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326
6-3. Do-it-yourself maintenance
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.
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 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,
RC350-RC300_OM_General_OM24884E
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
Vehicles with the tire inflation pressure dis-
play function: If tire position information is
not correctly displayed due to the radio
wave conditions, the display may be cor-
rected 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 rap-
●
idly for example when a tire has burst, the
warning may not function.
Warning performance of the tire pres-
■
sure warning system (on some models)
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.
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