Chrysler Pacifica Owner's Manual page 318

318 STARTING AND OPERATING
NOTE: The vehicle may need to be driven for up to 10
minutes above 15 mph (25 km/h) to receive this infor-
mation.
The TPMS Telltale Lamp will flash on and off for 75
seconds, and 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, provid-
ing the system fault still exists. The TPMS Telltale Lamp
will turn off when the fault condition no longer exists. A
system fault can occur with any of the following sce-
narios:
1. Jamming due to electronic devices or driving next to
facilities emitting the same radio frequencies as the TPMS
sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.
3. Accumulation of excessive snow and/or ice around
the wheels or wheel housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPMS sensors.
NOTE: Your vehicle is equipped with a compact spare
wheel and tire assembly that does not have a tire pressure
monitoring sensor. Therefore, it will not be monitored by
the TPMS. In the event that the compact spare tire is
swapped with a low pressure road tire, each ignition key
cycle will still show the TPMS Lamp to be ON, and a
chime to sound. Once you repair or replace the original
road tire and reinstall it on the vehicle in place of the
compact spare tire, the TPMS will update automatically,
and the TPMS Lamp will turn OFF 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 10 minutes above 15 mph (25 km/h) for
the TPMS to receive this information.