(Tpms) - Jeep CHEROKEE 2020 Owner's Manual

T P M
IRE RESSURE ONITORING

(TPMS)

The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure based
on the vehicle recommended cold placard
pressure.
The tire pressure will vary with temperature by
approximately 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
hour period. The cold tire inflation pressure
must not exceed the maximum inflation
pressure molded into the tire sidewall. The tire
pressure will also increase as the vehicle is
driven. This is normal and there should be no
adjustment for this increased pressure.
Refer to "Tires" in "Servicing And Maintenance"
for information on how to properly inflate the
vehicle's tires.
S
The TPMS will warn the driver of a low tire
YSTEM
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 pressure is at
or above the recommended cold placard
pressure. Once the low tire pressure warning
(Tire Pressure Monitoring Warning Light)
illuminates, you must increase the tire pressure
to the recommended cold placard pressure in
order for the "Tire Pressure Monitoring Warning
Light" to turn off.
The system will automatically update and the
"Tire Pressure Monitoring 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
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 Warning Light." Driving the vehicle
may cause the tire pressure to rise to
approximately 28 psi (193 kPa), but the "Tire
Pressure Monitoring Warning Light" will still be
on. In this situation, the "Tire Pressure
Monitoring Warning 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 increased up to an additional 4 psi
(28 kPa) above the recommended cold placard
pressure in order to turn the Tire Pressure Moni-
toring Warning Light off.
SAFETY 143
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