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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 oppor-
tunity. 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 maximum 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 vehi-
cle’s tires. The tire pressure will also increase 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
pressure 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 TPMS W arning Light to be turned off.
NOTE:
When filling warm tires, the tire pressure may
need to be increased up to an additional 4 psi
(28 kPa) above the recommended cold placard
pressure in order to turn the TPMS Warning
Light off.
The system will automatically update and the
TPMS W arning Light will extinguish once the
updated tire pressures have been received. The
vehicle may need to be driven for up to 20 min-
utes 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 TPMS W arning Light. Driving the vehicle
may cause the tire pressure to rise to approxi-
mately 28 psi (193 kPa), but the TPMS W arn-
ing Light will still be on. In this situation, the
TPMS W arning Light will turn off only after the
tires have been inflated to the vehicle’s recom-
mended cold tire pressure value.
SAFETY
88
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