ECU Lexus GS350 2014 Do-it-yourself maintenance /

371-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
◆SRS side and curtain shield airbags
SRS 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
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4

381-1. For safe use
GS350_OM_OM30D41U_(U)
SRS airbag system components
Front passenger occupant clas-
sification system (ECU and sen-
sors)
Side impact sensors (front
doors)
Knee airbags
Front passenger airbag
Curtain shield airbags
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Seat belt pretensioners and
force limiters
Side impact sensors (front)Front side airbags
SRS warning light
Driver airbag
Rear side airbags
Side impact sensors (rear)
Driver’s seat position sensor
Driver’s seat belt buckle switch
Airbag sensor assembly
Front passenger’s seat belt
buckle switch
Front impact sensors1
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3
4
5
6
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8
9
10
11
12
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15
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391-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
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.

401-1. For safe use
GS350_OM_OM30D41U_(U)
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. 5 5 )
●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.

411-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
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, lower portion of the instru-
ment panel and door of the glove box.
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
or rear pillar, roof side rail and assist grip.

431-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
■If the SRS airbags deploy (inflate)
●Bruising and slight abrasions 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 hub, airbag cover and inflator) as well as
the seats, the glove box, parts of the front and rear pillars, and roof side rails 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 ascer-
tain the level of emergency and assistance required. If the occupants are unable to
communicate, the agent automatically treats the call as an emergency and helps to
dispatch the necessary emergency services. ( P. 6 0 0 )
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, glove box, 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 or 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

451-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
■Types of collisions that may not deploy the SRS airbags (SRS front airbags)
The SRS front airbags 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 forward deceleration of the vehi-
cle, deployment of the SRS front airbags may occur.
■Types of collisions that may not deploy th e SRS airbags (SRS side and curtain shield
airbags)
The SRS side and curtain shield airbags may not activate if the vehicle is subjected to
a collision from the side at certain angles, or a collision to the side of the vehicle body
other than the passenger compartment.
The SRS side and curtain shield airbags do not generally inflate if the vehicle is
involved in a frontal or rear collision, if it rolls over, or if it is involved in a low-speed
side collision.
●Collision from the side
●Collision from the rear
●Vehicle rollover
●Collision from the side to the vehicle body
other than the passenger compartment
●Collision from the side at an angle
●Collision from the front*
●Collision from the rear
●Vehicle rollover
*: Depending on the conditions and type of
accident, the curtain shield airbags may
deploy (inflate) upon frontal impact.

471-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
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
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3
4

491-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
■Child*4
■Child restraint system with infant*5
Indicator/
warning light
“AIR BAG ON” and “AIR BAG OFF” indicator lights“AIR BAG OFF” or
“A I R B A G O N ”
*4
SRS warning lightOff
Seat belt reminder lightOff*2 or
flashing
*3
Devices
Front passenger airbagDeactivated or activated
*4
Side airbag
on the front passenger seat
ActivatedCurtain shield airbag
in the front passenger side
Front passenger knee airbagDeactivated or activated
*4
Front passenger’s seat belt pretensionerActivated
Indicator/
warning light
“AIR BAG ON” and “AIR BAG OFF” indicator lights“A I R B A G OFF”
*6
SRS warning lightOff
Seat belt reminder lightOff*2 or
flashing
*3
Devices
Front passenger airbagDeactivated
Side airbag
on the front passenger seat
ActivatedCurtain shield airbag
in the front passenger side
Front passenger knee airbagDeactivated
Front passenger’s seat belt pretensionerActivated

511-1. For safe use
GS350_OM_OM30D41U_(U)
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For safety and security
*1: The system judges a person of adult size as an adult. When a smaller adult sitsin the front passenger seat, the system may not recognize him/her as an adult
depending on his/her physique and posture.
*2: In the event the front passenger is wearing a seat belt.
*3: In the event the front passenger does not wear a seat belt
*4: For some children, child in seat, child in booster seat or child in convertible seat, the system may not recognize him/her as a child. Factors which may
affect this can be the physique or posture.
*5: Never install a rear-facing child restraint system on the front passenger seat. Aforward-facing child restraint system shou ld only be installed on the front pas-
senger seat when it is unavoidable. ( P. 5 5 )
*6: In case the indicator light is not illumi nated, consult this manual on how to
install the child restraint system properly. ( P. 5 9 )