Jeep 2013 Wrangler Owner's Manual page 249

3. Tire Pressure Monitoring Telltale Light
A tire pressure monitoring sensor is located in
the spare wheel if the vehicle is equipped with a
matching full size spare wheel and tire assem-
bly. The matching full size spare tire can be
used in place of any of the four road tires. A low
spare tire will not cause the "Tire Pressure
Monitoring Telltale Light" to illuminate or the
chime to sound.
The "Tire Pressure Monitoring Telltale
Light" will illuminate in the instrument
cluster, a "LOW TIRE" message will be
displayed for a minimum of five seconds an
"Inflate to XX" message will be displayed and an
audible chime will be activated when one or
more of the four active road tire pressures are
low. Should this occur, you should stop as soon
as possible, check the inflation pressure of each
tire on your vehicle, and inflate each tire to the
vehicle's recommended cold placard pressure
value shown in the "Inflate to XX" message. The
system will automatically update and the "Tire
Pressure Monitoring Telltale Light" and "LOW
TIRE" message will extinguish once the up-
dated tire pressures have been received. The
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vehicle may need to be driven for up to 20
minutes above 15 mph (24 km/h) to receive this
information.
The "Tire Pressure Monitoring Telltale Light" will
flash on and off for 75 seconds, and will remain
on solid when a system fault is detected. The
system fault will also sound a chime. If the
ignition key is cycled, this sequence will repeat,
providing the system fault still exists. A system
fault can occur by any of the following sce-
narios:
1. Jamming due to electronic devices or driving
next to facilities emitting the same Radio Fre-
quencies as the TPM sensors.
2. Installing some form of aftermarket window
tinting that affects radio wave signals.
3. Lots of snow or ice around the wheels or
wheel housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM
sensors.
NOTE:
• If your vehicle is equipped with a match-
ing full size spare wheel and tire assem-
bly, it has a tire pressure monitoring sen-
sor, and can be monitored by the Tire
Pressure Monitoring System (TPMS). In
the event that the matching full size spare
tire is swapped with a low pressure road
tire, the next ignition key cycle will still
show the "Tire Pressure Monitoring Tell-
tale Light" to be ON, a "LOW TIRE" mes-
sage displayed for a minimum of five
seconds, the Inflate to XX message dis-
played and a chime to sound. Driving the
vehicle for up to 20 minutes above 15 mph
(24 km/h) will turn OFF the "Tire Pressure
Monitoring Telltale Light" and "LOW
TIRE" message as long as none of the
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
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