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Center display
When "Adjust Pressure" is dis-
played (Normal Warning)
A warning with the tire pressure warning
light and warning buzzer when there is an
unknown level of low tire pressure with the
appearance of the tire due to natural air
leakage as well as the pressure lowering
due to changes in the pressure according
to the outside temperature.
When "Immediately Check tire
when Safe" is displayed (Emergency
Warning)
A warning with the tire pressure warning
light and warning buzzer when there is a
known level of low tire pressure with the
appearance of the tire due to pressure sud-
denly lowering.
However, the system may not be able to
detect sudden tire ruptures (bursting, etc.).
The tire pressure detected by the
tire pressure warning system can be
displayed on the center display.
(P.255)
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.
8-5. Tire maintenance
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 pres-
sure 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.
• 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 tires not equipped with 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,
the display may be corrected by changing
the location of the vehicle as the radio
wave conditions may change.
447
8
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