Lexus GS450h Owner's Manual page 464

464
7-2. Steps to take in an emergency
When the tire pressure warning light comes on (if equipped)
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Carry out the following procedure after the tire temperature has lowered sufficiently.
Check the tire inflation pressure and adjust to the appropriate level.
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If the warning light does not go out even after several minutes, check that the tire infla-
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tion pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
The tire pressure warning light may come on due to natural causes
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The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
When a tire is replaced with a spare tire
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The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
Conditions that the tire pressure warning system may not function properly
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P. 420
If the tire pressure warning light frequently comes on after blinking for 1 minute
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If the tire pressure warning light frequently comes on after blinking for 1 minute when the
power switch is turned to ON mode, have it checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
Warning buzzer
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In some cases, the buzzer may not be heard because of noisy place or an audio sound.
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