Lane Departure Warning System - CITROEN DS4 Owner's Handbook Manual

Lane departure warning system

System which detects the involuntary crossing
of longitudinal traffic lane markings on the
ground (solid or broken 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.
The lane departure warning system
cannot, in any circumstances, replace
the need for vigilance and responsibility
on the part of the driver.
Activation
Press this button, the indicator lamp comes
on.
Deactivation
Press this button again, the indicator lamp
goes off.
The status of the system remains in the
memory when the ignition is switched off.
Detection
You are warned by the vibration of the driver's
seat cushion:
- on the right-hand side, if the marking 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 approximately
20 seconds after the direction indicator is
switched off.
A warning may be transmitted if a direction
marking (e.g. arrow) or non-standard marking
(e.g. graffiti) is crossed.
Operating fault
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 qualified
workshop.
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 between the
markings on the ground and the
road surface.
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Driving