99
157
C4-2_en_Chap09_conduite_ed01-2014
LANE DEPARTURE WARNING SYSTEM
The lane departure warning sys -
tem cannot in any circumstanc -
es
replace
the
need
for
vigilance
on
the part of the driver.
It
is
necessary
to
observe
driv
-
ing
regulations
and
take
a
break
every
two hours.
Activation
F Press this button, the indicator lamp comes
on.
Deactivation
F Press this button again, the indica -
tor lamp goes off.
The
status
of
the
system
remains
in
the
memory
when
the
ignition
is
switched
of
f.
Detection
You are warned by the vibration of the driver's
seat cushion:
-
on
the
right-hand
side,
if
the
mark
-
ing
on
the
ground
has
been
crossed
on
the right,
-
on
the
left-hand
side,
if
the
marking
on
the
ground
has
been
crossed
on
the
left.
No
warning
is
transmitted
while
the
direction
indicator
is
active
and
for
ap
-
proximately
20
seconds
after
the
direc
-
tion
indicator is switched off.
A
warning
may
be
transmitted
if
a
direc
-
tion
marking
(e.g.
arrow)
or
non-standard marking
(e.g. graffiti) is crossed.
Operating fault
The detection may be impeded:
-
if
the
sensors
are
dirty
(mud,
snow
...),
-
if
the
markings
on
the
ground
are worn,
-
if
there
is
little
contrast
be
-
tween
the
markings
on
the
ground
and
the
road
surface.
System
which
detects
the
involuntary
crossing
of
longitudinal
traffic
lane
markings
on
the
ground
(solid
or
bro
-
ken
line).
Sensors,
fitted
below
the
front
bumper
,
trigger
a
warning
if
the
vehicle
drifts
over
a
lane
marking
(speed
higher
than
50
mph
(80
km/h)).
This
system
is
particularly
useful
on
motorways
and
main
roads. In
the
event
of
a
malfunction,
the
service
warning
lamp
comes
on,
accompanied
by
an
audible
signal
and
a
message
in
the
screen.
Contact
a
CITROËN
dealer
or
a
quali
-
fied
workshop.
DRIVING
