Tire Pressure Monitor System (Tpms) - Jeep 2011 WK2 Grand Cherokee Owner's Manual

reasons for any rapid or unusual wear should
be corrected prior to rotation being performed.
NOTE:
The premium Tire Pressure Monitor System
will automatically locate the pressure values
displayed in the correct vehicle position
following a tire rotation.
The suggested rotation method is the "forward-
cross" shown in the following diagram.
Tire Rotation
232
TIRE PRESSURE MONITOR SYSTEM
(TPMS)
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure based
on the vehicle recommended cold tire pres-
sure.
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 – General Information" in "Starting
and Operating" 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 threshold for any reason,
including 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 TPM Telltale is illuminated and the "TIRE
LOW PRESSURE" message appears, the tire
pressure must be increased to the recom-
mended cold tire pressure in order for the TPM
Telltale and the "TIRE LOW PRESSURE" mes-
sage to be turned off. The system will automati-
cally update and the TPM Telltale and the "TIRE
LOW PRESSURE" message will turn off 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 display
the TPM Telltale and the "TIRE LOW PRES-
SURE" message. Driving the vehicle may