5
When trouble arises
541
5-2. Steps to take in an emergency
n If the tire pressure warning system is not functioning
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
l If tires not equipped with tire pressure warning valves and transmitters are used
l If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
l If the tire pressure warning select switch is set to a different tire setting.
l If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm
2
or bar) or higher
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
l 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 there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings
l If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
l If tire chains are used
l If the full-size spare tire is in a location subject to poor radio wave signal recep-
tion.
l If a large metallic object which can interfere with signal reception is put in the
luggage compartment (vehicles with full-size spare tire).
n If the tire pressure warning light comes on after flashing frequently for 1 minute
If the tire pressure warning light comes on after flashing frequently for 1 minute
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.
n Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features →P. 62 1)
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