Cadillac 2005 XLR - Manual (Page 363)

Tire Pressure Monitor System
The Tire Pressure Monitor (TPM) System on your vehicle,
uses radio and sensor technology to check tire pressure
levels. Sensors, mounted on each tire and wheel
assembly transmit tire pressure readings to a receiver
located in the vehicle. The TPM sensors transmit tire
pressure readings once every 60 seconds while the
vehicle is being driven and once every 60 minutes when
the vehicle is stationary for more than 15 minutes. Using
the Driver Information Center (DIC), tire pressure levels
can be viewed by the driver. The TPM system also uses
the DIC to warn the driver when air pressure, in one or
more tires, falls below 25 psi (172 kPa) or is above
42 psi (290 kPa). For additional information and details
about the DIC operation and displays see DIC Controls
and Displays on page 3-61 and DIC Warnings and
Messages on page 3-64.
A low tire warning light also appears on the instrument
panel cluster when a low tire condition exists. The
DIC message, CHECK TIRE PRESSURE and the low
tire pressure warning light will be shown each time
the engine is started and stay on until the low tire
condition is corrected.
When the tire pressure
monitoring system warning
light is lit, one or more
of your tires is significantly
under-inflated.
You should stop and check your tires as soon as
possible, and inflate them to the proper pressure as
indicated on the vehicle’s tire information placard.
Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may
affect the vehicle’s handling and stopping ability. Each
tire, including the spare, should be checked monthly
when cold and set to the recommended inflation pressure
as specified in the vehicle placard and owner’s manual.
The Tire and Loading Information Label (tire information
placard) is on the rear edge of the driver’s door, below the
door latch. This label shows the size of your vehicle’s
original tires and the correct inflation pressure for your
vehicle’s tires when they are cold. See Loading Your
Vehicle on page 5-30.
Your vehicle’s TPM system can alert you about a low or
high tire pressure condition but it does not replace
normal tire maintenance. See Tire Inspection and
Rotation on page 6-57
6-55