Lexus IS350 AWD Owner's Manual page 529

Electric power steering system warning light (warning buzzer)
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When the battery charge becomes insufficient or the voltage temporarily drops, the
electric power steering system warning light may come on and the warning buzzer may
sound.
When the tire pressure warning light comes on
■
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 the 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. 490
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
■
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
WARNING
If both the ABS and the brake system warning lights remain on
■
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehi-
cle will become extremely unstable during braking, and the ABS system may fail, which
could cause an accident resulting in death or serious injury.
When the electric power steering system warning light comes on
■
The steering wheel may become extremely heavy.
When steering wheel operations are heavier than usual, grip the steering wheel firmly
and operate it using more force than usual.
If the tire pressure warning light comes on
■
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
●
immediately.
If the tire pressure warning light comes on even after tire inflation pressure adjust-
●
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
●
control of the steering wheel or the brakes.
If a blowout or sudden air leakage should occur
■
The tire pressure warning system may not activate immediately.
IS350 AWD/IS350/IS300 AWD/IS300_U
8-2. Steps to take in an emergency
529
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