Tire Monitor - Introduction - Volvo S60 Owner's Manual

system that illuminates a low tire pressure telltale
( ) when one or more of your tires is signifi-
cantly under-inflated. Accordingly, when the low
tire pressure telltale illuminates, you should stop
and check your tires as soon as possible, and
inflate them to the proper pressure.
Driving on a significantly under-inflated tire cau-
ses the tire to overheat and can lead to tire fail-
ure. Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that a
tire pressure monitoring system is not a substi-
tute for proper tire maintenance, and it is the driv-
er's responsibility to maintain correct tire pres-
sure, even if under-inflation has not reached the
level to trigger illumination of the system's low
tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when the
system is not operating properly. The monitoring
system's malfunction indicator is combined with
the low tire pressure telltale.
When the system detects a malfunction, the tell-
tale will flash for approximately one minute and
then remain continuously illuminated. This
sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When
the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire
pressure as intended.
System malfunctions may occur for a variety of
reasons, including the installation of replacement
or alternate tires or wheels on the vehicle that
prevent the tire pressure monitoring system from
functioning properly.
Always check the system's malfunction telltale
after replacing one or more tires or wheels on
your vehicle to ensure that the replacement or
alternate tires and wheels allow the system to
continue to function properly.
NOTE
The system indicates low tire pressure but
does not replace normal tire maintenance. For
information on correct tire pressure, please
refer to the tire inflation decal on the driver's
door opening or consult your Volvo retailer.
WARNING
Incorrect inflation pressure could lead to tire
failure, resulting in a loss of control of the
vehicle.
Related information
•
Tire Monitor - introduction (p. 309)
•
Tire Pressure Monitoring System (TPMS) –
general information (p. 312)
WHEELS AND TIRES

Tire Monitor - introduction

Tire Monitor uses the rotational speed of the
tires in combination with signal analysis of the
ABS sensor signals to determine if they are
properly inflated.
When a tire is under-inflated, its diameter (and
consequently also its rotational speed) changes.
By comparing the individual tires with each other
it is possible to determine if one or more tires are
under inflated.
When low inflation pressure is detected or if the
system is not functioning properly, Tire Monitor
will light up the tire pressure warning light
( ) (also referred to as a telltale) in the
instrument panel and will display one of several
messages in the text window, for example:
pressure low Check tires
. Adjust the inflation
pressure and recalibrate if necessary.
NOTE
If a malfunction occurs in the system, the tire
pressure warning light will flash for approxi-
mately 1 minute and then remain illuminated.
Tire press. syst Service required
displayed.
Tire
will be
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309