Toyota Avanza Owner's Manual page 314

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8-2. Steps to take in an emergency
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
If electronic devices or facilities using similar radio wave frequencies are
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nearby
If a radio set at a similar frequency is in use in the vehicle
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If a window tint that affects the radio wave signals is installed
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If there is a lot of snow or ice on the vehicle, particularly around the wheels
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or wheel housings
If non-genuine Toyota wheels are used (Even if you use Toyota wheels, the
●
tire pressure warning system may not work properly with some types of
tires.)
If tire chains are used
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If the spare tire is in a location subject to poor radio wave signal reception.
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If a large metallic object which can interfere with signal reception is put in
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the luggage room.
If the tire pressure warning light frequently comes on after blinking for 1
■
minute (vehicles with a tire pressure warning system)
If the tire pressure warning light frequently comes on after blinking for 1 min-
ute when the engine switch is turned on, have it checked by your Toyota
dealer.
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