Vauxhall ASTRA Owner's Manual page 220

Control indicator w
If control indicator w illuminates red while
driving, there is a loss of pressure. Stop
immediately and check tyre pressures. A
maximum speed of 50 mph (80 km/h) is
permitted for run-flat tyres 3. Observe the
information on page 230.
If the control indicator w illuminates yellow,
there is a fault in the system. Have the
cause of the fault eliminated by a
workshop. The self-diagnosis integrated
into the system facilitates rapid fault
identification.
The control indicator flashes three times
when the system is initialising.
9
Warning
The deflation detection system does 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.
Tyre pressure, see pages 227, 337.
System initialisation
After correcting tyre pressure or changing
a tyre/wheel, the system must be initialised:
With the ignition switched on, press the
DDS button for approx. 4 seconds. Control
indicator w flashes 3 times. The system is
operational after driving a certain
distance.
Only initialise the system if all tyres have
the prescribed pressure.
Driving and operation
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.
The current tyre pressures are displayed in
the Info 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.
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