2012 AUDI A3 sensor

10 Instruments and warning/indicator lights
Instruments and warning/indicator Lights
Instruments
Instrument cluster and controls
The instrument cluster is your central source of information.
Fig. 3 Ove rv iew of t he inst ru m ent cluster
CD Tac home ter w ith t ime and date
d is play .. .......... ....... .
@ Indicator lights ( tur n signa ls) .
®
©
®
®
0
®
Coolant temperature gauge .. .
Fu el gauge ............ .. .. .
Speedometer with odometer ..
Set/Check bu tton , ...... ... .
Warn ing/indic ator li gh ts
Reset button for
- T rip odom eter ...... ..... . .
- Se rv ice interval display
(D Note
1 0,11
1 3
11
12
12
11 , 13
1 3
12
30
The instrument cl uster and center console
illumi nat io n (gauges and need les) c omes
on when you switch on the ignition and the
vehicle headlights are off . Be aware o f the
f ollowing diffe re nc e betwee n mode ls built
t o US or C ana di an specific ati ons :
-USA models: illumination of the instru­
ment clu ster (gauges and needles),
dash and center console around the
gearshift lever is controlled by a light
sensor located in the instrument panel.
The instrument panel illumination will automatically become dimmer as the daylight fades away and eventually will
go out completely when outside light is
very low . This is to remind you, the driv­
er , to switch on the headlight s before it
gets too dark.
- Canada model s: instrum ent pan el illu­
mination will stay bright regardless of
the intensity of ambient light. Always be aware of changes in out side light
conditions while you are driving. Re­
spond in time to fading daylight by
turn ing the light switch to position
iD
(or ,;AUTO" if your car is equipped w it h
this feat ure)
to turn on your headlights .
Tachometer (engine rev counter)
The tachometer indicates the engine RPM
(revolutions per minutes).
The tachometer CD c> page 10, fig. 3 is the left
one of the two large clock-type d isplays.
T he eng ine turns at a speed
1 000 times the
s ingle digit in the display, e.g . if the needle
po ints at the "2", the engine t urns at
2000RPM. ~

14 Instrum ent s and w arn ing /indic ato r light s
Engine coolant level too low
ii
Engine oil sensor malfunction
engine coolant temperature too
¢page20
high ¢page 17
•
Battery voltage too h igh or too low
Electro-mechanical power assist
¢page20
¢page 17
II
Low fuel level
Clutch is overheating
¢page 21
¢page 101
•
Windshield washe r fl uid level low
Y ellow indicator lights ¢page 21
D
Yellow symbols indicate a priority 2 ma lf u nc-
~:~
Defective light bulb
tion -Warning!
¢page 21
Ji]
Electronic Stab ilizat ion Program
•
U SA mod els : Defective brake light
(ESP)
./¢page 18
¢page 21
I
Electronic Stabilization Program
•
Canada model s: Defective brake
(ESP)./
<=:>page 18 light ¢ page 21
~ USA mod els : anti-lock brake system
II
Dynamic headlight range cont ro l*
(ABS) ./ defective
<=:> page 18 defective ¢ page 21
Canada models: anti-lock brake sys--
[I]
•
Adaptive Light * defective
tern ./ (ABS) defective
¢page 18
¢page 21
•
Worn brake pads
m
Light/rain sensor defective (automat-
¢ page 19 ic headlights) * defective ¢ page 22
g
Tire pressure too low
B
Audi magnetic ride
¢page 19
¢page22
ll@I@ Tire pressure monitoring system
~
USA models: Speed warning 1
¢page 231
¢page 31
[m
Electronic power control./
¢page 19
•
Canada models : Speed warning 1
¢page 31
•
USA models: Malfunction Indicator
Lamp (MIL)
¢page 19
•
USA models: Speed warn ing 2
¢page31
Canada models: Malfunction Indica-
tor Lamp (MIL)
¢page 19
•
Canada models: Speed warning 2
¢page 31
II
Glow plug system ./ (diesel engine
Electro-mechanical power assist
only) (alternative to~ )
M ¢page 17
¢page20
.,
Engine speed limitation *
Diesel particulate filter
¢page20
¢page22
Ill
Check engine oil level
¢page20

20 Instruments and warning /indicator lights
The symbol lll lights up when the ignition is
turned on and will turn off after the engine
has started and has sett led at constant idle
speed. This indicates that the MIL is working
properly.
The warning light illuminates when there is a
malfunction in the engine e lectronic system .
Contact your authori zed Audi dealer and have
the malfunction corrected .
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
¢page 192.
F or more information ¢ page 24.
W Glow plug system I Engine
malfunction
Applies to vehicles: with diesel eng ine
The indicator lamp lights up to show that the
glow plugs ore preheating. It flashes if there is an engine malfunction.
Warning light II stays lit up
If the II indicator light illuminates, the g low
p lug system is active. You shou ld start the en ­
gine immediately after the indicator light
switches off. The indicator light on ly illumi­
nates for approximately 1 second if the en­
gine is warm or if the outside temperature is
above 46 QF (8 QC) .
There is a fau lt in the glow plug system if the
warning light
II does not light up when the
engine is
cold . Contact an author ized Audi
dealer or a qualified workshop .
II Warning light flashes
If a malfunction develops in the engine man­
agement system while you are driving, the
glow plug light will flash
II . The eng ine
should be checked by an authorized Audi deal­
er or a qualif ied workshop as soon as possible .
A WARNING
If you do not pay attention to the warning
lights that have come on, this could lead
to personal injury or damage to your vehi­
cle.
! 7} Engine speed limitation
Applies to vehicles: with engine speed limitat ion
Ill Do not exceed max. engine speed of XXXX
rpm
The Ill symbol illuminates when there is an
engine control malfunct ion. The ind icator
light~ in the instrument cluster also illumi­
nates. The engine speed is limited to the
speed displayed in the driver information sys­
tem. Keep in mind that the engine speed wi ll
not exceed the val ue displayed in the driver in­
formation system, for example when down­
shifting.
Please go to an authorized Audi dealer or oth­
er qualified workshop to have the malfunction
repaired.
~ .. Checking the engine oil level
When the II symbol illum inates, check the
engine oil level as soon as possible
¢ page 200 . Top off the oil at your earliest
opportunity ¢page 200.
II Please add max. 1 qt of engine oil!
If the II symbol comes on, add 1 quart (1 li­
ter) of oil at the next opportunity
¢ page 200.
• ~m Engine oil sensor defective
If the Ill symbol illuminates, contact your
authorized Aud i dealer and have the oil sensor
inspected .
0 Battery voltage low
(•i Low battery charge: battery will be
charged while driving
If the indicator light turns on and the mes­
sage appears, there may be limited starting
ability.
If this message turns off after a little while,
the battery charged enough while driving .

22 Instruments and warning /indicator lights
When this symbo l ml illuminates, it means
that Adaptive Light is defective. Go to a quali­
fied workshop to have the headlights or the
control unit for the Adaptive L ight repaired.
@, o Light/rain sensor defective
App lies to vehicles: with automat ic headlights
The indicator light indicates a defect in the
automatic headlights/automatic wiper sys ­
tem .
If the symbo l illuminates, the light sensor has
failed. For safety reasons , the low beams are
turned on permanently with the switch in
AU­
TO . However, you can continue to turn the
lights on and off using the light switch . In the
case of a defect in the rain sensor , the w ind­
sh ield wiper lever functions are st ill available .
H ave the light/ra in sensor checked as soon as
possible at an authorized Audi dealer.
; Audi magnetic ride
Appl ies to vehicles: with Audi magnetic ride
The indicator light monitors vehicle damping.
The indicator light E illuminates when the ig­
nition is switched on as a function check.
@ Tips
If the indicator lamp illuminates while you
are driving, there is a malfunct ion in the
veh icle damping. The chass is should be in­
spected immediately by an authorized Au­
di dealer.
~ Diesel particulate filter clogged
Applies to vehicles: with diesel engine and diesel particu­
late fi lter
1/1 Particulate filter ! See owner's manual
If the indicator light II in the instrument
cluster comes on, the diesel particulate filter has become blocked with soot as the result of
constant short-distance driving. When the
II symbol illuminates, you can alter your
driving style to assist the filter self-clean ing
p rocess. Drive for approximately 15 minutes
in 4th or 5th gear (automatic transmission with the se
lector lever in the S position) at a
minimum speed of 37 mph (60 km/h) and an
engine speed of approx imately 2,000 RPM .
The temperature increase that will result from
this can burn off the soot in the filter. The
symbol will switch off when the cleaning is
successful. After a successful cleaning, there
is no need to bring the car to an authorized
dealer or qualified workshop because this is
part of normal vehicle operation .
If the symbol
DI does not switch off, see
your autho rized dea ler or other qualified
workshop to have the problem corrected .
As long as the indicator light
11!1 remains on
(diesel part iculate filte r plugged), you ca n ex­
pect increased fuel consumption and possibly
also a loss of engine performance.
For more information on the diesel particu­
late filter, refer to~
page 171 .
A WARNING ,__
Always adapt your speed to the current
weather, road and traffic conditions. You
should never disobey traffic laws in order
to follow driving recommendations .
¢ ¢Turn signals
-
The indicator light blinks when you use either
turn signal.
Whenever you use the left B or the right fl
turn s ignal, the indicato r light blinks . When
you use the emergency f lasher, both indicator
lights flash.
If one of the turn signal light bulbs burn out,
the turn signal will blink twice as fast as nor­
mal.
Additional information on the turn s ignals
Q page SO.
CRUISE/ vf Cruise control
T he
(ijjll j~i~ (USA models)/. (Canada models)
warning/indicator light illuminates when the
cruise control is activated .

Clear vision Lights
· r/.· Switching the headlights on and off
F ig. 4 3 In str ume nt pa ne l: light switch
F ig. 44 Instrumen t pane l: Light sw itch with dayt ime
running lights (DRL)
The ligh t sw itch must not be ove rtu rn ed past
the s tops in
either d ire ct io n.
Switching on automatic headlight
control*
.,. Turn the light swi tch to AUTO* ¢ fig. 43.
Switching on the side ma rker lights
.,. Turn the light switch to ooo=.
Switching on the headlights and high
beam
.,. Turn the light switch to tD .
.,. Pus h the high beam lever forward towards
the instrument pane l
Q page 50.
Switching off the lights
.,. Turn the light swi tc h to 0 .
The headlig hts on ly wo rk whe n the igni tion is
sw itche d on . W hile s tartin g the e ng ine or
when swit ching
off the ign ition , th e head-
Clear vision 4 7
lig hts w ill go off and only the side ma rke r
li ghts wi ll be on.
Daytime running lights (DRL) (USA
models)
The d aytime r unning lights can be tur ned on
o r
off using t his fu nction . If the function is ac ­
tive, the dayt ime ru nning lights a re turned on
a utomat ica lly when the ign ition is switched
o n.
T he daytime r unning lights are activate d
only
when the light switc h is at the AUTO* or DRL *
pos ition.
Daytime running lights (Canada models
only)
The daytime r unning lights are activated only
whe n the light switc h ¢ fig. 43 is either at the
0 or the coo: pos ition.
T he daytime r unning lights funct io n can not be
turned
off .
Automatic headlight control*
In the swi tch positi on AUTO the automatic
headlight control
i s tur ned on. The l ow
beams are turne d on au tomatically through a
li ght se nsor as soo n as amb ient brightness
(e .g. when dr iv ing into a t unnel) fa lls below a
val ue p reset at t he factory. Whe n ambient
bri ghtness i ncreases aga in, the low beams are
turned
off aga in a utomat ica lly c:> & .
In the AUTO position the low beams are
switc hed
off automatically when the ignition
is tur ned
off.
Light Sensor Malfunction*
In the event of a light se nsor malfunction, the
drive r is notifie d in the instrument cluste r dis ­
play:
ral Automatic headlights/automatic wipers
defective
Fo r sa fety reaso ns the low beam s are turned
on perm anen tly wi th the switch in
AUTO* .
However, you can co nti nu e to turn the lights
o n and
off u sing the lig ht switch. Have t he ..,.

48 Clear vis ion
light sensor checked as soon as possible at a
dea lership.
Com ing home /leaving home function *
The function is switched on when the switch is
i n the AU TO* position and the function is
shown as active in the driver info rmation sys­
tem .
The
co ming h om e function illuminates the
a rea around the veh icle when the ign it ion is
switched off and the driver 's door is opened.
The length of time the lights remain on can be set in the menu display
( Illumination > Exte­
r io r light s> coming hom e).
The leav ing home function illuminates the
area around the vehicle when unlock ing it.
A WARNING
- Never use dayt ime running lights to see
where you are going. They are not bright
enough and w ill not let you see far
enough ahead for safety, especially at
dusk or when it is dark. Always switch on
the low beams at dusk or when it is dark.
- Automatic headlights are only intended
to assist the dr iver . They do not relieve
the driver of his responsibility to check
the headlights and to tu rn them on man­
ually according to the current light and
visibili ty cond itions. Fo r example, fog
and rain cannot be detected by the light
sensors . So a lways switch on the head­
lights under these weather cond itions
and when driving in the dark
io.
- Crashes can happen when yo u cannot see
the road ahead and when you cannot be seen by other motorists .
- Always turn on the headlights so that
you can see ahead and so tha t others
can see yo ur car from the bac k.
- With the switch in
AUTO front fog lights
ca nnot be t urned on in addition .
- The light sensor fo r headlight contro l is
l ocated in the rear view m irror mount .
Do no t apply any stickers to the w ind- shield in this area to prevent malfunc
­
tions or fa ilures.
- Some exter io r light ing funct ions can be
adjusted in the driver informat ion sys­
tem
~ page 2 7.
- If you remove the ignition from the igni ­
tion lock while the headlights are still
on, a buzzer will so und as long as the
dr iver's door is open to rem ind you to
turn off the lights.
- Always observe the specif ic loca l regula­
tions for your area as to when to use your
lights.
- With automatic headlights, the high­
beam funct ion is also available, but wit h
one restrict ion: If you have not switched
the high beams back to low beams dur­
ing automatic headlight operation (fo r
example, after d riving through a tunnel) ,
only the low beams come on the nex t
t ime au tomati c headlights are swi tc h ed
on. To use the high beams, you first have
to pull the high beam lever back and
then push the lever fo rward again.
- In cool or damp weather , the inside of
the headlights, turn signals and tail lights can fog over due to the tempera­
ture difference between the inside and
outside. They w ill clear shortly after
switching them on. This does not affect
the se rv ice life of the lighting .
- Frequent use of the coming home/leav ­
ing home function for app roach ing and
depa rting a vehicle parked in the da rk
w ill strain the battery . Thi s ap plies pa r­
tic ular ly if only short distances a re d riven
between stops . Occasionally drive longer
dis tances to make sure the battery is re ­
charged sufficiently.

:l:D Front fog lights
Use the light switch to turn on the front fog
lights.
Fig. 45 Fog light act ivat ion: light sw itc h pos it ion o n ve ­
h icles WITHO UT sensor light
}D Switching on the front fog lights
.. Do not turn the light switch -"t;.. -<=> fig. 45 to-
ward the fog light symbol
.. Turn the light switch to
coo: or to @:D.
.. Pull the light switch to the first stop (D.
When the front fog lights are on, the sym­
bol
:iO next to the light switch will illuminate.
C:t:t Instrument panel illumination
The illumination of the instruments, displays
and the center console can be adjusted .
Fig. 46 In st rum ent pa nel illum inat ion
0
"' d. .. m
You regulate the brightness of the instru­
ments with the left thumbwhee l
Co/<=> fig. 46 .
@ Ignition ON, light switch.
With the ignition switched ON, the glow of in­
strument needles
can be adjusted to appear
brighter or d immer.
Clear vision 49
:oo: or io Ignition ON, light switch.
With the lights swit ched on, the brightness of
instrument cluste r (i.e. needles, gauges and
displays) and center console illumination can
be adjusted.
(D Note
The instrument cluster and center console
ill umination (gauges and need les) comes
on when you switch on the ignition and the
vehicle headlights are off . Be aware of the
follow ing difference between models built
to US or Canadian specifications:
-USA models: illumination of the instru­
ment cluster (gauges and needles),
dash and center console around the
gearshift lever is controlled by a light
sensor located in the instrument panel.
The instrument panel illumination will
automatically become dimmer as the
daylight fades away and eventually will
go out completely when outside light is
very low. This is to remind you, the driv­
er, to switch on the headlights before it
gets too dark.
- Canada models: instrument panel illu·
mination will stay bright regardless of
the intensity of ambient light. Always be aware of changes in outside light
conditions while you are driving. Re­
spond in time to fading daylight by
turning the light switch to position
gD
(or "AUTO " if your car is equipp ed with
th is feature)
to turn on your headlights.

-Automat ic dimming for the m irror only
operates p roperly if the lig ht striking the
i ns ide mirror is not hindered in any way.
Wiper and washer
system
{sf) Windshield wiper
The windshield wiper lever controls both the
windshield wipers and the washer system.
F ig . 57 Wiper lever: w inds hie ld w iper lever positions
The windshield wiper lever c> fig. 57 has the
following positions:
Ql Intermittent wiping (activating rain
senso r)*
.. Move the lever up to position@.
.. Move the interval set sw itch @, to change
t h e interva ls.
Low wiper speed
.. Move the lever up to position@.
High wiper speed
.,. Move the lever up to position @.
One-touch wiping
.. Move the lever to position @, when you
want to w ipe the w indshield
briefly .
Automatic wiper /w asher
.. Pu ll the lever to posit ion ® (toward the
steering wheel) and ho ld.
.. Re lease the lever . The washer stops and the
wipers keep going for about four seconds.
Turning off th e wiper s
.. Move the lever back to position @ .
Clear vi sion 55
The w indshield wipers and washe r only work
whe n the ignition is turned on . If you switch
off the ignition with the w indshie ld w iper lev ­
er st ill in the interva l wipe position and then
come back a whi le later and drive off, the rai n
senso r will reactivate itsel f after the vehicle
speed has exceeded 4 mph (6 km/h) .
The rain sensor* is only activated with the
wiper lever set to position @. When it starts
to rain, the rain sensor will automat ically acti ­
vate the intermittent w iping mode.
To reduce the sensitivity of the sensor, move
switch ® down. To increase the sensitivity,
move t he switch up. The h igher you adjust the
sens it ivity, the faster the senso r will react
when it senses mo isture on the windsh ield .
The rain sensor w iper intervals depend on the
sensit ivity sett ing as well as vehicle speed.
D uring brief s tops, wipe r mot io n will adjust in
r elat ion to the amou nt of rain on the w ind­
shield .
Automat ic w iper/was her : To eliminate water
drople ts, t he windsh ield wiper pe rforms o ne
afterw ipe ope ra tion after severa l seconds
whi le dr iv ing . You ca n sw itch this f unct ion off
by moving the leve r to posit io n ® within
10 seconds of the afterw ipe operat io n. The af­
terwipe function is reactivated the next time
the ignitio n is switch.
When the igni tio n i s tur ned on, the washe r
jets are heated*.
& WARNING ~
- Wiper blades are crucial for safe drivi ng!
On ly when they are in good condit io n are
they able to clear the windows properly
to prov ide uncompromised visib ility.
Worn o r damaged wiper blades are a
safety haza rd
c> page 57, Replacing
front wip er blades!
- The light/rain senso r* is only des igned to
assis t and suppo rt the driver.
It rema ins
e ntire ly th e drive r's respo nsib il ity to
m onitor outside weathe r cond itions and
t o manu ally a ctiv ate the wipe rs as soo n