Toyota SIENNA 2022 Manual page 426

426
6-3. Do-it-yourself maintenance
large display, airport or other facil-
ity that generates strong radio
waves or electrical noise
• When carrying a portable radio,
cellular phone, cordless phone or
other wireless communication
device
If tire position information is not cor-
rectly displayed due to the radio
wave conditions, the display may be
corrected by driving and changing
the radio wave conditions.
● When the vehicle is parked, the
time taken for the warning to start
or go off could be extended.
● When tire inflation pressure
declines rapidly for example when
a tire has burst, the warning may
not function.
■ Warning performance of the tire
pressure warning system
The warning of the tire pressure
warning system will change in
accordance with the conditions
under which it was initialized. For
this reason, the system may give a
warning even if the tire pressure
does not reach a low enough level,
or if the pressure is higher than the
pressure that was adjusted to when
the system was initialized.
Installing tire pressure
warning valves and trans-
mitters
When replacing tires or wheels,
tire pressure warning valves and
transmitters must also be
installed.
When new tire pressure warning
valves and transmitters are
installed, new ID codes must be
registered in the tire pressure
warning computer and the tire
pressure warning system must
be initialized. (P.430)
■ When replacing the tires and
wheels
If the ID code of the tire pressure
warning valve and transmitter is not
registered, the tire pressure warning
system will not work properly. After
driving for about 20 minutes, the tire
pressure warning light blinks for 1
minute and stays on to indicate a
system malfunction.
NOTICE
■ Repairing or replacing tires,
wheels, tire pressure warn-
ing valves, transmitters and
tire valve caps
● When removing or fitting the
wheels, tires or the tire pressure
warning valves and transmit-
ters, contact your Toyota dealer
as the tire pressure warning
valves and transmitters may be
damaged if not handled cor-
rectly.
● Make sure to install the tire
valve caps. If the tire valve caps
are not installed, water could
enter the tire pressure warning
valves and the tire pressure
warning valves could be bound.
● When replacing tire valve caps,
do not use tire valve caps other
than those specified.
The cap may become stuck.