Wheels and tyres
Tyre pressure monitor system
303
Tyres with directional tread pattern
Tyres with directional tread pattern have been
designed to operate best when rotating in only
one direction. An arrow on the tyre sidewall
indicates the direction of rotation on tyres with
directional tread. Always observe the indicated
direction of rotation in order to guarantee op-
timum grip and help avoid aquaplaning, exces-
sive noise and wear.
If the tyre is mounted in the opposite direction
of rotation, drive with extreme caution, as the
tyre is no longer being used correctly. This is of
particular importance when the road surface is
wet. Change the tyre as soon as possible or re-
mount it with the correct direction of rotation.
Works after changing a wheel
•
Replace the wheel bolt caps.
•
Return all tools to their proper storing loca-
tion.
•
If the replaced wheel does not fit in the spare
wheel housing, store it safely in the luggage
compartment
•
Check the tyre pressure of the newly moun-
ted tyre as soon as possible.
•
In vehicles fitted with a tyre pressure indica-
tor, adjust the pressure and store it in memory
•
Have the tightening torque of the wheel nuts
checked as soon as possible with a torque
wrench
. Meanwhile, drive care-
fully.
•
Have the flat tyre replaced as quickly as pos-
sible.
Tyre pressure monitor sys-
tem
Control lamp
It lights up
The inflation pressure of one or more
wheels is much lower than the value
set by the driver, or the tyre has structural
damage.
In addition, a audible warning sounds and
a text message is displayed on the instru-
ment panel screen.
Stop the vehicle!
Stop the vehicle
safely as soon as possible. Check all
tyres and pressures. Replace any damaged
tyres.
Flashes
System fault
The control lamp flashes for approxi-
mately 1 minute and then lights up perma-
nently.
If the tyre is inflated correctly, switch
the ignition off and on again. Re-cali-
brate the tyre pressure monitor indicator
. If the fault continues, go to
a specialised workshop.
Several control and warning lamps light up for
a few seconds when the ignition is switched on
while the function is verified. They will switch
off after a few seconds.
WARNING
Observe the safety warnings
.
Tyre pressure monitor indicator
Fig. 203
Instrument panel: warning of loss
of tyre pressure.
The tyre pressure monitoring system compares
the individual speeds of each wheel and thus
the dynamic radius with the help of the ABS
sensors.
