Jeep Wrangler 2020 Owner's Manual page 265

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 facil-
ities 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. In addi-
tion, the instrument cluster will display a "Service Tire
Pressure System" message for five seconds and then
display dashes (--) in place of the pressure value.
4. For each subsequent ignition cycle, a chime will sound,
the TPMS Warning Light will flash on and off for 75
seconds and then remain on solid, and the instrument
cluster will display a "SERVICE TIRE PRESSURE
SYSTEM" message for five seconds and then display
dashes (--) in place of the pressure value.
5. Once you repair or replace the original road tire and rein-
stall it on the vehicle in place of the compact spare or
non-matching full size, the TPMS will update automati-
cally. In addition, the TPMS Warning Light will turn off
and the graphic in the instrument cluster 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.
SAFETY 263
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