Oldsmobile 2001 Alero - Manual (Page 277)

6-39
Tire Pressure Monitor System (If Equipped)
The tire pressure monitor system can alert you to a large
change in the pressure of one tire. The system “learns” the
pressure at each tire throughout the operating speed range
of your vehicle. The system normally takes between
45 and 90 minutes of driving to learn the tire pressures.
This time may be longer depending on your individual
driving habits. Learning need not be accumulated during
a single trip. Once learned, the system will remember the
tire pressures until the system is reset.
After the system has learned tire pressures with properly
inflated tires, the LOW TIRE PRESSURE light will come
on if the pressure in one tire becomes 12 psi (83 kPa) lower
than the other three tires. The tire pressure monitor system
won’t alert you if the pressure in more than one tire is low,
if the system is not properly calibrated, or if the vehicle is
moving at less than 15 mph (25 km/h), faster than 75 mph
(120 km/h), on rough roads or during turns. The light may
also come on if you are driving on partially cleared
pavement or on gravel roads.
The tire pressure monitor system detects differences in tire
rotation speeds that are caused by changes in tire pressure.
The system can alert you about a low tire
-- but it doesn’t
replace normal tire maintenance. See “Tires” in the Index.
If the anti - lock brake system warning light comes on,
the tire pressure monitor system may not be working.
See your dealer for service. Also, see “Anti
- Lock Brake
System Warning Light” in the Index.
When the LOW TIRE PRESSURE light comes on, you
should stop as soon as you can and check all your tires for
damage. If a tire is flat, see “If a Tire Goes Flat” in the
Index. Also check the tire pressure in all four tires as soon
as you can. See “Inflation
- Tire Pressure” in the Index.
The light will come on and stay on, when the ignition is
ON, until the tire pressure condition is corrected and
you RESET the system. The light may come on and then
go out when driving on partially cleared pavement or on
gravel roads. Under these conditions, you do not need to
reset the tire pressure monitor.
Don’t reset the tire pressure monitor system without first
correcting the cause of the problem and checking and
adjusting the pressure in all four tires. If you reset the
system when the tire pressures are incorrect, the system
will not work properly and may not alert you when a
tire is low.