2015 Lexus GS450h ECU

491-1. For safe use
GS450h_OM_OM30F70U_(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
2
3
4

511-1. For safe use
GS450h_OM_OM30F70U_(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

531-1. For safe use
GS450h_OM_OM30F70U_(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 7 )
*6: In case the indicator light is not illumi nated, consult this manual on how to
install the child restraint system properly. ( P. 6 1 )

551-1. For safe use
GS450h_OM_OM30F70U_(U)
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For safety and security
CAUTION
■Front passenger occupant classification system precautions
●Do not recline the front passenger seatback so far that it touches a rear seat. This
may cause the “AIR BAG OFF” indicator light to be illuminated, which indicates
that the SRS airbags for the front passenger will not activate in the event of a
severe accident. If the seatback touches the rear seat, return the seatback to a
position where it does not touch the rear seat. Keep the front passenger seatback
as upright as possible when the vehicle is moving. Reclining the seatback exces-
sively may lessen the effectiveness of the seat belt system.
●If an adult sits in the front passenger seat, the “AIR BAG ON” indicator light is illu-
minated. If th e “AIR BAG OFF” indicator is illumi nated, ask the passenger to sit
up straight, well back in the seat, feet on the floor, and with the seat belt worn cor-
rectly. If the “AIR BAG OFF” indicator stil l remains illuminated, either ask the pas-
senger to move to the rear seat, or if that is not possible, move the front passenger
seat fully rearward.
●When it is unavoidable to install a forward-facing child restraint system on the
front passenger seat, install the child rest raint system on the front passenger seat
in the proper order. ( P. 6 1 )
●Do not modify or remove the front seats.
●Do not kick the front passenger seat or subject it to severe impact. Otherwise,
the SRS warning light may come on to indicate a malfunction of the front passen-
ger occupant classification system. In this case, contact your Lexus dealer imme-
diately.
●Child restraint systems installed on the rear seat should not contact the front seat-
backs.
●Do not use a seat accessory, such as a cushion and seat cover, that covers the
seat cushion surface.
●Do not modify or replace the upholstery of the front seat.

571-1. For safe use
GS450h_OM_OM30F70U_(U)
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For safety and security
Child restraint systems
Studies have shown that installing a child restraint on a rear seat is much
safer than installing one on the front passenger seat.
●Choose a child restraint system that suits your vehicle and is appropri-
ate to the age and size of the child.
●For installation details, follow the instructions provided with the child
restraint system.
General installation instructions are provided in this manual. ( P. 6 1 )
A child restraint system for a small ch ild or baby must itself be properly
restrained on the seat with the LATCH anchors or the lap portion of the
lap/shoulder belt.
The laws of all 50 states of the U .S.A. and Canada now require the use
of child restraint systems.
Points to remember

591-1. For safe use
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For safety and security
CAUTION
■Child restraint precautions
●For effective protection in automobile accidents and sudden stops, a child must
be properly restrained, using a seat belt or child restraint system depending on
the age and size of the child. Holding a child in your arms is not a substitute for a
child restraint system. In an accident, the child can be crushed against the wind-
shield, or between you and the vehicle’s interior.
●Lexus strongly urges the use of a proper child restraint system that conforms to
the size of the child, installed on the rear seat. According to accident statistics, the
child is safer when properly restrained in the rear seat than in the front seat.
●Never install a rear-facing child restraint system on the front passenger seat even
if the “AIR BAG OFF” indicator light is illuminated.
In the event of an accident, the force of the rapid inflation of the front passenger
airbag can cause death or serious injury to the child if the rear-facing child
restraint system is installed on the front passenger seat.
●A forward-facing child restraint system may be installed on the front passenger
seat only when it is unavoidable. A child restraint system that requires a top tether
strap should not be used in the front passenger seat since there is no top tether
strap anchor for the front passenger seat. Adjust the seatback as upright as possi-
ble and always move the seat as far back as possible even if the “AIR BAG OFF”
indicator light is illuminated, because the front passenger airbag could inflate with
considerable speed and force. Otherwise, the child may be killed or seriously
injured.
●Do not use the seat belt extender when in stalling a child restraint system on the
front or rear passenger seat. If installing a child restraint system with the seat belt
extender connected to the seat belt, the seat belt will not securely hold the child
restraint system, which could cause death or serious injury to the child or other
passengers in the event of a sudden stop, sudden swerve or accident.
●Do not allow the child to lean his/her head or any part of his/her body against the
door or the area of the seat, front and rear pillars or roof side rails from which the
SRS side airbags or SRS curtain shield airbags deploy even if the child is seated in
the child restraint system. It is dangerou s if the SRS side airbags and curtain shield
airbags inflate, and the impact could cause death or serious injury to the child.
●Make sure you have complied with all installation instructions provided by the
child restraint manufacturer and that the sy stem is properly secured. If it is not
secured properly, it may cause death or seri ous injury to the child in the event of a
sudden stop, sudden swerve or accident.

601-1. For safe use
GS450h_OM_OM30F70U_(U)
CAUTION
■When children are in the vehicle
Do not allow children to play with the seat belt. If the seat belt becomes twisted
around a child’s neck, it may lead to choking or other serious injuries that could
result in death.
If this occurs and the buckle cannot be unfastened, scissors should be used to cut
the belt.
■When the child restraint system is not in use
●Keep the child restraint system properly secu red on the seat even if it is not in use.
Do not store the child restraint system unsecured in the passenger compartment.
●If it is necessary to detach the child restraint system, remove it from the vehicle or
store it securely in the trunk. If a head restraint was removed when installing a
child restraint system, always install the head restraint before driving. This will pre-
vent it from injuring passengers in the event of a sudden stop, sudden swerve or
accident.

611-1. For safe use
GS450h_OM_OM30F70U_(U)
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For safety and security
Installing child restraints
Child restraint LATCH anchors
LATCH anchors are provided for the
outboard rear seats. (Buttons display-
ing the location of the anchors are
attached to the seats.)
Seat belts equipped with a child
restraint locking mechanism (ALR/
ELR belts except driver’s seat belt)
(P. 3 4 )
Anchor brackets (for top tether
strap)
An anchor bracket is provided for
each rear seat.
Follow the child restraint system manufacturer’s instructions. Firmly
secure child restraints to the se ats using the LATCH anchors or a seat
belt. Attach the top tether strap when installing a child restraint.
The lap/shoulder belt can be used if your child restraint system is not
compatible with the LATCH (Lower Anchors and Tethers for Children)
system.