Lexus 2007 GS430 Quick Manual page 532

If the tire pressure warning system is inoperative
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The system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
If tires not equipped with tire pressure warning valves and transmitters are used.
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If the ID code on the tire pressure warning valves and transmitters is not regis-
l
tered in the tire pressure warning computer.
If the tire inflation pressure is more than 73 psi (500 kPa, 5.1 kgf/cm
l
The system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
If electronic devices or facilities using similar radio wave frequencies are nearby.
l
If a radio set at similar frequencies is in use in the vehicle.
l
If a window tint that affects the radio wave signals is installed.
l
If the tire pressure warning select switch is set to a different tire setting.
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If there is a lot of snow or ice on the vehicle, in particular around the wheels or
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wheel housings.
If non-genuine Lexus wheels are used.
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If tire chains are used.
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If the tire pressure warning light comes on after blinking for 1 minute frequently
n
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the engine switch is turned to "IG-ON" mode, have it checked by your Lexus
dealer.
NOTICE
Precaution when installing a different tire
n
When a tire of a different specification or maker is installed, the tire pressure warn-
ing system may not operate properly.
5-2. Steps to take in an emergency
I n f o r ma t i o n P r o v i d e d b y :
2
or bar).
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