Occupant Restraint Systems; Occupant Restraint Systems Features - Jeep Grand Cherokee 2020 Owner's Manual

142 SAFETY
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
automatically.
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 Tire Pressure Monitoring
(TPM) 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.

OCCUPANT RESTRAINT SYSTEMS

Some of the most important safety features in
your vehicle are the restraint systems:

Occupant Restraint Systems Features

Seat Belt Systems

Supplemental Restraint Systems (SRS) Air

Bags
Supplemental Active Head Restraints

Child Restraints

Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on
others. If you are not sure, ask an authorized
dealer.