105
Driving
06
The inflation pressures defined for the
vehicle can be found on the tyre pressure
►ꢀ In the event of a puncture, use the temporary
puncture repair kit or the spare wheel (depending
on equipment).
Tyre under-inflation
detection
label.
For more information on the Identification
markings, refer to the corresponding section.
This system alerts the driver if one or more tyres
Driving too slowly may not ensure
optimum monitoring.
suffer a drop in pressure.
The alert is raised when the vehicle is moving, not
when stationary.
The alert is not immediately triggered in the
event of a sudden loss of pressure or tyre blow-
out. This is because analysis of the values read
by the wheel's speed sensors can take several
minutes.
Checking tyre pressures
It compares the information given by the wheel
speed sensors with reference values, which must
be reinitialised every time the tyre pressures are
adjusted or a wheel changed.
This check should be done monthly when
the tyres are "cold" (vehicle stopped for 1 hour
or after a journey of less than 6 miles (10 km)
at moderate speeds).
The alert may be delayed at speeds below 25
mph (40 km/h), or when adopting a sporty
driving mode.
It takes into account the last values stored
during the reinitialisation request. It is therefore
essential that the tyre pressure is correct during
the operation. This operation is the driver’s
responsibility.
Otherwise, add 0.3 bar to the pressures shown
on the label.
The alert is kept active until the system is
reinitialised.
Under-inflation alert
This is signalled by the fixed illumination
of this warning lamp, accompanied by an
audible signal and, depending on equipment, the
display of a message.
The tyre under-inflation detection cannot,
in any circumstances, replace the need
for vigilance on the part of the driver.
This system does not avoid the need to
regularly check the tyre pressures (including
the spare wheel), especially before a long
journey.
Reinitialisation
►ꢀ The system must be reinitialised after any
adjustment to the pressure of one or more tyres,
and after changing one or more wheels.
►ꢀ Reduce speed immediately, avoid excessive
steering movements and avoid sudden braking.
►ꢀ Stop the vehicle as soon as it is safe to do so.
Before reinitialising the system, make
sure that the pressures of the four tyres
are correct for the conditions of use of the
vehicle and conform to the values written on
the tyre pressure label.
The loss of pressure detected may not
always cause visible deformation of the
tyre.
Driving with under-inflated tyres, particularly
in adverse conditions (heavy load, high speed,
long journey):
Do not rely on just a visual check.
– worsens road-holding.
– lengthens braking distances.
Check the pressures of the four tyres before
performing the reinitialisation.
►ꢀ Using a compressor, such as the one in
the temporary puncture repair kit, check the
pressures of all four tyres when cold.
– causes premature wear of the tyres.
– increases energy consumption.
The system does not advise if a pressure is
incorrect at the time of reinitialisation.
►ꢀ If it is not possible to carry out this check
immediately, drive carefully at reduced speed.
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