Toyota SIENNA 2022 Manual page 425

"TPWS Setting", and then
press "OK".
6
Press or
"Setting UNIT".
7
Press or
desired unit and then press
"OK".
With 7-inch display

1
Park the vehicle in a safe
place and turn the power
switch off.
Changing the unit cannot be per-
formed while the vehicle is moving.
2
Turn the power switch to ON.
3
Press or
control switches on the steer-
ing wheel and select
4
Press or
control switches and select
, and then press and hold
"OK".
5
Press or
control switches and select
"TPWS Setting", and then
press "OK".
6
Press or
"Setting UNIT".
7
Press or
desired unit and then press
"OK".
■ Routine tire inflation pressure
checks
The tire pressure warning system
does not replace routine tire inflation
pressure checks. Make sure to
6-3. Do-it-yourself maintenance
to select
to select the
of the meter
.
of the meter
of the meter
to select
to select the
check tire inflation pressure as part
of your routine of daily vehicle
checks.
■ Tire inflation pressure
● It may take a few minutes to dis-
play the tire inflation pressure
after the power switch is turned to
ON. It may also take a few min-
utes to display the tire inflation
pressure after inflation pressure
has been adjusted.
● Tire inflation pressure changes
with temperature.
The displayed values may also be
different from the values mea-
sured using a tire pressure gauge.
■ Situations in which the tire
pressure warning system may
not operate properly
● In the following cases, the tire
pressure warning system may not
operate properly.
• If non-genuine Toyota wheels are
used.
• A tire has been replaced with a
tire that is not an OE (Original
Equipment) tire.
• A tire has been replaced with a
tire that is not of the specified size.
• Tire chains, etc. are equipped.
• An auxiliary-supported run-flat tire
is equipped.
• If a window tint that affects the
radio wave signals is installed.
• If there is a lot of snow or ice on
the vehicle, particularly around the
wheels or wheel housings.
• If the tire inflation pressure is
extremely higher than the speci-
fied level.
• If wheel without tire pressure
warning valves and transmitters
are used.
• If the ID code on the tire pressure
warning valves and transmitters is
not registered in the tire pressure
warning computer.
● Performance may be affected in
the following situations.
• Near a TV tower, electric power
plant, gas station, radio station,
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