check engine AUDI TT ROADSTER 2011 Owner's Guide

-To avoid being burned, do not sp ill an­
tifreeze or coolant on the exhaust sys­ tem or hot engine parts. Under certa in
conditions, the ethylene glyco l in en­
g ine coolant can catc h fire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its or iginal co ntaine r and well
o ut of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clearly ma rked "poison".
(D Note
- Coolant pollutes the env ironment and
could cause a n engine fire. Excess cool­
ant wi ll be forced out through the pres­
su re re lief va lve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the cor rect ratio be tw een wate r
and antifreeze
¢page 185 must be re­
store d as soon as possib le.
@ For the sake of the environment
Drained coolant s hould no t be reused. Al­
ways dispose of use d coolan t w hile obse rv ­
ing all envir onmental reg ulations.
Radiator fan
The radiator fan switches on automatically by
i tself
The electric radiator fan is contro lled by ther­
moswitches that switch on and off depend ing
on coolant and eng ine compa rtment tempera­
tures.
An aux iliary electr ic radiator fa n* switches on
and off depen ding on coolant t emperature
and other ve hicl e operation conditions.
After you switch t he engine off, the a uxiliary
fan ca n cont inue runn ing fo r up to 10 minutes
- even with the ignition off .
It can even sw itch
on agai n later by i tself
c::> &., , if
- the temperature of the eng ine coolant rises
due to the heat bui ld-up from the eng ine in
t h e engine compartment, o r
Checking and fillin g 187
- the engine compartment heats up because
the vehicle is parke d in intense sunlight.
A WARNING
-To reduce the risk of persona l in ju ry nev­
er touch the radiator fan .
- The a uxiliary electric fan is tempe rat ure
contro lled and can switch on suddenly
even when the engine is not running.
- The a uxiliary radiator fan sw itches on a u­
tomatically when the engine coo lant
reaches a certa in temperature and w ill
continu e to run until the coo lant temper­
ature drops.
Brake fluid
Checking brake fluid level
T he brake fluid level can be checked wi th a
qui ck gl ance.
Fi g. 142 Engin e compart ment : brake flu id reservoir
Before you check anyth ing in the eng ine com­
partment,
alw ays read and heed all WARN­
INGS c::> A in Working in the engine compart­
ment on page 178 .
.,. Read the brake fluid level from the brake
fluid reservoir
c::> fig. 142. The brake fluid
level must be between the "MIN" and
"MAX" markings.
The brake fluid reservoir is located behind the
rear partition of the engine compartment on
the left side
c::> page 180.
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads. This is not cause for alarm.
IJ1'-

still functioning and they will draw energy
from the battery and drain it, for example, the
engine immobilizer . To prevent this, you can
e ither charge the battery occasionally to keep
it in good working condi tion or you can d is­
connect the negat ive cable on the battery .
Winter ope ration
During the winter months, battery capacity
tends to decrease as temperatures drop . This
is because more power is also consumed while
start ing, and the headlights, rear window de­
fogger, etc ., are used more often .
Avoid unnecessary power consumption, par­
ticularly in c ity traffic or when traveling on ly
short distances. Let your authori zed Audi
dealer check the capacity of the vehicle bat ­
tery before winter sets in
¢ page 192. A well
charged battery w ill not only prevent starting
p rob lems when the weathe r is cold, but will
a lso last longer .
Replacing b attery
The new battery m ust have the same capaci ­
ty, voltage (12 volts), amperage, construction
a n d p lug sealing, as the origina l batte ry. Spec­
ifications are listed on the batte ry housing.
Batteries specially developed by A udi f ulfill
the ma intenance, output, and safety require ­
ments.
When insta lling the bat tery , make sure the ig­
n ition and all e lectr ica l cons umers are sw itch­
ed
off ¢ (j) .
We recommend that you use ma intenance­
free or
cy cle-re sis tant /le ak -proof batteries
according to the standards TL 825 06 (from
December 1997) and VW 7 SO 73 (from Au ­
gust 200 1).
Replacing the battery should be ca rried by a
qua lified workshop. Please follow the instruc­
tions on the battery cover.
(D Note
- All work on t he battery requires techni­
ca l knowledge. Please contact an A udi
dealership or anothe r authorized facili ty
Checkin g and fillin g 189
for questions abo ut the batte ry - danger
of acid burns and exp losion hazard!
- T he battery must not be opened! Do not
try to change the battery's liquid level,
otherwise detonating gas will escape
from the battery - explosion hazard!
- The AGM battery in the luggage com­
partment cannot leak, because the elec ­
tro lyte for this battery is absorbed into a
special glass mat. This leak-proof battery
must not be replace with a convent iona l
battery.
- Make sure the ventilation hose on the
side of the battery is connected, other­
w ise fumes or battery ac id can leak out.
- Battery holder and terminals always
have to be secured correctly.
- Before all work on the battery follow the
warnings below ¢.&. in Working on the
battery on page 190.
@) For the sake of the environment
Because of the prob lem of proper disposal
of a battery, we recommend your author ­
ized Audi dealer change the battery for
you. Batteries contain sulfur ic acid and
l ead and must always be disposed of prop­
erly in compl iance with a ll environmental
regulat ions. Disposing of vehi cle batter ies
improperly is very dangerous to the envi ­
ronment. Make sure that the removed bat­
tery cannot overbalance, otherwise sulfu­ ric acid might escape!
(D Tips
If your vehicle is left standing for several
weeks at extremely low temperatures, the
vehicle battery shou ld be removed and
stored where it w ill not freeze. This will
prevent it from be ing damaged and having
to be replaced . •
•

190 Checking and filling
Working on the battery
Be especially careful when working on or near
the battery!
Fig . 14 3 Luggage compartment: AGM battery
The battery is loca ted in the luggage compart­
ment.
~ Swing up the luggage compartment floor.
The positive( +) battery terminal is p rotected
by a plast ic cover . This cover must be removed
to access the positive( +) termina l when con­
necting jumper cables to start the eng ine .
Always heed the
safe ty war nings, when work­
ing on the vehicle battery or the vehicle elec­
tr ica l system to prevent injury .
The following WARN INGS are ver y
import ant when w orking on the battery:
Alw ays heed t he follow ing W ARNING SYM ·
BOLS a nd safety precautions wh en working
on th e bat tery.
® Always wear eye protection .
I).. Battery acid contain s sulfuric acid. Al ­
~ ways wear gl oves a nd e ye prot ecti on.
I/£ No
\l:!S' -spar ks
• flames
- smoking.
When a batter y is ch arged , it pr odu ce s
h y d rogen g as which i s ex plosi ve and
could cau se personal injury.
----Always keep the battery well out of
re ach of children .
®
.&_ WARNING
Whenever working on the battery or on
the elect rical system, there is the risk of
i njury, accident and even fire. Read and
heed the fo llowing WARNINGS:
-Always wear eye protection. Do not let battery ac id or any lead particles get on
your skin o r clothing. Shield your eyes.
E xp losive gases can cause blindness or
o ther inju ry.
- Ba ttery acid conta ins sulfuric acid. Sulfu­
ric acid can ca use blindness and severe
burns .
- Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilat ion open ­
ings .
- If you get battery acid in your eyes or
on your skin, immediately rinse w ith
cold water for several minutes and get
medica l attent ion.
- If you shou ld ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open flame, e lectr ic sparks or an open light .
- Do not smoke.
- Do not interchange the positive and neg-
ative cables.
- When working on the battery, be sure
not to short-circuit the terminals with
tools or other metal objects . Th is would
cause the battery to heat up very quickly,
which could lead to damage or explosion and personal injury.
- When a battery is charged, it produces
hydrogen gas which is explos ive and
could cause pe rsonal in ju ry.
- Always keep the battery well out of the
reac h of children.
- Before work is done on the electrical sys­
tem, disconnect the negat ive g round ca­
b le.
- Before performing any work on the e lec­
tr ica l system, switch off the engine and
ignit ion as well as any elec trical equip­
ment. The negative cable on the bat tery

must be disconnected. If you are just go­
ing to replace a light bulb, then it is
enough to switch off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you will set off the alarm.
- When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable. Never inter­
change the cables -this could start a fire!
- Never charge a frozen or a thawed-out battery. It could explode! If a battery has
frozen, then it must be replaced. A dis­
charged battery can freeze over at 32 °F
(0 oc).
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat­
tery.
- Never use batteries which are damaged.
Danger of explosion! Always replace a
damaged battery.
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems. Wash hands after han­
dling.
CD Note
- Do not disconnect the vehicle battery
when the ignition is switched on or when
the engine is running, otherwise, you will
damage electronic components in the
electrical system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then have to be replaced.
Checking and filling 191
Checking the battery acid level on magic
eye batteries*
The battery acid level in the battery can be
checked through the clear inspection window .
Fig. 144 Luggage compartment: Battery With magic
eye.
On top of the battery, there is a round "win­
dow". This window (magic eye) changes color
as the battery charge and acid level change.
.. Read and heed all WARNINGS
c::> &_ in
Working on the battery on page 190
.. Read the acid level from the window on the
battery
c:> fig. 144.
Air bubbles in the window can cause an inac­
curate reading . Carefully tap on the side of
the window.
- If the window is
green, the battery acid level
is correct.
- If the window has no color or is bright yel­
low ,
the battery acid level is too low . Have
the battery tested by your authorized Audi
dealer or a qualified workshop.
- If the window is
black , then the battery is
insufficiently charged . Recharge the battery
as soon as possible
r:::, page 192 .
CD Note
Do not overfill the battery, otherwise bat­
tery acid will overflow through the vent
opening. This can damage the paint and
cause corrosion .

192 Checking and filling
Charging of battery
Starting the engine requires a well charged battery.
,. Always read and heed all W ARNIN GS be­
low
c> A and c> A in Working on the bat­
tery on page 190.
,. Switch off the ignitio n and all electrical con­
s u mers.
,. Make sure the area is well vent ilated when
yo u charge the battery.
,. Connect charger cables.
ALWAY S co nnect
ch arg er ca ble s PO SITIV E
G) to POSITIVE
G) ; NE GATI VE Q to NEGATI VE Q .
,. Switch on the charger.
,. Make sure the charging rate is not over
6 amps.
,. Turn off the charger¢.&_.
,. Disconnect the charger cables .
,. Connect both battery cables to the battery if
necessary-
first plus, then m inus.
It is not necessary to remove the battery from
the luggage compartment, and it is also not
necessa ry to disconnect the cables.
Normally, a battery should be charged at no
more than 10 percent of its rated capacity.
For example, a charging current of 4.5 amps
wou ld be used on a battery rated at 45 Ah.
Rated capacity of the battery in your veh icle is
listed on the battery housing .
The battery caps should
not be opened when
charging a battery.
&,. WARNING
-
Charging a battery can be dangerous.
- Never charge a frozen battery . It may ex­
plode because of gas trapped in the ice.
Allow a frozen battery to thaw out first.
- Do not reuse batteries which were fro­
zen. The battery housing may have
c racked and weakened whe n the battery
froze.
- Charge the battery in a we ll ventilated
area . Keep away from open f lame o r elec­
t ric al spa rk . Do not smoke. Hydrogen gas
gene rate d by the b attery is exp losive. -
To reduce the danger of explosion, never
connect or d isconnect charger cab les
while the charger is operating .
- Fast charging a battery is dangerous and
should only be attempted by a compe­
tent tech nician with the proper equip­
ment .
- Battery acid that may spill during charg­
ing should be washed off with a solution
of wa rm water and bak ing soda to neu­
tralize th e ac id .
(D Note
Never use a fast charger as a booster to
start the eng ine . Th is w ill seriously dam­
age sensit ive electronic components, such
as cont ro l units, re lays, radio, etc., as well
as the battery charger.
{1) Tips
The vehicle batte ry must not be charged
with a standa rd small charger that p lugs
i nto the cigarette lig hter or outlet.
Windshield/head Light
washer container
Fig . 14 5 Fender, left: Windshie ld washer fluid reser·
vo ir
T he washer fluid container is marked with the
symbol
O on its cap.
,. Before you check any thing in the engine
compa rtme nt,
a lwa ys read and heed all
WARNINGS ¢
A in Working in the engine
compartment on page 178 .
,. Lift the filler cap tongue to add washer flu-
id. You can fill the container to the top.
111>

~ Press the cap back onto the filler neck after
filling the container .
You can find the reservoir
c ap acit y in the tab le
in
c::> page 239.
C lean water should be used when filling up. If
possible, use soft wate r to prevent scal ing on
the w asher jets. Always add a glass cleaner
solution (with frost protection in the winter) .
(D Note
Do not mix engine coolant antifreeze or
any other add itives to fi ll up the wind­
shie ld washer reservoir.
Checkin g and fillin g 193
•
•

Fuses and bulbs
Electrical fuses
Replacing fuses
Fuses that have blown will have metal strips
that have burned through.
Fig. 170 End face of instrument panel: removing cover
p late to access fuses
Fig. 171 Left side of eng ine compart ment: fuse cove r
Fuse cover on the left end face of the
instrument panel
.. Switch off the ignition and the electrical
component affected .
.. Carefully pry the fuse cover off the instru ­
ment panel using the ignition key or a
screwdriver ~
fig. 170.
.. Check the fuse list ing on the next pages to
find o ut which f use belongs to the compo­
nent which has failed ¢
page 228, Fuse Lo­
cation, Instrument Panel left .
.. Remove the blown fuse with the plastic clip
provided. The clip is located on the holder in
the fuse box.
.. Replace a blown fuse (recognizable by the
melted metal str ip inside) with a fuse of the
same amperage .
.. Firmly snap the cover back onto the instru­
ment pane l face .
Fuse s and bulbs 22 7
Fuse cover in engine compartment
.. Switch the ignit ion and the affected con­
sumer off .
.. Unlatch the fuse cover, p ush the two slides
forward
~ fig. 171.
.. Find out which fuse belongs to the equip­
ment which stopped working
~ page 229,
Fuse location, le~ side of engine compart­
ment.
.. Remove the plastic from its retainer in the
fuse box cove r (left face end of the instru­
ment panel), place it on the f use in question
and pull it out .
.. If the fuse is burned out (recognizable by
melted strips of metal), replace it with a
new fuse
of the same rating.
.. Replace the fuse cover .
.. Push the two slides to the rear¢
fig. 171.
Install the fuse cover carefully to prevent
water from enter ing .
The various electrical circuits are protected by
fuses. The fuses are clustered in a centralized unit. The unit is located behind the face panel
at the end of the instrument panel.
Two spare fuses and a sticker identifying the
fuses are located on the inside of the fuse box
cover.
You are well advised to keep a supply of spare
fuses in your vehicle. Fuses with the proper ampere ratings are available at your author­
ized Audi dealer .
A WARNING
Do not repair fuses and never replace a
blown fuse with one that has a higher amp
rating. Th is can cause damage to the elec­
trical system and a fire .
(D Note
If a new fuse burns out again after short ly
have you have installed it, have the electri­
cal system checked by your authorized Au­
di dealer .

Emergency situations
General
This chapter is intended for trained emer­
gency crews and working personnel who
have the necessary tools and equipment to
perform these operations.
Starting by pushing or
towing
(D Note
Vehicles with an automatic transmission
cannot be started by pushing or towing .
Starting with jumper
cables
If necessary, the engine can be started by
connecting it to the battery of another vehi­
cle.
If the engine should fail to start because of a
discharged or weak battery, the battery can be
connected to the battery of
another vehicle,
using a
pair of jumper cables to start the en­
gine.
Jumper cables
Use only jumper cables of sufficiently
largec ross section to safely carry the starter
current. Refer to the manufacturer's specifica­
tions.
Use only jumper cables which have
insulated
termina l clamps and are properly marked for
distinction :
plus(+) cable in most cases colored red
minus(-) cable
i n most cases colored black.
_& WARNING
Batteries contain electricity, ac id, and gas.
Any of these can cause very serious or fatal
injury. Follow the instructions below for
safe handling of your vehicle's battery.
- Always shield you r eyes and avoid lean­
ing over the battery whenever possible.
Emergency situations 231
-A discharged battery can already freeze
at temperatures just below 32 °F (0 °C).
Before connecting a jumper cable, the
frozen battery must be thawed com­
pletely, othe rwise it could explode .
- Do not allow battery acid to contact eyes
or skin . Flush any contacted area with
water immediately .
- Improper use of a booster battery to
start a vehicle may cause an explosion.
- Vehicle batter ies generate explosive gas­
es. Keep sparks, flame and lighted ciga­
rettes away from batteries.
- Do not try to jump start any veh icle w ith
a low ac id level in the battery.
- The voltage of the booster battery must
also have a 12-Volt rating. The capacity
(Ah) of the booster battery should not be
lower than that of the discharged bat­
tery . Use of batteries of different voltage
or substantially different "Ah" rat ing
may cause an exp losion and personal in­
jury.
- Never charge a frozen battery. Gas trap­
ped in the ice may cause an explosion.
- Never charge o r use a battery that has
been frozen . The battery case may have
be weakened.
- Use of batter ies of different voltage or
substantially different capacity (Ah) rat ­
ing may cause an exp losion and injury .
The ca pa city (Ah) of the booster battery
should not be lower than that of the dis­
charged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS¢
page 172, Engine com­
partment.
(D Note
- App lying a higher voltage booster bat­
tery will cause expensive damage to sen­
sit ive electronic components, such as
control units, relays, rad io, etc .
- There must be no electrical contact be­
tween the vehicles as otherwise current
could already start to flow as soon as the
posit ive(+) terminals are connected. ..,. •
•

instructions of the jumper cable
manufacturer. If in doubt, call for road
service.
- Jumper cables must be long enough so
that the vehicles do not touch.
- When connecting jumper cables, make
sure that they cannot get caught in any
moving parts in the engine compart­
ment.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
<=> page 172, Engine com­
partment .
@ Note
Improper hook-up of jumper cables can ru­
in the generator.
-Always connect POSITIVE(+) to POSI­
TIVE(+), and NEGATIVE(-) to NEGATIVE
( - ) ground post of the battery manager
control unit.
- Check that all screw plugs on the battery
cells are screwed in firmly . If not, tighten
plugs prior to connecting clamp on nega­
tive battery terminal.
- Please note that the procedure for con­
necting a jumper cable as described
above applies spec ifically to the case of
your vehicle being jump started. When
you are giving a jump start to another ve­
hicle, do
not connect the negative( -) ca­
ble to the negative(- ) terminal on the
discharged battery@. Instead, securely
connect the negative (-) cable to either a
solid metal component that is firmly bolted to the engine block or to the en­
gine block itself. If the battery that is be­
in g charged does not vent to the outside,
escaping battery gas could ignite and ex­
plode!
Emergency situations 233
Emergency towing
with commercial tow
truck
General hints
Your Audi requires special handling for tow­
ing.
T he following information is to be used by
commercial tow truck operators who know
how to operate their equipment safely.
- Never tow your Audi, towing will cause
damage to the engine and transmission.
- Never wrap the safety chains or winch ca­
ble s around the brake lines .
- To prevent unnecessary damage, your Audi
must be transported with a car carrier
(flatbed truck).
- To load the vehicle on to the flat bed, use
the towing loop found in the vehicle tools
and attach to the front or rear anchorage
<=> page 234 and c:> page 235.
A WARNING
A vehicle being towed is not safe for pas­
sengers. Never allow anyone to ride in a
vehicle be ing towed, for any reason.
-
•
•

236 Emergency situations
Lifting vehicle
Lifting with workshop hoist and with
floor jack
The vehicle may only be lif ted at the lifting
points illustra ted.
F ig. 18 3 Rear lift in g poin t (ri gh t side)
Fi g. 184 Front lift in g po int (r ig ht s ide)
• Read and heed WARNI NG ¢,& .
• Locate lifting points
q fig . 183 qfig . 184 .
• Adjust lift ing arms of workshop hoist or
floor jack to match vehicle lifting points.
• In se rt a rubber pad between the floor jack/
workshop hoist and the lifti ng po ints.
If you must lift your vehicle with a floor jack
to work underneath, be sure the vehicle is safely supported on stands intended for this
purpose.
Front lifting point
The lifting point is locate d on the floor pan re ­
info rcement about at the same level as the
jac k mounting point
q fig. 184. Do not lift
the vehicle at the vertical sill reinforcement.
Rear lifting point
The lifting point is locate d on t he vertical rein ­
forcement of the lower s ill for t he on boa rd
j ac k
¢fig . 183.
Lifting with vehicle jack
Refer to ¢page 223 .
/n.. WARNING
- To reduce the risk of ser io us injury and
veh icle d amage .
- Always lift th e vehicle onl y at t he spe­
c ia l works ho p h oist and floor jac k lift
p o ints illust rated¢
fig . 183 and
¢fig. 184.
- Fa il u re t o lift th e veh icle at th ese
p oi nts co ul d cau se the vehicle to tilt or
f a ll from a li ft if th ere is a ch an ge i n ve­
h icl e weig ht distr ibu tio n an d ba lan ce.
This mi ght happen, for ex amp le, when
h eavy com ponent s such as the engine
b lock o r transmission are remove d.
- W hen removin g heavy compone nts like
these , anch or vehicle to hoist or ad d co r­
respon ding we ights to maintain t he cen­
ter of gravity. Ot herwise , th e ve hicle
might tilt or slip off the ho ist, causing
serio us personal injury.
(D Note
-Be aware o f the following points before
lifting the vehicle:
- The vehicle should never be lifted or
jacked up from underneath the engine
oil pan, the transmission housing, the
front or rear axle or the body side members. This could lead to seriou s
damage .
- To avoid damage to the underbody or
chassis frame, a rubber pad must be inserted between the floor jack and
the lift points.
- Before driving over a workshop hoist ,
check that the vehicle weight does not
exceed the permissible lifting capacity
of the hoist .
- Before driving over a workshop hoist,
ensure that there is sufficient clear­
ance between the hoist and low parts
of the vehicle.
-