Lexus GS 350 Owner's Manual page 523

522
7-2. Steps to take in an emergency
When the tire pressure warning light comes on
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Except for Hong Kong, Thailand, Chile

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.
For Hong Kong, Thailand, Chile

Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light.
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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Vehicles with compact spare tire: The compact spare tire is not equipped with a tire pres-
sure warning valve and transmitter. 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.
Vehicles with full-size spare tire: The spare tire is also equipped with a tire pressure warn-
ing valve and transmitter. The tire pressure warning light will turn on if the tire inflation
pressure of the spare tire is low. 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. 478
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
engine switch is turned to IGNITION ON mode, have it checked by your Lexus dealer.
Warning buzzer
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In some cases, the buzzer may not be heard because of noisy place or an audio sound.
GS350_300_GS F_OM_OM30J17E_(GE)