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85
(Continued)
NOTE:
The TPMS Warning Light will illuminate in
the instr
ument cluster and a chime will
sound when tire pressure is low in one or
more of the four active road tires. In addi
-
tion, the instrument cluster will display a
graphic s
howing the pressure values of each
tire with the low tire pressure values in a
different color, or the Uconnect radio will
display a TPMS message, when this occurs
you must increase the tire pressure to the
recommended cold placard pressure in order
for the TPMS Warning Light to turn off.
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 decreases, 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 hou
r period. The cold tire inflation
pressure must not exceed the maximum
inflation pressure molded into the tire side
-
wall. Refer to “Tires” in “Servicing And
Maintenan
ce” for information on how to
properly inflate the vehicle’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 limit for any reason,
including low temperature effects and
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 pres
-
sure is at or above the recommended cold
placard p
ressure. Once the low TPMS
Warning Light illuminates, you must
increase the tire pressure to the recom
-
mended cold placard pressure in order for
the TPMS
Warning Light to turn off. The
system will automatically update and the
TPMS Warning 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 informa-
tion.
NOTE:
When filling warm tires, the tire pressure
m
ay 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.
For example, your vehicle may have a recom-
mended cold (parked for more than three
h
ours) pl
acard pressure of 30 psi (207 kPa).
If the ambient temperature is 68°F (20°C)
and the measured tire pressure is 27 psi
(186 kPa), a temperature drop to 20°F
(-7°C) will decrease the tire pressure to
approximately 23 psi (158 kPa). This tire
pressure is sufficiently low enough to turn on
the TPMS Warning Light. Driving the vehicle
may cause the tire pressure to rise to approx
-
imately 27 psi (186 kPa), but the TPMS
Warning L
ight will still be on. In this situa-
tion, the TPMS Warning Light will turn off
o
nly afte
r the tires are inflated to the
vehicle’s recommended cold placard pres
-
sure 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 opera
-
tion or sensor damage may result when
using rep
lacement equipment that is not
of the same size, type, and/or style.
Aftermarket wheels can cause sensor
damage.
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