After taking the specified steps to correct the suspected problem, check that the warning light turns off.

*1: Open door warning buzzer:

The open door warning buzzer sounds to alert one or more of the doors is not fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).

*2:Driver’s and front passenger’s seat belt reminder buzzer:

The driver’s and front passenger’s seat belts reminder buzzer sounds to alert the driver and front passenger that his/her seat belt is not fastened. Once the “ENGINE START STOP” switch is turned to IGNITION ON mode, the buzzer sounds for 4 to 8 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer will sound in a different tone for 20 more seconds.

 - SRS warning light

This warning light system monitors the airbag sensor assembly, front airbag sensors, side and curtain shield airbag sensors, rear side and curtain shield airbag sensors, floor sensor, driver’s seat belt buckle switch, front passenger occupant classification system (ECU and sensors), “AIR BAG ON” indicator light, “AIR BAG OFF” indica- tor light, the “RSCA OFF” indicator light, front passenger’s seat belt buckle switch, seat belt pretensioner assemblies, airbags, interconnecting wiring and power sources.

 - Front passenger detection sensor and passenger seat belt reminder

• If luggage is placed on the front passenger seat, the front passenger detection sensor may cause the warning light to flash, even if a passenger is not sitting in the seat.

• If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning light may not operate properly.

 - If the malfunction indicator lamp comes on while driving

First check the following:

• Is your vehicle low on gas? If it is, refuel the vehicle immediately.

• Is the fuel tank cap loose? If it is, tighten it securely.

The light will go off after taking several driving trips.

If the light does not go off even after several trips, contact your Lexus dealer as soon as possible.

 - When the tire pressure warning light comes on

Check the tire inflation pressure and adjust to the appropriate level.

 - The tire pressure warning light may turn on due to natural causes

The tire pressure warning light may turn on due to natural causes such as natural air leaks or tire inflation pressure changes caused by temperature. In this case, adjust- ing the tire inflation pressure will turn off the warning light (after a few minutes).

 - 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.

 - 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/cm2 or bar) or higher.

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 genuine 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 for 1 minute frequently when the engine switch is turned to the “ON” position, have it checked by your Lexus dealer.

CAUTION

 - If both the ABS and the brake system warning lights remain on

Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehicle will become extremely unstable during braking, and the ABS system may fail, which could cause an accident resulting in death or serious injury.

 - When the power steering system warning light comes on

The steering wheel may become extremely heavy.

If the steering wheel becomes heavier than usual when operating, hold firmly and operate using more force than usual.

 - If the tire pressure warning light comes on

Be sure to observe the following precautions. Failure to do so could cause loss of vehicle control and result in death or serious injury.

• Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres- sure immediately.

• If the tire pressure warning light comes on even after tire inflation pressure adjust- ment, it is probable that you have a flat tire. Check the tires. If the tire is flat, change to the spare tire and have the flat tire repaired by the nearest Lexus dealer.

• Avoid abrupt maneuvering and braking. 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

CAUTION

 - Maintenance of the tires

Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label (tire and load information label).

(If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation 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 warning light) when one or more of your tires is sig- nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres- sure warning light) illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under- inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability.

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 illumination of the TPMS low tire pressure telltale (tire pressure warning light).

CAUTION

 - Maintenance of the tires

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 pressure 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 subsequent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is illumi- nated, the system may not be able to detect or signal low tire pressure as intended.

TPMS (tire pressure warning system) malfunctions may occur for a variety of rea- sons, including the installation of replacement or alternate tires or wheels on the vehicle that prevent the TPMS (tire pressure warning system) from functioning properly. Always check the TPMS (tire pressure warning system) malfunction tell- tale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS (tire pressure warning system) to continue to function properly.

NOTICE

 - Precaution when installing a different tire

When a tire of a different specification or maker is installed, the tire pressure warn- ing system may not operate properly.