2011 AUDI Q7 brake sensor

ffl..__A_ d_a_ p,__ t_iv _ e_ C_r _u _ i_ s _e _ C_ o_ n_t _ r_ o _ L ___________________________________________ _
Applies to veh icles : with Adapt ive C ruise Contro l
When driving around curves
Entering a curve
Fig. 144 Vehicle
entering a curve
Fig. 145 Vehicle
leaving a curve
When entering a curve, the Adaptive Cruise Control may react to a
vehicle in the next lane and apply the brakes in your vehicle
::;, fig. 144. The braking action can be overridden by depressing the
accelerator pedal.
Leaving a curve
At the end of very long curves, AC C's predictive lane reading can cause
ACC to react to another vehicle in the next lane and apply the brakes
on your vehicle::;, fig. 145. The braking action can be overridden by
depressing the accelerator pedal. •
Applies to veh icles : with Adaptive Cruise Control
Vehicles offset to one side
i
----------------- .. i
Fig. 146 Vehicle trav­
eling ahead outside
the detection range of
the radar sensor
Vehicles moving up ahead but offset in the lane cannot be detected
by ACC until they are in sensor range.•
Applies to veh icl es: with Adapt ive Cruis e Contro l
Lane changes by other vehicles
Fig. 147 A vehicle
changes lanes
Vehicles that cut into your lane a short distance in front of you cannot
be detected by ACC until they are in sensor range .•

-Adaptive Cruise Control •m.____...,__ _____________ _
The Audi braking guard is active from a speed of approx. 20 mph
(30 km/h) and works within the system limits=>
page 149 even when
the Adaptive Cruise Control is deactivated.
A radar sensor is built into the front of the vehicle=>
page 138,
fig. 132. The system is intended to measure the distance to reflective
surfaces. If a measurement is not possible, the system does not
respond.
When the measurement has been taken, the system can recognize a
possibly hazardous situation, for example, when a vehicle up ahead in
your lane of travel suddenly brakes or when your own vehicle is moving at high speed towards a much s lower vehicle up ahead . As
soon as the system senses that a possible collision w ith the vehicle up
ahead can only be avoided by immediate full brake application or by
an avoidance maneuver, a warning appears.
The system has a default response time to be able to signal before a
collision occurs. This system response time is automatically reduced
if you accelerate actively, for example to join a highway . Braking,
transverse acceleration and the steering ang le can lead to a reduced
system response time . The warning is deactivated if you begin to
overtake with full acceleration.
Th e system can make you aware of two different hazardous situa­
tions:
Distance
T he distance warning is given if the system calculates that there is not
enough distance to the vehicle up ahead a period of more than 5
seconds. If the distance is less than 30 feet (9 meters) at 50 mph (80
km/h) , fo r example, an optic al disp lay comes on in the inst rument
cluster=> fig. 151.
If the vehicle ahead brakes sharply, Audi braking guard cannot he lp
you to avoid a coll is ion, even in the case of an immed iate response.
T ake immediate action to avoid the collision and increase the
distance to the vehicle up ahead.
Speed
If there is a much s lower vehicle moving up ahead in your lane, or if
the vehicle a head brakes sharply, the Audi braking guard calculates
the point from which a collision can only be avo ided by full braking or
by an avo idance maneuver. If a warn ing does sound, a possible co lli­
sion with the vehicle in front can only be avoided through an evasive
maneuver or by braking.
The warn ing is given in two stages:
• Pre-warning : A visual display appears in the instrument cluste r
and a warning tone sounds .
• Acute warning: If you do not respond to the pre-warning, the
second stage warni ng is given . A quick brake application helps to
direct your attention to the road and traffic situation .
Under heavy braking, the brake assistant=>
page 138 also helps you
benefit from maximum braking effic iency.
& WARNING
Inattention can cause collisions, other accidents and serious
personal injuries.
• Always pay close attention to the traffic , even when the Audi
braking guard is switched on. The Audi braking guard provides a
warning but does not brake the car for you. You must apply the
brakes yourself!
• Always keep the safe and legal distance between your vehicle
and vehicles up ahead.
• Audi braking guard works within limits and will not respond
outside the system limits, for example when approaching a
stopped vehicle or stationary obstacle (end of a traffic jam or
vehicle that has broken down in traffic).
• Always remember that the radar sensor for the Audi braking
guard works within defined detection and range limits that may
prevent the proper detection of other vehicles. _,.,

lillill.a._...:I:..: n~ t .::.e::::..::.: ll~igent technology ,_ _______________________________________ _
Intelligent technology
Notice about data recorded by
vehicle control modules
Your vehicle is not equipped with an Event Data Recorder (EDR),
installed by some manufacturers for the express purpose of
capturing data for retrieval after an accident or crash event. ED Rs are
sometimes called "crash recorders".
Some state laws restrict the retrieval or downloading of data stored
by ED Rs that were installed in a vehicle for the express purpose of
retrieving data after an accident or crash event without the owner's
consent.
Although your vehicle is not equipped with an EDR, it is equipped w ith
a number of electronic control modu les for various vehicle systems
such as, for example, engine function, emission control, as well as for
the airbags and safety belts.
T hese electronic control modules also record vehicle-re lated data
during normal vehicle operation for diagnostic and repair purposes .
Th e recording capacity of the e lectronic control modu les is limited to
data (no sound is recorded) and only a sma ll amount of data is actu­
ally recorded over a very limited period of time and stored when a
system fault or other condition is sensed by a control unit. Some of
the data then stored may relate to vehicle speed, direction, braking
as well as restraint system use and performance in the event of a
crash or other condition. Stored data can only be read and down­
loaded with special equipment.
Electronic Stabilization Program
(ESP)
General information
The ESP improves the vehicle stability.
Fig. 222 Center
console with ESP
switch
ESP is des igned to help you maintain vehicle control in situations
where the car approaches the limits of "grip", especia lly when accel­
erating and cornering. ESP reduces the risk of skidd ing and imp roves
stability under all road conditions.
Th e system operates across the entire speed range in combination
with the ABS system. If the Anti-Lock Brake System (ABS) malfunc­
tions, the ESP will also shut down.
How the system works
The Anti-Lock Brake System (ABS), Electronic Differential Lock (EDL)
and the Anti-Slip Regulation System (ASR) are integrated in the elec­
tronic stabilization program. In addition to the data provided by
these funct ions, the ESP control unit requires additional measure­
ment data provided by high performance sensors. The rotational
speed of the vehicle about its vertical axis, veh icle acceleration in the ...

Intelligent technology
'-----------------------------------------------
& WA RNING (conti nu ed )
• Plea se be aware th at in ESP offroad mode , particularly on a
s mooth and slippery road, the wheels may have an incr eased
tendency to spin and the vehicle may break awa y -danger of skid ­
ding!
• Stabilit y is limited in the ESP offroad mode. •
Electronic differential lock (EDL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differe ntia l lock (EDL) helps the ca r to sta rt moving,
acce lerate and climb a gradient on surfaces provi ding poor or almost
no grip. W ithout ED L, th is would be d iff ic ul t, if not impossible .
How the system works
The EDL operates automatically . It mo nitors the rotational speed of
w heels wi th the help of the ABS sensors ==>
page 260. If a not iceab le
slip is detected at the wheels (e .g . o n slippery g round on one side),
the spin ning whee ls are braked and power is transferred to the other
wheels. This is done up to a speed of about 60 mph ( 100 km/h) .
Noises from the brake system signa l that wheel spin is being
cont rolled.
Driv ing off
W hen d rivi ng off, always be sure to keep road conditions in mind as
you acce lerate. If one drive wheel spins because it is on a surface with
less grip, apply
plenty of th rottle until t he car starts to move .
Overheating of brakes
To prevent the disc b rake of the bra ked wheel from overhea ting if
subjected to excessive loads on this whee l, t he EDL cuts out tempo ­
ra rily. The vehicle rema ins operat iona l and behaves in the same way
as a veh icle without EDL. As soon as the brake has coo
led down, EDL sw itches on again auto­
m atically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accele rator pedal. Even
with the EDL working , the drive wheels c an spin and reduce your
ability to control your car . Risk of crash!
• The increased safety afforded by EDL does not mean that you
can take safety risks . Always adapt your d riv ing style to the road
c ondition s and traffic situation.
[ i ] Tips
If a fa ult occurs in the A BS, the ED L is also no t fu nct io ni ng. This is
ind icated by the ABS warn ing light==>
page 19. •
Anti-Slip Regulation System (ASR)
The Anti- S lip Re gula tion System preven ts the drive n
w heels from spin ning wh en the car is acc ele rating .
General notes
The Anti-S lip Reg ulation Sys tem (ASR) is in tegr ated in the ele ctroni c
stabilization program (ESP) . When the ve hicle starts up and acceler­
a tes, the whee ls are p reven ted from sp inning by adjust ing t he engine
power to match the amoun t of grip ava ilable from the road surface.
How the system works
ASR performs automatica lly, i.e. witho ut the driver 's intervent ion.
With the aid o f th e ABS sensors ==>
page 260, ASR moni to rs the speed
of the driven wheels. If the whee ls start to spin, engine torque is
reduced automatically unt il the tires find enough gri p to lock onto
the road s urface. The system is active ac ross the en tire speed range .
'1>

___________________________________________ A_ l::.. p _h _a_ b_ e_t _ic _a_ l_ in_ d _ e_x __ _
Oil grades ...... ....... ..... .. .. . 303
Recommended oil check intervals ... 305
Specification and viscosity ......... 303
Engine oil level ...................... 40
Engine oil pressure
Malfunction ........ .... .. .. .. .. .. 36
Engine oil sensor defective ............. 40
Engine speed limitation ............... 40
Entry assist
Rear seats ......... ...... .. .. .. .. 91
Environment Break-in period .. .. .............. 265
Catalytic converter . .. ... ... .. ..... 266
Diesel particulate filter ... .. .. .. .. . 267
Disposing of your vehicle battery ... . 316
Driving at high speeds .......... .. . 268
Driving to minimize pollution and noise . 267
Fuel ............... ...... .. .. .. . 294
Fuel economy ............... ..... 267
Leaks under your vehicle .......... . 301
Letting the vehicle stand and warm up ..
268
Proper disposal of drained brake fluid 312
Proper disposal of drained engine coolant 310
Proper disposal of drained engine oil 306,
307
Recycling used engine oil ......... . 306
Unleaded fuel ........... .... .... 291
What should I do with an old battery? ...
316
EPC
See Electronic power control ........ 16
Controls and equip­
ment Safety first
ESP
See Electronic
stabHization program (ESP)
16
Event Data Recorder (EDR) . ... ..... ... 256
Exhaust tai l pipes
Cleaning ...................... .. 285
Expansion tank .. ........... .. .. .. .. 309
Explanation of some technical terms ... 270
Exterior lighting in the mirror housing . .. 70
Eyeglasses compartment .... ......... 109
F
Fall line ...... ...... .... .. .. .. ..... 270
Fan Four -zone automatic comfort air
conditioning ................... 119
Radiator ................ .. ... ... 311
Fastening Booster seats ............ ...... .. 241
Convertible child safety seats ..... .. 239
Infant seats .. ................... 238
Filler flap ... .. .. .. ..... ... .... ... .. 298
Flat tire Changing . ... ................... 343
Floor mats ....................... .. 196
Fog lights ................. .. .. .. .. . 69
Folding chocks .. ... ....... ......... 340
Folding master key with remote control .. 42
Foot pedals ..... .. ................. 196
For the sake of the environment
Gasoline fumes an d the env ironment 294
Letting your engine warm up .. ..... 127 Reducing engine
noise by early upshifting
10
Refueling ... .. .. .. .............. 294
Saving fuel by early upshifting ....... 10
Using the rear window defogger .... 115
Four-zone automatic comfort air conditioning 118
Automatic mode in rear . .......... 119
Heated rear seats ...... ..... .. .. . 122
Rear air distribution ..... .. .. .. .. . 119
Rear controls ............ ... .. ... 118
Rear fan ............ .... ... ..... 119
Rear operation ...... ...... .. .. .. . 121
Reartemperature ............. .. . 119
Synchron ization .. .. ............. . 120
T urning on/off ................... 118
Front airbags Description .. .. .... ............. . 215
How they wo rk ...... ...... .. .. .. . 220
Front fog lights .......... .... .. .. .. .. 69
Front seats ......................... 85
Adjusting ....................... 193
Child restraints in the front seat ... . 213
Frontal collisions and the laws of physics 202
Fuel Additives ................ ...... . 291
Blended gasoline ................. 291
Consumption ........ . ... ... .. ... . 26
Filler neck . .. .. ... ... .. ...... .... 293
Fuel gauge .. .... .. .. .. ........... 12
Gasoline ........... .. .. .. .... .. . 291
Gasoline additives .. .............. 292
Low fuel leve l . . . . . . . . . . . . . . . . . 12, 39
Octane rating ....... .. .... .. .. ... 291
Vehicle operation Vehicle care Do-it-yourself service Technical data

Alphabetical index 11111 ___________________________________ ____._ _______ _
Ventilatio n
Climate controls ......... ... ..... 111
w
Warning lights . ............ .... ... .. 14
Warning/indicator lights ... ... ... ... .. 10
Adaptive Air Suspension . .. . .... .. .. 18
Adaptive Cru ise Contro l ......... .. . 145
Airbag system ................ .. .. 17
Anti-lock brake system (ABS) ........ 19
Brake system ............ ... ..... . 20
Cru ise control ............ .... ..... 19
E lectronic power cont rol . .... .. ... .. 16
E lectro nic stabil ization p rogram ( ESP) . 16
Glow pl ug sys tem ... .... .. .. .. .. .. 16
H igh beam ......... ...... .. ...... 19
Mal fu nction Indicator Lamp ( MIL) .... 17
Par king brake ..... ....... ... . ... .. 20
Safety belt . ....... .. .. ... .. .. .. .. 18
T ir e pressure monito ring system ... .. 19
Trailer turn signa l assembly ......... 17
Turn s ignals ............ .... .. .... 17
Wa rran ty cover ages . ......... .... .. . 3 68
Washer reservo ir ... ....... ... ... ... . 3 16
Washing . ....... ... .. .. .. .. .. .. .. . 278
Automatic car wash ...... .. .. .... . 279
by hand ...... ...... .. .. .. ... ... . 2 79
General informat ion .... .......... 278
w ith a power washer ........... .. . 280
Waxing .... ..... ... .. .. .... .. .. .. . 281
Wea r indicator . .. .... ..... ..... . .. . 328
Weatherstrips .. ........... ...... .. . 283
Controls and equip­
ment Safety first
We
ights .. .. .. .. .. .... .. .. ... ..... . 363 Defrost ing ... ... .. .. .... ... ... .. 115
What happens i f you wear your safety be lt too Rapid defrosting/defogg ing ........ 116
loose? ..................... ... 206 Win dshield washer flui d
What happe ns to unbelted occupants? . . 203 Low level ... .. .. .. ..... ....... ... 39
W hat impairs driv ing safety? . ....... .. 191
What should I do after changing a wheel? . .
32 5
What should I do after replac ing whee ls? .. .
32 5
Wheel bolts To rque .... .. ........... ...... .. 336
W heels .. .. .. .. ... ................ 318
Cast a lloy .. .. .. .... .. ... .... .... 284
Checking tire pressure ............. 324
Cold tire infla tion pressure ......... 322
General notes ........ .. .. .. .. ... 318
Glossa ry of tire and loading terminology .
319
New tires and whee ls ............. 330
Ti res and vehicle load limits . .. .. ... 326
W hen m ust a safe ty be lt be rep laced? . . 20 4
When m ust the a irbag system be inspected?
222
When should I adjus t th e tire press ures? 325
When should I check t he t ire pressures? . 325
Where a re lower anchorages loca ted? .. . 24 8
Whe re can I find the tire pressures fo r my car?
32 4
W hy safety belts? ........... .. . 201, 202
Windows Clean ing ... .. .. ...... .. .. .... .. . 283
Convenience close/open feature . ..... 60
Defogging ...... ... ... .......... 115 W
inds hield wipers
Changi ng the rear w ipe r blade ....... 79
Fa ulty .. ........... ...... .... .. .. 41
I nte rm it t ent wi ping .. .. ... .. . ... .. 74
One -tap wip ing . ... .. .. ... .. ... ... 74
Rain sensor ... .. .. ... ... ..... .... 74
Rear window wiper ...... ..... ... .. 76
Service position .. .. ............... 77
Washer reservo ir . .. ............. . 316
Winter ope ra tion
Battery ... .. ... .... . ..... .. .. .. . 312
Coolant system ...... .. ... .. .. .. . 308
Heated rear seats .......... ... .. . 122
Steering wheel heating .. .......... 123
Tires . ......................... . 262
Windows ... .. ................ .. 283
Winter ti res .. .. ... .. .. .. .. .. .. .. .. . 33 4
All-whee l drive ....... ... ...... .. . 334
W iper blades
I nsta lling new wiper b lades ....... .. 78
See also Windsh ie ld wipers . . . . . 78 , 79
X
Xeno n-Lig hts . .. ...... ............. . 3 54
y
Yellow symbols . .. .. .. ....... .. .. .. .. 3 7
Vehicle operation Vehicle care Do-it-yourself service Technical data