light LEXUS IS250 2016 Owner's Manual

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Before driving
1-6. Theft deterrent system
Engine immobilizer system
nSystem maintenance
The vehicle has a maintenance-free type of engine immobilizer system.
nConditions that may cause the system to malfunction
lIf the grip portion of the key is in contact with a metallic object
lIf the key is in close proximity to or touching a key to the security system (key
with a built-in transponder chip) of another vehicle
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned OFF to
indicate that the system is oper-
ating.

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1-6. Theft deterrent system

Before driving
Alarm
The system sounds the alarm and flashes lights when forcible entry is
detected.
nTriggering of the alarm
The alarm is triggered in the following situations.
lA locked door or trunk is unlocked or opened in any way other
than using the entry function, wireless remote door lock function
or mechanical key with the alarm being set.
lThe hood is opened with the alarm being set.
nSetting the alarm system
Close the doors, trunk and
hood, and lock all doors.
The system will be set automati-
cally after 30 seconds.
The indicator light changes from
being on to flashing when the
system is set.
nDeactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm.
lUnlock the doors or trunk using the entry function, wireless
remote door lock function or mechanical key.
lTurn the “ENGINE START STOP” switch to ACCESSORY or
IGNITION ON mode. (The alarm will be deactivated or stopped
after a few seconds.)

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1-7. Safety information
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Before driving
Airbag system components
Your vehicle is equipped with ADVANCED AIRBAGS designed based
on US motor vehicle safety standards (FMVSS208). The airbag system
controls airbag deployment power for the driver and front passenger. The
driver airbag system consists of the driver seat’s position sensor etc. The
front passenger’s airbag system consists of the front passenger occupant
classification sensor etc.
The main SRS airbag system components are shown above. The SRS air-
bag system is controlled by the airbag sensor assembly. The airbag sen-
sor assembly consists of a safing sensor and an airbag sensor.
Knee airbags
Front passenger airbag
Curtain shield airbags
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Side airbags
Side and curtain shield airbag
sensors
Curtain shield airbag sensors
SRS warning light
Driver airbag
Driver's seat belt buckle switch
Driver's seat position sensor
Front passenger’s seat belt
buckle switch
Airbag sensor assembly
Occupant detection system
(ECU and sensors)
Front airbag sensors

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1-7. Safety information
In certain types of severe frontal or side impacts, the SRS airbag system
triggers the airbag inflators. A chemical reaction in the inflators quickly
fills the airbags with non-toxic gas to help restrain the motion of the occu-
pants.
nSRS warning light
This warning light system monitors the airbag sensor assembly, front airbag sensors,
side and curtain shield airbag sensor assemblies, curtain shield airbag sensor
assemblies, driver's seat position sensor, driver's seat belt buckle switch, seat belt
pretensioner assemblies, inflators, interconnecting wiring and power sources.
(→P. 3 8 4 )
nIf the SRS airbags deploy (inflate)
lBruising and slight abrasions may result from contact with a deploying (inflating)
SRS airbag.
lA loud noise and white powder will be emitted.
lParts of the airbag module (steering wheel, airbag cover and inflator) as well as
the front seats, and parts of the front pillar, rear pillar and roof side rail, may be
hot for several minutes. The airbag itself may also be hot.
lThe windshield may crack.
nOperating conditions (front airbags)
lThe SRS front airbags will deploy if the severity of the frontal impact is above the
designed threshold level, comparable to an approximate 15 mph (25 km/h) col-
lision when the vehicle impacts straight into a fixed barrier that does not move
or deform.
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.).
lIt is possible that in some collisions where the forward deceleration of the vehi-
cle is very close to the designed threshold level, the SRS front airbags and the
seat belt pretensioners may not activate together.
lThe SRS front passenger airbag will not activate if there is no passenger sitting
in the front passenger seat. However, the front passenger airbag may deploy if
luggage is put in the seat, or the seat belt is fastened, even if the seat is unoccu-
pied. (→P. 9 5 )

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1-7. Safety information

Before driving
Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classification sys-
tem. This system detects the conditions of the front passenger seat and
activates or deactivates the devices for front passenger.
SRS warning light
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light
Front passenger’s seat belt reminder light

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1-7. Safety information
Condition and operation in the front passenger occupant classification system
nAdult*1
nChild *3 or child restraint system*4
Indicator/
warning light

“AIR BAG ON” and “AIR BAG OFF” indicator
lights
“A I R B A G
ON”
SRS warning lightOff
Front passenger’s seat belt reminder lightFlashing*2
Devices
Front passenger airbag
Activated
Side airbag on the front
passenger seat

Curtain shield airbag in the front passenger side
Front passenger knee airbag
Front passenger’s seat belt pretensioner
Indicator/
warning light

“AIR BAG ON” and “AIR BAG OFF” indicator
lights
“A I R B A G
OFF” *5
SRS warning lightOff
Front passenger’s seat belt reminder lightFlashing*2
Devices
Front passenger airbag
DeactivatedSide airbag on the front
passenger seat

Curtain shield airbag in the front passenger side
Activated
Front passenger knee airbag Deactivated
Front passenger’s seat belt pretensioner Activated

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1-7. Safety information
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Before driving
nUnoccupied
nThere is a malfunction in the system
*1: The system judges a person of adult size as an adult. When a smaller
adult sits in the front passenger seat, the system may recognize him/
her as a child depending on his/her physique and posture.
*2: In the event the front passenger does not wear a seat belt.
*3: When a larger child who has outgrown a child restraint system sits in
the front passenger seat, the system may recognize him/her as an
adult depending on his/her physique or posture.
Indicator/
warning light
“AIR BAG ON” and “AIR BAG OFF” indicator
lights Not illuminated
SRS warning lightOffFront passenger’s seat belt reminder light
Devices
Front passenger airbag
DeactivatedSide airbag on the front
passenger seat

Curtain shield airbag in the front passenger side
Activated
Front passenger knee airbagDeactivatedFront passenger’s seat belt pretensioner
Indicator/
warning light

“AIR BAG ON” and “AIR BAG OFF” indicator
lights
“A I R B A G
OFF”
SRS warning light On
Front passenger’s seat belt reminder light Off
Devices
Front passenger airbag
DeactivatedSide airbag on the front
passenger seat

Curtain shield airbag in the front passenger side
Activated
Front passenger knee airbag Deactivated
Front passenger’s seat belt pretensioner Activated

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1-7. Safety information
*4: Never install a rear-facing child restraint system on the front passen-
ger seat. A forward-facing child restraint system should only be
installed on the front passenger seat when it is unavoidable. (→P.
100)
*5: In case the indicator is not illuminated, consult this manual as for
installing the child restraint system properly. (→P. 1 0 4 )
CAUTION
nFront passenger occupant classification system precautions
Observe the following precautions regarding front passenger occupant classifica-
tion system.
Failure to do so may cause death or serious injury.
lWear the seat belt properly.
lMake sure the front passenger’s seat belt tab has not been left inserted into the
buckle before someone sits in the front passenger seat.
lMake sure the “AIR BAG OFF” indicator light is not illuminated when using the
seat belt extender for the front passenger seat. If the “AIR BAG OFF” indicator
light is illuminated, disconnect the extender tongue from the seat belt buckle,
then reconnect the seat belt. Reconnect the seat belt extender after making sure
the “AIR BAG ON” indicator light is illuminated. If you use the seat belt extender
while the “AIR BAG OFF” indicator light is illuminated, the front passenger air-
bag, side airbag on the front passenger side and front passenger knee airbag may
not activate correctly, which could cause death or serious injury in the event of
collision.
lDo not put weight on the front passenger seat by putting your hands or feet on
the front passenger seat seatback from the rear passenger seat.
lDo not let a rear passenger lift the front passenger seat with their feet or press on
the seatback with their legs.
lDo not put objects under the front passenger seat.

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1-7. Safety information
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Before driving
CAUTION
nFront passenger occupant classification system precautions
lDo 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 passenger’s airbags will not deploy 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 excessively may lessen the
effectiveness of the seat belt system.
lIf an adult sits in the front passenger seat, the “AIR BAG ON” indicator light is illu-
minated. If the “AIR BAG OFF” indicator is illuminated, 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 still remain 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.
lWhen it is unavoidable to install the forward-facing child restraint system on the
front passenger seat, install the child restraint system on the front passenger seat
in the proper order. (→P. 1 0 4 )
lDo not modify or remove the front seats.
lDo 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 detection sys-
tem. In this case, contact your Lexus dealer immediately.
lChild restraint systems installed on the rear seat should not contact the front seat-
backs.
lDo not use a seat accessory, such as a cushion or seat cover, that covers the seat
cushion surface.
lDo not modify or replace the upholstery of the front seat.

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1-7. Safety information
CAUTION
nChild restraint precautions
lLexus 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.
lNever 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 seri-
ous injury to the child if the rear-facing child restraint system is installed on the
front passenger seat.
lA forward-facing child restraint system may allowed to 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 possible 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.
lDo not use the seat belt extender when installing 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 collision.
lDo 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 pillar, rear pillar or roof side rail from which the
side airbags or curtain shield airbags deploy even if the child is seated in the child
restraint system. It is dangerous if the side airbags and curtain shield airbags
inflate, and the impact could cause death or serious injury to the child.
lMake sure you have complied with all installation instructions provided by the
child restraint manufacturer and that the system is properly secured. If it is not
secured properly, it may cause death or serious injury to the child in the event of a
sudden stop or accident.