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(445,1)
北米Model "A2550BE-B" EDITED: 2019/ 1/ 16
replace all four tires.
! Winter (snow) tires
S11AV0103
Winter tires are best suited for driving on
snow-covered and icy roads. However
winter tires do not perform as well as
summer tires and all season tires on roads
other than snow-covered and icy roads.
& Tire pressure monitoring
system (TPMS) (if equipped)
S11AV02
The tire pressure monitoring system pro-
vides the driver with a warning message by
sending a signal from a sensor that is
installed in each wheel when tire pressure
is severely low. The tire pressure monitor-
ing system will activate only when the
vehicle is driven. Also, this system may not
react immediately to a sudden drop in tire
pressure (for example, a blow-out caused
by running over a sharp object).
If you adjust the tire pressures in a warm
garage and will then drive the vehicle in
cold outside air, the resulting drop in tire
pressures may cause the low tire pressure
warning light to illuminate. To avoid this
problem when adjusting the tire pressures
in a warm garage, inflate the tires to
pressures higher than those shown on
the tire placard. Specifically, inflate them
by an extra 1 psi (6.9 kPa, 0.07 kgf/cm
2
) for
every difference of 108F (5.68C) between
the temperature in the garage and the
temperature outside. By way of example,
the following table shows the required tire
pressures that correspond to various out-
side temperatures when the temperature
in the garage is 608F (15.68C).
Example:
Tire size: 225/55R17 97V, 225/50R18 95H
Standard tire pressures:
Front: 33 psi (230 kPa, 2.3 kgf/cm
2
)
Rear: 32 psi (220 kPa, 2.2 kgf/cm
2
)
Garage temperature: 608F (15.68C)
Outside
temperature
Adjusted pressure
[psi (kPa, kgf/cm
2
)]
Front
Rear
308F (−18C)
36 (250, 2.5) 35 (240, 2.4)
108F (−128C)
38 (265, 2.65) 37 (255, 2.55)
−108F (−238C) 41 (280, 2.8)
39 (270, 2.7)
Example:
Tire size: 225/65R17 102H, 225/60R18
100H
Standard tire pressures:
Front: 35 psi (240 kPa, 2.4 kgf/cm
2
)
Rear: 33 psi (230 kPa, 2.3 kgf/cm
2
)
Garage temperature: 608F (15.68C)
Outside
temperature
Adjusted pressure
[psi (kPa, kgf/cm
2
)]
Front
Rear
308F (−18C)
38 (260, 2.65) 36 (250, 2.5)
108F (−128C)
40 (275, 2.8) 38 (265, 2.65)
−108F (−238C) 42 (290, 2.95)
41 (280, 2.8)
If the low tire pressure warning light
illuminates when you drive the vehicle in
cold outside air after adjusting the tire
pressures in a warm garage, re-adjust the
tire pressures using the method described
above. Then, increase the vehicle speed
to at least 20 mph (32 km/h) and check to
see that the low tire pressure warning light
goes off a few minutes later. If the low tire
pressure warning light does not go off, the
tire pressure monitoring system may not
be functioning normally. In this event, go to
a SUBARU dealer to have the system
inspected as soon as possible.
While the vehicle is driven, friction be-
tween tires and the road surface causes
the tires to warm up. After illumination of
the low tire pressure warning light, any
increase in the tire pressures caused by an
increase in the outside air temperature or
by an increase in the temperature in the
tires can cause the low tire pressure
warning light to go off.
– CONTINUED –
Maintenance and service/Tires and wheels
11-23
11
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