Brake Override System- Page 337

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7-2. Steps to take in an emergency

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WARNING

●

Check and adjust the tire inflation 

pressure immediately.

●

If the tire pressure warning light comes 

on even after tire inflation pressure 

adjustment, it is probable that you have 

a flat tire. Check the tires. If a tire is flat, 

change it with the spare tire and have 

the flat tire repaired by the nearest 

Lexus dealer.

●

Avoid abrupt maneuvering and brak-

ing.

If the vehicle tires deteriorate, you 

could lose control of the steering 

wheel or the brakes.

■

If a blowout or sudden air leakage 

should occur

The tire pressure warning system may 

not activate immediately.

■

Maintenance of the tires

Each tire, including the spare (if pro-

vided), should be checked monthly when 

cold and inflated to the inflation pressure 

recommended by the vehicle manufac-

turer on the vehicle placard or tire infla-

tion pressure label (tire and load 

information label). (If your vehicle has 

tires of a different size than the size indi-

cated on the vehicle placard or tire infla-

tion pressure label [tire and load 

information label], you should determine 

the proper tire inflation pressure for 

those tires.)

As an added safety feature, your vehicle 

has been equipped with a tire pressure 

monitoring system (TPMS-tire pressure 

warning system) that illuminates a low 

tire pressure telltale (tire pressure warn-

ing light) when one or more of your tires 

is significantly under-inflated. Accord-

ingly, when the low tire pressure telltale 

(tire pressure warning light) illuminates, 

you should stop and check your tires as 

soon as possible, and inflate them to the 

proper pressure. Driving on a signifi-

cantly under-inflated tire causes the tire 

to overheat and can lead to tire failure. 

Under-inflation also reduces fuel effi-

ciency and tire tread life, and may affect 

the vehicle’s handling and stopping abil-

ity.

Please note that the TPMS (tire pressure 

warning system) is not a substitute for 

proper tire maintenance, and it is the 

driver’s responsibility to maintain correct 

tire pressure, even if under-inflation has 

not reached the level to trigger illumina-

tion of the TPMS low tire pressure telltale 

(tire pressure warning light).

Your vehicle has also been equipped with 

a TPMS (tire pressure warning system) 

malfunction indicator to indicate when 

the system is not operating properly. The 

TPMS (tire pressure warning system) 

malfunction indicator is combined with 

the low tire pressure telltale (tire pres-

sure warning light). When the system 

detects a malfunction, the telltale will 

flash for approximately one minute and 

then remain continuously illuminated. 

This sequence will continue upon subse-

quent vehicle start-ups as long as the 

malfunction exists. When the malfunction 

indicator is illuminated, the system may 

not be able to detect or signal low tire 

pressure as intended.