Jeep Grand Cherokee SRT 2019 Owner's Manual page 101

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 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 recom-
mended cold tire pressure value.
CAUTION!
• The TPMS has been optimized for the
original equipment tires and wheels. TPMS
pressures and warnings have been estab-
lished for the tire size equipped on your
vehicle. Undesirable system operation or
sensor damage may result when using
replacement equipment that is not of the
same size, type, and/or style. The TPM
sensor is not designed for use on aftermar-
ket wheels and may contribute to a poor
overall system performance or sensor
damage. Customers are encouraged to
use OEM wheels to assure proper TPM
feature operation.
100
CAUTION! (Continued)
• Using aftermarket tire sealants may cause
the Tire Pressure Monitoring System
(TPMS) sensor to become inoperable. Af-
ter using an aftermarket tire sealant it is
recommended that you take your vehicle to
an authorized dealership to have your sen-
sor function checked.
• After inspecting or adjusting the tire pres-
sure, always reinstall the valve stem cap.
This will prevent moisture and dirt from
entering the valve stem, which could dam-
age the Tire Pressure Monitoring Sensor.
NOTE:
• The TPMS is not intended to replace normal
tire care and maintenance, or to provide
warning of a tire failure or condition.
• The TPMS should not be used as a tire
pressure gauge while adjusting your tire
pressure.
• Driving on a significantly under-inflated tire
causes the tire to overheat and can lead to
tire failure. Under-inflation also reduces fuel
efficiency and tire tread life, and may affect
the vehicle's handling and stopping ability.
(Continued)
• The TPMS is not a substitute for proper tire
maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure using
an accurate tire gauge, even if under-inflation
has not reached the level to trigger illumina-
tion of the TPMS Warning Light.
• Seasonal temperature changes will affect tire
pressure, and the TPMS will monitor the
actual tire pressure in the tire.
The Tire Pressure Monitor System (TPMS) uses
wireless technology with wheel rim-mounted
electronic sensors to monitor tire pressure lev-
els. Sensors, mounted to each wheel as part of
the valve stem, transmit tire pressure readings
to the Receiver Module.
Tire Pressure Monitor Display
NOTE:
It is particularly important, for you to regularly
check the tire pressure in all of your tires and to
maintain the proper pressure.