2.23
TYRE PRESSURE LOSS WARNING (2/7)
SYSTEM A
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 has to be reset with an in-
flation pressure equal to that written
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.
– ...
1
This function is an additio-
nal driving aid.
However, the function does
not take the place of the
driver. It cannot, therefore, under
any circumstances replace the vi-
gilance or the responsibility of the
driver.
Check the tyre pressures, including
the emergency spare wheel, once a
month.
2.26
TYRE PRESSURE LOSS WARNING (5/7)
SYSTEM B
Operating principle
Each wheel (except for the emergency
spare wheel) has a sensor in the infla-
tion valve which periodically measures
the tyre pressure while driving.
Warning light
1 comes on to
alert the driver in the event of insuffi-
cient pressure (deflated wheel, punc-
tured tyre, etc.). Resetting the standard level for the
tyre pressures
This should be performed:
– when the standard tyre pressure
needs to be changed to adapt to
usage conditions (empty, carrying a
load, motorway driving, etc.);
– after changing wheels around;
– after changing a wheel.
It should always be done after checking
the tyre pressure of all four tyres when
cold.
Tyre pressures must correspond to the
current usage of the vehicle (empty,
carrying a load, motorway driving, etc.).
This function is an addi-
tional driving aid.
However, the function does
not take the place of the
driver. It cannot, therefore, under
any circumstances replace the vig-
ilance or the responsibility of the
driver.
Check the tyre pressures, including
the emergency spare wheel, once a
month.
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