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285
6-1. MOBILITY
Supra Owner's Manual
6
MOBILITY
The tire inflation pressure
depends on the tire's tempera-
ture.
Driving or exposure to the sun
will increase the tire's tempera-
ture, thus increasing the tire
inflation pressure.
The tire inflation pressure is
reduced when the tire tempera-
ture falls again.
These circumstances may
cause a warning when tempera-
tures fall very sharply.
Following a temperature-related
warning, the target pressures
are displayed on the Control
Display again after a short dis-
tance.
The system cannot indicate sud-
den serious tire damage caused
by external circumstances.
Tires with special approval: the
system will not function correctly
if a reset was not performed, for
example a flat tire may be indi-
cated although the tire inflation
pressures are correct.
• A wheel without TPM wheel
electronics, such as an emer-
gency wheel, is mounted:
have the wheels checked, if
needed.
• Malfunction: have the system
checked.
• Interference caused by sys-
tems or devices with the
same radio frequency: after
leaving the area of the inter-
ference, the system automati-
cally becomes active again.
• For tires with special
approval: the system was
unable to complete the reset.
Perform a system reset again.
• Each tire, including the spare
(if provided) should be
checked monthly when cold
and inflated to the inflation
System limits
Temperature
Sudden tire pressure loss
Failure to perform a reset
Malfunction
Message
The yellow warning
light flashes and is then
illuminated continu-
ously. A vehicle mes-
sage is displayed. It
may not be possible to
identify tire pressure
losses.
Measure
Declaration according to
NHTSA/FMVSS 138 Tire
Pressure Monitoring System
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