Tire Pressure Monitoring System (Tpms) - Jeep Grand Cherokee 2020 Owner's Manual

138 SAFETY
NOTE:
Changing the FCW status to "Only Warning"

prevents the system from providing limited
active braking, or additional brake support if
the driver is not braking adequately in the
event of a potential frontal collision, but
maintains the audible and visual warnings.
Changing the FCW status to "Off" prevents

the system from providing autonomous
braking, or additional brake support if the
driver is not braking adequately in the event
of a potential frontal collision.
The system will retain the last setting

selected by the driver after ignition shut
down.
FCW may not react to irrelevant objects such

as overhead objects, ground reflections,
objects not in the path of the vehicle,
stationary objects that are far away,
oncoming traffic, or leading vehicles with the
same or higher rate of speed.
FCW will be disabled like ACC, with the

unavailable screens.
FCW Limited Warning
If the instrument cluster displays "ACC/FCW
Limited Functionality" or "ACC/FCW Limited
Functionality Clean Front Windshield"
momentarily, there may be a condition that
limits FCW functionality. Although the vehicle is
still drivable under normal conditions, the active
braking may not be fully available. Once the
condition that limited the system performance
is no longer present, the system will return to its
full performance state. If the problem persists,
see an authorized dealer.
Service FCW Warning
If the system turns off, and the instrument
cluster displays:
ACC/FCW Unavailable Service Required

Cruise/FCW Unavailable Service Required

This indicates there is an internal system fault.
Although the vehicle is still drivable under
normal conditions, have the system checked by
an authorized dealer.

Tire Pressure Monitoring System (TPMS)

NOTE:
For vehicles equipped with run flat tires, when
the TPMS indicates a tire pressure of 14 psi
(96 kPa) or lower, always check tire pressure
and replace the tire at the first opportunity. At
inflation pressure of or below 14 psi (96 kPa)
the tire is in the run-flat mode of operation. In
this condition, it is recommended a vehicle
maximum speed of 50 mph (80 km/h) for a
maximum distance of 50 miles (80 km). The
manufacturer does not recommend using the
run flat feature while driving a vehicle loaded at
full capacity or towing a trailer.
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure based
on the vehicle recommended cold tire pressure.
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
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.