255 Car care
Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the vehi-
cle’s handling and stopping ability.
Your vehicle has also been equipped with a
TPMS malfunction telltale to indicate when
the system is not operating properly. When
the malfunction telltale is illuminated, the
system may not be able to detect or signal
low tire pressure as intended. TPMS mal-
functions may occur for a variety of reasons,
including the installation of incompatible
replacement tires on the vehicle. Always
check the TPMS malfunction telltale after
replacing one or more tires on your vehicle
to ensure that the replacement tires are
compatible with the TPMS.
Tire pressure information is sent wirelessly
to the receiver.
The system checks the tire pressure when
the car is travelling over 18 mph (30 km/h).
The system is “self-learning”, which means
that the position of the wheels can be
changed without requiring adjustments to
the monitoring system. The spare wheel
does not have a sensor.
The sensor batteries have an average life of
10 years. The batteries cannot be changed
but require the sensor units to be replaced.
The system does not warn if a tire is overin-
flated.If the tire pressure drops
If the tire pressure drops 25% or more below
highest recommended pressure (see tire
pressure label on page 267), the SID will
issue a warning as to which tire is affected.
Adjust the tire pressure as soon as possible.If the vehicle is equipped with a different
wheel size than those fitted as standard and
therefore should use a different recom-
mended highest tire pressure the owner
shall contact a workshop to have the system
recalibrated. We recommend that you
contact a Saab dealer. Low tire pressure,
front left.
Make a safe stop.
Valve without sensor
Valve with sensor
93U S M 06.book Page 255 Friday, February 18, 2005 1:15 PM
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