pre sense fault AUDI Q2 2021 Owner´s Manual

Instruments and controls

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Hill hold assist

^>page
33
Rear seat belt
/
^>page
31
Rear seat belt
/
^>page
31
Child lock
(electric)*

cépage
46
AdBlue*

^page
292

Kfl I ^
page 122
Rest recommendation*

^>page
110
Speed warning function*

cépage
104
Cruise control system*

^>page
104
Speed limiter*

^>page
106
Park assist*

^>page
139
Park assist*

^>page
139
Adaptive cruise control*

^>page
114
Adaptive cruise control*

tapage
114
Active Lane assist*

tapage
124
Side assist*

tapage
131
Pre sense*
Camera-based traffic sign recogni­

tion*

^>
page 108
Main beam assist*

^>
page 50
Main beam headLights

Pipage
50
(©) Brake system
If the warning Lamp Lights up, there is a fault in
the brake system.
| Stop vehicle and check brake fluid level
Stop the vehicle and check the brake fluid level.
Obtain professional assistance if necessary.
| Warning! Brake servo inoperative!
You need to apply much more force to operate
the brakes if the brake servo fails. Obtain profes­
sional assistance.
| Brakes: fault. Safely stop vehicle
If the warning lamp lights up and the message
appears, there is a fault in the brake servo.
If the ABS indicator lamp
[g]
and ESC indicator
lamp
I^J
light up together with the brake warn­
ing
Lamp||
and this driver message appears,
the ABS, ESC and brake force distribution sys­
tems have failed
•=> A-

Do not drive on. Please seek professional assis­
tance
^A-

| Parking brake system fault! See owner's
manual
- If the warning lamp and the message appear
after you switch on the ignition when the ve­
hicle is stationary, please check whether you
can release the parking brake. If the parking
brake cannot be released you should obtain
professional assistance. If the parking brake
can be released but the message
stilL
appears,
drive to a qualified workshop without delay and
have the fault rectified.
- If the warning lamp and the message appear
while driving, there may be a malfunction in
the parking brake auto release or the emergen­
cy brake functions. You may not be able to ap­
ply or release the parking brake. Do not park
the car on a gradient. Obtain professional assis­

tance.

Brake servo: restricted. You can continue driv­

ing.
Please contact workshop
There is a fault with the brake servo. The brake
servo remains available with reduced capacity.
29

Driver assist systems
This message appears if the radar sensor vision is

impaired,
e.g. by leaves, snow, heavy road spray
or dirt. Clean the sensor
<^>page
112, Fig. 101.
Distance warning: currently unavailable. See
owner's manual
This driver message will appear if the system
fails temporarily. If the fault occurs repeatedly,
drive to a qualified workshop and have the fauLt

rectified.

Fasten seat belt
The system is not fully available when the driver's
seat belt is unfastened.
Stationary object ahead
This message appears if
you
try to switch on the
system when a stationary object is located imme­
diately in front of your car.
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
The pre sense functions can take action to pro­
tect the vehicle occupants and other road users in
certain hazardous conditions within the system

limits.

- Because the different on-board systems are

networked,
pre sense basic can detect critical
situations and take preventive action to protect
the occupants.
- The pre sense front uses the data of the radar
sensor to calculate the probability of an
acci­

dent
opage
112. It can detect an impending
collision with vehicles or
pedestrians1^
(subject
to general system limitations). In this case, the
system warns the driver visually, acoustically

and,
if necessary, with a short, sharp brake ap­

plication.
If necessary, it can initiate a partial or

fuLl
brake application in order to reduce the im­
pact speed or, in certain circumstances, to
avoid a collision. In conjunction with pre sense
basic, the reversible tensioners on the front
seat belts are also applied if necessary. Pre
sense front is active even when the adaptive
cruise control* is switched off.
Please observe the general safety warnings

•=>
A in General notes on page 112.
© Note
- Certain pre sense functions are deactivated
when reversing.
- The functions of the pre sense system may
also be unavailable if
a
fault develops in the

ESC
system or airbag control unit.
- Please note that, if the front passenger's
airbag has been deactivated, the reversible
belt tensioner on the passenger's side will
be deactivated as
well.

- Switch off pre sense on private roads and
while the vehicle is being loaded onto a car
transporter, train or ferry, etc. This prevents
the pre sense system from taking action in
an inappropriate situation.
Audi pre sense basic
Description
Applies to: vehicles with Audi pre sense basic
The pre sense basic functions are activated at
speeds above approximately 30 km/h.
The system can activate the following functions
in certain situations:
- Seat belt tensioning (e.g. during hard braking):
The seat belts on the front seats have reversi­
ble tensioners. Provided an accident does not
occur, the belts are loosened again slightly and
kept ready for activation.
- Initiation of the closure process for the
win­

dows and panorama sun roof* (e.g. if the
vehi­

cLe understeers or oversteers).
Audi drive select*: the activation threshold
dif­

fers according to the mode selected.

x)
Not available on vehicles for some markets.
120

Driver assist systems
provided tempt you into taking any risks when
driving - this can cause accidents.
- Please note that pre sense front can give
warnings or apply the brakes unexpectedly.
Always secure your luggage to prevent dam­
age and possible injury.
- Due to inherent system limitations, false ac­
tivation of the system is possible.
- Please note that the sensor is not always
able to detect all objects which may repre­
sent a potential hazard - risk of accident!
- Pre sense front does not react to the follow­

ing:
oncoming traffic in the same lane, sta­
tionary or stopped persons, pedestrians
crossing the road at an angle, groups of
people, animals, or objects that are hard to

recognise •=>
A in General notes on
page 112.
A WARNING
The pre sense front functions may be restric­
ted or unavailable in situations such as the

following:

- If objects such as crash barriers or other
vehicles are reflecting additional light.
- At tunnel entrances.
- In heavy fog,
rain,
road spray or snow.
- If the radar sensor is dirty, frosted, dam­
aged or covered.
- When driving through a corner.
-Applies to: front-wheel drive vehicles: If the
ESC system has been partially or fully deac­

tivated.

© CAUTION
Impacts or damage to the bumper, wheel
arches or underbody can cause misalignment
of the sensor. This can impair the function of
the pre sense front system. Have the systems
checked by a
quaLified
workshop.
© Note
-The automatic brake application with in­
creasing brake force can be cancelled by ap­
plying the brakes yourself or by pressing the
accelerator firmly or by taking evasive ac­

tion.

- Applies to: front-wheel drive vehicles: Cer­
tain pre sense front functions are deactiva­
ted when the ESC
offroad
mode is switched
on and when reversing.
- Applies to: front-wheel drive vehicles: The
pre sense is deactivated if you restrict or
switch off the ESC
^>page
146.
Settings on the infotainment system
Applies to: vehicles with Audi pre sense front/Audi adaptive
cruise control

•
Select the following on the infotainment sys­

tem:
|MENU|
button > Car > left control button
> Driver assist > Audi pre sense.
System - The pre sense functions can be switched
on/off.
Advance
warning15
- You can switch the advance
warning off or set the warning time for pre sense
front (early/medium/late).
Start by setting the advance warning to early. If
you then find that the system warns you earlier
than desired, you can set the advance warning to

medium.
The advance warning should be set to
late only in exceptional cases, such as during very
dynamic driving.
If a system or the advance warning function is
switched off, it will be automatically activated
again the next time you switch on the
ignition15.

Driver messages
Applies to: vehicles with Audi pre sense
Audi pre sense: fault. Please contact work­
shop
This message appears if the functions of the pre
sense system are impaired. An impairment can
occur, for example, if a sensor fails. If the mes­
sage remains displayed permanently, drive to a
qualified workshop soon and have the fault
recti­

fied.
•

x)
Not available on vehicles for some markets.
122

Driver assist systems

H
Audi pre sense: currently restricted. Sensor
view restricted due to surroundings.
This message appears if the radar sensor vision is

impaired,
e.g. by leaves, snow, heavy road spray
or dirt. If necessary, clean the sensor

*$
page 112, Fig. 101.

[^
Audi pre sense: currently restricted
This message appears in certain situations, e.g.
when the ESC is partially or fully deactivated.

Q
Audi pre sense: currently restricted. See
owner's manual
Applies to: vehicles with Audi side assist
If
you
operate the turn signals while the active
lane assist and side assist are active, the steering
will be corrected just before you cross the lane
demarcation if the side assist detects vehicles ap­
proaching quickly or travelling at about the same
speed as your own vehicle and judges the situa­
tion to be critical. This intervention is intended to
keep the vehicle in the Lane.
Applies to: vehicles without Audi side assist
The system does not warn you if
you
operate the
turn signal before crossing a Lane marking. In
this case, it assumes that you intend to change

lanes.

Applies to: vehicles with traffic jam assist
The traffic jam assist can be activated at speeds
below approximately 65 km/h if the correspond­
ing conditions have been met
^page
117.
•
123
This driver message appears if one or more sub­
systems, such as the
ESC,
fails temporarily. If the
message is displayed several times, drive to a
qualified workshop and have the fault rectified.

[g]
Audi pre sense: emergency braking system

off

This message appears if the functions of the pre
sense system are deactivated via the infotain­
ment system or if the system is not available.
Audi active Lane assist
Description
Applies to: vehicles with Audi active lane assist
The active lane assist (lane departure warning
feature) uses a camera in the windscreen to de­
tect lane markings (subject to general system
limitations). If
you
approach one of the detected
lane markings, the system corrects the steering
to warn you that the vehicle might be about to
cross one of the markings. You can override this
steering input at any time. The steering wheel vi­
brates slightly if
you
cross a lane marking. The vi­
bration warning must be activated beforehand on
the infotainment system. The active lane assist is
functional when it detects a demarcation line on
at least one side of the lane in which you are driv­

ing.

As the system is designed for driving on motor­
ways and other major roads, it is only active

§
above a speed of about 65 km/h (may vary in dif-

£
ferent export markets).
r\i

.-H

00
A WARNING
- The system initiates a corrective steering in­
put to warn the driver that the vehicle is
about to leave the lane. As the driver you
are always responsible for staying in your
own lane.
- The system can assist you to keep the
vehi­

cle in the lane, however it is not capable of
driving on its own. Never take your hands
off the steering wheel.
- In certain situations, e.g. during heavy brak­

ing,
the system may not correct the steer­

ing.

- In certain circumstances, not all of the lane
markings may be detected by the camera. A
corrective steering input can only be
initi­

ated if the system detects a lane marking on
the side in question.
- Variations in the road surface or objects on
the road may be misinterpreted as lane
markings. In this case, the steering may be
corrected unexpectedly or not at all.
- The camera's view might be obstructed, for
example by vehicles travelling in front,
rain,

snow, a lot of water on the
road,
adverse
light
or
dirt on the windscreen. If this hap­

pens,
the active lane assist may not detect