Lexus IS250 2006 Owner's Manual page 359

If the tire pressure warning system is inoperative
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The tire pressure warning system may become inoperative in the following circum-
stances:
The vehicle' s wheels have not been equipped with tire pressure sensors.
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The sensor batteries are dead.
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If wireless frequencies the same as those used by the sensors are being used by
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other facilities or equipment in the vicinity of the vehicle.
If snow or ice has collected on or around the wheel or wheelhouse.
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If non-genuine wheels are used on the vehicle.
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When driving with tire chains.
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If wireless devices or other equipment that operate on similar frequencies to
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those used by the sensors are being used
If the select switch is used to select the wrong set of sensors (wheels)
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If the tire pressure was not set to the specified level when the system was initial-
●
ized
NOTICE
Precaution when installing a different tire
■
When a tire of a different specification or maker is installed, the tire pressure warn-
ing system may not operate properly.
5-2. Steps to take in an emergency
5
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