warning Seat Leon 2020 Repair Manual

Driving
Note
If the lane departure warning with rear
cr oss tr
affic alert does not work as descri-
bed in this chapter, stop using it and con-
tact a specialised workshop. Control lamp
Fig. 188
Control lamp of the lane departure
w arning. Fig. 189
Control lamp of the lane departure
w arning. It lights up
It turns on once briefly: the lane departure warning is
activ at

ed and ready to operate, i.e. when activating
the system.
It lights up continuously: the lane departure warning
has det ect

ed a vehicle in the blind spot. Flashes
A vehicle has been detected in the adjacent lane and
the t urn signal has been engaged in the dir

ection of
the detected vehicle

Driver assistance systems
Lane departure warning (Side As-
sist) The lane departure warning uses radar sen-
sors t
o monit
or the areas behind the vehicle
››› page 9. The system does this by measur-
ing the vehicle's distance from other vehicles
and its speed differential. The lane departure
warning will not work at speeds of less than
approx. 15 km/h (9 mph).
The lane width is not detected individually,
but is rather pre-configured in the system.
Thus if you are driving in wide lanes or in be-
tween two lanes, the indications may be in-
correct. Furthermore, the system can detect
vehicles driving in the lane next to you (if
there are any), and can also detect station-
ary objects such as dividers, and thus give an
incorrect indication.
Light indication
The control lamp provides an indication on
the corresponding side regarding the traffic
situation behind the vehicle, if it is deemed to
be critical. The control lamp of the left-hand
side ››› Fig. 188
indicates the traffic situation
to the rear left of the vehicle, and the control
lamp of the right-hand side ››› Fig. 189
, indi-
cates the traffic situation to the rear right of
the vehicle. Keep the warning lamps zone of the lane de-
part
ur

e warning free of objects, adhesives or
the likes that may interfere with your visibility.
Lane assist Plus. The Lane Assist Plus function can be used by
activ
ating the

Lane Assist ››› page 261
and
Side Assist functions. In this case its functions
are expanded as described below.
If the driver initiates a lane change manoeu-
vre in a potential critical situation:

Driving
Fig. 191
Schematic representation:
 Sit
ua-
tion of an o vertaking in the centre lane and
then moving into the right-hand lane.  Indica-
tion of the lane departure warning in the con-
trol lamp on the right side. In the following situations, an indication will
be displ
ayed in the contr

ol lamp ››› Fig. 190
 (arrow) or
››› Fig. 191
 (arrow):

Driver assistance systems
the side of the vehicle towards which traffic is
appr oaching in tr
ansverse direction 1)
.
Automatic braking to reduce damages
If the rear cross traffic alert detects that
someone else on the road is approaching the
rear of the vehicle and the driver does not
step on the brake, the system will engage the
brakes automatically.
The parking system helps the driver by auto-
matically engaging the brakes to reduce any
damage. The automatic intervention on the
brakes takes place when driving in reverse at
approx. 1-12 km/h (1-7 mph). After detecting
that the vehicle is stationary, the system
keeps it that way for around 2 seconds.
After automatically braking to reduce dam-
age, the system will not be able to automati-
cally brake again for approximately 10 sec-
onds.
You can interrupt the automatic braking by
stepping hard on the accelerator pedal or
the brake pedal in order to regain control of
the vehicle. WARNING
The smart technology incorporated into
the r ear cr

oss traffic alert cannot over- come the limits imposed by the laws of
physics; it only w
orks within the limits of the
syst

em. The parking assistant function
should not tempt you into taking any risks.
The system is not a replacement for driver
awareness.

Driving
system itself, the rear and side environment of
the v ehicl
e using the rear sensors
››› page 242. It detects moving objects that
approach from behind, such as cars
››› Fig. 193.
If a critical situation is detected when the
door is opened, it will be alerted by an acous-
tic signal on the door speaker of the corre-
sponding side ››› Fig. 194
. Additionally, the
control lamp of the lane departure warning of
the corresponding door will flash. If the door
has already been opened and another road
user has been detected in a critical situation,
the control lamp of the lane departure warn-
ing on the corresponding side will light up
permanently.
The brightness of the door opening warning
indication cannot be adjusted.
When you want to access the vehicle for the
first time, with the doors closed and locked,
the function will be available 3 minutes after
the first opening of any of the doors. The
function will continue to be available as long
as the vehicle has the ignition connected and
is not moving.
After switching off the ignition, the function
will remain available for approximately 3 mi-
nutes. After that time, the control lamps will
light up indicating the deactivation of the
function. WARNING

Braking and parking
harder, as the braking distance increases due
t o the l
ack of assistance from the servo brake. WARNING
Any anomaly in the brake system can in-
cr ease the br

aking distance, with the re-
sulting risk of an accident.

Driving
ignition, the function will remain on the next
time the ignition is s wit
ched on.
If the Auto Hold function was not switched on,
it will automatically remain off next time the
ignition is engaged.
The Auto Hold function connects automat-
ically if the following conditions are met
(all points must be met at the same time
››› ):
The v ehicl

e is kept stationary with the
brake pedal on a flat surface or on a
slope.
The engine rotates “correctly”.
The Auto Hold function is automatically
turned off if the following conditions are
met: If any of the conditions mentioned on
››› page 277, Conditions for keeping
the vehicle stationary with the Au-
to Hold function are no longer met.
If the engine is running irregularly or an
anomaly is detected.
If the engine stalls.
Manual gearbox: The clutch and the ac-
celerator are pressed at the same time.
Automatic gearbox: If the accelerator is
pressed
Automatic gearbox: If any of the tyres
has only minimal contact with the
1.
2.
1.
2.
3.
4.
5. ground, e.g. in the case of axle articula-
tion. WARNING
The smart technology incorporated into
the Aut o Hol

d function cannot defy the
laws of physics; it only works within the lim-
its of the system. The greater convenience
provided by the Auto Hold function should
never tempt you to take any risk that may
compromise safety.

Braking and parking
Brake assist systems Electronic Stability Control (ESC)
The ESC helps t
o impr
ove safety. It reduces
the tendency to skid and improves the stabili-
ty and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehicle
by braking individual wheels or by reducing
the engine torque. The warning lamp will
flash on the instrument panel when the ESC is
intervening !.
The ESC includes the anti-lock brake system
(ABS), the hydraulic brake assist (HBA), the
traction control system (TCS), electronic dif-
ferential lock (EDS), electronic torque control
(XDS) and the tractor-trailer sway mitiga-
tion*.
ESC also helps stabilise the vehicle by
changing the torque.
The TCS can be deactivated when wheel
spin is desirable ››› page 281
.
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up un-
der braking until the vehicle has reached a
virtual standstill. You can continue to steer the
vehicle even when the brakes are on full.
Keep your foot on the brake pedal and do not
pump the brakes. You will feel the brake pedal
pulsate while the ABS is working. If the running gear or brake system is modi-
fied, the eff
ectiv

eness of the ABS could be se-
verely limited.
Hydraulic Brake Assist (HBA)
The brake assist system can reduce the re-
quired braking distance. The braking force is
automatically boosted if you press the brake
pedal quickly in an emergency. You must
keep pressing the brake pedal until the dan-
ger has passed.
Traction control (TCS)
In the event of the wheels spinning, the TCS
reduces the engine torque to adapt to the
road condition. This helps the car to start
moving, accelerate or climb a gradient.
Electronic differential lock (EDL)
When the EDL detects wheelspin, it brakes
the spinning wheel and directs the power to
the other driven wheel. This function is active
up to approximately 100 km/h (62 mph).
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automati-
cally if subjected to excessive loads. The ve-
hicle can still be driven. The EDL will switch on
again automatically when the brake has
cooled down. Tractor-trailer sway mitigation*
If the vehicl
e is pulling a trailer, it will control
the following: tractor-trailers tend to sway.
When the swaying of the trailer is felt by the
vehicle and detected by the ESC, it will auto-
matically brake the towing vehicle within the
limits of the system and mitigate the sway.
Tractor-trailer sway mitigation is not available
in all countries ››› page 303
.
Electronic engine torque management
(XDS)
When taking a curve, the driveshaft differen-
tial allows the outer wheel to turn at a higher
speed than the inner wheel. In this way, the
wheel that is turning faster (outer wheel) re-
ceives less drive torque than the inner wheel.
This may mean that in certain situations the
torque delivered to the inner wheel is too
high, causing the wheels to spin. On the other
hand, the outer wheel is receiving a lower
drive torque than it could transmit. This can
cause a loss of grip on the drive axle, in this
case the front axle, which results in under-
steer or “lengthening” of the trajectory.
The XDS can detect and correct this effect
via the sensors and signals of the ESC.
Via the ESC, the XDS will brake the inside
wheel and counter the excess driving torque
of that wheel. This means that the requested
trajectory is much more precise. »
279

Help with parking and manoeuvring
WARNING
The technology used in the park assist sys-
t em inv
olves a series of limitations inherent
in the actual system and in the use of ultra-
sonic sensors. The use of Park Assist should
never tempt you to take any risk that may
compromise safety. The system is not a re-
placement for driver awareness.

Help with parking and manoeuvring
Visual indication segments Fig. 203
Parking aid view on the Infotainment
syst em displ
ay. The optical indication of the segments works
as f
oll

ows:
Grey segments: the obstacle is more
than approx. 30 cm away from the path
or in the direction opposite to travel.
They are also displayed when the elec-
tronic parking brake is activated.
Yellow segments: the obstacles lie on
the vehicle’s path and are at a distance
of less than approx. 30 cm away.
Red segments: obstacles are less than
approx. 30 cm away.
A wake will indicate the anticipated forward
or backward trajectory, depending on the en-
gaged gear. –
–
– If an obstacle is located in the vehicle’s way,
the corresponding audibl

e warning will
sound.
When the penultimate segment is displayed,
the vehicle has reached the collision zone. In
the collision zone, the obstacles are repre-
sented in red (including those out of the
path). Stop the vehicle! ››› in Introduction
on page 290, ››

› in Introduction on
page 290 !
Setting the indications and audio
signal s The indications and acoustic signals are set
in the Inf
ot

ainment system: function button 
> Driver assistance> Parking aid: Setup
Automatic activa-
tion On/off
Front volume* Volume in the front and rear
area.
R

ear volume* Volume in the rear area.
Adjust volume When the parking aid is
s
wit

ched on, the volume of
the audio source will be re-
duced, depending on the se-
lected option. Error messages
If a an error or fault message appears on the
instrument clust
er in P

ark Assist, there is a
fault.
If the fault doesn't disappear before discon-
necting the ignition, it will not be indicated
next time the parking aid is connected.
If a rear sensor is faulty, only the obstacles in
the areas A and
B are displayed
› ›

› Fig. 202. If a front sensor is faulty, only the
obstacles in the areas C and
D will be dis-
pl ayed. Symbol