2009 AUDI Q7 check engine

Opening and closing
Opening and closing
Keys
Key set
C !
@ Master key with remote control
Fig. 29 Key set
You can centrally lock and unlock your vehicle and start the engine
with the master key with remote control.
@Valet key
The valet key only fits the lock in the driver's door and the ignition
lock . If you have to leave the key with somebody else, you are well­
advised to turn over the valet key only.
Be aware that the rear lid and glove compartment can be opened
from inside the vehicle using the release buttons. It is therefore best
to activate the valet key function to prevent unauthorized access to
the glove compartment and the luggage compartment when
someone else has charge of your vehicle~
page 51.
© Emergency key
The emergency key is only for temporary use if the vehicle key
should be lost or misplaced ~& .
Key replacement
If you lose a key, contact your authorized Audi dealer immediately
to have the
lost key disabled. Be sure to bring all your keys with you.
Registered keys
You can check to find out how many keys have been registered to
your vehicle. Therefore, when buying a used vehicle, make sure to
get all of the remote keys belong to it.
Calling up the registered keys~
page 76.
Data in the master key
While you are driving, service and maintenance relevant data are
being continuously stored on your master key. Your Audi service
adviser can read out these data and tell you about work that is
needed on your vehicle. This also applies to vehicles with Conve­
nience key*.
L1}. WARNING
• Do not leave your vehicle unattended with the key in the igni­
tion lock. Entry by unauthorized persons could endanger you or result in theft or damage the vehicle. Always lock all doors and
take the key.
• Do not leave children unattended
in the vehicle, especially with
access to vehicle keys. Unguarded access to the keys provides
children the opportunity to start the engine and/or activate vehicle
systems such as the power windows etc. Unsupervised operation
of any vehicle system by children can result in serious injury.
[ i] Tips
• If you open the driver's door with the key left in the ignition lock,
a chime will sound. This is your reminder to remove the key and lock
the door.
~

Child safety lock
Power child safety lock for the rear doors t
The power child safety lock prevents the rear doors from
being opened from the inside.
Fi g. 46 Sectio n fro m
dr ive r's door: co ntrols
T he rear doors ar e equip ped with a power child safe ty lock .
It is operated with t he two safety buttons(!) in the driver's
door=} fig. 46.
- Press the left and/or right safety button to disable t he
rear p ower window(sl and preve nt the respective rear
door from being opened from t he inside. The LED in the
button will light up when the chi ld safety lock is tur ned
on .
- Press the ill umina ted butt on aga in t o turn the child
safety f eatures
off .
When the chi ld safe ty lock is activated, the interior door opening
lever is inoperative; the door can only be opened from the ou tside .
In addi tion, the window regulator for that door is a lso inoperative
when the child safety lock is activated.
If the child safety lock has been activated on one or both sides, the
buttons in the rear for the Panoramic slid ing sunroof* are disabled.
Con tro ls and eq uip­
ment
Op ening and clo sing
If the child safety lock has been activated on the left and on the right
s ide, the rear controls are locked on vehicles with rear air -condi ­
tioning *. Dashes"--- " are shown in the disp lays for the rear c limate
controls, and the rear air -conditioning can only be operated fro m
the climate controls in the cabin=>
page 131.
[ i ] Tips
• In order to activate the child safety lock on the left and the rig ·h t
side, you have to press the two safety buttons in succession .
• Make certain that the check l ight comes on in the corresponding
safety switch when the child safety lock is activated. •
Convenience key
Applies to veh ic les: wit h Convenie nce key
Description
Access and vehicle operation based on: Master key remains in driver's p ocket.
The Convenience key veh icle authorization system allows keyless
unlocking, locking and starting of the vehicle . You only have to carry
t he master key on your person .
It makes no difference whether the master key is in your jacket
pocket or in you r brief case . As soon as you app roach your vehicle,
the Convenience key recognizes the request for access , checks for
authori zation and enables the following functions :
• Unlocking the vehicle=>
page 62.
• Locking th e vehicle => page 63.
• Switching on ignition and star ting the engine by pressing the
[ S TAR T] button; the master key does not have to be in the ignition
switch =>
page 144 . ~
Vehicle care I I irechnical data

Opening and closing
H ow is th e a nti-th eft alarm s yste m swi tched off ?
The anti -theft alarm sys tem is switched off only whe n you un lock
your vehicle. If you do not open a door within 60 seconds after you have un locked with the remote control , the vehicle will lock itself
again automatically.
When will the anti -th eft alarm syst em be trigg ered ?
When the vehicle is locked, the alarm system monitors and protects
the following parts of the vehic le:
• engine compartment
• luggage compartment
• doors
• ignition
When the system is activated, the alarm will be triggered if one of
the doors, the engine hood or the rear lid are opened, or if the igni ­
tion is turned on. The anti-theft alarm system will also go off when
the battery is disconnected.
You can also trigger the alarm by pressing the PANIC button on your remote control. This will alert other peop le in case of emergency .
Press the
PANIC button again to turn off the alarm.
How i s the anti-theft ala rm switched off w hen
triggered ?
The alarm system is switched off when you unlock the vehicle or
when the ignition is swi tched on . The alarm w ill a lso switch itself off
when it comes to the end of its cycle.
Emergen cy flasher and h orn
The emergency flasher will blink briefly and the horn sounds when
the doors, engine hood and rear lid are properly closed .
If the emergency flashers do not b link, or the horn does not sound,
check the doors, engine hood and rear lid to make sure they are
properly closed . If you close a door, the hood or the rear lid with the
anti -t heft a larm switched on, the e mergency flashers wi ll blink and
the horn will sound only after you have closed the door or lid .
[ i ] Tips
Fo r the anti-theft a larm system to function proper ly, make sure a ll
vehic le doors and windows are closed before leaving the vehicle. •
Power windows
Controls
Switch es for fr ont do or wind ows
© operates the window in the driver 's door .
Fig . 4 9 Driv er's do or:
po we r win dow
sw itch es
@ operates the window in the front passe nger's door .
Swit c hes for r ear win dows
© operates the left rear window .
@ operates the righ t rear w indow.
Safet y switch
© Safety switch for rear window operation .
& WARNING
• Do not le ave children un attended i n the vehicle , e speci ally with
ac ces s to vehicle key s. Un sup ervi sed use of the key s ca n re sult in .,_

Clear vision
Lights
Switching the headlights on and off ·'t!-·
In the "AUTO" position, a light sensor* automatically
switches the head- and taillights on and off in response to
light conditions.
Fig. 60 Instrument
panel : light switch
The light switch must not be overturned past the stops in
either direction.
Switching on automatic headlight control
-Turn the light switch to AUTO=> fig. 60.
Switching on the side marker lights
-Turn the light switch to ~oo:.
Switching on the headlights and high beam
-Turn the light switch to ~D.
- Push the high beam lever forward towards the instru-
ment panel=>
page 77.
Contro ls and eq uip­
ment
Switching off the lights
- Turn the light switch to 0. Clear vision
The headlights only work when the
ignition is switched on . While
starting the engine or when switching off the ignition, the head ­
lights will go off and only the side marker lights will be on.
After starting the engine, the headlights are automatically adjusted* to the load and angle of the vehicle (for example, during
acceleration, braking). This prevents oncoming traffic from experi­
encing unnecessary headlight glare from your headlights.
If the system is not operating properly, a warning symbol in the
Auto -Check Control is displayed
=> page 37.
With the side marker lights or headlights switched on, the symbol
next to the light switch illuminates
coo:.
Daytime running lights
• USA models:
On vehicles with xenon lights the daytime running
lights will come on automatically when the ignition is turned on and
the light switch=> fig. 60 is in the
O position or the AUTO position
(only in daylight conditions). The
Daytime running lights function
can be turned on and off in the MMI menu
Exterior lighting
=> page 74. On vehicles with halogen fights, daytime running lights
can be activated by your authorized Audi dealer=>
f.1.
• Canada models: The daytime running lights will come on auto ­
matically when the ignition is turned on and the light switch
=> fig. 60 is in the O position or the AUTO position (only in daylight
conditions)
=> /.1 .
Automatic headlight control*
In the switch position AUTO the automatic headlight control is
turned on . The low beams and tail lights are turned on automatically
through a light sensor as soon as ambient brightness (e.g . when
driving into a tunnel) falls below a value preset at the factory. When ..,_
Vehicle care I I irechnical data

Clear vision
Wint er p osition
To speed up de -icing of the windshie ld w ipers, they move to the
winter position when the ignition is switched off and at an outside
temperature below 39 °F (4 °C). In this position, the windshie ld
w ipers are in an area on the glass which is reached by the air vents
below the glass . It is a lso easier to remove snow and ice from the
windshield wipers in this position .
The wipers leave the winter position, when the ignition is switched on, if the wi ndshield wiper lever is ope rated or the active rain
sensor* reacts to moisture.
Rain sen sor*
The rain sensor operates only in the interval wiper position. When it
s tarts to rai n, the interval wiper m ode is ac tivated aut omatically.
If the windshield wiper lever is in the interval wipe position with the
igni tion switched off, the rain sensor is not activated unti l vehic le
speed is above 4 mph (6 km/h).
To reduce the sensitivity of the rain sensor, the switch@ must be
moved down . T o in crease the se nsitivity of the rain sens or, the
switch must be moved up .
The higher the sensi tiv ity se tting, the so oner the w indshield wipe rs
react to mo isture on the windsh ield. Increased sensitivity is
signa led by the windshie ld wipers making a single pass over the
windsh ield.
The rain sensor wiper intervals depend on the sensitivity setting as
we ll as veh icle speed . D uring b rie f stops, wiper m otio n will adjust in
relation to the amount of rain on the windshield .
& WARNING
• Wiper blades are cru cial for safe driving! Only when they are in
good condition are they able to clear the window s proper ly to
p rovide un comp romised visibil ity . Worn or damaged wiper blades
are a safety hazard =>
page 84, "In stalling new wiper blades "!
& WARNING (continued )
• The rain sensor* is only designed to assist and support the
driver . It remain s entirely the dr iver' s re spon sibility to monitor
out side weather conditions and to manually activate the wipers as
s oon a s rain or driz zle reduce s vi sibility through the wind sh ield .
0 Note
In freezing o r near freez ing conditions:
• Always check that the wiper blades are not frozen to the glass
before you turn the wipers on. Loosen a wiper blade which is frozen
in place before operating the wipers to prevent damage to the wiper
blade or the wipe r motor.
• Do not use the wipers to clear a frosted window. Using the
wipers as a convenient ice scraper wi ll destroy the wiper blades .
• Before you ta ke you r vehicle to an automatic car was h, ma ke s ure
you have the windshield wiper system switched off (lever in position
0), otherwise the windshield wiper system could get damaged in the
car wash if it should sudden ly come on .
[ i ] Tips
• The rain senso r* is part of the interva l wiping syste m. Turning o ff
the ignition will also deactivate the rain sensor. To reactivate the
s en sor, switch o ff the interval wip ing funct ion, then sw itch it bac k
on again.
• Worn or dirty winds hield wiper b lades cause smearing which
can affect the operation of the rain sensor *. Check the condition of
your windshield wiper blades regularly .
• Make sure the washer fluid reservoir in the engine compartment
is topped o ff be fore go ing on a long trip. Look up=>
page 346 for
check ing and filling the washer container. •

The ASR works in conjunction with the ABS. If a malfunction should
occur in the ABS, the ASR wil l also be out of action.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i ] Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identica l tires. Any differences in rolling radius of the tires can
cause the system to reduce engine power when this is not desired.
See also~
page 359, "New tires and rep lacing tires and wheels". •
Braking
General information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending large ly on operating conditions and driving habits~& .
On vehicles that are either driven mostly in stop-and-go city traffic
or are driven hard, the brake pads shou ld be checked by your autho ­
rized Audi dealer more often than specified in the
Warranty & Main­
tenance booklet.
Failure to have your brake pads inspected can
result in reduced brake performance.
On steep slopes, you shou ld use the braking effect of the engine .
This way, you prevent unnecessary wear on the brake system. If you
must use your brakes, do not hold the brakes down continuously.
Pump the brakes at intervals.
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
Moisture
or road salt
If you are driving faster than 3 1 mph (50 km/h) and the windshield
wipers are on, the brake pads will briefly touch the brake discs in
regular intervals so as to improve reaction time when braking on
wet surfaces. You, the driver, will not notice anything.
Under certain conditions, for example, when driving through water
or very heavy rain, or even after washing your vehicle, the braking
effect can be reduced due to moisture (or in freezing conditions ice)
on the brake pads. A few careful brake applications sho uld dry off
the brake pads or remove any ice coatings .
The effectiveness of the brakes can be reduced when the vehicle is driven on a salt -covered road and the brakes are not used. Here too,
you should clean off accumulated salt coating from brake discs and
pads with a few carefu l app lications of the brake ~& .
Corrosion
There may be a tendency for dirt to build up on the brake pads and
corrosion to form on the discs if the car is not driven regularly or
only for short trips with litt le use of the brakes.
If the brakes are not used frequently, or if corrosion has formed on
t he discs, it is advisable to clean off the pads and discs by braking
firm ly a few times from a moderately high speed~&.
Faults in the brake system
If you shou ld notice a sudden increase in brake peda l trave l, then
one of the two brake circuits may have failed~& .
Low brake fluid le vel
Malfunctions can occur in the brake system if the brake fluid level is
too low . The brake fluid level is monitored electronically .
Brake lining wear status
Brake lining wear may be checked by visual inspection of the condi ­
tion of the brake pads through the openings in the wheel. If neces­
sary, the wheel may be removed for this inspection
~ page 373,
"Changing a whee l" . ._.
Vehicle care Do-it-yourself service Technical data

If an individual wheel begins to rotate too slowly in relation to
vehicle speed and tends to lock, the ABS automatically reduces
brake pressure to prevent that wheel from locking.
This automatic adjustment process will cause a
slight vibration of
the brake pedal and some noises to alert you that vehicle speed
must be adapted to existing road and traffic conditions .
_& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tire traction. Always adjust your driving
speed according to the road and traffic conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra risks.
The ABS cannot overcome the laws of physics.
[ i] Tips
• If ABS is not functioning properly , a warning light will come on .
See
=> page 22.
• If a fault occurs in the ABS, the EDL is also not functioning. This
is indicated by the ABS warning light.•
Brake assistant
The brake assistant is designed to achieve the optimum
braking effect.
The brake assistant helps to increase the effective braking power
and thus to achieve
a shorter stopping distance . If the driver
presses the brake pedal very quickly , the brake assistant automati­
cally boosts the braking force to the maximum level, up to the point
where the anti-lock brake function (ABS) intervenes to stop the
wheels from locking. You should then keep th e brake pedal pressed
until the vehicle has braked to the required speed. The brake assis­
tant swi tches its elf off as soon as you release the brake pedal.
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
Automatic full braking assist
This function allows full braking
in spite of high brake pedal forces
(e.g . when the brakes are severely stressed because the vehicle is
fully loaded) . The driver notices this function through a reduction of
pedal force and increased pedal travel. When the brake pedal is
released, full braking assist switches off again automatically.
If there is an ABS failure, the brake assistant and automatic full
braking assist ar e not available .
The brake assistant will not be operative if there is a malfunction in
the ABS.
_& WARNING
Please remember that the accident risk always increases if you
drive too fast, especially in corners or on a slippery road, or if you
follow the vehicle ahead of you too closely . Increased risk of an
accident cannot be compensated for even by the brake assistant,
so always maintain a safe speed. iJ
Servotronic® -advanced power
steering system
The power steering systems uses the power of the
running engine to allow precise steering with little effort.
The advanced Servotronic ® power steering system senses the road
speed and electronically adjusts power assistance to provide
comfortable and safe steering response exactly matched to the
vehicle speed.
Power steering will not work if the engine is off. As a result, the
s teering whe el will be hard to turn.
The power steering fluid level is checked during the scheduled
maintenance services .
•
Vehicle care Do-it-yourself service Technical data

lffll __ ln_ t _e_ ll-'"ig ...,_ e_ n_t _t_ e_ c_ h _ n_o _ l_o _,.g= y,_ __________________________________________ _
0 Note
If there is an electronic malfunction, servotronic will still function
like a conventional power steering system, providing a constant
steering support force that is no longer proportionate to the vehicle
speed. This is most noticeable when turning the steering wheel at
low speeds ( for example when parking), - more effort will be
required than usual.
• Be aware of the different than usual steering response and
adjust your steering force accordingly.
• Have the problem checked and set right by an Audi dealer as
soon as possible.
[ i] Tips
• When the engine is running, never hold the steering wheel
turned all the way to the right or to the left for longer than 15
seconds . Th e power steering pump will overheat the hydraulic fluid
if you keep holding the steering wheel turned all the way. This is
likely to damage the power steering system .
• If the power steering system should fail entirely, or if the engine
is not running (for example, while being towed), you will still be able
to steer the vehicle. However,
considerably more effort will be
required to do so.
• If the power steering system should have a leak, or is not func­
tioning properly, contact your authorized Audi dealer immediately.
• The power steering system requires a specially formulated
hydraulic fluid. The power steering reservoir is the one located
farthest to the rear on the left side of the engine compartment
=>
page 332. The correct fluid level in the reservoir is important for
proper functioning of the power steering. •
Driving with your quattro®
---------
With All Wheel Drive, all four wheels are driven.
General information
With All Wheel Drive, power is distributed to all four wheels. This
happens automatically depending on your driving style and the
road conditions at the time. See also=>
page 290, "Electronic differ ­
ential lock (EDU" .
Winter tires
When driving in the winter, your vehicle with All Wheel Drive has an
advantage, even with regular tires. In winter road conditions it may
be advisable to mount winter tires (or all-season tires) for improved
driveability and braking: these tires must be mounted on
all four
wheels .
See also=> page 363, "Win ter tires".
Tire chains
Where tire chains are mandatory on certain roads, this normally
also applies to vehicles with All Wheel Drive=>
page 364, "Snow
chains".
Replacing wheels/tires
Vehicles with All Wheel Drive must always have tires of the same size. Also avoid tires with different tread depths. For details see
page=:>
page 359, "New tires and replacing tires and wheels".
& WARNING
Always adjust your driving to road and traffic conditions. Do not let the extra safety afforded by All Wheel Drive tempt you into
taking extra risks .
• Although the All Wheel Drive is very effective, always
remember that braking capacity is limited by tire traction. You
should therefore not drive at excessive speeds on icy or slippery
road surfaces .
~