Loading ...
Loading ...
Loading ...
SAFETY 169
TIRE PRESSURE MONITORING SYSTEM
(TPMS)
The Tire Pressure Monitoring System
(TPMS) will warn the driver of a low tire
pressure based on the vehicle
recommended cold tire pressure.
The tire pressure will vary with
temperature by about 1 psi (7 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 maximum inflation
pressure molded into the tire sidewall. The tire pressure
will also increase as the vehicle is driven, this is normal
and there should be no adjustment for this increased
pressure.
See
Ú page 250 on how to properly inflate the
vehicle's tires.
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, including low temperature effects, or natural
pressure loss through the tire.
The TPMS will continue to warn the driver of low tire
pressure as long as the condition exists, and will not turn
off until the tire pressure is at or above the recommended
cold tire pressure on the placard. Once the low tire
pressure warning (Tire Pressure Monitoring System
Warning Light) illuminates, you must increase the tire
pressure to the recommended cold tire pressure in order
for the Tire Pressure Monitoring System Warning Light to
turn off. The system will automatically update and the Tire
Pressure Monitoring System Warning 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 recommended cold
(parked for more than three hours) tire 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 (159 kPa). This tire
pressure is sufficiently low enough to turn on the Tire
Pressure Monitoring System Warning Light. Driving the
vehicle may cause the tire pressure to rise to
approximately 27 psi (186 kPa), but the Tire Pressure
Monitoring System Warning Light will still be on. In this
situation, the Tire Pressure Monitoring System Warning
Light will turn off only after the tires are inflated to the
vehicle’s recommended cold tire pressure value
Ú page 277.
NOTE:
The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire failure
or condition.
The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
Driving on a significantly underinflated tire causes the
tire to overheat and can lead to tire failure. Underinfla-
tion also reduces fuel efficiency and tire tread life, and
may affect the vehicle’s handling and stopping ability.
CAUTION!
The TPMS has been optimized for the original equip-
ment tires and wheels. TPMS pressures and warnings
have been established for the tire size equipped on
your vehicle. Undesirable system operation or sensor
damage may result when using replacement equip-
ment that is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor damage. Using
aftermarket tire sealants may cause the Tire Pressure
Monitoring System (TPMS) sensor to become inoper-
able. After using an aftermarket tire sealant it is
recommended that you take your vehicle to an autho-
rized dealership to have your sensor function checked.
After inspecting or adjusting the tire pressure, always
reinstall the valve stem cap. This will prevent moisture
and dirt from entering the valve stem, which could
damage the Tire Pressure Monitoring System sensor.
6
23_FD_OM_EN_USC_t.book Page 169
Loading ...
Loading ...
Loading ...