2016 AUDI A4 brake sensor

Instruments and indicator lights
TPMS
14
USA models:
Anti-lock brak ing system (ABS) de­
fective,/
¢ page 19
Canada mod els :
Anti-lock brak ing system (A BS) de­
fective,/
¢ page 19
USA models :
Safety systems ./
¢page 19
Canada models :
Safety systems ./
¢page 19
Worn brake pads
¢page20
Elect romechan ical park ing brake
¢page 16
Tire pressure monitoring
system ,/
¢page 235
Tire pressure monitor ing system
¢page235
Electronic power control ./
¢page20
Malf unct io n ind icator Lamp (MIL)
,I
c::> page 20
Engi ne speed limitat ion
c::> page20
Engine oil level
c::> page 17
Engine oil sensor
c::>page20
Battery
c::>page 16
Tank system
c::>page20
Wa rm up engine *
¢page 199
Windshield washe r fl uid leve l
¢page 21
Windshield wipers
¢page 21
Remote control key
¢ page 83
Battery in remote control key
¢page 33
Defect ive light bulb wa rning
<=> page 21
Fog lights
¢page 21
Rear fog light(s)*
Head light range control*
<=> page 21
Adaptive light*
Light -/rai n sensor*
<=> page 21
Adaptive dampers*
¢page22
Sport different ial*
<=> page22
Ig nition loc k
¢page22
Steering co lumn lock
¢ page 18
Elec tromechanical stee ring, dy­
nam ic stee ring *,/
c>page 181
Transmission
- mu ltitronic, tiptronic
¢ page 96
-S tro n ic c::> page 96
Transmission
-S tron ic
¢ page 96
Other indicator light s _ ___::__ ________ _
Turn signals
<=>page 22
USA models : Cruise control
c> page88
Canad a mod els : Cruise control
¢ page88

Instruments and indicator lights
(0) Worn brake pads
EiJ Brake pads!
If the warn ing light illum inates, immed iate ly
contact your authorized A ud i dealer o r qualified
wo rkshop to have all brake pads inspected. O n
USA models the wa rni ng lig ht
EiJ comes on to ­
gethe r wi th the war ning l igh t
1111 . Both sets of
b rake pads on an ax le m ust always be rep lace d at
the same time .
A WARNING
Driv ing with bad bra kes can ca use a co llision
and ser ious personal in jury.
- If the wa rning light
EiJ and the warning
light
11111 ) w ith the message Brake pads !
comes on in the instrument cl uster display,
i mmediately contact your author ized Audi
dealer or qualified workshop to have all
bra ke pads checked o r rep laced if necessary.
EPC Electronic power control
This warning/indicator light monitors the elec­
tronic power control .
-
The~ warni ng/indicator light (Electronic Powe r
Control) ill uminates when you switch the ign ition
on as a function check.
(D} Tips
If this wa rning/in dicator light ill uminates
wh ile you are driving, then there is a mal func­
tion in the eng ine electron ics. Have the ma l­
function corrected as soon as possib le by yo ur
author ized A udi dealer or a qualified repair fa­
cility .
0 Malfunction Indicator Lamp (MIL)
The Malfunc tion Ind ica tor Lam p (M IL) is part of
the On-Boa rd Di ag nosti c (O BD II) system. The
symbo l
('4 lights up whe n the ignition is swi tch ­
e d on and wi ll turn off after the engine has sta rt·
e d and has sett led at a constant idle speed . This
i n dicates that the MIL is working p roperly.
l ) - : USA mode ls o nly
20
The wa rning lig ht ill uminates w hen the re is a
malfunction in the engine electronic system.
Contact yo ur aut ho rized Aud i dea le r and have the
malfunction corrected.
An impro per ly closed fue l filler cap may also
ca use the MIL light to illuminate ¢
page 200 .
For more info rm ation c::> page 29 .
!?) Engine speed limitation
App lies to vehicles : wi th engine speed limitatio n
lfl Do not exceed max. engine speed of XXXX
rpm
The lfl symbo l illu min ates when the re is an en­
gine co ntro l ma lf u nct ion. The~ indica tor ligh t
in the instrument clus ter also illum ina tes . T he
engine spee d is limited to the s peed displayed in
the d river info rmation system. Keep in mind t hat
the engine speed w ill not exceed the value dis ­
played in the driver information system, for ex­
amp le w hen downshifting.
D rive to your authorized A udi dealer immediate ly
to have the mal function cor rected .
~~. Engine oil sensor
• Oil level! Sensor defective
If the symbol illuminates, contact your author ­
i zed Audi dealer and have the oil sensor inspect­
ed. Until yo u have this done, chec k the oi l level
each time you refuel just to be on the safe side
¢ page 207.
Bu Tank system
Ii] Please refuel
If the indicato r light turns on for the first time
and t he message appea rs, the re are about
2.1- 2.4 gallons (7 • 9 lite rs) of fuel left in the
ta nk. Time to refuel¢
page 200 .
Ii] Fuel tank system malfunct ion! Contact deal -
er ..,.

Audi adaptive cruise control and braking guard
Audi adaptive cruise
control and braking
guard
Introduction
Applies to vehicles: with Audi adaptive cruise contro l
The adaptive cruise control system assists the
driver by regulating vehicle speed and helping to
maintain a set distance to the veh icle ahead ,
within the limits of the system. If the system de­
tects a moving vehicle up ahead, adaptive cruise
control can brake and then accelerate your vehi­
cle. This helps to make driving more comfortable
on long highway stretches.
The braking guard system can warn you about an
impending collision and initiate braking maneu­
vers
c::> page 104.
Adaptive cruise control and braking guard have
technical limitations that you must know, so
please read th is section carefully, understand
how the system works and use them properly at
all times.
General information
General information
Applies to veh icles: with Audi adaptive cruise control
Fig. 112 Front of t he veh icle: Posit ion of radar sensor
The area that contains the radar sensor
c::> fig . 112 must never be covered by st ickers or
other objects or obstructed with dirt, insects,
snow or ice that w ill interfere w ith the adaptive
cruise control system and braking guard. For in­
formation on cleaning, refer to
c::> page 193. The
same appl ies for any modifications made in the
front area .
98
The function of the adaptive cruise control sys ­
tem and braking guard is limited under some
condit ions:
- Objects can only be detected when they are
within sensor range
<:!) page 100, fig . 115.
-The system has a limited ability to detect ob­
jects that are a short distance ahead, off to the
side of your vehicle or moving into your lane.
- Some k inds of veh icles are hard to detect; for
example 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 all.
- When driving through curves
c:::> page 99.
- Stationary objects
i::!) page 99 .
& WARNING
-Always pay attention to traffic when adaptive
cruise control is switched on and braking
guard is active. As the driver, you are still re­
sponsible for starting and for maintaining
speed and distance to other objects . Braking
guard is used to assist you . The driver must
always take act ion to avoid a collision . The
driver is always responsible for braking at the
cor rect time.
- Improper use of adaptive cruise contro l can
cause collisions, other accidents and serious
personal injury.
- Never let the comfort and convenience that
adapt ive cr uise control and braking guard
offe r distract you from the need to be alert
to traffic conditions and the need to remain
in full control of your ve hicle at all times,
- Always remember that the adaptive cruise
control and braking guard have limits -they
will not slow the vehicle down or maintain
the set distance when you dr ive towards an
obstacle or something on or near the road
that is not moving, such as vehicles stopped
in a traff ic jam, a stalled or disabled veh icle.
If registered by the radar sensor, veh icles o r
obstacles that are not moving can trigger a
coll ision warning and if confirmed by the
video camera, an acute collision warning. ..,

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Audi ada pti ve c ruise contr ol and br akin g gu ard
-For safety reasons, do not use adapt ive
cruise contro l when driv ing on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather (such
as ice, fog, gravel, heavy rain and hydroplan­
ing) . Us ing the system under these condi­
t ions could result in a collision .
- Switch adaptive cruise contro l off tempora­
rily when driving in turn ing lanes, on ex­
pressway exits or in const ruc tion zones. This
preven ts the vehicle from accelerating to
the set speed when in these situat ions .
- T he adapt ive cr uise con trol system will no t
br ake by i tself if you pu t your foot on the ac­
celerator peda l. Doing so can override the
speed and distance regulation.
- Whe n approaching stat ionary obje cts such
as stopped traffic, adapt ive cruise control
will not respo nd and braking guard will have
limited function .
- The adaptive cruise control system and
brak ing guard do not react to peop le, ani­
ma ls, objects crossing the road or oncom ing
objects.
- The function of the radar sensor can be af­
fected by reflective objects such as guard
rai ls, t he entrance to a tunnel, heavy rain or
ice.
- Never follow a veh icle so closely that you
cannot stop your vehicle safely . The adap­
t ive cr uise control cannot slow or brake the
vehicle safely when you follow another veh i­
cle too close ly. Always remember th at the
au tom atic b raking function ca nnot br ing the
vehicle to a sudden or emergency stop un­
der these conditions .
- T o preven t unintended operation, always
switch AC C off when i t is not be ing used.
(D Note
The sensor can be disp laced by impacts o r
damage to the bumper, whee l housing and
underbody. That co uld affect the adaptive
cru ise con trol sys tem and braking guard.
Have your a uthorized Audi dea ler or author­
ized Aud i Service Facility check their function.
In curves
Applies to vehicles: with Audi adaptive cruise control
Fig. 113 Ex amp le : d ri ving int o a c urve
When driving into a curve¢ fig. 113 and out of a
curve, the adapt ive cruise control may react to a
vehicle in the next lane and apply the brakes . Yo u
can override or prevent the b raking by press ing
the accelerator pedal b riefly.
Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 1 14 Example: object c hang ing lanes a nd st ationary
ob ject
The adaptive cruise control system only reacts to
objects that are moving or that the system has
already detected as moving. For example, if ave­
hicle @, which has already been detected by the
adaptive cruise control, turns or changes lanes
and another stat ionary vehicle @ is located in
front of that vehicle, the system will not react to
t h e stationary veh icle.
Vehicles with manual transmission
Applies to vehicles: with Audi adaptive cruise control
The ad aptive cr uise con trol is avai lab le from the
2nd gear through the 6th gear in the customary
RPM. ....
99

Audi adaptive cruise control and braking guard
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise contro l
Fig. 122 In strument cluste r: appro ach warning
Braking guard uses a radar sensor. It also func­
tions within the limits of the system when adap­
tive cruise control is switched off .
What can Audi braking guard do?
When detected in time, the system can assess
si tuation s when a veh icle ahead brakes suddenly
or if your own vehicle is traveling at a high speed
and approaching a vehicle up ahead that is mov ­
ing more slowly . Braking guard does not react if
it cannot detect the situat ion.
The system advises you of variou s situations:
- 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 collision. The indicator light .
in the display comes on.
- The
approach warning is given when a detected
vehicle up ahead in your lane is moving much
more slowly than you are or if it brakes sharply .
When this warning is given, it may only be pos­
s ib le to avo id a collision by swerving or braking
sharply. The indicator light . and indicator in
the d isplay will warn you about the danger
¢fig. 122. You will also hear an acoustic signal.
If you do not react fast enough or do not react at
a ll to the situation, Braking guard will intervene
by braking and the message
braking guard inter­
vention
will appear.
l) This is no t a vail able in som e coun trie s.
104
- If a collision is imminent , the system will first
provid e an
acute warning by briefly and sharply
app lying the b rakes.
- If you do not react to the acute warning, brak­
ing guard can brake within the limits of the sys ­
tem . This reduces the vehicle speed in the event
of a collision.
- At speeds under 20 mph (30 km/h), the system
can initiate a complete deceleration shortly be­
fore a collision ll.
- If the braking gua rd senses that you are not
braking hard enough when a collision is immi­
nent, it can increase the braking force.
Which functions can be controlled?
You can switch braking guard and the distance/
approach warning on or off in the radio or MMI
¢page 105, Settings in the radio/MM!.
A WARNING
Lack of attent ion can cause collisions, other
accidents and ser ious personal injuries . The
braking guard is an assist system and cannot
prevent a collision by itself . The driver must
always inte rvene. The driver is always respon­
sible for braking at the correct time .
- Always pay close attention to traffic, even
when the braking guard is switched on. Be
ready to intervene and be ready to take
complete control whenever necessary. Al­
ways keep the safe and legal distance be­
tween your vehicle and vehicles up ahead .
- Braking guard works within limits and will
not respond outside the system limits, for
example when approach ing a stopped vehi­
cle or stationary obstacle (end of a traffic
jam or vehicle that has broken down in traf­
fic) .
- Always remember that the radar sensor for
the 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
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promptly detected or may not be detected
at all.
- Reflective surfaces including crash barriers
or tunnel entrances may impair the function
of the radar sensor.
(D Tips
- You can cancel the braking that is initiated
by the system by braking yourse lf, by accel ­
erating noticeably or by swerving.
- Braking guard error messages ~page
105 .
-Keep in mind that braking guard can brake
unexpected ly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
Settings in the radio/MM!
A ppl ies to vehicles: with Audi adaptive cruise co ntro l
... Se lect : I CARI funct ion button > C ar s ystem s*
control button > Driver a ssi st > Audi brak ing
guard .
Or
... Select:
~I C-A-R~I funct ion button > A udi braking
g uard .
S ystem -
Switch Audi braking guard On and Off.
When you sw itch the ignition on, the message
Audi bra king gua rd off appears if the system is
switched off.
Ea rly warn ing -The distance and approach warn ­
ings in the display can be switched
On /Off .
(D Tips
-Your settings are automatically stored and
ass igned to the remote control key being
used at the times the sett ings are made.
- If you restrict or sw itch off the ESC, the
braking guard also sw itches itself off
~ page
178 .
- Switch braking guard off when you are load­
ing the veh icle onto a vehicle ca rr ier, train,
sh ip or other type of transportation . This
can p revent undesired warnings from the
braking gua rd system .
Messages
Applies to vehicles: wi th Aud i adapt ive c ruise control
Braking guard : Off
This dr iver message appears if the system is
tu rned off via the radio/MM I*. O therwise, if the
system is turne d off, the information appears ev­
ery time shortly after t he start o f the trip .
T he driver message a lso appea rs if the system is
not avai lab le due to a ma lfunction o r if the ES C i s
not switched on¢ page
178 . If th is is the case,
the system wi ll not provide warnings about a
possib le collision .
Braking guard : A ctivated
This dr iver message appears if sharp brake pres­
su re was applied due to an acute warning .
•••
Three white dots appear if a setting cannot be se­
l ected with the operating lever. For example, this
happens if you want to raise/lower the speed
even though there was no previously saved
speed .
ACC: Deacti vation
The driver message appears in vehicles wi th ma n­
u al transmission. If the clutch pedal was pressed
down for too long , the adaptive cr uise control
tu rns off. A chime sounds as a reminder.
ACC : Sen sor blocked
This message appears if the senso r view is ob­
structed, for examp le by leaves, snow, heavy
spray or dirt. Clean the sensor¢ page
98,
fig. 112 .
ACC : not availa ble
The driver message appears if there is a malfunc­
tion. The adaptive cruise control turns off . A
chime so unds as a reminder . Have the system
c h ecked by an author ized Audi dealer or au thor­
ized Audi Service Facili ty.
A CC: una vailable
The driver message appears if, for examp le, the
brake temperature is too high. The adapt ive .,.
105

Care and cleaning
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when was h­
ing the underbody or the inside of the wheel
housings.
- A fter washing the vehicle, the braking effect
may be delayed due to mo isture on the
brake rotors or ice i n the winter. The brakes
must be dried first w it h a few careful brake
applications.
{U) Note
- If you wash the ve hicle in an automatic car
wash, you must fold the exterior m irrors in
to reduce the risk of damage to the mirrors.
Power folding exte rior m irrors* must on ly
be fo lded in and out us ing the power folding
f u nct io n.
- T o p revent paint damage, do not wash the
vehicle in di rect sunlight. -
To red uce the risk of damage to the s urface,
do not use insect removing sponges, k itchen
sponges o r similar items .
- Matte finish painted vehicle components:
- To reduce the r isk of damage to the sur-
face, do not use polishing agents or hard
wax.
- Neve r use protective wax. It can destroy
the matte finish effect .
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint. The paint could be damaged
when the stickers or magnets are re­
moved.
@ For the sake of the environment
Only wash t he veh icle in facili ties spec ially de­
s igned for that pu rpose. This will reduce the
r isk of dirty wate r cont am ina ted with o il from
en te ring the sewe r system.
Cleaning and care information
W hen clean ing and ca ring for ind ividua l vehicle
com ponents, refer to the fo llow ing tables. The
i n fo rmat ion conta ined there is s imply recom­
mendations. For ques tions or for components that are
not listed, cons ult an autho riz ed Aud i
dealer or au thor ized A udi Servi ce Fac ility. Also
f o llow the informa tion fo und in ¢ .&, .
Exterior cleaning
Component Situation Solution
Wind shield wiper
Deposits ¢ page 55, Cleaning windshield wiper blades
blades
Headlights
/ Tail
Deposits Soft sponge with a m ild soap solutiona>
lights
Sensors /camera
Deposits Sensors: soft cloth with solvent-free cleaning solut ion
lenses Camera lenses: soft cloth w ith alcohol-free cleaning so lu-
tion
Snow/ice H
and br ush/solvent-free de-icing spray
Wheels Road salt Water
Brake dus t Acid
-free special clean ing solu tion
E x haust tail pipes Road salt Water, clean ing solution su itab le for stainless stee l, if nee -
essary
Decorative parts / Deposits Mild soap so
lution al, a cleaning so lution suitable for stain-
t rim less stee l, if necessary
194

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Fuse panel @ (black)
No . Consumer
1 Dynamic steering
2 Electronic Stabilization Cont rol (mod ule)
A/C system press ure sensor, elect rome -
chan ica l park ing brake , Homelink, auto-
3 mat
ic dimming interior rear v iew mirror,
air q uality/outside a ir sensor, Electronic
Stabili zation Cont rol (button)
5 Sound actuator
6 Headlight range control/
headlight (cor-
ne ring light)
7 Headlight (corner ing light)
Con trol modules (e lectrom echan ica l par k-
8 ing brake , s hock ab so rbe r, q uattro s port),
DCDC converter
9 Adapt ive cru ise control
1 0 Shift ga te/clu tch se nsor
1 1 Side assist
12 Headlight range control
, p arkin g sys tem
13 Airbag
14 Rear wiper (a
llroad)
1 5 Auxiliary fuse (instrument panel)
1 6 Auxiliary fuse terminal 15 (engine area
)
Fuse panel@ (brown)
No . Consumer
2 Brake light senso r
3 Fuel pump
4 Clutch sensor
5
Left seat heating w it h /w it h out seat venti-
l a tion
6 Electronic Stabili zation Cont rol (e lectr ic)
7 Ho rn
8
F ront left door (window regulator, central
locki ng, mirror, switch, lig hting)
9 Windshield wiper moto r
10 Electronic Stabilization Cont rol (va lves)
Fuses and bulbs
No . Consumer
Two-door mode ls: rear left w indow reg ula-
1 1 tor; Four-door mode
ls: rear left door (w in-
dow regu lator, central locking, switch,
li ght ing)
1 2 Rain and
light sensor
Fuse panel © (red)
No . Consumer
3 Lumbar support
4 Dynam ic steering
5 Inter
io r ligh ting ( Cabr io let)
6 W
indshie ld washer system, headlight
wash er system
7 Vehicle e lectrica l system control module 1
8 Ve hicl e e lec trica l sy stem con trol module 1
9
Left rear window regu lator motor (Cabr io-
l et)/s unroof
1 0 Vehicle e lec tric al system con trol module 1
1 1 R
ight rear window regulator (Cabriolet)/
su n shade motor
1 2 A
nti- theft alarm warning system
Right cockpit fuse assignment
Fig. 20 7 Rig h t cockp it : f use pane l wit h plast ic cl ip
247