-
ry . The marking @¢ fig. 190 must not be ex­
ceeded ¢Cl).
- Screw the engine oil filler cap
't'::71 and slide the
dipstick all the way in .
.&, WARNING
-When adding eng ine oi l, do not let o il d rip
on to hot engine components. Th is increases
t he risk of a fire.
- You must sea l the cap on the oi l filler open­
ing correct ly so that oi l does not leak out
onto the hot engine and exha ust system
when the engine is running, beca use this is
a fire hazard .
- Always clean skin thoroughly if it comes into
contact with engine oi l.
(D Note
- The engine o il level mus t not be under the
marking
(D ¢ fig. 190, because th is increas­
es the risk of engine dam age .
- After add ing engi ne oil, the oil leve l must
not be above the marking @¢
fig. 190, be­
cause this increases the risk of catalytic con­
verter and/or engine damage. Do not start
the engine. Contact an authorized Audi dealer or authorized Audi Service Facility to
have excess engine oil extracted if necessa­
ry.
- Do not mix any add itional lubr icants into
the engine oil. Damage caused by such add i-
t ives is not covered by the warranty.
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@ For the sa ke of the env ironment
- Engine oi l should never enter the sewer sys­
tem or come into contact with the ground
under any circumstances.
- Pay attention to legal requirements when
disposing of empty oil containers.
The engine oil consumption may be up to 0.5 quart/600 m iles (0.5 liter/1,000 km), de­
pending on driving style and operating condi­
tions. Consumption may be higher during the
first 3,000 miles (5,000 km). Because of this,
the engine oil level must be checked regular­ ly.
It would be best to check each time you re­
fue l your vehicle and before long dr ives.
Changing the engine oil
We recommend that have your oil changed by an
authorized Audi dealer or a qualified service sta­
tion.
Before you check anyth ing in the eng ine compart­
ment,
alw ays r ea d and heed all WARNINGS Q .&.
in Working in the engine compartment on
page 244.
The engine oil must be changed according to the
intervals specified in your Warranty
& Mainte­
n ance booklet. This is very important because the
l ubri cat ing propert ies of o il diminish gradually
d ur ing normal vehicle use.
Under some c ircumstances the eng ine o il should
be changed more frequently . Change oil more of­
ten if you d rive mostly short distances, ope rate
the vehicle in dusty areas or under predominant ly
stop-and -go traffic conditions, or have your vehi­
cle where temperatures remain below freezing
for extended periods.
Detergent additives in the oil will make fresh oil
l ook da rk after the engine has been running for a
short time. This is normal and is not a reason to
change the oil more often than recommended.
Because of the problem of p roper disposal, along
with the special tools and necessa ry expertise re­
qu ired, we strong ly recommend that you have
Ch eck ing and Filling
your oi l changed by an authorized Audi dealer or
a qualified service station .
If yo u choo se to ch ange yo ur oil your self, please
note the follow ing important info rmation:
A WARNING
=
To reduce the risk of persona l injury if you
must change the engine oil in your vehicle
yourself:
- Wear eye protect ion .
-
-To redu ce the r is k of burns from hot eng ine
oil, let the engine cool down to the touch.
- W hen remov ing the oil d rain plug w ith your
fingers, stay as far away as possib le. Always
keep your forearm parallel to the ground to
he lp prevent hot oil from running down your
arm.
- Drain the oil into a container designed for
this purpose, one la rge enough to hold at
least the tota l amount of oil in yo ur engine.
- Engine oil is poisonous. Keep it well out of
the reach of children.
- Continuous contact with used engine oil is
harmful to your skin. Always protect your
skin by washing oil off thoroughly with soap
and water.
(D Note
Never mix oil additives with your engine oil.
These additives can damage your engine and
adverse ly affect yo ur Audi Limited New Vehi­
cle Warranty.
@ For the sake of the environment
- Before chang ing yo ur oi l, first make sure
you know where you can properly d ispose of
the used oil.
- Always dispose of used engine o il properly.
Do not dump it on garden soil, wooded
areas, into open streams or down sewage
drains.
- Recycle used engine o il by tak ing it to a used
eng ine oil collection fac ility in your area, or
contact a service station .
249

Check ing and F illing
Cooling system
Coolant
The engine coo ling system is filled with a mixture
of pur ified wate r and coolan t addit ive at the fa c­
t ory . T his coo la nt must not be not changed .
The coolant leve l is monito red throug h the . in­
d icator light
c::> page 12. Howeve r, we do recom­
mend occasionally chec king the coo la nt level
manually.
If you must add coolant, use a m ixt ure of wa ter
a nd coo lant add it ive. Mixing the coolant additive
with d istilled water is recommended.
Coolant additive
The coolant additive is made of ant i-freezing and
corros ion protection agents. Only use the fo llow­
ing coolant add it ives. These addit ives may be
m ixed w it h each other.
Coolant additive Specification
G13
TL 774 J
G12++ TL 774 G
The amount of coo lant add itive that needs to be
mixed wit h water depends on the climate where
the vehicle will be operated . If the coolant addi ­
tive percentage is too low, the coolant can free ze
and damage the engine.
Coolant addi- Freeze protec-
tive tion
Warm regions min . 40%, m in. -13 °F
max . 45% (
- 25 °C)
Co ld regions min. 50%, max. -40 °F
max. 55% (-40 °C)
CJ) Note
-Befo re the start of winter, have your author ­
i zed Audi dealer or authorized A udi Service
Fac ility check if the coolant additive in yo ur
vehicle matc hes the percentage approp riate
for the climate . Th is is especially important
whe n driving in co lde r clima tes.
- If the approp riate coolant additive is not
available in an emergency, do no t add any
other addi tive . You cou ld damage the en-
250
gine . If this h appens, on ly use wa ter and re ­
store the correct m ixt ure ratio with t he
specified coo lant ad ditive as soon as poss i­
ble.
- Only refill w ith new coolant .
- Radiator sealant mus t not be mixed wi th
the coolant .
Adding coolant
Fig. 192 En gine co mpar tm ent: coo la nt expans io n ta nk
cove r
-"' -"' •
"" co a,
Observe the safety precautions c::> A in Working
in the engine compartment on page 244 .
Checking the eng ine coolant level
.,. Park your veh icle on a level s urface .
.,. Switch the ignit ion off.
.,. Read the coolant level on the coolant expansion
tank
c::> page 246, fig. 189. The coolant leve l
must be betwee n the markings when the en­
gi ne i n cold . When t he e ng ine is warm it can be
slightly above the uppe r mar king .
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion ta nk
c::> (D .
.,. Let the engine coo l down.
.,. Place a clot h over the coolant expansion tan k
cap and unscrew the cap counterclockw ise
¢ .&, .
.,. Add coo lant m ixed in the cor rect rat io
c;, page 250 up to t he up per ma rk ing .
.,. Make sure that the fluid level remains stab le.
Add mo re coolan t if necess ary.
.,. Close the cap sec urely .
Coo lant loss usually ind icates there is a lea k. Im-
med iate ly dr ive you r ve hicl e to a n author ized .,.

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Audi dealer or authorized Audi Service Facility
and have the cooling system inspected. If the
cooling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cooling system.
A WARNING
The cooling system is pressurized and can be­
come very hot . To reduce the risk of burns
from hot coolant:
- Do not open the coolant expansion tank cap when the eng ine is hot. This increases the
risk of burns.
- Stop the engine and allow it to cool.
- Protect your face, hands and arms from es-
caping coolant and steam by covering the
coolant tank cap with a large, thick cloth .
- Turn the coolant tank cap counterclockwise
slowly and keep light pressure on the cap .
- To reduce the risk of burns, do not allow any
antifreeze or coolant to drip onto the ex­
haust system or hot engine components .
The ethylene g lycol in engine coolant can
catch fire under certain circumstances.
- The coolant add itive and the coolant can be
dangerous to your health. For this reason,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
- When working in the engine compartment,
remember that the radiator fan can sw itch
on even if the ignition is switched off, which
increases the risk of injury.
(D Note
Do not add coolant if the expansion tank is
empty . Air could enter the cooling system and
damage the engine. If this is the case, do not
cont inue driving. See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
Checking and Filling
Brake fluid
Fig. 193 En gi ne compartment: cover on the b rake fluid
rese rvoir
Observe the safety precautions QA in Working
in the engine compartment on page 244 .
Checking the brake fluid level
.,. Read the brake f luid level on the brake fluid
reservoir
Q page 246, fig . 189. The brake fluid
level must be between the MIN and MAX mark­
ings
Q A .
The brake fluid level is monitored automatically.
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dealer or authorized Audi Service Facility.
.&_ WARNING
- If the brake fluid level is below the MIN
marking, it can impair the brak ing effect
and driving safety, which increase the risk of
an accident. Do not continue driving. See an
authorized Audi dealer or authorized Audi
Serv ice Facility for assistance.
- If the brake fluid is old, bubbles may form
in the brake system during heavy braking.
This would impair braking performance and
driving safety, which increases the risk of an
accident .
- To ensure the brake system functions cor­
rectly, only use brake fluids that comply
with VW standard 501 14 or
FMVSS-116 DOT 4.
251

Check ing and F illing
CJ) Note
- If the brake fluid level is above the MAX
mark ing, brake fluid may leak out over the
edge of the reservoir and result in damage
to the veh icle.
- Do not get any brake fluid on the vehicle paint, because it will corrode the paint.
Battery
General warn ings about batteries
All of the ba tteries in yo ur vehicle a re pr actically
maintenance-free and are checked dur ing a ve hi­
cle inspection . Because of the complex power
supp ly, all wo rk on batter ies such as d isconnect­
ing, replacing, etc. should
only be performed by
an author ized Audi dealer or authorized Audi
Serv ice Facility
c::> .&. .
The te rm "vehicle battery" refers to the 12 Vo lt
battery in your vehicle.
Detailed warning s for the vehicle battery:
®
W ear eye p rotection .
~
Battery acid is high ly co rrosive. We ar p ro-
tective gloves and eye pro tection.
@
Fire, sparks, open flame and smok ing a re
forb idden.
~
A highly explosive mixtu re of gases can
form when charging batteries.
®
Keep c hildre n away from battery acid and
ba tteries.
8_ WARNING
-All work on the ba tte ry o r electrica l sys tem in
your vehicle can result in injuries, chemical
burns, accidents o r burns. Because of this, a ll
work m ust be perfo rmed
only by an a uthor­
ized Aud i dea le r or aut horized Audi Serv ice
Facility .
8_ WARNING
California P roposit ion 65 Warning:
- Battery posts, termina ls and re lated acces­
so ries contain lead and lead compounds,
252
chemicals known to the State of California
to cause cancer and reproductive problems.
Wash hands after handling.
(D Note
Protect the vehicle battery aga inst freezing if
the veh icle wi ll be par ke d for long periods of
time so that it is not destroyed by "free zing"
c::> page253.
Vehicle battery
The term "vehicle battery" refers to the 12 Volt
ba ttery in your vehicle.
Not running the vehicle for long periods of
time
If you do not d rive your vehicle for severa l days o r
weeks, e lectrical equ ipment is g radually sca led
back or sw itched off. Th is reduces energy use and
ensures the vehicle will be ab le to start after long
per iods of t ime
c::> page 93. Some convenience
funct ions, such as interio r light ing o r power seat
adjustment, may no t be avai lab le unde r ce rtain
c ir cu ms tances . These co nvenience func tions will
be available again once you switch t he igni tion on
and sta rt the eng ine .
E ven when elect rical eq uipmen t is switched off,
t h e eq uipme nt can still drai n the vehicle ba tte ry
if the ve hicle is not dr iven for long periods of
time . Deep drai ning results in a chem ica l reaction
that destroys the i nside of the vehicle batte ry.
The vehicle battery must be charged every month
to reduce the risk of this happening
c::> page 253.
Contact an authori zed Aud i dea ler or authori zed
Audi Service Facility for more information.
Winter operat ion
Co ld weather places higher demands on the vehi­
cle battery. Th is res ults in reduced starting abili­
ty. Have the vehicle batte ry checked by an au­
thorized Audi dea ler or authorized Audi Service
Fac ility befo re t he cold time of year .

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Charging the vehicle battery
Fig. 194 Engine compartment: connectors for a charger
and jump start cables
Requirement: only use chargers with a maximum
charging voltage of 30 amps/14.8 Volts.
The
vehicle battery cables remain connected .
.,. Read the warn ings¢
& in General warnings
about batteries on page 252
and ¢ ,& .
.,. Switch off the ignition and all electrical equip­
ment .
.,. Open the hood¢
page 245 .
.,. Open the red cover on the positive terminal
¢fig. 194 .
.,. Clamp the charger terminal clamps to the jump
start pins
according to the instructions
¢fig. 194 .
.,. Now insert the power cable for the charging de­
vice into the socket and sw itch the device on.
.,. At the end of the charging process, switch the
charger off and pull the power cable out of the
socket .
.,. Remove the charger terminal clamps.
.,. Close the red cover on the positive terminal.
.,. Close the hood¢
page 245.
A WARNING
-A highly explosive mixture of gases can form
when charging batteries. Only charge the
vehicle battery in well-ventilated areas.
- A drained battery can freeze at tempera­
tures around 32 °F (0 °C). A frozen or
thawed vehicle battery must not be charged
and must not be used anymore. The battery
housing can crack and battery acid can leak
out if ice forms, which increases the risk of
an explosion and chemical burns . Contact an
Checking and Filling
authorized Audi dealer or authorized Audi
Service Facility for more information.
- Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.
@ Tips
- Only charge the vehicle battery through the
connections in the engine compartment.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle
battery.
Windshield washer system
Fig. 19S Engine compartment: washer fluid reservoir cap
The windshield washer reservoir{!} contains the
cleaning solution for the windshield and the
headlight washer system*¢
page 246, fig. 189.
The reservoir capacity is found in ¢ page 299.
To reduce the risk of lime scale deposits on the
spray nozzles, use clean water with low amounts
of calcium. Always add window cleaner to the wa­
ter. When the outside temperatures are cold, an
ant i-freezing agent should be added to the water
so that it does not freeze.
(D Note
-The concentration of anti-freezing agent
must be adjusted to the vehicle operating
conditions in the respective cl imate. A con­
centration that is too high can lead to vehi-
cle damage.
- Never add radiator anti-freeze or other addi-
tives to the washer fluid. .,.
253

Checking and Filling
-Do not use a glass cleaner that contains
paint solvents, because this could damage
the pa int .
Service interval display
The service interval display detects when your ve­
hicle is due for service.
The service interva l display works in two stages:
- Inspection or oil change reminder: after a cer-
tain distance driven, a message appears in the
Infotainment system display each time the ig­
nition is switched on or off . The remaining dis­
tance or time is displayed briefly.
- Inspection or oil change due: if your vehicle
has reached an inspection or oi l change interval
or both intervals at the same time, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af­
ter switching the ignition on/off .
Checking service intervals
You can check the remaining distance or time un­
til the next oil change or next inspection. Select
in the Infotainment system: the !MENU ! button>
Vehicle > left control button > Service & checks >
Service intervals.
{[) Note
-Following the service intervals is critical to
maintain ing the service life and value of
your vehicle, especially the engine. Even if
the mileage on the vehicle is low, do not ex­
ceed the time for the next service.
- Calculating the time to the next oi l change
i s interrupted when the vehicl e battery is
disconnected
~ page 2 79.
254

Wheels
(D Tires for passenger vehicles
(if applicable)
P indicates a tire for a passenger
vehicle. T indicates a tire desig­
nated for temporary use.
@ Nominal width
Nominal width of the tire be­
tween the sidewalls in millime­
ters. In general: the larger the
number, the wider the tire.
@ Aspect ratio
Height/width ratio expressed as a
percentage.
@ Tire construction
R indicates a radial tire.
® Rim diameter
Size of the rim diameter in inches.
@ Load index and speed rating
The load index indicates the tire's
load-carrying capacity.
The speed rating indicates the maximum permitted speed
¢ & in
Winter tires on page 2
70.
"EXTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
is an Extra Load tire.
Speed rat- Maximum permitted speed
ing
p
up to 93 mph (150 km/h)
Q up to 99 mph (160 km/h)
256
Speed rat- Maximum permitted speed
Ing
R
up t o 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up to 1 18 mph (190 km/h)
u up to 124 mph (200 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)al
z above 149 mph (240 km/h)al
w up to 168 mph (270 km/h)al
y up to 186 mph (300 km/h)al
a) For tires above 149 mph (240 km/h),
tire manufacturers sometimes use the
code "ZR".
(j) US DOT number (TIN) and
manufacture date
The manufacture date is listed on
the tire sidewall (it may only ap­
pear on the inner side of the tire):
DOT ... 2216 ...
means, for example, that the tire
was produced in the 22nd week of
the year 2016.
@ Audi Original equipment
tires
Audi Original equipment tires
with the designation "AO" have
been specially matched to your
Audi. When used correctly, these
tires meet the highest standards
for safety and handling. An au­
thorized Audi dealer or author­
ized Audi Service Facility will be