lexus LFA 2012 Owner's Manual / LEXUS 2012 LFA (OM77006U) Repair Manual

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1
Before driving
1-7.Safety information
Correct driving posture
Drive in a good posture as follows:
Sit upright and well back in the
seat. (P. 32)
Adjust the position of the seat
forward or backward to ensure
the pedals can be reached and
easily depressed to the extent
required. ( P. 32)
Adjust the seatback so that the
controls are easily operable.
( P. 32)
Adjust the tilt and telescopic
positions of the steering wheel
downward so the airbag is fac-
ing your chest. ( P. 4 1 )
Wear the seat belt correctly.
( P. 36)

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1-7. Safety information
CAUTION
■While driving
●Do not adjust the position of the driver’s seat while driving.
Doing so could cause the driver to lose control of the vehicle.
●Do not place a cushion between the driver or passenger and the seatback.
A cushion may prevent correct posture from being achieved, and reduce the
effectiveness of the seat belt, increasing th e risk of death or serious injury to the
driver or passenger.
●Do not place anything under the seats.
Objects placed under the se ats may become jammed in the seat tracks and stop
the seat from locking in place. This may lead to an accident, resulting in death or
serious injury. The adjustment mechanism may also be damaged.
■Adjusting the seat position
Do not put your hands under the seat or near the moving parts to avoid injury.
Fingers or hands may become jammed in the seat mechanism.

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1
1-7. Safety information
Before driving
SRS airbags
The SRS airbags inflate when the vehicle is subjected to certain types of
severe impacts that may cause significant injury to the occupants. They work
together with the seat belts to help redu ce the risk of death or serious injury.
SRS driver airbag/passenger airbag
Can help protect the head and chest of the driver and passenger from
impact with interior components.
SRS driver’s knee airbag
Can help provide driver protection.

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1-7. Safety information
SRS seat belt airbags
Can help protect the head and chest of the driver and passenger from
impact with interior components.

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1-7. Safety information
1
Before driving
Airbag system componentsYour vehicle is equipped with AD VANCED AIRBAGS designed based
on US motor vehicle sa fety standards (FMVSS208). The airbag system
controls airbag deployment power for the driver and passenger. The
driver airbag system consist s of the driver’s seat position sensor etc. The
passenger’s airbag system consists of the passenger occupant classifica-
tion sensor etc. Passenger airbag
Seat belt airbag sensors
Occupant detection system
ECU
Occupant detection system
sensor
Seat belt buckle switches
Seat belt airbags
Airbag sensor assembly
Driver's seat position sensor
Driver’s knee airbag
Driver airbag
SRS warning light
“A I R B A G O N ” a n d “A I R
BAG OFF” indicator lights
Front airbag and seat belt air-
bag sensors

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1-7. Safety information
The main SRS airbag system components are shown above. The SRS air-
bag system is controlled by the airb ag sensor assembly. The airbag sen-
sor assembly consists of a safing sensor and an airbag sensor.
In certain types of severe frontal or side impacts, the SRS airbag system
triggers the airbag inflators. A chemica l reaction in the inflators quickly
fills the airbags with non-toxic gas to he lp restrain the motion of the occu-
pants.
■If the SRS airbags deploy (inflate)
●Bruising and slight abrasion s may result from contact with a deploying (inflating)
SRS airbag.
●A loud noise and white powder will be emitted.
●Parts of the airbag module (steering wheel , airbag cover and inflator) as well as
the seats may be hot for several minutes. The airbag itself may also be hot.
●The windshield may crack.
●For Safety Connect subscribers, if the SRS airbags deploy or in the event of a
severe rear-end collision, the system is designed to send an emergency call to
the response center, notifying them of the vehicle’s location (without needing to
push the “SOS” button) and an agent will attempt to speak with the occupants
to ascertain the level of emergency and assistance required. If the occupants
are unable to communicate, the agent automatically treats the call as an emer-
gency and helps to dispatch the necessary emergency services. ( P. 2 1 9 )

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1-7. Safety information
1
Before driving
■SRS airbag deployment conditions
●The SRS front airbags will deploy in the event of an impact that exceeds the
set threshold level (the level of force corresponding to a 12 - 18 mph [20 - 30
km/h] frontal collision with a fixed wall that does not move or deform). In addi-
tion, the SRS seat belt airbags will also deploy in the event of an impact that
exceeds the set threshold level (the level of force corresponding to the impact
force produced by an approximately 3300 lb. [1500 kg] vehicle colliding with
the vehicle cabin from a direction perpendicular to the vehicle orientation at an
approximate speed of 12 - 18 mph [20 - 30 km/h]).
However, this threshold velocity will be considerably higher if the vehicle strikes
an object, such as a parked vehicle or sign pole, which can move or deform on
impact, or if the vehicle is involved in an underride collision (e.g. a collision in
which the front of the vehicle “underrides”, or goes under, the bed of a truck, etc.).
●It is possible that in some collisions where the forward deceleration of the vehi-
cle is very close to the designed thresh old level, the SRS front airbags and the
seat belt pretensioners ma y not activate together.
●The SRS passenger airbag will not activate if there is no passenger sitting in the
passenger seat. However, the passenger airbag may deploy if luggage is put in
the seat, or the seat belt is fastened , even if the seat is unoccupied. (P. 7 2 )
■Conditions under which the SRS airbags may deploy (inflate), other than a colli-
sion
The SRS front airbags may also deploy if a serious impact occurs to the underside of
your vehicle. Some examples are shown in the illustration.
●Hitting a curb, edge of pavement or hard
surface
●Falling into or jumping over a deep hole
●Landing hard or vehicle falling

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1-7. Safety information
■Types of collisions that may not deploy the SRS airbag (except SRS seat belt air-
bags)
In situations similar to the examples shown in the illustration and description below,
the SRS front airbags are generally not designed to inflate. But, whenever a collision
of any type causes sufficient forward deceleration of the vehicle, deployment of the
SRS front airbags may occur.
■Types of collisions that may not deploy the SRS airbags
(SRS seat belt airbags)
The seat belt airbag will not deploy if the seat belt is not fastened.
Also, the SRS seat belt airbags are not gene rally designed to inflate in the following
situations. However, deployment of the SRS seat belt airbags may occur should the
vehicle be subjected to a strong impact in a side collision, as well as when a collision
of any type causes sufficient fo rward deceleration of the vehicle.
●Collision from the side
●Collision from the rear
●Vehicle rollover
●Low-speed frontal collision
●Collision from the rear
●Vehicle rollover
●Low-speed side collision
●Collision from the side to the vehicle body
other than the passenger compartment

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1-7. Safety information
1
Before driving
■When to contact your Lexus dealer
In the following cases, contact your Lexus dealer as soon as possible:
●Any of the SRS airbags have been inflated.
●The front of the vehicle is damaged or
deformed, or was involved in an accident
that was not severe enough to cause the
SRS airbags to inflate.
●The seat belt is torn, worn or otherwise
damaged in an accident that was not
severe enough to cause the SRS seat belt
airbags to inflate.
●The pad section of the steering wheel,
dashboard near the passenger airbag,
lower portion of the instrument panel, or
the seat belt is scratched, cracked, or oth-
erwise damaged.

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1-7. Safety information
CAUTION
■SRS airbag precautions
Observe the following precautions regarding the airbags.
Failure to do so may cause death or serious injury.
●The driver and passenger in the vehicle must wear their seat belts properly.
The SRS airbags are supplemental devices to be used with the seat belts.
●The SRS driver airbag deploys with considerable force, and can cause death or
serious injury especially if the driver is very close to the airbag. The National
Highway Traffic Safety Administration (“NHTSA”) advises:
Since the risk zone for the driver airbag is the first 2 - 3 in. (50 - 75 mm) of infla-
tion, placing yourself 10 in. (250 mm) from your driver airbag provides you with a
clear margin of safety. This distance is measured from the center of the steering
wheel to your breastbone. If you sit less than 10 in. (250 mm) away now, you can
change your driving position in several ways:
• Move your seat to the rear as far as you can while still reaching the pedals
comfortably.
• Slightly recline the back of the seat. Although vehicle designs vary, many dr ivers can achieve the 10 in. (250 mm)
distance, even with the driver’s seat all the way forward, simply by reclining
the back of the seat somewhat. If reclining the back of your seat makes it hard
to see the road, raise yourself by using a firm, or raise the seat if your vehicle
has that feature.
• If your steering wheel is adjustable, ti lt it downward. This points the airbag
toward your chest instead of your head and neck.
The seat should be adjusted as recommended by NHTSA above, while still main-
taining control of the foot pedals, steering wheel, and your view of the instrument
panel controls.