Jeep Wrangler Owner's Manual page 170

system receives the updated tire pressures, the system
will automatically update. The pressure values in the
graphic display in the instrument cluster will return to their
original color and the TPMS Warning Light will turn off.
NOTE:
When filling warm tires, the tire pressure may need to be
increased up to an additional 4 psi (28 kPa) above the
recommended cold placard pressure in order to turn the
TPMS Warning Light off.
The vehicle may need to be driven for up to 10 minutes
above 15 mph (24 km/h) in order for the TPMS to receive
this information.
SERVICE TPMS WARNING
When a system fault is detected, the TPMS Warning Light
will flash on and off for 75 seconds and then remain on
solid. The system fault will also sound a chime. In addition,
the instrument cluster will display a "SERVICE TIRE
PRESSURE SYSTEM" message for a minimum of five
seconds and then display dashes (--) in place of the
pressure value to indicate which sensor is not being
received.
If the ignition is cycled, this sequence will repeat, providing
the system fault still exists. If the system fault no longer
exists, the TPMS Warning Light will no longer flash, and
the "SERVICE TIRE PRESSURE SYSTEM" message will no
longer display, and a pressure value will display in place of
the dashes. A system fault can occur due to any of the
following:
 Jamming due to electronic devices or driving next to
facilities emitting the same radio frequencies as the
TPMS sensors
 Installing some form of aftermarket window tinting that
affects radio wave signals
 Lots of snow or ice around the wheels or wheel hous-
ings
 Using tire chains on the vehicle
 Using wheels/tires not equipped with TPMS sensors
Vehicles With A Full-Size Matching Spare
1. If your vehicle is equipped with a matching full-size
spare wheel and tire assembly, it has a Tire Pressure
Monitoring System sensor, and can be monitored by
the Tire Pressure Monitoring System (TPMS) when
swapped with a low pressure road tire.
2. In the event that the matching full-size spare tire is
swapped with a low pressure road tire, the next
ignition switch cycle will still show the TPMS Warning
Light to be on, a chime to sound, and the graphic
display will still show the low tire pressure value in a
different color.
3. Driving the vehicle for up to 10 minutes above
15 mph (24 km/h) will turn off the TPMS Warning
Light as long as none of road tires are below the low
pressure warning threshold.
TIRE FILL ALERT
This feature notifies the user when the placard tire
pressure is attained while inflating or deflating the tire.
The customer may choose to disable or enable the Tire Fill
Alert feature in the apps menu of the Uconnect system.
NOTE:
 When using TFA assist to adjust the inflation pressure
of multiple wheels, the system has a delay period of
approximately 30 seconds when switching from one
wheel to another wheel.
 The Tire Fill Alert feature cannot be entered if an
existing TPMS fault is set to "active" or if the system is
in deactivation mode (if equipped).
The system will be activated when the system detects an
increase in tire pressure while filling the tire. The ignition
must be in the ON/RUN mode with the transmission in
PARK for vehicles equipped with an automatic
transmission. For vehicles equipped with a manual
transmission, the parking brake must be applied.
NOTE:
It is not required to have the engine running to enter Tire
Fill Alert mode.
SAFETY 169