Low Tire Pressure Warning Message - Lexus 2004 LS430 Owner's Manual

STARTING AND DRIVING

Low tire pressure warning message

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When the low tire inflation pressure is detected while
driving, the master warning light comes on, the above
message appears and a warning tone sounds.
If the above message appears and adjust the tire inflation
pressure to the specified level as soon as possible. Push the
tire pressure warning system reset switch for a few seconds
and make sure the warning message goes off. If the message
still remains on, have your vehicle checked by your Lexus
dealer as soon as possible.
The tire pressure warning system does not function
properly under certain circumstances. In the following
cases, the low tire pressure warning may not turn on even
if the tire inflation pressure is low, or it may turn on when
the tire inflation pressure is actually normal.
D A compact spare tire, snow tires, or tire chains are used.
D The tire inflation pressure is excessively higher than
specified, or tire inflation pressure suddenly drops due to
bursting or other causes.
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D You are driving on slippery road surfaces such as rough or
frozen roads.
D You are driving under 30 km/h (19 mph) or above 100 km/h
(62 mph) for less than 5 minutes.
D The tires differ in tread pattern or manufacturer.
D The tires are not the specified size.
D The degree of the tread wear is very different among the
installed tires.
D Rapid acceleration/deceleration or sharp turns are
continued.
D Towing a trailer.
D The loading is over the limit or unbalanced.
D Initialization was not performed correctly after replacing or
rotating tires or wheels.
D The outside temperature is below 0_C (32_F) or above
40_C (104_F).
If the warning message appears again on the
multi-information display after adjusting tire inflation pressure,
the system may be malfunctioning. Have your vehicle
checked by your Lexus dealer as soon as possible.