2020 AUDI A3 brake sensor

8V2012721BK
Quick access




























Transmission
=> page 77
Drive system
=> page 82
Drive system
=> page 82
Drive system
=> page 82, > page 302
Drive system
=> page 82, > page 302
Drive system
=> page 82
Vehicle sound
=> page 82
Electromechanical parking brake
=> page 88
Hill hold assist
=> page 88
Engine start system
=> page 73
Keys
=> page 73
Electronic Stabilization Control
(ESC) ¥
=> page 93,>page 95
Electronic Stabilization Control
(ESC) ¥
=> page 93
Electronic Stabilization Control
(ESC)
=> page 94, > page 93
Anti-lock braking system (ABS) ¥
=>page 95
Anti-lock braking system (ABS) Y
=> page 95
Steering
=> page 92
Steering lock
=> page 92
Suspension control
=> page 92

Engine speed limitation
=>page 16
Tank system
=> page 300
Electrical system
=> page 314
Engine oil level (MIN)
=> page 308
Engine oil sensor
=> page 308
Malfunction Indicator Lamp (MIL)
v
=> page 303
Washer fluid level
=> page 317
Windshield wipers
=> page 52
Charging system
=> page 111
Tire pressure
=> page 337, or > page 339
Tire pressure
=> page 337, or > page 339
Bulb failure indicator
=> page 45
Headlight range control system
=>page 45
Adaptive light
=>page 45
Light/rain sensor
=> page 45, > page 52
Driver's door
=> page 29
Battery in remote control key
=> page 27
Power top
=> page 38
Side assist
=>page 135
11

8V2012721BK
Assist systems

Which functions can be controlled?
When you switch adaptive cruise control on, you
can set the current speed as the “control speed”
= page 120, Switching on and off.
When driving, you can stop cruise control
= page 122 or change the speed > page 121 at
any time.
You can also set the distance to the vehicle ahead
and set the adaptive cruise control driving pro-
gram > page 123.
er l eieleurlsela)
Applies to: vehicles with Audi adaptive cruise control/Audi pre
sense front



Fig. 109 Front of vehicle: sensor
The radar sensor area > fig. 109 must not be cov-
ered with stickers, deposits or any other obstruc-
tions as it may impair the function of the adap-
tive cruise control or the pre sense front. For in-
formation on cleaning, see > page 342. The
same applies for any modifications made in the
front area.
The function of the adaptive cruise control sys-
tem or pre sense front is limited in some condi-
tions:
— Vehicles can only be detected when they are
within the sensor range > page 118, fig. 108.
—The system has a limited ability to detect
vehicles that are a short distance ahead, off to
the side of your vehicle or moving into your
lane.
— Objects that are difficult to detect such as mo-
torcycles, vehicles with high ground clearance
or an overhanging load are detected late or not
detected at all.
— When driving through curves > page 120.
— When the vehicle is stationary > page 120.


Z\ WARNING
Always pay attention to the traffic around you
when adaptive cruise control is switched on.
As the driver, you are still responsible for your
own speed and the distance to other vehicles.
The adaptive cruise control is used to assist
you. The driver must always take action to
avoid a collision. The driver is always responsi-
ble for braking at the correct time.
— For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condition and/or in bad weather (such
as ice, fog, gravel, heavy rain and hydroplan-
ing). Using the system under these condi-
tions could result in a collision.
— Switch adaptive cruise control off temporari-
ly when driving in turning lanes, on express-
way exits or in construction zones. This pre-
vents the vehicle from accelerating to the
stored speed when in these situations.
— The adaptive cruise control system will not
brake by itself if you put your foot on the ac-
celerator pedal. Doing so can override the
speed and distance regulation.
— Adaptive cruise control does not respond to
people, animals, or crossing or oncoming
objects.
— The function of the radar sensors can be af-
fected by reflective objects such as guard
rails, the entrance to a tunnel, heavy rain or
ice

@) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. This can impair the adaptive
cruise control. Have an authorized Audi dealer
or authorized Audi Service Facility check their
function.
@) Tips
For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see > page 377.
119

8V2012721BK
Assist systems

This message appears if the sensor view is ob-
structed, for example by leaves, snow, heavy
spray or dirt. Clean the sensor > page 119,
fig. 109.
ACC: currently unavailable. Incline too steep
The road exceeds the maximum possible angle
for safe adaptive cruise control operation. The
adaptive cruise control cannot be switched on.
ACC: only available in D, Sor M
The adaptive cruise control system only works in
the specified selector lever position. Select the
respective selector lever position.
ACC: parking brake applied
The adaptive cruise control system switches off
automatically if the parking brake is set. The
adaptive cruise control is available again after re-
leasing the parking brake.
ACC: currently unavailable. Stabilization
control input
This message appears if the Electronic Stabiliza-
tion Control (ESC) is taking action to stabilize the
vehicle. In this case, adaptive cruise control
switches off automatically.
ACC: Please take over!
This message appears if the vehicle rolls back
when starting on a slight incline, even though
ACC is active. Press the brake pedal to prevent
the vehicle from rolling or starting to move.
ACC: currently unavailable. Park assist active
The systems switch off when Park assist* is ac-
tive. The systems are available again after com-
pleting the parking process.
Distance warning: malfunction! Please contact
Service
The system cannot guarantee that it will detect
vehicles correctly and it has switched off. The ra-
dar sensor was moved or is faulty. Drive to an au-
thorized Audi dealer or authorized Audi Service
Facility immediately to have the malfunction cor-
rected.
Distance warning: currently unavailable. Sensor
view limited due to surroundings.
This message appears if the sensor view is ob-
structed, for example by leaves, snow, heavy
spray or dirt. Clean the sensor > page 119,
fig. 109.
Distance warning: currently unavailable. See
owner's manual
This message appears if the system has a tempo-
rary failure. If this occurs multiple times, drive to
an authorized Audi dealer or authorized Audi
Service Facility immediately to have the malfunc-
tion corrected.
Fasten seat belt
The system is not completely available if the driv-
er's seat belt is unfastened.
Stat. obj. ahead
This message appears if you would like to switch
the system on and there is a stationary object di-
rectly in front of your vehicle.
Door open
The system is not available when the vehicle is
stationary and the driver's door is open.
Audi pre sense
Introduction
Applies to: vehicles with Audi pre sense
Within the limits of the system, the pre sense
functions can initiate measures in particularly
dangerous situations to protect the vehicle pas-
sengers and other road users.
— Due to the interlinking of various vehicle sys-
tems, critical driving situations can be detected
by pre sense basic and measures for preventa-
tive occupant protection are can be initiated.
— The pre sense front uses the data from the ra-
dar sensors and calculates the probability of an
accident > page 119. An impending collision
with vehicles can be detected within the limits
of the system. In this case, the system warns
the driver visually, acoustically and with a jerk
on the brakes if necessary. If needed, it can ini-
tiate a partial or full deceleration to reduce the
collision speed or to avoid the collision under
certain circumstances. In conjunction with pre >
125

8V2012721BK
Assist systems

strongly. The message Audi pre sense A
=> fig. 120 and a warning tone will warn you
about the danger.
If there is an impending collision with vehicles,
there will also be an acute warning in the form of
sharp braking. If you do not react to the acute
warning, pre sense front can brake with increas-
ing force within the limits of the system. This re-
duces the vehicle speed in the event of a colli-
sion.
Automatic deceleration
Depending on the speed, pre sense front can de-
celerate automatically shortly before a collision:
— if there are stationary vehicles when you are
traveling at speeds up to approximately 28
mph (45 km/h)
— if there are vehicles driving or stopped ahead
when you are traveling at speeds up to approxi-
mately 155 mph (250 km/h)
Automatic braking force increase
If pre sense front determines that you are not
braking strongly enough when a collision is immi-
nent, it can increase the braking force, depending
on the situation and speed:
— if there are stationary vehicles when you are
traveling at speeds up to approximately 50
mph (85 km/h)
— if there are vehicles driving or stopped ahead
when you are traveling at speeds up to approxi-
mately 155 mph (250 km/h)

— The system can deploy incorrectly due to
system-specific limits.
— Please note that the sensor does not always
detect all objects. This increases the risk of a
collision.
— Pre sense front does not react to vehicles
traveling toward you in the same lane, to
people, groups of people, animals, objects
that are crossing the road, or objects that
are difficult to detect > A\ in General infor-
mation on page 119.



ZA\ WARNING
Pre sense front may be restricted or not avail-
able in the following example situations:
— If there are other reflective objects nearby,
such as guard rails or vehicles
— When driving into a tunnel
— In heavy fog, rain, spray, or snow
—If the radar sensor is dirty, covered in ice,
damaged, or covered
— In curves
— If the ESC was switched off.


Z\ WARNING
Pre sense front cannot overcome the laws of
physics. It is a system designed to assist and
it cannot prevent a collision in every circum-
stance. The driver must always intervene. The
driver is always responsible for braking at the
correct time. Do not let the increased safety
provided tempt you into taking risks. This
could increase your risk of a collision.
— Loose objects can be thrown around the ve-
hicle interior during sudden driving or brak-
ing maneuvers, which increases the risk of
an accident. Store objects securely while
driving.

@) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. Pre sense front can be impaired by
this. Have an authorized Audi dealer or au-
thorized Audi Service Facility check their func-
tion.
(i) Tips
— You can cancel the braking with increasing
force that is initiated by the system by brak-
ing yourself, by accelerating noticeably or by
swerving.
— When driving in reverse, certain pre sense
front functions are switched off.
— System functions may not be available if the
ESC is limited or switched off, or if there is a
malfunction.
127

Assist systems

G) Tips
— Side assist is not active while you are mak-
ing the adjustment.
— Your settings are automatically stored and
assigned to the remote control key being
used.
RET oa ar lie 4
Applies to: vehicles with rear cross-traffic assist
1. S 2
= + oO

Fig. 128 Example display

Fig. 129 Infotainment system: rear cross-traffic assist dis-
play
Activating rear cross-traffic assist
The rear cross-traffic assist is activated automati-
cally if you turn on the parking aid > page 136 or
shift into reverse gear.
The rear cross-traffic assist can warn the driver of
a potential collision with approaching cross-traf-
fic when driving in reverse at speeds up to ap-
proximately 7 mph (12 km/h). Within its limits,
the system monitors the areas behind and next
to the vehicle using the radar sensors when leav-
ing a parking space > page 132, fig. 127. Moving
objects that are approaching, such as cars, are
detected > fig. 128.
If the system detects critical cross traffic when
backing out of a parking space, it will react as fol-
lows:
134
— Visual indicator: an indicator appears in the In-
fotainment system display with a red arrow
symbol. The arrow points in the direction from
which the object is approaching > fig. 129.
— Audible warning signal: a continuous tone may
sound as an additional indicator when driving in
reverse.
— Automatic brake activation: a brief activation
of the brakes may also warn you of a potential
collision with an approaching object.
The audible warning signal and the automatic
brake activation occur only when driving in re-
verse.

iN WARNING
—The rear cross-traffic assist is an assist sys-
tem and cannot prevent a collision by itself.
The driver must always intervene. The driver
is always responsible for braking at the cor-
rect
time.
— Please note that the rear cross-traffic assist
may activate the brakes unexpectedly. Se-
cure any cargo that you are transporting to
reduce the risk of damage or injury.
— An additional brake activation may be trig-
gered within 10 seconds after an automatic
brake activation.
—If there is an acoustic warning signal from
the rear cross-traffic assist, then the parking
system may not warn you of detected obsta-
cles under certain circumstances.
— The view of the radar sensors may be im-
paired by leaves, snow, heavy spray or dirt.
Clean the area in front of the sensors
=> page 132, fig. 127.

ZA WARNING
— The rear cross-traffic assist will not provide
alerts about people and cannot warn you
about every type of approaching objects,
such as cyclists. Always monitor the traffic
as well as the vehicle's surroundings with di-
rect eye contact.
— The rear cross-traffic assist will not provide
alerts if your vehicle is parallel or diagonally

8V2012721BK
Assist systems


parked or if your vehicle is pulled too far in-
to the parking space so that it is hidden by
adjacent vehicles.

@) Note
Also read the information in >@ in General
information on page 133.
@ Tips
— You can cancel the automatic brake activa-
tion with increasing braking force if you ap-
ply the brakes yourself or accelerate consid-
erably.
—In some situations, rear cross-traffic assist
may warn you even if there is no cross traffic
in a critical area, for example when backing
into a parking space or maneuvering.
— The rear cross-traffic assist also switches off
when you switch off the ESC.
— For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
=> page 377.
Applies to: vehicles with Audi side assist
& Audi side assist: malfunction! Please contact
Service
The system cannot guarantee that it will detect
vehicles correctly and it has switched off. The
sensors have been moved or are faulty. Have the
system checked by an authorized Audi dealer or
authorized Audi Service Facility soon.
Audi side assist: currently unavailable. No
sensor view
Audi side assist: currently unavailable. Sen-
sor vision restricted due to surroundings. See
owner's manual
The radar sensor vision is impaired. Do not cover
the area in front of the sensors with bike wheels,
stickers, dirt or other objects. Clean the area cov-
ering the sensors, if necessary > page 132,
fig. 127.
Audi side assist: currently unavailable
Side assist cannot be switched on at this time be-
cause there is a malfunction (for example, the
battery charge level may be too low).
Rear parking aid: obstacle detection restrict-
ed
The rear cross-traffic assist is not available. Ei-
ther the ESC is switched off, or the radar sensors
may be covered by a bike rack, stickers, leaves,
snow or other objects. Switch the ESC on, or
clean the area in front of the sensors if necessary
= page 132, fig. 127. If this message continues
to be displayed, drive immediately to an author-
ized Audi dealer or authorized Audi Service Facili-
ty to have the malfunction repaired.
135

Parking aid

Switching on and off
Applies to: vehicles with parking system plus/park assist
2 + 3
S| 2 ©
a.


Fig. 132 Center console: parking aid button
Switching on and off
Requirement: the vehicle speed must be under
approximately 6 mph (10 km/h).
> Press the Pvt button in the center console. A
short confirmation tone sounds and the LED in
the button turns on.
Switching on automatically
The system switches on automatically when re-
verse gear is engaged while the engine is run-
ning. A brief tone will sound.
If Activate automatically is switched on in the
Infotainment system and if the vehicle ap-
proaches an obstacle at speeds under approxi-
mately 6 mph (10 km/h), the parking aid will
switch on automatically. Audible signals will
sound once the obstacle is within the sensor de-
tection area.
Switching off automatically
The system switches off automatically when driv-
ing forward faster than 6 mph (10 km/h).
@ Tips
If you press the Ps button to switch the park-
ing aid off, it can only be reactivated automat-
ically when one of the following conditions is
met:
— The vehicle speed exceeds 6 mph (10 km/h)
— The ignition is switched off and back on
again
— The parking brake is set and then released
138


—The "P" selector lever position is engaged
and released again
Rearview camera
Introduction
Applies to: vehicles with rearview camera


B8V-0629

Fig. 133 Illustration: cross parking
The rearview camera helps you to park or maneu-
ver using the orientation lines.
Cee Mc Lo)
Applies to: vehicles with rearview camera



B8V-0522

Fig. 134 Area covered @ and area not covered (2) by the
rearview camera (example)

'8V-0099 Bi

Fig. 135 Luggage compartment lid: location of the rear-
view camera (example)

Driving safety

1 Coley maar Mela Mealy -aed (el)
Always use floor mats that can be securely at-
tached to the floor mat fasteners and do not in-
terfere with the free movement of the pedals.
> Make sure that the floor mats are properly se-
cured and cannot move and interfere with the
pedals > A\.
Use only floor mats that leave the pedal area un-
obstructed and that are firmly secured so that
they cannot slip out of position. You can obtain
suitable floor mats from your authorized Audi
Dealer.
Floor mat fasteners are installed in your Audi.
Floor mats used in your vehicle must be attached
to these fasteners. Properly securing the floor
mats will prevent them from sliding into posi-
tions that could interfere with the pedals or im-
pair safe operation of your vehicle in other ways.

ZA\ WARNING
Pedals that cannot move freely can result ina
loss of vehicle control and increase the risk of
serious personal injury.
— Always make sure that floor mats are prop-
erly secured.
— Never place or install floor mats or other
floor coverings in the vehicle that cannot be
properly secured in place to prevent them
from slipping and interfering with the ped-
als or the ability to control the vehicle.
— Never place or install floor mats or other
floor coverings on top of already installed
floor mats. Additional floor mats and other
coverings will reduce the size of the pedal
area and interfere with the pedals.
— Always properly reinstall and secure floor
mats that have been taken out for cleaning.
— Always make sure that objects cannot fall in-
to the driver footwell while the vehicle is
moving. Objects can become trapped under
the brake pedal and accelerator pedal caus-
ing a loss of vehicle control.



242
Active rollover
protection system
Applies to: vehicles with power top
The rollover protection system protects vehicle
occupants in the event of a rollover.

B8V-0333

Fig. 199 Rear seats: rollbar deployment range

B8V-0334


Fig. 200 Rear seats: deployed rollbar
The active rollover protection system consists of:
— two rollbars
— the safety belts with belt tensioners
— the windshield frame
—the rollover sensors
The active rollover protection system provides
additional safety in the event of a rollover. Within
milliseconds, sensors deploy two rollbars located
behind the head restraints in the rear seats
© fig. 200.
The rollbars, reinforced windshield frame and
belt tensioners help protect front and rear pas-
sengers in the event of a rollover.
The rollover protection system functions when
the power top is both open and closed.