Lexus NX: If a warning light turns on or a warning buzzer sounds

Calmly perform the following actions if any of the warning lights comes on or flashes. If a light comes on or flashes, but then goes off, this does not necessarily indicate a malfunction in the system. However, if this continues to occur, have the vehicle inspected by your Lexus dealer.

Actions to the warning lights or warning buzzers

■ Brake system warning light (warning buzzer)

■ Charging system warning light*

*: This light illuminates on the multi-information display.

■ Output control warning light* (warning buzzer)

*: This light illuminates on the multi-information display.

■ Low engine oil pressure warning light* (warning buzzer)

*: This light illuminates on the multi-information display.

■ High coolant temperature warning light* (warning buzzer)

*: This light illuminates on the multi-information display.

■ Brake system warning light

■ Malfunction indicator lamp

■ SRS warning light

■ ABS warning light

■ Electric power steering system warning light (warning buzzer)

■ PCS warning light

■ LTA indicator* (warning buzzer)

*: This light illuminates on the multi-information display.

■ LDA indicator* (warning buzzer)

*: This light illuminates on the multi-information display.

■ PKSB OFF indicator (warning buzzer)

■ Slip indicator light

■ Brake hold operated indicator

■ Parking brake indicator

■ Low fuel level warning light

■ Driver's and front passenger's seat belt reminder light (warning buzzer*)

*: Driver's and front passenger's seat belt warning buzzer: The driver's seat belt warning buzzer sounds to alert the driver that his or her seat belt is not fastened. Once the power switch is turned to IGNITION ON mode, the buzzer sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds once. If the seat belt is still unfastened after 24 seconds, the buzzer will sound intermittently for 6 seconds. Then, if the seat belt is still unfastened, the buzzer will sound in a different tone for 90 more seconds.

The front passenger's seat belt warning buzzer sounds to alert the front passenger that his or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of 12 mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound intermittently for 6 seconds. Then, if the seat belt is still unfastened, the buzzer will sound in a different tone for 90 more seconds.

■ Rear passengers' seat belt reminder light*1 (warning buzzer*2)

*1: This light illuminates on the center panel.
*2: Rear passengers' seat belt warning buzzer: The rear passengers' seat belt warning buzzer sounds to alert the rear passengers that his or her seat belt is not fastened. The buzzer sounds for 6 seconds after the vehicle reaches a speed of 12 mph (20 km/h). Then, if the seat belt is still unfastened, the buzzer will sound in a different tone for 24 more seconds.

■ Master warning light (warning buzzer)

■ Tire pressure warning light

■ Brake Override System/Drive-Start Control warning light* (warning buzzer)

*: This light illuminates on the multi-information display.

■SRS warning light This warning light system monitors the airbag sensor assembly, front impact sensors, side impact sensors (front door), side impact sensors (rear), driver's seat position sensor, driver's seat belt buckle switch, front passenger occupant classification system (ECU and sensors), "AIR BAG ON" indicator light, "AIR BAG OFF" indicator light, front passenger's seat belt buckle switch, driver's seat belt pretensioner, front passenger's seat belt pretensioner and force limiter, airbags, interconnecting wiring and power sources.

■Front passenger detection sensor, seat belt reminder and warning buzzer

• If luggage is placed on the front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound 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.

■Electric power steering system warning light (warning buzzer) When the 12-volt battery charge becomes insufficient of the voltage temporarily drops, the electric power steering system warning light may come on and the warning buzzer may sound.

■If the malfunction indicator lamp comes on while driving

First check the following:

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

The light will go off after 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 Inspect the appearance of the tire to check that the tire is not punctured.

Carry out the following procedure after the tire temperature has lowered sufficiently.

• Check the tire inflation pressure and adjust to the appropriate level.
• If the warning light does not go out even after several minutes, check that the tire inflation pressure is at the specified level and carry out initialization.

The warning light may come on again if the above operations are conducted without first allowing the tire temperature to lower sufficiently.

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

■When a tire is replaced with a spare tire The compact spare tire is not equipped with a tire pressure warning valve and transmitter.

If a tire goes flat, the tire pressure warning light will not turn off even though the flat tire has been replaced with the spare tire.

Replace the spare tire with the repaired tire and adjust the tire inflation pressure. The tire pressure warning light will go off after a few minutes.

■If the tire pressure warning light frequently comes on after blinking for 1 minute If the tire pressure warning light frequently comes on after blinking for 1 minute when the power switch is turned to ON mode, have it checked by your Lexus dealer.

■Warning buzzer In some cases, the buzzer may not be heard due to being in a noisy location or audio sound.

WARNING

■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.

Failure to do so could cause a 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 pressure immediately.

WARNING

• 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 braking.

  If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.

■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 significantly under-inflated. Accordingly, 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 significantly under-inflated tire causes the tire to overheat and can lead to tire failure.

TPMS (tire pressure warning system) malfunctions may occur for a variety of reasons, 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 telltale 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

■To ensure the tire pressure warning system operates properly Do not install tires with different specifications or makers, as the tire pressure warning system may not operate properly.

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