2010 Lexus LX 570 Owners Manual - Page 719

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5-2. Steps to take in an emergency

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When a tire is replaced with a spare tire

The spare tire is also equipped with the tire pressure warning valve and transmitter.

The tire pressure warning light will turn on if the tire inflation pressure of the spare

tire is low. If a tire goes flat, even though the flat tire is replaced with the spare tire,

the tire pressure warning light does not turn off. Replace the spare tire with the

repaired tire and adjust the proper tire inflation pressure. The tire pressure warning

light will turn off after a few minutes.

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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 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.)

●

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.

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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.