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236 SAFETY
The TPMS will continue to warn the driver of low
tire pressure as long as the condition exists, and
will not turn off until the tire pressure is at or above
the recommended cold placard pressure. Once the
low tire pressure warning (Tire Pressure Monitoring
System Light) illuminates, you must increase the
tire pressure to the recommended cold placard
pressure in order for the TPMS Warning Light to
turn off.
The system will automatically update and the Tire
Pressu
re Monitoring System Light will turn off once
the system receives the updated tire pressures.
The vehicle may need to be driven for up to
20
minutes above 15 mph (24 km/h) in order for
the TPMS to receive this information.
For example, your vehicle may have a recommended
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
approximately 24 psi (165 kPa). This tire pressure is
low enough to turn on the Tire Pressure Monitoring
System Light. Driving the vehicle may cause the tire
pressure to rise to approximately 28 psi (193 kPa),
but the Tire Pressure Monitoring System Light will
still be on. In this situation, the Tire Pressure
Monitoring System Light will turn off only after the
tires are inflated to the vehicle’s recommended cold
placard pressure value.
NOTE:
When filling warm tires, the tire pressure may need
to be i
ncreased up to an additional 4 psi (28 kPa)
above the recommended cold placard pressure in
order to turn the Tire Pressure Monitoring System
Light off.
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, unless
your vehicle is equipped with a Tire Fill Alert
(TFA) system.
Driving on a significantly underinflated tire
causes the tire to overheat and can lead to tire
failure. Underinflation also reduces fuel effi
-
ciency and tire tread life, and may affect the
vehicl
e’s handling and stopping ability.
The TPMS is not a substitute for proper tire
maintenance, and it is the driver’s responsibility
to maintain correct tire pressure using an accu
-
rate tire pressure gauge, even if underinflation
has not
reached the level to trigger illumination
of the Tire Pressure Monitoring System Light.
Seasonal temperature changes will affect TPMS
information on your instrument cluster
Ú page 349.
Base System
The Tire Pressure Monitoring System (TPMS) uses
wireless technology with wheel rim mounted
electronic 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.
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 result
when using replacement equipment that is not
of the same size, type, and/or style. The TPMS
sensor is not designed for use on aftermarket
wheels, and may contribute to a poor overall
system performance. Customers are encour
-
aged to use OEM wheels to ensure TPMS feature
o
peration.
Using aftermarket tire sealants may cause the
Tire Pressure Monitoring System (TPMS) sensor
to become inoperable. After using an after
-
market tire sealant it is recommended that you
take y
our vehicle to an authorized dealer to have
your sensor function checked.
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 TPMS sensor.
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