CAUTION!
● Tire pressure must be check
ed with tires cold.
Should it become necessary for whatever reason
t
o check pressure with warm tires, do not reduce
pressure even though it is higher than the
prescribed value, but repeat the check when tires
are cold.
● The iTPMS cannot indicate sudden tire pressure
drops (for example when a tire bursts). In this
case, stop the vehicle, braking with caution and
avoiding abrupt steering.
● The system only warns that the tire pressure is
low: it is not able to inflate them.
● Insufficient tire inflation increases electrical
energy consumption, reduces the tread duration
and may affect your ability to drive safely.
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 tem
perature 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-hour period. The tire
pressure will also increase as the vehicle is driven —
this is normal and there should be no adjustment for
this increased pressure.
For information on how to properly inflate the vehicle’s
tires, see
ð
page 196.
The iTPMS will warn the driver of a low tire pressure if
the tire pressure falls below the low pressure warning
threshold for any reason, including low temperature
effects, or natural pressure loss through the tire.
The iTPMS will continue to warn the driver of lo
w
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 illuminated, the tire
pressure must be increased to the recommended cold
tire pressure and a reset procedure performed in order
for the TPMS Warning 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
Warning Light will extinguish once the updated tire
pressures have been received. The vehicle may need
to be driven for up to 20 minutes above 50 mph (80
km/h) to receive this information.
For example, your vehicle has a recommended cold
(parked for more than three hours) tire pressure of
36 psi (248 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 sufficiently low enough to turn
on the TPMS Warning Light. Driving the vehicle may
cause the tire pressure to rise to approximately 28
psi (193 kPa), but the TPMS Warning Light will still
be on. In this situation, the TPMS Warning Light will
turn off only after the tires have been inflated to the
vehicle’s recommended cold tire pressure value and a
reset procedure performed.
Tire Pressure Monitoring System Low
Pressure Warnings
The TPMS Warning Light will illuminate
in the instrument cluster, and an audible
chime will be activat
ed, when one or more
of the four active road tire pressures are
low. In addition, the instrument cluster will display a
graphic display of the pressure value(s) with the low
tire(s) in a different color
ð
page 57.
NOTE:
Your system can be set to display pressure units in PSI,
BAR, or kPa.
Low Tire Pressure Monitoring System Display
Should a low tire condition occur on any of the four
active road tire(s), you should st
op as soon as possible,
and inflate the low tire(s) that is in a different color on
the graphic display to the vehicle’s recommended cold
tire pressure.
142 SAFETY
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