218
Drive control systems
Tyre pressure monitoring
system
3
The tyre pressure monitoring system
continually checks the pressure and speed
of all four wheels while driving.
A pressure sensor is integrated in each
wheel. Once a minute, the pressure of each
tyre is sent to a control unit, where it is
compared. If the system detects one or
more pressure differences, a message
appears on the information display.
In vehicles with Graphical Information
Display
3
or Colour Information Display
3
and trip computer
3
,
current tyre pressures
can be shown in the information display.
For the system to be operational, all wheels
must be equipped with pressure sensors
and all tyres must be filled to the
prescribed pressure. The tyre pressure
monitoring system automatically detects if
the vehicle is being driven with a load of up
to 3 persons or a full load.
Once the ignition is switched on, the system
is operational and will continuously
monitor the tyre pressures at speeds of
approx. 20 mph (30 km/h) and above.
Tyre pressure – see pages 228, 326.
Picture no: 17334t.tif
Display of current tyre pressure
3
Select menu item
Tyres
from the
Board
Computer
menu.
The current pressure of each tyre is
displayed.
Warning messages
A message is given on the information
display to warn of inconsistent tyre
pressures. In some versions, the message is
displayed in abbreviated form.
For example, the following messages can
be displayed:
9
Warning
The tyre pressure monitoring systemdoes
not replace manual checks with a
suitable gauge.
Check tyre pressures at least every
14
days and prior to any long journey;
the tyres should be checked when cold.
Don’t forget to check the spare
3
.
Ü
Board Computer
BC 1
BC 2
Timer
Tyres