2.20
TYRE PRESSURE LOSS WARNING (1/3)
1
When fitted to the vehicle, this system
notifies the driver if one or more tyres
lose pressure.Operating principle
This system detects a loss of pressure
in one of the tyres by measuring the
wheel speed while driving.
Warning light
1 comes on to
alert the driver in the event of insuffi-
cient pressure (deflated wheel, punc-
tured tyre, etc.).
Operating conditions
The system should be reset with an
inflation pressure equal to that given
on the tyre inflation pressure label.
Otherwise it risks not giving a reliable
warning in the event of a significant loss
of pressure. Please refer to the informa-
tion on “Tyre pressures” in Section 4. In the following situations, the system
risk coming into action late or not func-
tioning correctly:
– system not reset after reinflation or
any operation on the wheels;
– system badly reset: different inflation pressures from the recommended
pressures;
– significant change in load or distribu- tion of load on one side of the vehi-
cle;
– sporty driving with strong accelera- tion;
– driving on snowy or slippery surface;
– driving with snow chains;
– fitting a single new tyre;
– use of tyres not approved by the net- work.
– ...
This function is an additional driving aid.
The function does not take the place of the driver. It cannot, therefore,
under any circumstances replace the vigilance or the responsibility of t\
he
driver.
Check the tyre pressures, including the emergency spare wheel, once a mo\
nth.
2.24
DRIVING CORRECTION DEVICES AND AIDS (2/5)
Electronic stability program
(ESC) with understeer control
and traction control
Electronic stability control ESC
This system helps you to keep control
of the vehicle in critical driving condi-
tions (avoiding an obstacle, loss of grip
on a bend, etc.).
Operating principle
A sensor in the steering wheel detects
the direction selected by the driver.
Other sensors throughout the vehicle
measure the actual direction.
The system compares driver input to
the actual trajectory of the vehicle and
corrects the trajectory if necessary by
controlling the braking of certain wheels
and/or engine power. In the event that
the system is engaged, indicator light
flashes on the instrument panel.Understeer control
This system optimises the action of the
ESC in the case of pronounced under-
steer (loss of front axle road holding).
Traction control
This system helps to limit wheelspin of
the drive wheels and to control the ve-
hicle when pulling away accelerating or
decelerating.
Operating principle
Using the wheel sensors, the system
measures and compares the speed of
the drive wheels at all times and slows
down their over-rotation. If a wheel is
starting to slip, the system brakes au-
tomatically until the drive supplied be-
comes compatible with the level of grip
under the wheel again.
The system also adjusts the engine
speed to the grip available under the
wheels, independently of the pressure
exerted on the accelerator pedal.
These functions are an ad-
ditional aid in the event of
critical driving conditions,
enabling the vehicle behav-
iour to be adapted to suit the driving
conditions.
However, the functions do not take
the place of the driver. They do
not increase the vehicle’s limits
and should not encourage you
to drive more quickly. Therefore,
they can under no circumstances
replace the vigilance or responsibil-
ity of the driver when manoeuvring
the vehicle (the driver must always
be ready for sudden incidents which
may occur when driving).
Operating faults
When the system detects an operat-
ing fault, the
© and warn-
ing lights come on and, depending on
the vehicle, the message “Check ESC”
appears on the instrument panel. In
this case, the ESC and traction control
system are deactivated.
Consult an approved dealer.
