Jeep GRAND CHEROKEE 2021 Owner's Manual page 276

274 SAFETY
NOTE:
There is no Tire Pressure Monitoring System
sensor in the spare tire. The TPMS will not be
able to monitor the tire pressure. If you install
the spare tire in place of a road tire that has a
pressure below the low-pressure warning limit,
upon the next ignition switch cycle, the Tire
Pressure Monitoring System Warning Light will
remain on, a chime will sound, and the instru-
ment cluster display will still display a pressure
value in the different color graphic display and
an "Inflate to XX" message will be displayed.
After driving the vehicle for up to 20 minutes
above 15 mph (24 km/h), the Tire Pressure
Monitoring System Warning Light will flash on
and off for 75 seconds and then remain on
solid. In addition, the instrument cluster display
will display a "SERVICE TPM SYSTEM" message
for five seconds and then display dashes (- -) in
place of the pressure value. For each subse-
quent ignition switch cycle, a chime will sound,
the Tire Pressure Monitoring System Warning
Light will flash on and off for 75 seconds and
then remain on solid, and the instrument
cluster display will display a "SERVICE TPM
SYSTEM" message for five seconds and then
display dashes (- -) in place of the pressure
value. Once you repair or replace the original
road tire, and reinstall it on the vehicle in place
of the spare tire, the TPMS will update automat-
ically.
In addition, the Tire Pressure Monitoring System
Warning Light will turn off and the graphic in the
instrument cluster display will display a new
pressure value instead of dashes (- -), as long as
no tire pressure is below the low-pressure
warning limit in any of the four active road tires.
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.
TPMS Deactivation — If Equipped
The Tire Pressure Monitoring System (TPMS)
can be deactivated if replacing all four wheel
and tire assemblies (road tires) with wheel and
tire assemblies that do not have TPMS sensors,
such as when installing winter wheel and tire
assemblies on your vehicle.
To deactivate the TPMS, first, replace all four
wheel and tire assemblies (road tires) with tires
not equipped with TPMS sensors. Then, drive the
vehicle for 20 minutes above 15 mph (24 km/h).
The TPMS will chime, the TPMS Warning Light will
flash on and off for 75 seconds and then remain
on. The instrument cluster will display the
"SERVICE TPM SYSTEM" message and then
display dashes (--) in place of the pressure
values.
Beginning with the next ignition cycle, the TPMS
will no longer chime or display the "SERVICE
TPM SYSTEM" message in the instrument
cluster but dashes (--) will remain in place of the
pressure values.
To reactivate the TPMS, replace all four wheel
and tire assemblies (road tires) with tires
equipped with TPM sensors. Then, drive the
vehicle for up to 20 minutes above 15 mph
(24 km/h). The TPMS will chime, the TPMS
Warning Light will flash on and off for 75 seconds
and then turn off. The instrument cluster will
display the "SERVICE TPM SYSTEM" message
and then display pressure values in place of the
dashes. On the next ignition cycle the "SERVICE
TPM SYSTEM" message will no longer be
displayed as long as no system fault exists.