2012 Lexus LFA tire pressure

280
4-3. Do-it-yourself maintenance
CAUTION
■Proper inflation is critical to save tire performance
Keep your tires properly inflated. Otherwise, the following conditions may occur
and result in an accident causing death or serious injury:
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from overheated tires
●Poor sealing of the tire bead
●Wheel deformation and/or tire separation
●A greater possibility of tire damage from road hazards
NOTICE
■When inspecting and adjusting tire inflation pressure
Be sure to put the tire valve caps back on.
Without the valve caps, dirt or moisture could get into the valve and cause air leak-
age, which could result in an accident. If the caps are lost, replace them as soon as
possible.

281
4-3. Do-it-yourself maintenance
4
Maintenance and care
Wheels
If a wheel is bent, cracked or heavily corroded, it should be replaced.
Otherwise, the tire may separate from the wheel or cause loss of handling
control.
The wheel bolts used are exclusive to the LFA. When replacing the wheels or
wheel bolts, consult your Lexus dealer.
■ Aluminum wheel precautions
●Use only Lexus wheel bolts design ed for use with your aluminum
wheels.
● When repairing or changing your tires, check that the wheel bolts
are still tight after driving 1000 miles (1600 km).
● Use only Lexus genuine balance we ights or equivalent when bal-
ancing your wheels.
■When replacing wheels
The wheels of your Lexus are equipped with tire pressure warning valves and trans-
mitters that allow the tire pressure warning system to provide advanced warning in
the event of a loss in tire inflation pres sure. Whenever wheels are replaced, the tire
pressure warning valves and tran smitters must be installed. (P. 2 7 1 )
■Wheel bolt torque
An exclusive hub socket for the wheel bolts of
the LFA is contained in the tool bag. A 1 /2-
inch (12.7 mm) drive extension bar and a
torque wrench are required to tighten the
bolts.
Tightening torque:
81 ft
•lbf (110 N•m, 11.2 kgf•m)

282
4-3. Do-it-yourself maintenance
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
■Wheel bolts
Observe the following precautions to reduce the risk of death or serious injury:
●Do not over tighten.
●Never use oil or grease on the wheel bolts.
Oil and grease may cause the wheel bolts to be excessively tightened, leading to
bolt or disc wheel damage. In addition, the oil or grease can cause the wheel bolts
to loosen and the wheel may fall off, causing a serious accident. Remove any oil or
grease from the wheel bolts.
●If there are any cracks or deformations in the wheel bolts, or if the surface treat-
ment becomes worn, have the wheel bolts replaced at your Lexus dealer.
Failure to follow these precautions could cause the wheel bolts to loosen and the
tire to fall off, resulting in death or serious injury.
●If the wheels are frequently removed and installed due to circuit driving etc.,
Lexus recommends periodic changing of the wheel bolts.
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer.
●Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-
genuine wheels.

316
5-2. Steps to take in an emergency
*1: Open door warning buzzer
P. 3 2 7
*2: Driver’s and passenger’s seat belt reminders buzzer
The driver’s and passenger’s seat belt reminders sound to alert the driver and
passenger that their seat belt is not fa stened. The buzzer sounds intermittently
for 10 seconds after the vehicle has reached 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 20 more seconds. Tire pressure warning light
When the light comes on:
Low tire inflation pressure
Adjust the tire inflation pres-
sure to the specified level. The
light will turn off after a few
minutes. In case the light does
not turn off even if the tire infla-
tion pressure is adjusted, have
the vehicle checked by your
Lexus dealer.
When the light comes on after
blinking for 1 minute:
Malfunction in the tire pres-
sure warning system Have the system checked by
your Lexus dealer.
Master warning light A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction. 
P. 3 2 2
Warning lightWarning light/DetailsCorrection procedure

5
When trouble arises
317
5-2. Steps to take in an emergency
■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 taking several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.
■Electric power steering system warning light
When the battery is low or when the voltage drops temporarily, the electric power
steering system warnin g light may come on.
■Passenger detection sensor and passenger seat belt reminder
●If luggage is placed on the passenger seat, the 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.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light. After
the tire inflation pressure is adjusted, it may take a few minutes for the tire pressure
warning light to go off.
■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 or tire inflation pressure changes caused by temperature. In this case,
adjusting the tire inflation pressure will turn off the warning light (after a few min-
utes).

318
5-2. Steps to take in an emergency
■If the tire pressure warning system is not functioning
The tire pressure warning system will be disabled in the following conditions:
(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 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
●If there is a lot of snow or ice on the vehicle, particularly 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 a tire is repaired with the emergency tire puncture repair kit
■If the tire pressure warning light comes on after flashing frequently for 1 minute
If the tire pressure warning light comes on after flashing frequently for 1 minute
when the ignition switch is turned to th e “ON” position, have it checked by your
Lexus dealer.
■Customization that can be configured at Lexus dealer
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 383)

5
When trouble arises
319
5-2. Steps to take in an emergency
CAUTION
■When the electric 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 precaution s. 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 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 a tire is flat, tempo-
rarily repair the tire using the em ergency tire puncture repair kit ( P. 3 3 2 ) a n d
then have the tire repaired or replaced 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.

320
5-2. Steps to take in an emergency
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure re commended by the vehicle manufacturer on
the vehicle placard or tire inflation pressu re 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 vehicl e 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 driv er'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).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when th e 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 replacem ent or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pres sure 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.