5
When trouble arises
653
5-2. Steps to take in an emergency
LX570_U (OM60D99U)
■ If the tire pressure warning system is inoperative
The tire pressure warning system will become inoperative in the following condi-
tions: (When the condition becomes normal, the system will work properly.)
● If tires not equipped with tire pressure warning valves and transmitters are used.
● If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer.
● If the tire inflation pressure is more than 73 psi (500 kPa, 5.1 kgf/cm
2
or bar).
The tire pressure warning system may become inoperative in the following condi-
tions: (When the condition becomes normal, the system will work properly.)
● If electronic devices or facilities using similar radio wave frequencies are nearby.
● If a radio set at similar frequencies is in use in the vehicle.
● If a window tint that affects the radio wave signals is installed.
● If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
● 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.)
● If tire chains are used.
● 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
luggage compartment.
■ If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking 1 minute frequently when
the “ENGINE START STOP” switch is turned to IGNITION ON mode, have it
checked by Lexus dealer.
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