Tire Pressure Monitor System
(TPMS)
NOTE:
For vehicles equipped with run flat tires — when
the TPMS indicates a tire pressure of 14 psi
(96 kPa) or lower, always check tire pressure
and replace the tire at the first opportunity. At
inflation pressure of/or below 14 psi (96 kPa) the
tire is in the run-flat mode of operation. In this
condition, it is recommended a vehicle maxi-
mum speed of 50 mph (80 km/h) for a maximum
distance of 50 miles (80 km). The manufacturer
does not recommend using the run flat feature
while driving a vehicle loaded at full capacity or
towing a trailer.
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure based
on the vehicle recommended cold tire pressure.
The tire pressure will vary with temperature by
about 1 psi (7 kPa) for every 12°F (6.5°C). This
means that when the outside temperature de-
creases, the tire pressure will decrease. Tire
pressure should always be set based on cold
inflation tire pressure. This is defined as the tire
pressure after the vehicle has not been driven
for at least three hours, or driven less than
1 mile (1.6 km) after a three-hour period. Refer
to “Tires” in “Servicing And Maintenance”
for information on how to properly inflate the
vehicle’s tires. The tire pressure will also in-
crease as the vehicle is driven - this is normal
and there should be no adjustment for this
increased pressure.
The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the low
pressure warning threshold for any reason, in-
cluding low temperature effects, or natural pres-
sure loss through the tire.
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 recommended cold tire pressure. Once
the low tire pressure warning has been illumi-
nated, the tire pressure must be increased to the
recommended cold tire pressure in order for the
Tire Pressure Monitoring Telltale Light to be
turned off.
NOTE:
When filling warm tires, the tire pressure may
need to be increased up to an additional 4 psi
(30 kPa) above the recommended cold placard
pressure in order to turn the Tire Pressure
Monitoring Telltale Light off.
The system will automatically update and the
Tire Pressure Monitoring Telltale Light will extin-
guish once the updated tire pressures have
been received. The vehicle may need to be
driven for up to 20 minutes above 15 mph
(24 km/h) to receive this information.
For example, your vehicle has a recommended
cold (parked for more than three hours) tire
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 pres-
sure to approximately 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 Monitoring
Telltale Light will turn off only after the tires have
been inflated to the vehicle’s recommended cold
tire pressure value.
CAUTION!
• The TPMS has been optimized for the
original equipment tires and wheels. TPMS
pressures and warnings have been estab-
lished 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 TPM
sensor is not designed for use on aftermar-
ket wheels and may contribute to a poor
overall system performance or sensor
damage. Customers are encouraged to
use OEM wheels to assure proper TPM
feature operation.
(Continued)
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