Jeep WRANGLER 2020 Owner's Manual page 169

Tire Pressure Monitoring Low Pressure Warning
Should this occur, you should stop as soon as
possible and inflate the tires with low pressure
(those in a different color in the instrument
cluster graphic) to the vehicle's recommended
cold placard pressure value as shown in the
"Inflate to XX" message. Once the 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
20 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 housings
Using tire chains on the vehicle

Using wheels/tires not equipped with TPMS

sensors
Vehicles With Compact Spare or Non-Matching
Full Size Spare
1. The compact spare tire or non-matching
full size does not have a Tire Pressure
Monitoring sensor. Therefore, the TPMS
will not monitor the pressure in the
compact spare tire.
2. If you install the compact or non-matching
full size spare tire in place of a road tire that
has a pressure below the low-pressure
warning limit, upon the next ignition cycle,
the TPMS Warning Light will remain on and
a chime will sound. In addition, the graphic
in the instrument cluster will still display a
different color pressure value and an
"Inflate to XX" message.
3. After driving the vehicle for up to
20 minutes above 15 mph (24 km/h), the
TPMS Warning Light will flash on and off for
75 seconds and then remain on solid.
SAFETY 167
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