Pontiac 2004 Grand Prix User Manual Page 350

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Tire Pressure Monitor System
This vehicle has the tire inflation monitor system, it 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 recalibrated.
See
DIC Warnings and Messages on page 3-65
for
more information.
This symbol, along with the
CHECK TIRE PRESSURE
warning message will
appear in the Driver
Information Center (DIC)
if the pressure in one tire
becomes 12 psi (83 kPa)
lower than the other
three tires.
The tire inflation 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 faster
than 70 mph (110 km/h).
The tire inflation 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 on
page 5-68
.
When the CHECK TIRE PRESSURE warning message
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 on page 5-78
). Also, check the
tire pressure in all four tires as soon as you can.
See
Inflation -- Tire Pressure on page 5-69
.
The CHECK TIRE PRESSURE warning message will
also be displayed (while the ignition is on) until you reset
(calibrate) the system. To reset the system, see “Tire
Inflation Monitor System” under the options mode in
DIC
Controls and Displays on page 3-45
.
Don’t reset the tire inflation 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.
Any time you adjust a tire’s pressure, rotate your tires,
or have one or more tires repaired or replaced, you’ll
need to reset (calibrate) the tire inflation monitor system.
You’ll also need to reset the system whenever you
buy new tires and whenever the vehicle’s battery has
been disconnected.
5-70
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