Tire Pressure Monitoring System (Tpms) - Jeep Compass 2015 Operating Information Manual

Tire Rotation
TIRE PRESSURE MONITORING
SYSTEM (TPMS)
The Tire Pressure Monitor System (TPMS) will
warn the driver of a low tire pressure based on
the vehicle recommended
pressure.
The tire pressure will vary with temperature by
about 1 psi (7.0 kPa) for every 12°F (6.5°C).
This means that when the outside temperature
decreases, the tire pressure will decrease. Tire
pressure should always be set based on "cold
inflation tire pressure". This is defined as the tire
pressure after the vehicle has not been driven
for at least three hours, or driven less than 1
mile (1.6 km) after a three hour period. The cold
tire inflation pressure must not exceed the maxi-
mum inflation pressure molded into the tire
sidewall. Refer to "Tires – General Information"
in "Starting and Operating" for information on
how to properly inflate the vehicle's tires. The
tire pressure will also increase as the vehicle is
driven - this is normal and there should be no
adjustment for this increased pressure.
The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the
low-pressure warning limit for any reason, in-
cluding low temperature effects, or natural pres-
sure loss through the tire.
The TPMS will continue to warn the driver of low
tire pressure as long as the condition exists,
cold placard
and will not turn off until the tire pressure is at or
above the recommended cold placard pressure.
Once the low tire pressure warning (Tire Pres-
sure Monitoring Telltale Light) illuminates, you
must increase the tire pressure to the recom-
mended cold placard pressure in order for the
Tire Pressure Monitoring Telltale Light to turn
off. The system will automatically update and
the Tire Pressure Monitoring Telltale Light will
turn off once the system receives the updated
tire pressures. 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.
For example, your vehicle may have a recom-
mended cold (parked for more than three hours)
placard pressure of 30 psi (207 kPa). If the
ambient temperature is 68°F (20°C) and the
measured tire pressure is 27 psi (186 kPa), a
temperature drop to 20°F (-7°C) will decrease
the tire pressure to approximately 23 psi (158
kPa). This tire pressure is sufficiently low
enough to turn ON the Tire Pressure Monitoring
Telltale Light. Driving the vehicle may cause the
tire pressure to rise to approximately 27 psi (186
kPa), but the Tire Pressure Monitoring Telltale
Light will still be ON. In this situation, the Tire
Pressure Monitoring Telltale Light will turn OFF
only after the tires are inflated to the vehicle's
recommended cold placard pressure value.
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