2013 AUDI Q7 brake sensor

Audi braking guard
Description
Applies to vehicles: with a daptive cruise co ntrol
Audi braking guard warns you of a possible
collision with a moving vehicle up ahead .
Fig. 146 Display in the instrument cluster
The Audi braking guard is active from a speed
of approx. 20 mph (30 km/h) and works with­
in the system limits¢
page 125 even when
the adaptive cruise contro l is deactivated.
A radar sensor is bu ilt into the front of the ve­
hicle
¢page 114, fig. 127. The system is in­
tended 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 sit ­
uation, for example, whe n a vehicle up ahead
in your lane of trave l sudden ly brakes or when
your own vehicle is moving at high speed to­
wards a much slower vehicle up ahead . As
soon as the system senses that a possible col­
lision with the vehicle up ahead can only be
avoided by immed iate full brake application or
by an avoidance maneuver, a warning appears.
The system has a defau lt response time to be
able to signal before a collision occurs. This
system response time is automat ica lly re­
duced if you acce lerate actively, fo r example
to join a highway. Braking, transverse acceler­
ation and the steering angle can lead to a re­
duced system response time. The warning is
deactivated if you begin to overtake with full
acceleration .
Adaptive cruise control 127
The system can make you aware o f two differ­
ent hazardous situations:
Distance
The distance warning is given if the system
calculates that there is not enough distance
to the vehicle up ahead a period of more than
S seconds . If the distance is less than 30 feet
(9 meters) at SO mph (80 km/h), for examp le,
an optical display comes on in the instrument
cluster¢
fig. 146.
If the vehicle ahead brakes sharp ly, Audi brak­
ing guard cannot help you to avoid a collision,
even in the case of an immediate response.
Take immed iate action to avoid the co llision
and increase the distance to the vehicle up
ahead.
Speed
If there is a much slower vehicle moving up
ahead in your lane, or if the vehicle ahead
brakes sharply, the Aud i brak ing guard calcu­
lates the po int from which a collision can only
be avoided by full braking or by an avoidance
maneuver. If a warning does sound, a poss ible
collision with the ve hicle in front can on ly be
avo ided through an evasive maneuver or by
braking.
The warning is given in two stages :
-Pre-warning: A visual display appears in the
instrument cluster and a warning tone
sounds.
- Acute warning: If you do not respond to the
pre-warn ing, the second stage warning is
given. A quick brake application helps to di­
rect your attention to the road and traffic
situation.
Under heavy braking, the brake ass istant
¢
page 114 also helps you benef it from maxi­
mum brak ing efficiency.
A WARNING
Inatt ention can cause collisions, other ac­
cidents and serious personal injuries.

128 Adapti ve crui se co ntrol
-Always pay close attenti on to t he traffic,
even w hen the Aud i brak ing guard is
switched on. The Aud i b rak ing guard pro­
vides a warning but does no t brake the
car for you . You m ust apply t he brakes
yours elf!
- Always ke ep the sa fe and legal distance
betwe en your vehicle and veh icles up
ahead.
-Audi braking guard works within limits and w ill not respond outs ide the system
limits, for examp le when approaching a
stopped vehicle or s tationary obstacle
(end of a traff ic jam or veh icle that has
broken down in traffic).
- Always remember th at the radar sensor
f or the A udi braking guard wo rks within
defined detection and range limits that
may prevent the proper detection of oth­
er veh icles.
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. Moving vehicles up ahead may not
be promptly detected or may not be de­
tected at al l.
- Always pay careful attention to the traf­
fic s ituation and be ready to intervene
and be ready to take comp lete control
whenever necessary.
- Reflective surfaces includ ing crash barri­
ers or tunnel entrances may impair the
function of th e radar sensor .
Settings in the MMI
Applies to vehicles: with adaptive cruise control
The settings of the Audi braking guard are
performed in the MMI.
.. Se lect :
ICARI fu nct ion button> Systems *
control button > Audi braking guard . Or
.. Se lect:
I CARI funct ion button > Car sys­
tems *
control button > Driver assist > Audi
braking guard .
- System -
the Audi braking guard system can
be switched
On and Off .
-Early warning -the acoustic warning and
the messages can be switched
On and Off .
(D Tips
When handing ove r the keys to another
person, the p revious settings are adopted
i f the Audi braking g uard is activated
¢ page 43.
Driver's information in the instrument
cluster display
Applies to vehicles: with adaptive cruise contro l
Braking guard activated
Th is message appears when the Aud i b ra ki ng
guard applies the brakes du ring a second
st age (a cute) war ning .
Braking guard off
This message appears when the system has
been deac tivated via the MMI. This message
also appea rs br iefly at each beginn ing of a t rip
i f t he sys tem is swi tched off .
This message also appears when the system is not available because of a malfunct ion or if
E SC is switched to the Off road
mode ¢ page 225. The system can no longe r
war n of an impending coll is io n.

Intelligent technology Notice about data
recorded by vehicle
control modules
Your vehicle is not equipped with an Event Da­
ta Recorder (EDR), installed by some manu­
facturers for the express purpose of capturing
data for retrieval after an accident or crash
event. EDRs are sometimes called "crash re­
corders".
Some state laws restrict the retr ieval or down­
loading of data stored by EDRs that were in­
stalled 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 with a number of electron­
ic control modules for various vehicle systems
such as, for example, engine function, emis­
sion control, as well as for the airbags and
safety belts.
These electronic control modules also record
vehicle-related data during norma l vehicle op­
eration for diagnostic and repair purposes.
The recording capacity of the electronic con­
trol modules is limited to data (no sound is re­
corded) and only a small amount of data is ac­
tually 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 we ll as restraint
system use and performance in the event of a
crash or other condition. Stored data can only be read and downloaded with special equip­
ment.
Intelligent technology 225
Electronic Stabilization
Control (ESC)
General information
The ESC improves the vehicle stability.
. ..---------..
------- -
Fig. 232 Center console with ESC sw itch
ESC is designed to help you maintain vehicle
control in situations where the car approaches
the limits of "grip", especially when accelerat­
ing and cornering. ESC reduces the risk of
skidding and improves stability under all road
condit ions .
The system operates across the entire speed range in combination with the ABS system. If
the Anti-Lock Brake System (ABS) malfunc­
tions, the ESC will also shut down.
How the system works
The Anti-Lock Brake System (ABS), Electronic
Differential Lock (EDL) and the Anti-Slip Regu­
lation System (ASR) are integrated in the Elec­
tronic Stabilization Control. In addition to the
data prov ided by these functions, the ESC con­
trol unit requires additional measurement da­
ta provided by high performance sensors. The
rotational speed of the vehicle about its verti­
cal axis, vehicle acceleration in the fore-and­
aft and lateral directions, the brake pressure and the steering angle are all measured.
T he direction in wh ich the driver wishes to
travel is determined with the aid of the steer­
ing angle and vehicle speed and is continually
compared with the actual behavior of the ve­
hicle. If the two do not match, for example,
when the vehicle starts hydroplaning on a wet
road, ESC will automatically brake the appro-
priate wheel to correct the problem. ..,_
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-Stability is limited in the ESC offroad
mode.
Electronic differential lock (EDL)
The electronic differential lock monitors the
rotational speed of the drive wheels .
General notes
The electronic differentia l lock (EDL) helps the
car to start movi ng, accelerate and climb a
gradient on surfaces providing poor or almost
no grip. Without EDL, this would be difficult,
if not impossible.
H ow the system works
The ED L opera tes automatically. It monitors
the rotat iona l speed of wheels w ith the help
of the ABS sensors¢
page 229. If a noticea­
b le
slip is detected at the wheels (e .g. on slip ­
pery ground
on one side), the spinning 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 s ignal that wheel sp in is being
controlled.
Dri ving off
When driving off, always be sure to keep road
conditions in mind as you accelerate. If one
drive wheel spins because it is on a surface
w ith less gr ip, apply
plenty of throttle until
the car starts to move.
O verheating of br akes
To prevent the disc brake of the braked wheel
from overheating if subjected to excessive
loads on this wheel, the EDL cuts out tempo­
rarily . T he vehicle remains operational and be­
haves in the same way as a veh icle w ithout
E DL.
As soon as the brake has cooled down, EDL
switches on again automatically .
A WARNING
-When accelerating on slippery surfaces,
such as on ice or snow, always be carefu l
when depressing the acce le rator pedal.
Int ellig ent technolog y 22 7
Even with the EDL working, the drive
wheels can spin and red uce your ab ility
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 driving style to
the road condit ions and traffic situation .
(D Tips
If a fault occurs in the ABS, the EDL is also
not functioning. This is ind icated by the
ABS warning light¢
page 18.
Anti-Slip Regulation System (ASR )
The Anti-Slip Regulation System prevents the
driven wheels from spinning when the car is
accelerating .
General note s
The Anti-Slip Regu lation System (ASR) is inte­
grated in the Electronic Stabilization Control
(ESC). When the vehicle starts up and acceler­
ates, the wheels are prevented from spinning
by adjust ing the engine power to match the
amount of grip available from the road sur­
face .
How the sy stem works
ASR performs automat ically, i.e. without the
driver's intervention. With the aid of the ABS
sensors ¢
page 229, ASR monito rs the speed
of the dr iven wheels .
If the wheels start to
spin, engine torque is red uced automat ically
unt il the t ires find enough grip to lock onto
the ro ad surface. The system is active across
the entire speed range.
T he ASR works in conjunction with the ABS. If
a malfunc tion s hou ld occu r in the ABS, the
ASR wi ll also be out of act io n.
A WARNING ~
The increased safety affo rded by ASR does
not mean that you can take safety risks.
A lways adapt your driving sty le to the road
conditions and traffic situation.
Ill--
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Engine coolant system ............... 271
Adding coolant .............. ... ... 273
Checking coolant level ........ ... .. . 272
Checking the engine coolant level .. .. . 272
Malfunction ............. .... .. .... 32
Radiator fan ................ ... ... 274
Engine coolant temperature Temperature gauge .......... ... .. .. 10
Engine data .. .. ........... .. .. .. ... 322
Engine hood Closing .. ............ ...... .... .. 264
How to release the hood ...... .... .. 264
Engine oil . .. ............. .... .. ... 266
Adding .. .. .. ........... .. .. .. ... 270
Additives . .. ............. .... .. .. . 270
Changing .. ................ ... ... 270
Checking the engine oil level .. .. ... .. 269
Consumption . .. .. .... ... .. .. .. .. . 268
Indications and conditions requiring ex-
tra checking ............. .... .. .. . 269
Oil grades . ................. ... ... 266
Recommended oil check intervals . ... . 269
Specification and viscosity ... ... .. .. . 266
Engine oil level .................. .... 36
Engine oil pressure Malfunction ................ .... ... 33
Engine oil sensor defective ... ... .. .... 36
Engine speed limitation ....... .. .. .. .. 36
Entry assist Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . 7 5
Environment Break-in period .............. ... ... 234
Catalytic converter ........ .. .. .. .. . 235
Diesel particulate filter .... .. .. .. .. . 235
Disposing of your vehicle battery .. .. . 279
Driving at high speeds .......... .... 236
Driving to minimize pollution and no ise 236
Fuel ... .. .. .. .. ........... .. .. ... 259
Fuel economy ............ .... .. ... 236
L eaks under your vehicle ... .. .. .. .. . 264
Letting the vehicle stand and warm up. 236
Proper disposal of drained brake fluid . 275
Proper disposal of drained engine cool-
ant . .... .. .. ............. .. .. ... 273
Proper disposal of drained engine oil . . 270
Recycling used engine oil ....... ... .. 270
Unleaded fuel ............... ... ... 256
What should I do with an old battery? . 279
Index 335
EPC
refer to Electronic power control . . . . . . 15
ESC
refer to Electronic Stabilization Control
(ESC) ..... .. .. .. ................. . 16
Event Data Recorder (EDR) . .......... . 225
Exhaust tail pipes Cleaning .. .. .. .. .... ............. 250
Expansion tank .. .. .... ........... .. 272
Explanation of some technical terms ... 238
Exterior lighting in the mirror housing 59
Exterior mirrors
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . 68
Dimming .. .... .. .. . ............... 69
Heating ..... .... .. ................ 68
Eyeglasses compartment .............. 89
F
Fall line
Fan
Four-zone automatic comfort air condi- 238
tioning ... .... .. .. . ............... 98
Radiator .... .. .... ............... 274
Fastening Booster seats .................... . 213
Convertible child safety seats ....... . 212
Infant seats 211
Flat tire
Changing ........................ 304
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . 170
Fog lights ... ... .. .. ................ 58
Folding chocks .. .. .... ......... .... 301
Folding master key with remote control . . 38
Foot pedals ......... ............... 170
For the sake of the environment Gasoline fumes and the environment .. 259
Letting your engine warm up ...... .. 106
Reducing engine noise by early upshift-
ing ........ ..... .. . ............... 10
Refueling ........................ 259
Saving fuel by early upshifting ..... .. . 10
Using the rear window defogger .. .. .. . 95
Four-zone automatic comfort air condi-
tioning ....... .. .... ................ 97
Automatic mode in rear ............ .. 98
Heated rear seats . . . . . . . . . . . . . . . . . . 101
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Convenience closing ......... .. .. .. .. 55
Emergency closing . . . . . . . . . . . . . . . . . . 56
sliding open . . . . . . . . . . . . . . . . . . . . . . . 54
Sunshade . . . . . . . . . . . . . . . . . . . . . . . . . 56
tilt ing ... .. ................. .. .... 54
P ark ing ..... .. .. .. .. .... ... .. .. ... 110
Automatic transmission ... .. .. .. .. . 137
Caution when parking near a parking bar- rier or curb . ............. .... .. ... 110
Low bumper cover, spoi lers and suspen-
sion ..... ... ...... ............. .. 110
Parking brake . .... ..... ... .. .. .. ... 109
Parking .... .. .... .... ... .. .. .. ... 110
Warn ing/ indicator lights ... .. .. .. .. .. 19
P ar king on a decline (downhill) . .. .. .. . 110
Park ing on an incline (uphill) ..... . ... . 110
Parking systems . ... .... ... .. .. .. ... 143
Ad justing the disp lay/warning tone .. . 153
Aud i parking system plus with front- and
rearv iew camera . . . . . . . . . . . . . . . . . . . 148
Aud i pa rking system plus with rearv iew
camera . ... ... .. .. ...... .. .. .. .. . 144
C lean ing senso rs/camera .. .. .. .. .. . 247
M alfunc tion ................ ... .. . 153
Rear p ark assist .......... .... .. .. . 14 4
Safety precautions . . . . . . . . . . . . . . . . . 14 5
T railer hitch . ..... .... ... .. .. .. ... 153
P art icle filter
refer to Diesel particula te filter . . . . . . . 3 7
Parts rep lacement ......... .. .. .. .. . 327
P ASSENGER AIR BAG O FF light ... .. .. . 195
P assenge r's seat . . . . . . . . . . . . . . . . . . . . . 72
Passive safety system ....... .. .. .. .. . 165
P ed als .... .. ................. ..... 170
Perimeter light ing ...... .... ... ... ... 59
Physica l princ iples of a frontal coll is ion . 176
P olishing .. .. ............. .... .. ... 2 48
Pollen filter Climate controls . . . . . . . . . . . . . . . . . . . . 91
P owe r locking switch . . . . . . . . . . . . . . . . . 4 4
P owe r locking system ....... ... .. .... . 41
Conve nien ce close/open feat ure . .. .... 53
L o cki ng and unlocking the vehicle from
ins ide ..... .. ... .. ..... ... .. .. .... 4 4
Opening and clos ing the windows . ... .. 53
Rear lid/trunk lid . ..... ... .. .. .. .. .. 45
Remote control key . . . . . . . . . . . . . . . . . 38
Inde x 339
Selective unlock feature ..... ... .. .. . 44
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 44
U nlocking and locking vehicle . ... .. .. . 43
Power out lets . . . . . . . . . . . . . . . . . . . . . . . 87
Power seat Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Seat adjustment . . . . . . . . . . . . . . . . . . . . 72
Power steering .. ................... 230
Power w indow switches .......... .... . 51
In the driver's door . . . . . . . . . . . . . . . . . 52
In the front passenger's door . . . . . . . . . 53
Reactivating the system . . . . . . . . . . . . . 54
Pregnan t women
Spe cial consider ations w hen wear ing a
sa fe ty belt . . . . . . . . . . . . . . . . . . . . . . . 180
Programming the HomeL ink® u niversa l re-
mote control ...... .. . .. ... .... .. ... 161
Proper occupant seating positions ... .. 166
P roper safety belt posi tion ............ 18 0
Proper seating position Front passenger .. .. .. .. ...... ... .. 167
Occupants . .. .. .. .... ........... .. 166
Rea r passenger s ................... 168
Protective tray . . . . . . . . . . . . . . . . . . . . . . .
82
Q
quattro ®
refer to All-wheel drive
231
Ques tion
What happens to unbelted occupants? 177
Why safety be lts? . .. .. .. ..... ... .. 175
R
Radiator fan . ..... .. . .. .. ..... ... .. 274
Rain senso r . . . . . . . . . . . . . . . . . . . . . . . . . 63
Rain sensor defective . . . . . . . . . . . . . . . . . 35
Re ading ligh ts
F ron t ....... .. .. .................. 61
Rear ... .. .. .... .. . .. .. ..... ... .. . 61
Rea r asht ray .. .. .. .. . .. .... .... .. .. . 86
Rear fog lights .. ................... . 59
Re ar li d
Au tomat ic operation . .. ..... ... .. .. . 46
Emergency unlocking . .. ..... ... .. .. . 48
Opening and closing . .. ..... ... .. .. . 45
Valet key funct ion ................. . 41
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