2012 AUDI A7 brake sensor

Instrument s and warnin g/indic ator ligh ts 13
Canada models:
Anti-lock braking system (ABS)
defective ./
c:>page 18
Worn brake pads
c:>page 19
Electromechanical parking brake
c:>page 74
Tire pressure mon itoring system
./
c:> page249
-pa ....,.,.. -,,
ll@l@t Tire pressure monitoring system
-
•
•
-
•
•
m
-
I!
c:>page2 49
Electronic power contro l ./
c:> page 19
Malfunction indicator Lamp (MIL)
./
c:>page19
Engine speed limitation
c:>page 20
Engine oil level
c:>page 17
Engine o il sensor
c:> page20
Battery
c:>page 16
Tank system
c:>page20
Windshield washer fluid level
c:>page20
Windshie ld w ipers
c:>page20
Remote control key
c:>page 71
Remote cont ro l key
c:> page 73
Battery in remote control key
c:>page30
-
Defective light bu lb warn ing
9 page20
Rear fog light(s)
c:>page20
Headlight range cont rol
9 page 21
-
adaptive lig ht*
¢page 21
Light-/rain sensor faulty
¢page 21
Transmission (tiptronic®)
c:>page 106
Electronic steering col umn lock
9page 17
Engine start system
c:>page 17
Ele ctrome chanical steering ./
¢page 189
-
Rear spoiler
c:>page 186
Other indicator light s
11!1 a Turn s ignals
Iii !!!9':ii ¢ page 21
~ USA models: Cruise con trol*
~ c:> page 77
• -
r!I
I
I
Canada models : Cruis e control*
¢page 77
-
Adaptive cruise control *
c:>page Bl
Adaptive cruise cont ro l*
¢page Bl
Adaptive cruise control *
¢page 81
High beam
c:>page43

18 Instruments and warning/indicator lights ;;./~ Electronic stabilization program
(ESP)
This warning/indicator light monitors the
electronic stabilization program.
When you sw itch the ignition on, the indicator
light
G1 turns on br iefly to check the function .
If the
G1 indicator lamp blinks while driving,
the ESP or ASR (Ant i- Slip Regulation) is active ­
ly regulating.
If the
ti) indicator lamp illuminates, the sys­
tem has switched the ESP off.
If the indicator light
I) turns on, the ESP was
switched to ESP sport mode with the button
[!] c> page 184. If this is case, you can reacti­
vate the ESP by switching the ignition off and
then on again. The warning/indicator light
should go out to show that the system is fully
functiona l again.
Stability program and ABS fault! See own ­
er's manual
If the indicator light DJ and the ABS indicator
light
B (USA mode ls) ;fl] (Canada models)
turn on and the message appears, there is a
malfunction in the ABS system or electron ic
differential lock. This also interrupts the ESP .
The brakes still function with their normal
power, but ABS is not active .
Drive to your authorized Aud i dealer immedi ­
ately to have the malfunction corrected .
If the battery term inals were disconnected
and re-connected, the vehicle was jump start­
ed or the battery is very weak, the ESP sensor
system goes through a learning process for
the first few yards. The warning/ind icator
l ight illuminates . Th e warn ing/ ind icator light
goes out as soon as the learning process is
comp lete.
F or more informat ion about the ESP
c>page 184.
ABS/(8) Anti-lock braking system (ABS)
This warning/indicator light monitors the ABS
and the electronic differential lock (EDL) .
The warning/indicator light B (USA mod­
els)
l ti] (Canada models) w ill come on for a
few seconds when the ign ition is switched on .
The light will go out after an automatic check
sequence is comp leted.
There is a malfunction in the ABS when:
-The warning/indicator light does not illumi­
nate when you switch the ignition on.
- The warning/indicator light does not go out
after a few seconds.
- The warning/indicator light i lluminates
while driving.
The ESP indicator light also illum inates if
there is a ma lfunction in the ABS . The mes­
sage
Stability prog ram and ABS fault! See
owner's manual
a lso appears in the instru­
ment cluster d isp lay and a warning tone
sounds .
The brake system will still respond even
without the assistance of the ABS system.
See your authorized Audi dealer as soon as
possible to restore full braking performance .
For more information regarding the ABS
~page 184.
Malfunction in the brake system
If the brake warning light c> page 14 and the
ABS warning illum inate
together there may be
a malfunction in the ABS, and there may also
be a malfunction in the brake system itself
c> .,&. . The ABS will not work and you will no­
ti ce a change in braking response and per­
formance.
In the event of a malfunction in the brake
system
the warning/ind icator light -
(USA models)/ . (Canada models) in the in­
strument cluster flashes
c> page 14.
Malfunction in the electronic differential
lock (EDL)
The EDL works together with the ABS. The
ABS wa rning light will come on if there is a

Adaptive cruis e control an d bra kin g guard 79
Adaptive cruise control
and braking guard
Introduction
App lies to vehicles: with adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regulating vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system. If the
system detects a moving veh icle up ahead,
adaptive cruise control can brake and then ac ­
celerate your vehicle . T his helps to make dr iv­
ing more comfortable both on long highway
stretches and in stop-and-go traffic.
Aud i brak ing guard can warn you about an im­
pending col lision w ith a vehicle up a head that
is slower or has s lowed down and start slow­
ing your vehicle down with the brakes
¢page 85.
Adaptive cruise control and Audi brak ing
guard have technica l limitations that you
must know, so p lease read this sect ion care­
fu lly, understand how the system works and
use them properly at all times.
General information
General information
Ap plies to vehicles: with adaptive cruise co ntrol
Fig. 81 Fr ont of th e ve hicle : sensors an d video camera
The areas that contain the radar and ultrason­
ic sensors and the video camera
¢ fig. 81
must never be covered by stickers, or other
things or coated with dirt, insects, snow or ice
that will interfe re with the adapt ive cru ise
control system and Audi braking guard . Re­
move snow with a hand brush and remove ice with a de-icing spray that does not contain
solvents.
T
he function of the Adaptive cruise cont ro l
system and A udi braking guard is limited un­
der some conditions.
- Objects can on ly be detected when they are
w ith in sensor range
¢page 81, fig. 84 .
-The system has a limited ability to detect
objects that are a shor t distance ahead,
off
to the side of your vehicle or moving into
your lane from the front or moves into your
lane from the side .
-When driving through curves
¢ page 80.
- Some kinds of veh icles are hard to detect;
for examp le motorcycles, veh icles with high
ground clearance or overhanging loads may
be detected when it is too late or they may
not be detected at a ll.
- Stationa ry objects
c::> page 80.
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injury.
- Never let the comfort and convenience
that adaptive cruise control and Audi brak ing guard offer distract you from the
need to be alert to traffic conditions and
the need to remain in full control of your
veh icle at a ll t imes,
- Always remember that the adaptive
cru ise cont rol and Aud i brak ing guard
have lim its -they will not s low the vehi­
cle down or maintain the set d istance
when yo u drive towards an obstacle or
someth ing on or near the road tha t is not
mov ing, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehi­
cles or obstacles that are not moving can
trigger a collision warning and if con­
f irmed by the video camera, an acute col­
lision warning.
- Always remember that the adaptive
cru ise contro l cannot detect a vehicle
that is driving towards you in your traffic
-
lane and that it cannot detect narrow ..,.

80 Adaptive cruise control and braking guard
vehicles such as motorcycles and bicy­cles.
- The adaptive cruise control system can ­
not detect people, animals and cannot
detect objects or traffic that crosses your
lane of travel.
- Never drive at speeds that are too fast
for traffic, road and weather conditions.
- Never use adaptive cruise control when
you cannot drive safely at a steady speed, including on winding roads or
when road conditions are poor (for exam ­
ple, in construction sites, on ice, gravel,
in fog, heavy rain or on wet roads that in­
crease the risk of hydroplan ing).
- Never follow a veh icle so closely that you
cannot stop your vehicle safely. The
adaptive cruise control cannot slow or
brake the vehicle safely when you follow
another vehicle too closely . Always re­
member that the automatic braking
function cannot bring the vehicle to a sudden or emergency stop under these
conditions.
- Never rest your foot on the accelerator
pedal, especially when the adaptive
cruise control is being used. Pressure on
the accelerator will override the adaptive cruise control braking function and pre­
vent the brakes from being applied when adaptive cruise contro l detects a situa­
tion when the brakes must be applied.
- Never use adaptive cruise control when
the radar sensors cannot accurately de­
tect vehicles moving in traffic. The radar
sensor's vision can be reduced by heavy
rain, ice, snow, heavy road spray and re­
flections from guard rails, tunnel entran­
ces, etc. These and similar conditions can
prevent vehicles from being accurately
detected and in some cases they may not
be detected at all .
- Always turn off adaptive cruise control
when entering turn lanes, exit lanes and
construction zones or in similar situa­
tions because the vehicle will automati­ cally accelerate to the stored speed when
the road ahead is clear. -
To prevent unintended operation, always
switch ACC off when it is not being used.
(D Note
The sensors can be moved by impacts or
damage to the bumper, wheel housing and
underbody. Damage in these areas could
change the way the adaptive cruise control
system and Audi braking guard work to­
gether . Have your authorized Audi dealer
check to make sure that the adaptive
cruise control system is working properly if
your vehicle had a minor frontal impact or
was damaged in the area of the sensors.
In curves
Applies to vehicles: wi th adaptive cruise control
Fig. 82 Exampl e: dri ving into a curve
When driving into a curve c:::> fig. 82 and out of
a curve, the adaptive cruise control may react
to a vehicle in the next lane and apply the brakes. You can override or prevent the brak­
ing by pressing the accelerator pedal briefly.
Stationary objects
Applies to vehicles: with adaptive cruise control
Fig. 83 Exam ple: object changing la nes a nd stat io na ry
ob ject .,..

Adaptive cruise control and braking guard 85
@ Tips
- Distance 3
is set automatically each time
you switch the ignition on.
- Your standard settings are automatically
stored and assigned to the remote con­
trol key being used.
Audi braking guard
Descript ion
Applies to vehicles: with adaptive cruise contro l
Fig. 90 Instrument cluster: approach warning
Audi braking guard uses radar sensors and a
video camera. It is active at speeds above
about 6.2 mph (10 km/h) and also works
within system limits when adaptive c ruise
control is switched off.
On vehicles w ith adaptive cru ise control and
Audi side assist (Aud i pre sense plus), system
functions also engage when a collision is im­
minent
c::> page 182.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own veh icle is traveling at a
h igh speed and approaching a veh icle up
ahead that is moving more slowly . Audi brak­
in g guard does not react if it cannot detect
the situation.
The system advises you of various s ituations:
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If
the vehicle ahead brakes sharply, you will not be able to avoid a coll is ion . The ind icator
light
I in the disp lay comes on. Take imme- diate action to avoid
the collision and in­
crease the distance to the vehicle up ahead.
- The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov­
ing much more slowly that you are or if it
brakes sharp ly. When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharply. The indicator
light
I and the symbol in the display will
warn you about the danger
c::> fig . 90 . You
w il l also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Audi braking guard w ill
intervene by braking and the message
braking
guard intervention
will appear.
- If a collision is imminent, the system will
first provide an
acute warning by braking
sharply.
- If you do not react to the acute warning, Au­
di braking guard will brake w ith increased
force in severa l stages to reduce the speed
in a poss ible collis ion. On veh icles with
adaptive cruise control and Audi side assist
(Audi pre sense plus), the system can brake
with increasing force up to maximum dece l­
eration shortly before a sensed collision
c::>page 182.
-If the Audi braking guard senses that you
are not brak ing hard enough when a colli­
sion is imminent, it can increase the braking
force.
Audi braking guard takes the driver's reaction
time into consideration in order to provide
timely warnings. The system reaction time de­
creases automatically in some situations, for
example when it detects acce lerator pedal use
or steering input . The Audi braking guard in­
tervent ion stops in certa in situations, for ex­
amp le if you press the accelerato r pedal to
pass the vehicle moving ahead of you in your
lane .
Which functions can be controlled?
You can switch Audi braking guard and the
distance/approach warning on or
off i n the
MM I ¢ page 86, Settings in the MMI.

86 Adapti ve crui se co ntrol a nd bra king guard
& WARNING
The Audi braking guard is an assist system
and cannot prevent a collision by itself.
The driver must always intervene . The driv­
er is always responsible for braking at the
correct time.
- Always pay close attention to traffic, even when the Audi braking guard is
switched on. Be ready to intervene and
be ready to take comp lete control when­
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles 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 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 only
within defined detection and range limits
that may prevent the proper detection of
other vehicles.
- 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 all.
- Reflective surfaces includ ing crash barr i­
ers or tunnel entrances may impair the
function of the radar sensor .
(D Tips
Lack of attention can cause coll is ions, oth­
er accidents and ser ious personal injuries.
- You can stop the Audi braking guard in- tervention w ith increas ing braking force
by applying the brakes yourself or by ac­
celerat ing rapidly .
- Audi braking guard error messages
.:> page 86.
Settings in the MMI
Applies to vehicles: wit h adaptive cruise contro l
., Sele ct: I CAR I function button > Car system s
contro l button > Driv er a ssis t> Audi brak ­
in g gu ard .
S ys tem -
Switch Audi braking guard On and
Off. When you switch the ignit io n on, the
message
Audi brakin g gu ard off appears in
the instr ument cluster disp lay if the system is
switched off.
Earl y wa rnin g -The distan ce and approach
warnings in the d isplay can be switched
On /
Off .
(D Tips
-Yo ur settings are automatically stored
and assigned to the remote contro l key
being used at the times the settings are
made.
- If you switch the ESP to sport mode, A u­
di braking guard switches off a utomati ­
cally¢
page 186.
Messages
Applies to vehicles: wi th adaptive c ruise control
ACC unav ailable
ACC and braking guard: unavailabl e
The system cannot detect moving vehicles up
ahead co rrectly and is sw itched off . The sen­
sors have been displaced or a re not working
properly. The Audi pre sense functions may a l­
so be affected.
ACC: unava ilable at this time. No sensor vi­
sion
A CC and b raking gu ide: un available at this
time . No sensor vision
This message appears if the sensor view is ob­
structed, for examp le by leaves, snow, heavy
spray or d irt. Clean the sensors¢
page 79,
fig. 81.
ACC: un availabl e at this time. Incline too
steep

Fuse panel@ (bl ack )
No. Equipment
Vehicle electrical system control
6 module 1, Vehicle e lectr ica l sys-
tern control module 2
7 Audi adaptive cruise control
8
Airbag control module, front
passenger 's seat sensor system
9 Gateway
Homelink (garage door opener),
10 night vision system contro
l
module
Image processing (Audi active
11 lane assist , Audi adaptive cruise
control)
12 Steering
13 Terminal 15 in the luggage com-
partment
14 Terminal 15 in the
instrument
panel (front passenger's s ide)
15 Terminal 15 engine
16 Starter
Fuse panel e (brown)
No . Equipment
1 Gateway
2 Climate control
3 ESP co ntrol module
Front door (driver's side)
5
Power seat adjustment (dr iver's
seat)
6
Steering
7 Sunroof
8
Rear door control module (driv-
er's side)
9
Lumbar suppor t (Fro nt p assen-
ger seat)
11 Sunroof, rear spoiler
12 Driver door control mod ule
Amps
5
10
5
5
5
10
5
15
30 15
4 0
Amps
5
10
10
30
7,5 35
20 1 5
5
20
1 5
Fu se s and bulb s 261
Fuse panel © (red )
No. Equipment
2 Fue l pump
3 Brake light sensor/brake pedal
sensor system
4 Engine acoust ics
5 Rear door control module (driv-
er's side)
6 Left rear seat
7 Horn
8 Win dsh ield wipe r
9 Light/rain sensor
10 L
u mbar support (dr iver seat)
11 Front passenge
r door control
module
12 Right rear door control mod
ule
Front passenger side cockpit fuse
assignment Amps
2
5
5/5
7,5 30
7,5 15
30
5
5
15 15
Fi g. 195 Fro nt passe nge r side cock pit : fu se pa nel with
p last ic bracket
Fuse panel A (black )
No. Equipment
1 Head-up D isplay
2 MMI Display
3 CD/DVD changer
Chip card reader (not in all coun-
5 tr ies)
6 Instrument cluster
Amps
5
5
5
7,5
5
5
7 Steeri ng col umn switch module 5

28 2 Index
Oil grades . ...... ..... ... .. .. .... . 218
Oil level symbol ....... ... .. .. .... .. 20
Pressure malfunction . .... ... .. .... . . 1 6
Recommended oil check intervals ..... 221
Sensor defective . . . . . . . . . . . . . . . . . . . . 20
Specification and viscos ity ... ... .. ... 218
Engine speed limitation ... .. .. .. .... . . 20
E ng ine start system (indicator lights) .... 17
Environment Break- in period ........... .. .. .... . 192
Catalytic converter ................. 193
D isposing of your vehicle battery ..... 230
D riving at high speeds ..... .. .. .. .. . 195
D riving to m inim ize pollution and no ise 194
F uel ... ...... ............. ...... . 213
F uel economy .. . ...... ... .. .. .... . 194
L eaks under your veh icle ... .. .. .. .. . 2 16
L etting the vehicle stand and warm up . 195
Proper disposal of dra ined brake fluid . 226
Proper disposal of dra ined engine coo l-
ant . .. .. .... ........ ...... ... .. . 224
Proper disposal of dra ined engine
oil . . . . . . . . . . . . . . . . . . . . . . . . . 22 1, 222
Recycl ing used engine oil ... .. .. .. .. . 22 1
Un leaded fuel ............ .. .. .. .. . 211
What should I do wi th an old ba ttery? . 230
ESP (Electronic stabilization program) Warn ing/ indicato r lights . ....... ..... 18
Event Data Recorder ( EDR) ..... .. .... . 184
E xha ust tail p ipes .......... .. .. ..... 206
Expansion tank ............. .... .... 223
Exterior lighting . .. ..... ... .. .. .... .. 41
E xterio r m irrors
Ad just ing ............... .. .. .. .. .. 47
Di mm ing . ... ............ .. .. .. .. .. 48
H eating ..... .. .. ..... ... .. .. .... .. 47
E xte rio r temperatu re d isplay ... .. .. .. . . 22
F
Fastening
Booster seats ............... ... ... 172
Conve rtible c hild safety seats ... .. .. . 170
I nfant seats ... .......... .. .. .. .. . 169
Fastening eyes . ........... .. .. .... .. 62
Fl oor mats . . . . . . . . . . . . . . . . . . . . . . . . . 123
Foot pedals . . . . . . . . . . . . . . . . . . . . . . . . 123 F
or the sake of the environment
Gasoline fumes and the environment . . 213
Red ucing engine noise by early upshift-
ing ... .... .... .. .................. 10
Refueling . ................... .... 213
Sav ing fuel by early ups hifting ...... .. 10
Fo ur-zone automatic climate control ... . 67
Front a irbags
Descrip tion ................... .... 141
How they work ................ .. .. 14 7
Frontal collis ions and the laws of phys ics 129
F ront seats . . . . . . . . . . . . . . . . . . . . . . . . . 50
Adjusting . ....................... 120
Child restraints in the front seat .. .... 139
F uel
Additives . ..... .. ... .. ..... .... . .. 211
B lended gaso line ... ... ..... ... .. .. 211
C urrent consumption ............... . 23
Economy messages (effic iency program) 24
Fuel filler flap emergency release . .... 214
Fuel filler neck . .. ................ . 212
Fuel gauge .. .. .. ... .. .. ... ..... .. . 11
Gasoli ne .. .. .. .. .. .... .... .... ... 211
Gasoli ne add it ives ............... .. 212
Low fue l level symbol .......... .. .. . 20
Octane rat ing .... .. .... .... ... .. .. 211
Recommendation .... .. ..... .... . .. 211
Ref uel ling ..... .. .. ... ..... ... .. .. 213
Reserve ... ...... ................. . 11
Tank capac ity ................. 11,272
F uses
Assignment ..... .. ... ..... ... .. .. 260
Replacing ..... .. ... .. ..... .... . .. 260
G
Garage door opener (HomeLink ®) . ... .. 115
Garment hooks . . . . . . . . . . . . . . . . . . . . . . 56
Gas discharge lamps ............. .... 263
Ga uges
E ngine coo lan t temperature . . . . . . . . . . 10
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 11
Speedometer .... .. .... .... ... .. .. . 25
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 11
Tr ip odometer .................. .. . 25
Genera l illustr ation ... .......... .. .. .. 8
Generator (warning/indicator lights) .... 16
G lossary of tire and loading terminology 232