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If the ignition switch 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,
the ⬙SERVICE TPM SYSTEM⬙ message will not be present,
and a pressure value will be displayed instead of dashes. A
system fault can occur by any of the following:
• Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the
TPM 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 TPM sensors.
NOTE:
• If your vehicle is equipped with a matching full-size
spare wheel and tire assembly, it has a tire pressure
monitoring sensor, and can be monitored by the Tire
Pressure Monitoring System (TPMS) when swapped
with a low pressure road tire. 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, an ⬙Inflate to XX⬙ message to appear in the
instrument cluster, and the graphic display will still
show the low tire pressure value highlighted or shown
in a different color. Driving the vehicle for up to 20
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.
• If your vehicle is not equipped with a matching full-size
spare wheel and tire assembly, it does not have a tire
pressure monitoring sensor in the spare tire. The TPMS
will not be able to monitor the tire pressure. If you install
the spare tire in place of a road tire that has a pressure
below the low-pressure warning limit, upon the next
ignition switch cycle, the TPMS Warning Light will
remain ON, a chime will sound, and the instrument
cluster will still display a highlighted or different color
pressure value in the graphic display. 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 addition, the
instrument cluster will display a “SERVICE TPM SYS-
TEM⬙ message for a minimum of five seconds and then
display dashes (- -) in place of the pressure value. For
224 SAFETY
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