2011 AUDI Q7 check engine

Checking and filling -
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<£> For the sake of the environment
Drained coolant sho uld not be reused. A lways dispose of used coolan t
w hile observing a ll enviro nmental regulations .•
Radiator fan
The radia tor fa n switc hes on a utoma tically by itself
The radiator fan is driven by the engine via the V-belt. The v iscous
cl utch reg ulates the spee d of t he fan accord ing to t he tem pera ture o f
the coolant.
An aux ili ar y e lec tric r adi ator fan* sw itches on and o ff depend ing o n
coo la nt temperat ure and other vehicle operating conditions.
After you switch the engine off, the auxiliary fan can continue r unning
for up to 10 minutes -eve n w it h t he igni tion o ff.
It can even swit ch on
again later by itse lf => & , if
• t he tem pera ture of the e ngi ne coola nt rises due to the hea t build­
up from the eng ine in the engine compa rtment, o r
• th e engine compar tmen t heats up because the ve hicl e is parked in
intense s unlight.
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan .
• The auxiliary electric fan is temperature cont rolled and can
switch on suddenly even when the engine i s not running.
• The auxiliary radiator fan switche s on automatically when the
engine coolant reaches a certain temperatu re and will continue to
run until the coolant temperature drops. •
Vehicle OP-eration
Brake fluid
Checking brake fluid level
The brake flu id l eve l can be checke d with a quick gl ance .
Fig . 238 E ngine
compa rtment : Brake
fluid rese rvoir
Before you check a nyt hin g i n th e eng ine compa rtment ,
always read and heed all WARNINGS=> & in " Working in
the e ng ine compartmen t" on
page 301 .
-Read the brake fluid level from t he bra ke flu id reservoir
=> fig. 238 . T he bra ke fluid leve l must be between the
" MIN " and "MAX" markings.
Th e brake fl uid rese rvoir is located at the rear partition of t he engine
compartment on the left side=>
page 302.
The fluid level may drop slightly after some time due to the auto­
m atic adjus tment o f th e brake pads. This is no t ca use for alarm .
If the brake fluid level falls
considerably below the "MIN" mark, t he
brake warn ing/i nd icator lig ht ( U.S. models :
BRAKE, Canadian mode ls:
ill ) will come on=> page 20 and=> page 34. Do not continue to
operate the vehicle . The complete brake system s hould be thorough ly
che cked by an au thori zed Aud i dea le r o r q ua lified wor kshop a nd the
cause corrected.
If t h e brake fl uid leve l is too low, the brake .,,_
Vehicle care Do-it-yourselt service iTechnical data

Checking and filling Ill
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Battery charging
Starting the engine requires a well charged battery.
Fig. 239 E ngine
compar tmen t: Connec ­
t ors fo r cha rger and
j umper cables
Alwa ys read and h eed all WARNINGS below=> & and => &
in "Working on the battery" on page 313 .
- Turn off the ignition and all electrical consumers.
- Make sure the area is well ventilated when you charge the
battery.
- Open the hood :::::,
page 300.
-Open the red cover on the positive pole=> fig . 239 .
- Connect the charger connectors acco rding to the instruc-
tions to the
jump start bolts . (Bolts under the red cover=
"positive", Bo lts with hex head
= "negative") .
- Only now plug the mains lead for the charging equipment into th e wall outl et and turn it on=>
&-
- Make sure the charg ing rate is not over 30 amps /14.8
Volt.
- When the battery is fully charged: Turn the charging
equipment off and remove the ma ins lead from the wall
outlet.
Vehicle OP-eration
-Now remove the clamps for the charging equipment.
- Close the red cover on the positive pole.
- Close the hood :::::,
page 301.
A discharged battery can freeze at temperatures of only O 0C. Allow a
frozen battery to thaw completely before attempting to charge it
~ & .However, we recommend not using a thawed battery again
because the battery casing can be cracked due to ice format ion and
can leak battery acid.
Battery charging (Ma xim um cha rging rate of 30
am ps/ 14.8 Vol t)
When charging at low voltages (e.g. with a tric kle c harger ), the
battery cables do not have to be disconnected first . The battery caps
sho uld
not be opened when ch arging a battery.
It is not necessary to remove the battery from the luggage com part·
ment.
F a st charging the batter y (chargin g rate above 14.8
Volt s)
For technical reasons do not use a battery charger that uses voltage
greater than 14.8 Volts to charge your vehicle's battery.
& WARNING
Charging a batt ery can be dan ger ou s.
• Alwa ys foll ow the ope rating in str uc tion s provi ded b y the
batt ery c harger manuf acturer when charging your battery .
• Never char ge a frozen battery. It ma y explode be cause of ga s
trapped in the i ce. Allow a fr ozen battery to thaw out first .
• Do not reu se batterie s wh ich were fr ozen . The batter y hou sing
m ay ha ve crack ed and w eaken ed when th e batt ery froz e.
• Charge the b attery
in a well ventilated area . Keep away from
op en flame o r el ect rica l spark. Do not sm oke . Hydrog en gas gener -
ated by the b attery is ex plosi ve. •
Vehicle care Do-it-yourselt service Technical data

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- Before you check anything in the engine compartment ,
always read and h eed all WARNINGS ::::;, & in "Working
in the engine compartment" on
page 301 .
- Lift the filler cap tongue to add washer fluid. You can fill
the contai ner to the top .
- Press the cap back onto the filler neck after filling the container.
You can find the reservoir capacity in the table in~ page 365.
To prevent lime residue from building up on the spray jets, use
distilled water when refi lling. Always add a g lass cleaner so lution
(with frost protection in the winter).
0 Note
Do not mix engine coolant antifreeze or any other additives to fill up
the windsh ie ld washer rese rvo ir .•
Safety first Vehicle care Technical data

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& WARNING (continued)
• Before you check anything in the engine compartment, always
read and heed all WARNINGS ~
page 290, "Engine compart­
ment".
0 Note
• Applying a higher voltage booster battery will cause expensive
damage to sensitive electronic components, such as control units,
relays, radio, etc.
• There must be no electrical contact between the vehicles as other­
w ise current could already start to flow as soon as the positive(+)
terminals are connected.
[ i ] Tips
• The discharged battery must be properly connected to the
vehicle's electrical system. When jump starting or charging the
battery, never connect the negative ground cable to the battery nega­
tive 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 negative ground post of the battery manager control
unit. •
Use of jumper cables
fvfake sure to connect the jumper cable clamps in exactly
the order described below!
Fig. 264 Engine
compartment: Connec­
tors for jumper cables
and charger
Fig. 265 Jump
starting with the
battery of another
vehicle: A -discharged
vehicle battery, B -
booster battery
The procedure described 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.
~

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Connect POSITIVE (+) to POSITIVE (+) (red)
- Open the red cover on the posi tive pole~ page 356,
fig . 264.
1. Connect one e nd of the pos itive cable (red) on the
jump
start bolt~
page 356, fig. 265 © (Bolts under red cover
= "positive") of the vehicle to be started @.
2 . Connect the other end to the pos itive terminal @ of the
booster battery ®·
Connect NEGATIVE(-) to NEGATIVE(-)
(black)
3 . Connec t one end to the negative te rmi nal @ of the
booster battery ®·
4. Conn ect t he other end o f the n ega tive cabl e (black) to t he
jump start bolt© (Bolts w it h hex head = "n egat ive") of
the vehic le to be s tarte d
@.
Starting the engine
- Start the engine of t he vehicle w ith the booster battery.
Run the engi ne at a moderate speed.
- Start e ng ine w it h discharged ve hicle battery in the usu al
ma nner .
- If the engine fai ls to star t: do no t ke ep the s tar ter
crank ing for lo nger than 10 secon ds. W ait for abou t
30 seco nds and then t ry again .
- Wi th engine running, remove jum per cable s from bot h
v eh icle s in t he exact
re vers e order.
- C lose the re d cove r on the positive pole.
Safety first
T he battery is vented to the outside to prevent gases from entering
t he ve hicl e inter ior. Make su re t hat t he ju mper clamps are we ll
connected with the ir
metal parts in full contact with the battery
terminals .
& WARNING
To avoid serious per sonal injury and damage to the vehicle, heed
all warnings and 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
tou ch.
• When connecting jumper cables , make sure that they cannot
get caught in any moving part s in the engine compartment .
• Before you che ck anything in the engine compartment , always
read and heed all WARNINGS~
page 290, "Engine compart­
ment ".
0 Note
Improper hook-up of j umper cab les can ruin the generator.
• Always co nnect POSITIVE(+) to POSI TIVE(+), and NEGATIV E(- )
to NEGA TIVE( -) ground post of the battery manager cont rol unit.
• Check that all screw p lugs on the battery ce lls are sc rewed in
firmly. If not, tighten p lugs prior to connecting clamp on negative
battery terminal.
• Please note that the proced ure for connecting a jumper cable as
described above applies specifically to t he case of your vehicle being
jump started . When you a re giving a jump start to another vehicle, do
not connect the negative( -) cab le to the nega tive (-) te rm inal on the
discharged battery©~
page 356, fig. 265. Instead, securely
c onne ct the negative (- ) cab le to ei ther a so lid met al componen t th at
is f irm ly bolted to the eng ine b lock or to the eng ine b lock itself. If the
ba ttery tha t is bei ng charged does not ven t to t he ou tside, escap ing
battery gas could ignite and explode! •
Vehicle care Do-it-yourself service Technical data

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- Insert a rub ber pad between the floor jack/workshop hoist
and the lift ing points .
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 lifti ng point is located o n the flo or pan reinfo rcemen t about a t
the same leve l as the jack mounting point::::;,
page 360, fig. 271. Do
not lift th e vehicle at the vertical sill reinforcement.
Rear lifting point
T he lifting po int is loc ated on the ve rtic al rei nfo rcement of the lowe r
sill for the on boa rd jack ::::;,
page 360, fig. 272.
Lifting with vehicle jack
Refer to ::::;, page 346.
& WARNING
• To reduce the risk of serious injury and vehicle damage.
- Always lift the vehicle only at the special work shop hoist and
floor jack lift points illustrated::::;,
page 360, fig. 2 71 and
::::;, page 360, fig. 272.
- Failure to lift the vehicle at these po int s could cause the
vehicle to t ilt or fall from a lift if there i s a change in vehicle
weight di stribution and balance. This m ight happen , for
ex ample, when heavy components such as the engine block or
transmission are removed.
• When removing heavy component s like these, anchor vehicle
to hoist or add corre spo nding weights to maintain the center of
gravity. Otherwise, the vehicle might tilt or slip off the ho ist,
causing serious personal injury.
Safety first
0 Note
• Be aware of the following poin ts before lifting the vehi cle:
- The vehicle should never be lifted or jacked up from under ­
neath the engine oil pan , th e tran smis sion housing , the front or
rear a xle or the body side members. Th is could lead to serious
damage .
- To avoid damage to the underbody or chassis frame, a rubber
pad mu st be inserted betwe en the floor jack and the lift points .
- Before driving over a wo rkshop hoist , check that the vehicle
weight doe s not ex ceed the permis sible lifting capacity of the
ho ist.
- Before driving ov er a work shop hoist , en sure that there is
sufficient clearance between the hoist and low parts of the
vehicle .•
Vehicle care Do-it-yourself service Technical data

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• oil cha nges, and
• cl ea ning or re placing th e air fi lter.
W For the sake of the environment
By regu larly ma intaini ng yo ur vehicl e, y ou h elp m ake su re th at em is­
sion standards a re mainta ined, t hus mi nimizing adverse effects o n
t he enviro nmen t. •
Important considerations for you and your
vehicle
Th e increas ing use of elect ronics, s ophistica ted fuel inje ct io n and
em ission cont rol systems, and t he generally increasing tec hnical
c omplex ity o f today' s automobile s, have s tea dil y re duced t he s cope
of maintena nce and repairs w hic h can be carr ied out by ve hicle
ow ners.
Also, safety and environmental c o nce rn s plac e very s trict
limits o n the nature of repa irs and adjustments to engine an d tra ns­
mission parts w hich an owner can pe rform .
M ain te nance, ad justm ents and r epairs us ua lly re quir e spec ia l t ools,
test ing devices an d other e quipment availab le to s pecia lly trained
wo rksh op pe rsonnel in order to assure pro per perfor mance, re li­
ability and safety of the vehicle and its many systems.
Impro per ma inte nance, adjustments and rep airs can im pa ir the ope r­
ation and reliability of your ve hicle and even void your veh icle
wa rranty . Therefo re, p ro of of se rvicing in a ccordance wi th t he ma in ­
t enance sch edul e may be a co nd it io n fo r u phold ing a possib le
wa rranty claim made w it h in the wa rranty pe riod.
Above all, operat io nal safety ca n be adve rsely affec ted, c reat ing
unnecessary r is ks for you and your passe ngers.
If in doubt abou t any serv ic ing, have it done by your authorized Audi
dealer or a ny o ther pro perly equipped a nd qualified workshop . W e
st rong ly ur ge you to give yo ur auth oriz e d Aud i dea ler the opportu nity
t o pe rform all sc heduled mainte na nce and necessary repairs. Yo ur
Safety first
dealer has the facilities, o rigina l parts and trained spec ia lists to keep
your vehi cle runni ng properly.
Performing limited maintenance yourself
The foll ow ing page s descr ibe a lim ite d num ber of proced ures whi ch
can be perfo rmed on your vehicle w it h ordina ry tools, shou ld the need
ar ise and tr ained pe rsonnel be u navailabl e. Befo re pe rforming any of
t hese p rocedures, always t horoughly read all of the applicable text
and ca ref ull y follow the ins tru ction s given . Alw ays rigoro usly o bserve
t he
WARNINGS prov ided .
Before you check anything in the engine compartment, always read
and heed all WARNINGS=>
& and=> & in "W orking in the engine
compartment" on
page 301.
& WARNING
• Serious personal injury may occur as a result of improperly
performed maintenance, adjustments or repairs.
• Always be extremely careful when working on the vehicle.
Always follow commonly accepted safety practices and general
common sense . Never risk personal injury .
• Do not attempt any of the maintenance, checks or repairs
described on the following pages if you are not fully familiar with
these or other procedures with respect to the vehicle, or are uncer­
tain how to proceed.
• Do not do any work without the proper tools and equipment .
Have the necessary work done by your authorized Audi dealer or
another properly equipped and qualified workshop .
• The engine compartment of any motor vehicle is a potentially
hazardous area. Never reach into the area around or touch the
radiator fan. It is temperature controlled and can switch on
suddenly -even when the engine is off and the ignition key has
been removed. The radiator fan switches on automatically when
the coolant reaches a certain temperature and will continue to run until the coolant temperature drops. ..
Do-it,yourself service Technical data

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& WA RNING (conti nu ed )
• Always rem ove the ignition key before anyone get s under the
vehicle .
• Always support your vehicle with safety stands if it i s nece ssary
to work underneath the vehicl e. Th e jack supp lied with the vehicle
is not adequate for thi s purpose and could collap se causing
seriou s personal injury .
• If you must work underneath the vehicle with the wheels on
the ground, a lway s make sure the vehicle is on level ground, that
the wheels are alway s securely blocked and that the engine cannot
be started .
• Always make sure the transmi ssion selector lever (automatic
tran smission ) is in "P " (Park po sition ) and the park brake is firmly
applied.
For the sake of the environment
• Changing the engine settings will adversely affect emission levels .
Thi s is det rimenta l to the envi ronme nt and increases fue l co nsump­
tion.
• Always observe enviro nmental regulations when disposing of old
engine oi l, used brake fl uid, dirty engine coo lant, spent batteries or
worn out t ires.
• Undep loyed a irbag modules an d pretens ioners migh t be classified
as Pe rchlorate Mater ia l -spec ial handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlorate . When the vehicle or
parts of the rest raint system includ ing a irbag modu les safety belts
w ith pretens ioners are scrapped, all applicable laws and regulat ions
must be obse rved. Yo ur author ized Aud i dealer is f amiliar wi th t hese
req uirements and we recommend that you have your dealer perform
t his se rvi ce f or yo u.•
Additional accessories,
modifications and parts
replacement
Additional accessories and parts replacement
A lways consult an autho riz ed Au di dealer bef ore
purchasing access ories.
Your vehicle incorporates the latest safety desig n featu res ens uring a
hig h standard of active and passive safety .
Th is safety co uld be compromised by non-app roved changes to the
vehicle. Fo r this reaso n, if par ts have to be replaced, p lease observe
the following points when installing addit ional accessories :
Approved Audi accessories and genuine Aud i parts are available from
author ized Aud i dea lers.
T hese dea lers a lso have the necessary fac ilities, tools and tra ined
specialists to i nstall the parts and a ccessor ies p roperly.
& WARNING
Using the wrong spare parts or u sing non-approved acces sorie s
can cause damage to the vehicle and serious personal injury.
• Use only accessories expressly approved by Audi and genuine
Audi spare parts
• These parts and accessories have been specially designed to be
used on your vehicle .
• Never install accessories such as telephone cradles or beverage
holder s on airbag covers or within the airbag deployment zones .
Doing so will increase the r isk of injury if airbags are triggered in
an accident!
• Before you check anything in the engine compartment , always
read and heed all WARNINGS~
page 290. _..