Jeep Compass, Owner'S Handbook Manual

Page: 93 / 322

91
TPMS (Tyre Pressure Monitoring
System)
107) 108) 109) 110) 111)
30)
The car is equipped with Tyre Pressure
Monitoring System (TPMS), which
can advise the driver in the event of
insufficient tyre pressure according to
the cold inflation pressure set by the
driver (see indications in the "Technical
Specifications" section, "Cold tyre
inflation pressure" table).
NOTE The system only warns the tyre
pressure is low. It is not able to inflate
them.
The inflation pressure varies, depending
on the temperature, of about 0.07 bar
every 6.5
°
C. This means that a decrease
of the external temperature corresponds
to a decrease of the tyre pressure. Always
adjust the tyre inflation pressure when
cold. This is defined as the tyre pressure
after at least 3 hours of car inactivity
or travel of less than 1.6 km after the 3
hour interval.
The cold tyre inflation pressure must not
exceed the maximum pressure indicated
on the shoulder of the tyre: for further
details see the instructions in the "Rims
and tyres" chapter, in the "Technical
Specifications" section.
The tyre pressure will also increase as
the car is driven. This is normal and no
adjustment of the pressure is required.
The TPMS will warn the driver of a low
tyre pressure if the tyre pressure falls
below the low-pressure warning limit for
any reason, including low temperature
effects and natural pressure loss through
the tyre. The TPMS will continue to warn
the driver of low tyre pressure as long
as the condition exists and will not turn
off until the tyre pressure is at or above
the recommended cold tyre inflation
pressure.
NOTE Therefore, if insufficient tyre
pressure is indicated (warning light
on instrument panel on), increase the
inflation pressure up to the prescribed
cold inflation value.
Once the system receives the updated
inflation pressures, the system will
automatically update and the warning
light will turn off. The car may need to
be driven for up to 10 minutes above
24 km/h in order for the TPMS to receive
this information.
For example, your car may have a
recommended cold (parked for more
than three hours) pressure of 2.2 bar
indicated on the tyre information
placard. If the ambient temperature is
20
°
C and the measured tyre pressure
is 1.9 bar, a temperature drop to
-7
°
C will decrease the tyre pressure
to approximately 1.65 kPa. This tyre
pressure is sufficiently low enough to
turn on the warning light . Driving the
car may cause the tyre pressure to rise
to approximately 1.9 bars, but the
warning light will still be on. In this
situation, the warning light will turn OFF
only after the tyres are inflated to the
cold inflation pressure value indicated on
the tyre information placard of the car.
NOTE When inflating warm tyres, the
tyre pressure may need to be increased
up to an additional 0.28 bar above the
cold tyre inflation pressure indicated on
the tyre information placard in order to
turn the warning light off.
31) 32) 33)
NOTES:
The TPMS is not intended to replace
normal tyre care and maintenance, nor
to provide warning of a tyre failure or
condition.
The TPMS should not be used as a
tyre pressure gauge while adjusting your
tyre pressure.
Driving on a significantly under-
inflated tyre causes the tyre to overheat
and can lead to tyre failure. Under-
inflation also reduces fuel efficiency
and tyre tread life and may affect the
handling and stopping ability of the car.
The TPMS is not a substitute for
proper tyre maintenance and it is the
driver’s responsibility to maintain correct
tyre pressure using an accurate tyre
pressure gauge, even if under-inflation
has not reached the level to turn on the
warning light.