Lexus UX 250h 2020 Owner's Manual page 350

348
6-3. Do-it-yourself maintenance
Run-flat tires
■
The run-flat tires are for only this vehicle.
●
Do not use the tires on other vehicles.
● Do not mix run-flat tires and normal tires.
If non-genuine Lexus wheels are used, it
●
may be impossible to sufficiently demon-
strate the performance of run-flat tires.
Tire pressure warning system
Your vehicle is equipped with a tire
pressure warning system that uses tire
pressure warning valves and transmit-
ters to detect low tire inflation pressure
before serious problems arise.
 If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. (P.387, 395)
 The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display. (P.87)
The illustration used is intended as an
example, and may differ from the image
that is actually displayed on the multi-infor-
mation display.
■ Routine tire inflation pressure checks
The tire pressure warning system does not
replace routine tire inflation pressure
checks. Make sure to check tire inflation
pressure as part of your routine of daily
vehicle checks.
Tire inflation pressure
■
● It may take a few minutes to display the
tire inflation pressure after the power
switch is turned to ON. It may also take a
few minutes to display the tire inflation
pressure after inflation pressure has been
adjusted.
● Tire inflation pressure changes with tem-
perature. The displayed values may also
be different from the values measured
using a tire pressure gauge.
Situations in which the tire pressure
■
warning system may not operate prop-
erly
● In the following cases, the tire pressure
warning system may not operate prop-
erly.
• If non-genuine Lexus 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 vehi-
cle, particularly around the wheels or
wheel housings.
• If the tire inflation pressure is extremely
higher than the specified level.
• If wheels without tire pressure warning
valves and transmitters are used.
• If the ID code on the tire pressure warn-
ing valves and transmitters is not regis-
tered in the tire pressure warning
computer.
Performance may be affected in the fol-
●
lowing situations.
• Near a TV tower, electric power plant,
gas station, radio station, large display,
airport or other facility 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 correctly
displayed due to the radio wave conditions,