Lexus GS 350 Owner's Manual page 479

478
6-3. Do-it-yourself maintenance
Low profile tires (except 225/50R17 tires)
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Generally, low profile tires will wear more rapidly and tire grip performance will be
reduced on snowy and/or icy roads when compared to standard tires. Be sure to use
snow tires or tire chains on snowy and/or icy roads and drive carefully at a speed appro-
priate for road and weather conditions. (P. 359)
If the tread on snow tires wears down below 4 mm (0.16 in.)
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The effectiveness of the tires as snow tires is lost.
Situations in which the tire pressure warning system may not operate properly (vehi-
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cles with the tire pressure warning system)
In the following cases, the tire pressure warning system may not operate properly.
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• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If the spare tire is in a location subject to poor radio wave signal reception.
• If a large metallic object which can interfere with signal reception is put in the trunk.
• If wheel without the tire pressure warning valve and transmitter is used.
• If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.
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: GS350/GS300 with full-size spare tire only
Performance may be affected in the following situations.
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• Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility that generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
Vehicles with the tire inflation pressure display function: If tire position information is not
correctly displayed due to the radio wave conditions, the display may be corrected by
driving and changing the radio wave conditions.
When the vehicle is parked, the time taken for the warning to start or go off could be
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extended.
When tire inflation pressure declines rapidly for example when a tire has burst, the
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warning may not function.
GS350_300_GS F_OM_OM30J17E_(GE)
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