2011 AUDI A3 brake sensor

Engine oil sensor malfunction =>page35
._ -
Engine speed limitation =>page34
Diesel particulate filter =>page34
Worn brake pads =>page35
USA models : =>page35 Speed warning 1
Canada models: =>page35 Speed warning 1
USA models : =>page35 Speed warning 2
Canada models: =>page35 Speed warning 2
!! Dynamic headlight range control*
defective
=> page35
Con tro ls a nd e quip ­
m en t
Windshield washer fluid level low => page35
Battery voltage too high or too low => page 35
Defective light bulb =>page36
USA models : =>page36
Defective brake light
Canada models : =:>page36
Defective brake light
Light/rain sensor defective (auto-
=> page 36
matic headlights)* defective
Tire pressure monitor ing system*
=> page 36
Vehicle OP-eration
Driver information display
When a yellow symbol appears, a warning tone will sound once.
Check the displayed function as soon as possible . If more than one
malfunction is detected, all symbols will appear one after the other
for about two seconds .•
Driver information
In addition to the warning/indicator lights and the
symbols in the instrument cluster display, driver informa ­
tion is displayed .
-~ a:.. CD m
Fig. 24 Section of
instrument cluster:
Set/Check button
Driver information appears in the display when a defective light bulb
is reported by the defective light bulb warning=>
page 36, when the
brake pads are worn and before you engage a gear on vehicles w ith S
tronic .
In addition, driver information may appear when a red symbol flashes
in the driver disp lay.
To display Drive r information
As an example, the~ symbol appears in the display . If you now
press the button => fig. 24, the following driver message appears in
the disp lay:
Switch off engine and check oil level
The driver message in the display goes out afte r about 5 seconds. You
can display the driver message again by br iefly pressing the button .•
Vehicle care Do-it-yourselt service iTechnical data

Engine oil sensor defective,:., 1ioo
If the ~ symbol illuminates, contact your authorized Audi dealer
and have the oi l senso r inspected. •
Worn brake pads ,
Brake pads!
If the warn ing lig ht i llum inates, immediately contact your authorized
Audi dea ler or qu alified wor kshop to have all b rake pads insp ected.
On USA mode ls the warn ing light ,,, comes on together w it h the
warning light
BRAKE . Both sets of brake pads on an axle must a lways
be rep laced at the same time .
& WARNING
Driving with bad brakes can c ause a collision and serious personal
injury .
• If the warning light land the warning light
BRAKE1> with the
me ssage Brake pads! comes on in the in strument cluster di splay,
immediately contact your author ized Aud i dealer or qualified
workshop to have all brake pad s checked or replaced if
necessary. •
....
Speed warning 1 _, (USA
models)/ ...... (Canada models)
If the :J symbo l ill uminates, this means you are driving faster than
t he set vehicle speed. Slow down!~
page 28. •
ll BRAKE : USA mode ls on ly
Controls and equip ­
ment Safety first
Driver information display
Speed warning 2
) (USA models)/ (Canada models)
If the symbol i llum inates, this means you have d riven faster than
t he second set ve hicle speed . S low dow n!~
page 28. •
App lies to vehicles : wit h dyn am ic head ligh t ra ng e ad justmen t
Headlight range control defective r!>
If the > illuminates, the dynamic headlight range cont rol is no
longer work ing prope rly. Have the system checked and repaired at
your authorized Aud i dea ler. •
Windshield washer fluid level too low ~
If the -., symbo l ill uminates, add windshie ld washer fluid to the
was he r system ~
page 24 3. •
Battery voltage low
If the O symbol illum ina tes, contact yo ur authorized A udi dea ler and
have the fo llowing components inspected:
• drive be lt
• battery charge
Also see i f th e gener ator w arning/ind ic a tor ligh t illumina te s
~page 15 .•
Vehicle care Technical data

Driver information display
Defective light bulb warning
The defective light bulb warning tells you when a vehicle
light bul b has become defective .
If a defective bu lb has been detected by the system or a light bulb
burns ou t, the symbo l w ith a message appea rs in the display to te ll
you which bulb is burnt out and where it is located. For example:
Rear left turn signal
After 5 seconds, the message d isappears . If you want to recall the
message into t he disp lay, press the CHECK button ::::,
page 8, fig. 2
® ·
There are three reasons w hy the defective bulb message would
appea r in the d ispl ay :
• The light bulb has burnt out::::,
page 285 .
• Th e fuse is "b lown" ::::, page 281, "R ep laci ng fuses".
• The wire connect io n to the light bulb is defective.
Have the bu lb rep lace d or the connec tion repa ired by your au thor ize d
Audi Service department.
& WARNING
• Light bulbs are pressurized and could e xplode while they are
being changed cau sing seriou s personal injur y.
• Work with due care when handling the high-voltage section of
ga s di scharge (xenon ) lamp s. Failing to do so could re sult in death
or se rious injury !•
Brake light defective B • urn (USA
models)/ (Canada models)
In case of a malfunct ion or component fai lure, the symbol
(USA models)/ (Ca nada models) can appea r. The following elec· trical components should be checked
, repaired or rep laced, as neces­
sary:
• Brake ligh t bul bs
• All wiri ng connec tions
• Brake light switch
C on tact your au thorized A udi deale r for assistance if necessary .
(I) Tips
The brake light switch is on ly inspected as part of the functional check
after the engine is sta rted .•
A pplies to veh icles: w ith au toma tic head ligh ts
Light/rain sensor defective
The indicator light indicates a defec t in the automatic
headlights/automatic wi per system.
If the symbo l ill umina tes, the ligh t se nso r has failed. Fo r safety
reasons, the low beams are turned on permanen tly with the sw itch in
AUTO . However, you can continue to t urn the lights on and off using
the light sw itch . In the case of a defec t in the ra in se nsor, the wi nd­
shield wiper lever functions are still avai lab le . Have the light/rain
s ensor che cked as soon a s poss ible at an a uth oriz e d Au di dea le r.•
A pp lies t o veh icles : wit h tire p ressure mon itoring system
Tire pressure monitoring system )
Tire press ure that is too lo w m ust be correc ted as soon a s
possible.
If the symbo l flashes for about one min ute after the igni ­
tion is sw itc hed on and then re m ain s on, t here is a malfu nc­
tion i n the syste m. Co nsu lt the neares t au thori zed Aud i
d ealer a s so on as possib le.
~

Intelligent 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 retrieva l after an accident or crash event. ED R's are
sometimes called "crash recorders".
Some state laws restrict the retrieval or downloading of data stored
by ED R's 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 contro l 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
The Electronic Stability Program increases driving
stability .
With ESP, contro l over the vehicle is increased in situations when the
vehicle is close to the limits of grip, such as dur ing accelerat ion and in
curves. ESP reduces the risk of sk idding and improves vehicle stability
unde r all road conditions.
It operates at all speeds.
The Anti-Lock Brake System (ABS), Electronic Differential Lock (EDS) and Anti-Slip Regulation System (ASR) are integrated in the Elec­
tronic Stability Program .
How ESP works
The ESP control unit processes the following data from high-sensitive
sensors: the rotationa l speed of the vehicle about its vertical axis,
fore-and -aft and lateral acceleration forces, brake pressure and
steering angle .
Us ing stee ring ang le and vehicle speed, the direction the driver
wishes to travel is determined and continuously compared with
actual vehicle behavior. If the two do not match, for example when
the vehicle beg ins to skid, ESP brakes the appropriate whee l auto­
matically.
The vehicle is stabilized aga in by the forces act ing on the whee l
during braking. With an oversteering veh icle (tendency for the rear
end to skid out of the curve), the brake app lication is mainly at the
front wheel on the outside of the curve, with an understeering vehicle
(tendency to run wide in the curve) at the rear wheel on the insid e of
the curve or additionally at the other wheels as needed. This brake
application is accompanied by noises. _,

Intelligent technologyL ______________________________________ _
the drive wheels on one axle is detected (e.g . on slippery ground on
one side),
the spinning wheel is braked, thereby transferring power to
the other drive wheel or wheels (all -wheel drive) . This is done up to a
speed of about 60 mph (100 km/h). Noises from the brake system
signal that wheel sp in is being controlled .
Driving 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 with
less grip, gradually increase the pressure on the accelerator pedal
until the car starts to move. The wheel less ab le to transfer power
spms .
Overheating of brakes
To prevent the disc brake of the braked wheel from overheating if
subjected to excessive loads, the EDL cuts out temporarily. The
vehicle remains operat ional and behaves in the same way as a vehicle
without EDL .
As soon as the brake has cooled down, EDL switch es on again auto­
matically.
Electronic limited slip differential*
In vehicles w ith front wheel drive*, an electronic lim ited slip differen­
tial engages when driving on curves. The brakes are applied spec ifi­
cally to the front wheel that is on the inside of the curve. This mini­
m izes sliding on the front wheels and enables precise and neutral
driving through curves. The electronic limited slip differential does
not engage when d riving in wet conditions or snow.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL and the ele ctronic limited slip differential working,
the drive wheels can spin and reduce your ability to control your
ca r. -Risk of crash!
& WARNING (continued)
• The increased safety afforded by EDL and the electronic limited
slip differential does not mean that you can take safety risks .
Always adapt your driving style to the road conditions and traffic
situation.
[I) Tips
If a fau lt occurs in the ABS, the EDL is also not f unct ioni ng. This is
indicated by the ABS warning light=>
page 16.
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Sl ip Regu lation System (ASR) is integrated in the electronic
stabili zation program (ESP) . When the vehicle starts up and acceler­
ates, the wheels are prevented from sp inning by adjust ing the engine
power to match the amount of grip available from the road surface.
How the system works
ASR performs automatica lly, i.e. without the driver's intervention.
With the aid of the ABS sensors=>
page 192, ASR monitors the speed
of the driven wheels. If the wheels start to spin, the engine torque is
reduced automatically until the tires find enough grip to lock onto
the road surface. The system is active across the entire speed range.
The ASR works in conjunction with the ABS. If a malfunction shou ld
occur in the ABS, the ASR w ill also be out of action .
[I) Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identical tires. Any differences in rolling radius of the tires can .,

_______________________________________________ F_u _s_ e_ s_ a_ n_ d_ b_u _ l_ b _ s __ _
Equipment No. II Equipment
Amps
Manual headlight beam adjustment, automatic Diagnostic connector, rain sensor, air condition-
headlight beam adjustment, AFS control mod-
16 ing (control module), tire pressure monitor dis-10
1 ule, engine components, light switch (switch 10 play (control module)
-lig hti ng/i llum i nation), diagnosis socket 1 7 Ant i-theft alarm warning system 5
Automatic transmission, control module for CAN 18 Diagnose Starter 5
data transfer (gateway), electro-mechanical
19 All Whee l Drive 10 steering, shift gate automatic transmission, 2 10 engine relay, fuel tank control unit, engine con-22 Blower fan 40
trol unit, brakes control (ABS), Electronic Stabili-23 Driver's side power window, front 30 zation Program (ESP), Anti-Slip Regulation (ASR)
3 Airbag 5 24 Power outlet front 20
Air-conditioning (pressure sensor, air quality sen-25 Rear window defogge r 30
sor), button for Electronic Stabilization Program 26 Power outlet in luggage compartment 20
(ESP), Anti-Slip Regulation (ASR), tire pressure 27 Fuel tank control module, fuel pump 15
monitor display, oil level sensor, back-up light
28 Power window, rear 30 4 switch, front seat heating, parking aid, seat-s
occupancy recognition (on USA vehicles), garage 33 Sliding/pop-up roof 20
door opener, automatic mirror dimming, head-
Lumbar support
10 light assistant, heated windshield washer noz-
zles, air conditioning (control module)
3 7 Hea ted seats, front 20
--
5 AFS headlights (left side) 5 38 Passenger side power window, front 30
AFS headlights (right side) 5 39 Specia l function interface 5
9
Navigat ion system, radio system 15 40 Starter 40
digital radio, cell phone, TV equipment 7,5 Rear window wiper 15
11
Automatic mirror dimming, headlight assistant 10 Body control module 20
12 Central locking (front doors) 10 47 Ce ll phone package (VDA interface) 5
13
Central locking (rear doors) 10
A uto m atic c ircu it bre ake rs :
14 Electronic Stabilization Program (ESP) (control 10 The electric power w indows and the electric seat adjusters are
module), shift gate automatic transmission protected with circuit b reakers which reset automatically after the
1 5 Inter ior lights, read ing lights 10 circuit overload has been corrected . ...
Safety first Vehicle care Do-it-yourself service Technical data

lffll.,___F_ u_ s_e _ s_ a_n_d _b_u _ l_ b_s _______________________________________________ _
(I) Tips
• Whenever replacing a fuse, always consult the sticker on the
i ns ide of the fuse panel cover. It contains the most up-to-date infor ­
mation regarding the fuse arrangement . If in doubt , ask your autho ­
rized Audi Service advisor.
• Some of the equipment items listed are optiona l or only available
on certain model configurations. •
Fuse location, left side of engine
compartment
Fig. 196 Engine
compart ment: fuse
assignment
Please check your car's fuse layout, there are two different layouts.
Check the fuse layout with the fuse panel cover removed~
page 281,
"Fuse cover in engine compartment ".
Some of the equipment items listed are optional or only available on
certain model configurations .
Please note that the preceding table was accurate at the time of
printing and is subject to change . In the event of discrepancies, the
label on the inside of the cover always takes precedence .
No. Equipment
Fl Terminal 30
F2 Engine components
F3 Batteryvoltage
F4 ESP valves, Anti-lock brake system (ABS) valves
FS Transmission control module
F6 Steering wheel electronics
FlO Engine control module, main relay
Fl2 Control module for CAN data transfer (gateway)
Fl3
FlS
Fl6 Engine
control module
Ignition coils, engine components (diesel engine)
Preheating control module/engine component,
tank diagnosis, oxygen sensor
Body control module (right)
F l7 Ho rn
Fl8 Audio amplifier
Fl9 Front
windshield wiper system
F20 Water pump, volume regulator valve
F21 Oxygen sensor, vacuum pump
F22 Clutch pedal switch, brake light switch F23 engine components, water pump
F24 Engine components, water pump
F25 Pump (ESP/ABS), ABS va
lve
F26 Body control module (left)
Amps
40
20
s
20/30 15
5
5/10
5
15/25/30
20
5/10 30 15
30
30
10/20
10/15
5
5/10/15 10
40 30

__ _:._A..:. l:.! p:.. h ::....:..:: a:.:b:.. e=-= t.:..:ic :.:a:.. l:.....:..: in~ d:...:e :..: x.:...._ ___________________________________________ _
A
ABS
See Anti-lock brake system ........ 192
AC (air conditioner) .. ... ....... ...... 97
Accessories ................ .... .. .. 301
Adapter for anti -theft wheel bolts . .... 27S
Adding Engine coolant ... ............... 236
E ngine oil ....................... 232
Windshield washer flu id ........ ... 243
Additional accessories .. ............. 301
Add itional heater
Climate controls ................. 102
Additives Engine oil .. .. .. .. .. .. .... .... ... 232
Adjustable steering wheel column . .... 105
Adjusting Steering wheel column . .. .. .. ..... 105
Adjusting front seats .............. .. . 73
Advanced Airbag System Components ............. .... ... 152
Fr ont airbags . .. ................. 150
How the components work together . 153
Monitoring .. ................. .. 156
PASS ENGER AIR BAG OFF light .. ... 157
Air conditioner ....... ............... 97
See also Climate controls ....... ... . 95
Air conditioning Switching on and off ..... .......... 97
Air distribution Climate controls .. .... ... ...... .. 100 Air outlets
Adjusting the outlets for rapid
defrosting/defogging ........... 101
Climate controls ............... .. 101
Air quality sensor .................... 99
Air recirculat ion .......... ... ... ... . 100
Climate controls . . . . . . . . . . . . . . . . . . 99
When shou ld I use the air recirculat ion? ..
99
Air rec irculat ion mode Side curtain airbags .
........... .. 164
When must the system be inspected? 156
All Wheel Drive .. .... .. ........... .. 194
Alloy wheels ............ .... ..... .. 212
All-wheel drive Winter t ires .. .. .... ..... ..... . .. 261
Alternator
See Genera tor ........... .. .. .. .. . 15
Aluminum alloy whee ls ....... ... .. .. 212
Ambient lighting .............. ...... 62
Climate controls .................. 99
6
Anti-glare inside day-night mirror.
. . . 3, 64
Airbag
Anti-lock brake system
Warning/indicator l ights . .. .. .. .. .. 15 k
How the ABS system wor s .. .... .. 192
Ai rbag System
Warning/indicator lights ... ........ 16
Weight-sensing mat ... .... .. ..... 168 ( )
Anti-Slip Regulation System ASR
Airbag system ................ .. 145, 162 H th t k l90
ow e sys em wor s ........ ... .
Advanced Airbag System .......... 149
159 Anti-theft systems
Care .................... .. .. .. .
Child restraints ...... ... .. .. .... . 169 Anti-Theft Alarm System ........... 48
Children ....... .. .. .. ...... .... .
168 Anti-theft whee
l bolts . ......... ... .. 275
Components (front airbags) . .. .... . 152
Danger of fitting a child safety seat on the front passenger seat ............ 147
Disposal ........ .... ..... .. .... . 159
Front airbags .............. ... .. . 149
How do the front ai rbags work? .. ... 154
How many airbags does my vehicle have? .
152
Important things to know ... ... .. . 145
Indicator light ................... 156
Monitoring .............. .. ... .. 156
Repairs ......... .... ..... .. .. ... 159
Side airbags ..................... 161 Armrest
Center armrest . .................. 79
Rear armrest .. .. ... .. . .. .. .. .. .. . 80
ASR How the Anti-Slip Regulation System works . ........... ...... .... .. 190
Asterisk What does it mean when something is
marked with an asterisk? . . . . . . . . . . . 5
Audi magnetic ride . ........... .. . 12, 112
Description .. ...... ............. 112
Indicator light .... .. ............. . 12