−
For example, your vehicle may have a rec-
ommended cold (parked for more than three
hours) placard pressure of 33 psi (227 kPa).
If the ambient temperature is 68°F (20°C)
and the measured tire pressure is 28 psi
(193 kPa), a temperature drop to 20°F (-7°C)
will decrease the tire pressure to approxi-
mately 24 psi (165 kPa). This tire pressure is
sufficiently low enough to turn on the Tire
Pressure Monitoring Telltale light. Driving the
vehicle may cause the tire pressure to rise to
approximately 28 psi (193 kPa), but the Tire
Pressure Monitoring Telltale Light will still be
on. In this situation, the Tire Pressure Moni-
toring Telltale Light will turn off only after the
tires are inflated to the vehicle’s recom-
mended cold placard pressure value.
CAUTION!
•
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures
and warning have been established for the tire
size equipped on your vehicle. Undesirable
system operation or sensor damage may re-
sult when using replacement equipment that
is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor dam-
age. Do not use aftermarket tire sealants or
balance beads if your vehicle is equipped with
a TPMS, as damage to the sensors may
result.
•
After inspecting or adjusting the tire pressure,
always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the
valve stem, which could damage the Tire
Pressure Monitoring Sensor.
NOTE:
•
The TPMS is not intended to replace normal
tire care and maintenance, or to provide
warning of a tire failure or condition.
•
The TPMS should not be used as a tire
pressure gauge while adjusting your tire
pressure.
•
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.
•
The TPMS is not a substitute for proper tire
maintenance, and it is the driver’s responsi-
bility to maintain correct tire pressure using
an accurate tire pressure gauge, even if
under-inflation has not reached the level to
trigger illumination of the Tire Pressure
Monitoring Telltale light.
•
Seasonal temperature changes will affect
tire pressure, and the TPMS will monitor the
actual tire pressure in the tire.
Base System — If Equipped
The Tire Pressure Monitor System (TPMS) uses
wireless technology with wheel rim mounted elec-
tronic sensors to monitor tire pressure levels.
Sensors, mounted to each wheel as part of the
valve stem, transmit tire pressure readings to the
receiver module.
NOTE:
It is particularly important for you to check the
tire pressure in all of the tires on your vehicle
monthly and to maintain the proper pressure.
The TPMS consists of the following components:
•
Receiver Module
147
Summary of Contents for Cherokee 2009
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Page 50: ...Rear Window Defroster If Equipped 89 ROOF LUGGAGE RACK IF EQUIPPED 90 47...
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Page 106: ...Compass Variance Map 103...
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Page 123: ...Control Setting Suggestions for Various Weather Conditions 120...
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Page 210: ...9 IF YOU NEED CONSUMER ASSISTANCE IF YOU NEED ASSISTANCE 208 207...
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