ECU LEXUS LS600H 2015 User Guide

431-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
◆SRS side and curtain shield airbagsSRS front side airbags
Can help protect the torso of the front seat occupants
SRS rear side airbags
Can help protect the torso of oc cupants in the rear outer seats
SRS curtain shield airbags
Can help protect primarily the head of occupants in the outer seats
SRS seat cushion airbag (relaxation seat)
Can help restrain the relaxation seat occupant
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4
5
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441-1. For safe use
LS600hL_U(OM50E41U)
SRS airbag system components
Front passenger occupant clas-
sification system (ECU and sen-
sors)
Side impact sensors (front)
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Knee airbags
Front passenger airbag
Curtain shield airbags
Front side airbags
Active head restraints
SRS warning lightRear side airbags
Seat belt pretensioners and
force limiters
Driver airbag
Seat cushion airbag
(if equipped)
Side impact sensors (rear)
Side impact sensors (front door)
Driver’s seat belt buckle switch
Driver’s seat position sensor
Airbag sensor assembly
Front impact sensors1
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3
4
5
6
7
8
9
10
11
12
13
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15
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451-1. For safe use
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For safety and security
LS600hL_U(OM50E41U)
Your vehicle is equipped with ADVANCED AIRBAGS designed based
on the US motor vehicle safety standards (FMVSS208). The airbag sen-
sor assembly (ECU) controls airbag deployment based on information
obtained from the sensors etc. show n in the system components diagram
above. This information includes crash severity and occupant information.
As the airbags deploy, a chemical reaction in the inflators quickly fills the
airbags with non-toxic gas to help restrain the motion of the occupants.
CAUTION
■SRS airbag precautions
Observe the following precautions regarding the SRS airbags.
Failure to do so may caus e death or serious injury.
●The driver and all passengers in the vehi cle 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 Admi nistration (NHTSA) advises:
Since the risk zone for the driver’s airbag is the first 2 - 3 in. (50 - 75 mm) of
inflation, 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 drivers can achieve the 10 in. (250 mm)
distance, even with the driver 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 fi rm, non-slippery cushion, 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 reco mmended by NHTSA above, while still
maintaining control of the foot pedals, steering wheel, and your view of the
instrument panel controls.

461-1. For safe use
LS600hL_U(OM50E41U)
CAUTION
■SRS airbag precautions
●The SRS front passenger airbag also deploys with considerable force, and can
cause death or serious injury especially if the front passenger is very close to the
airbag. The front passenger seat should be as far from the airbag as possible with
the seatback adjusted, so the front passenger sits upright.
●Improperly seated and/or restrained infa nts and children can be killed or seri-
ously injured by a deploying airbag. An in fant or child who is too small to use a
seat belt should be properly secured using a child restraint system. Lexus strongly
recommends that all infants and children be placed in the rear seats of the vehicle
and properly restrained. The rear seats ar e safer for infants and children than the
front passenger seat. ( P. 6 2 )
●If the seat belt extender has been con-
nected to the front seat belt buckle but the
seat belt extender has not also been fas-
tened to the latch plate of the seat belt, the
SRS front airbags will judge that the driver
and front passenger are wearing the seat
belt even though the seat belt has not been
connected. In this case, the SRS front air-
bags may not activate correctly in a colli-
sion, resulting in deat h or serious injury in
the event of a collision. Be sure to wear the
seat belt with the seat belt extender.
●Do not sit on the edge of the seat or lean
against the dashboard.

471-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
CAUTION
■SRS airbag precautions
●Do not allow a child to stand in front of the
SRS front passenger airbag unit or sit on
the knees of a front passenger.
●Do not allow the front seat occupants to
hold items on their knees.
●Do not lean against the door, the roof side
rail or the front, side and rear pillars.
●Do not allow anyone to kneel on the pas-
senger seats toward the door or put their
head or hands outside the vehicle.
●Do not attach anything to or lean anything
against areas such as the dashboard, steer-
ing wheel pad and lower portion of the
instrument panel.
These items can become projectiles when
the SRS driver, front passenger and knee
airbags deploy.
●Do not attach anything to areas such as a
door, windshield glass, side door glass, front
and rear pillar, roof side rail and assist grip.

491-1. For safe use
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For safety and security
LS600hL_U(OM50E41U)
CAUTION
■Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifications with-
out consulting your Lexus dealer. The SRS airbags may malfunction or deploy
(inflate) accidentally, causing death or serious injury.
●Installation, removal, disassembl y and repair of the SRS airbags
●Repairs, modifications, removal or replacement of the steering wheel, instrument
panel, dashboard, seats or seat upholstery, front, side and rear pillars or roof side
rails
●Repairs or modifications of the front fend er, front bumper, or side of the occupant
compartment
●Installation of a grille guard (bull bars, kangaroo bar, etc.), snow plows, winches
●Modifications to the vehicle’s suspension system
●Installation of electronic devices such as mobile two-way radios and CD players
●Modifications to your vehicle for a person with a physical disability

511-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
■SRS airbag deployment conditions (SRS side and curtain shield airbags)
●The SRS side and curtain shield airbags will 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]).
●The SRS curtain shield airbags may also deploy in the event of a severe frontal colli-
sion.
■Conditions under which the SRS airbags may deploy (inflate), other than a collision
(SRS front airbags, SRS curtain shield airbag and SRS seat cushion airbag)
The SRS front airbags, SRS curtain shield airbag and SRS seat cushion airbag may
also deploy if a serious impact occurs to the underside of your vehicle. Some exam-
ples are shown in the illustration.
■Types of collisions that may not deploy the SRS airbags (SRS front airbags and SRS
seat cushion airbag)
The SRS front airbags and SRS seat cushion airbag do not generally inflate if the
vehicle is involved in a side or rear collision, if it rolls over, or if it is involved in a low-
speed frontal collision. But, whenever a collision of any type causes sufficient for-
ward deceleration of the vehicle, deployment of the SRS front airbags and SRS seat
cushion airbag may occur.
●Hitting a curb, edge of pavement or hard
surface
●Falling into or jumping over a deep hole
●Landing hard or falling
●Collision from the side
●Collision from the rear
●Vehicle rollover

531-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
■When to contact your Lexus dealer
In the following cases, the vehicle will require inspection and/or repair. 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.
●A portion of a door is damaged or
deformed, or the vehicle was involved in an
accident that was not severe enough to
cause the SRS side and curtain shield air-
bags to inflate.
●The pad section of the steering wheel, dash-
board near the front passenger airbag or
lower portion of the instrument panel is
scratched, cracked, or otherwise damaged.
●Relaxation seat: The seat cushion surface is
scratched, cracked, or otherwise damaged.
●The surface of the seats with the side airbag
is scratched, cracked, or otherwise dam-
aged.

551-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classification
system. This system detects the cond itions of the front passenger seat
and activates or deactivates the devices for the front passenger.
Seat belt reminder light
SRS warning light
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light1
2
3
4

571-1. For safe use
1
For safety and security
LS600hL_U(OM50E41U)
■Unoccupied
■There is a malfunction in the system
Indicator/
warning light
“AIR BAG ON” and “AIR BAG OFF” indicator lightsNot illuminated
SRS warning light
Off
Front passenger’s seat belt reminder light
Devices
Front passenger airbagDeactivated
Side airbag on the right side
passenger seats
ActivatedCurtain shield airbag in the front passenger side
Front passenger knee airbagDeactivated
Front passenger’s seat belt pretensionerDeactivated or
activated
*6
Active head restraints Deactivated
Indicator/
warning light
“AIR BAG ON” and “AIR BAG OFF” indicator lights“AIR BAG OFF”
SRS warning lightOn
Front passenger’s seat belt reminder lightOff
Devices
Front passenger airbagDeactivated
Side airbag on the right side
passenger seats
ActivatedCurtain shield airbag in the front passenger side
Front passenger knee airbagDeactivated
Front passenger’s seat belt pretensioner
Activated
Active head restraints