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416
7-3. Do-it-yourself maintenance
COROLLA HV_U
low tire inflation pressure before
serious problems arise.
If the tire pressure drops below
a predetermined level, the driver
is warned by a warning light.
(P.454)
■
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 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 tires not equipped with tire pres-
sure warning valves and transmit-
ters 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,
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.
●
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 driving conditions.
For this reason, the system may
give a warning even if the tire pres-
sure 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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