ECU Lexus IS300h 2017 User Guide

461-1. For safe use
IS300h_EE(OM53D89E)
WARNING
■SRS airbag precautions
●The SRS front passenger airbag also deploys with considerable force, and can cause
death or serious injury especially if the fron t 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 infant s and children can be killed or seriously
injured by a deploying airbag. An infant or child who is too small to use a seat belt should be properly secured using a chil d restraint system. Lexus strongly recom-
mends that all infants and children be placed in the rear seats of the vehicle and prop-
erly restrained. The rear se ats are safer for infants and children than the front passenger seat. ( P. 59)
●Do not sit on the edge of the seat or lean
against the dashboard.
●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.

471-1. For safe use
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For safety and security
IS300h_EE(OM53D89E)
WARNING
■SRS airbag precautions
●Do not hang coat hangers or hard objects on the coat hooks. All of these items could become projectiles and may cause death or serious injury, should the SRS curtain
shield airbags deploy.
●If a vinyl cover is put on the area where the SRS knee airbag will deploy, be sure to remove it.
●Do not use seat accessories which cover the parts where the SRS side airbags inflate
as they may interfere with inflation of th e airbags. Such accessories may prevent the side airbags from activating correctly, disable the system or cause the side airbags to
inflate accidentally, resulting in death or serious injury.
●Do not allow anyone to kneel on the passen-
ger 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, steering
wheel pad and lower po rtion of the instru-
ment panel. These items can become projectiles when the
SRS driver, front passeng er and knee airbags
deploy.
●Do not attach anything to areas such as a door,
windshield glass, side d oor glass, front or rear pillar, roof side rail and assist grip. (Except for
the speed limit sticker P. 614)

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IS300h_EE(OM53D89E)
■If the SRS airbags deploy (inflate)
●Slight abrasions, burns, bruising etc., may be sustained from SRS airbags, due to the
extremely high speed deployment (inflation) by hot gases.
●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
front seats, 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.
●Vehicles with ERA-GLONASS: If the SRS airbags deploy, the system is designed tosend an emergency call* to the Public Safety Answering Point (PSAP), 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 asce rtain 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. 496)
*: In some cases, the call cannot be made. (P. 498)
■SRS airbag deployment conditions (SRS front airbags)
●The SRS front airbags will deploy in the event of an impact that exceeds the set thresh-
old level (the level of force corresponding to an approximately 20 - 30 km/h [12 - 18 mph] frontal collision with a fixed wa ll that does not move or deform).
However, this threshold veloci ty will be considerably higher in the following situations:
• If the vehicle strikes an object, such as a parked vehicle or sign pole, which can move or deform on impact
• If the vehicle is involved in an underride collision, such as a collision in which the
front of the vehicle “underrides”, or goes under, the bed of a truck
●Depending on the type of collision, it is possible that only the seat belt pretensioners will
activate.
■SRS airbag deployment conditions (S RS 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 1500 kg [3300 lb.] vehicle colliding with the vehicle
cabin from a direction perpendicular to th e vehicle orientation at an approximate
speed of 20 - 30 km/h [12 - 18 mph]).
●The SRS curtain shield airbags will deploy in the event of a severe frontal collision.

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IS300h_EE(OM53D89E)
■Types of collisions that may not deploy the SRS airbags (SRS side and curtain shield air-
bags)
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 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.
The SRS curtain shield airbags do not generally inflate if the vehicle is involved in a rear collision, if it rolls over, or if it is involved in a low-speed side or low-speed frontal collision.
●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
●Collision from the rear
●Vehicle rollover

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“PASSENGER AIR BAG” indicator
The “ON” indicator light turns on when
the airbag system is on (only when the power switch is in ON mode).
Airbag manual on-off switch
Insert the mechanical key into the cylin-
der and rotate to the “OFF” position.
The “OFF” indicator light turns on (only when the power switch is in ON mode).
Airbag manual on-off system
This system deactivates the front passenger airbag and front passenger knee
airbag.
Only deactivate the airbags when using a child restraint system on the front
passenger seat.
1
2
Deactivating the front seat passenger airbag and front passenger knee
airbag

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IS300h_EE(OM53D89E)
When the sensors located at the back of the front bumper detect an impact with
a body, such as a pedestrian, which meets or exceeds the threshold level while
the vehicle is being driven within the operational speed range, the system
becomes operational and raises the rear portion of the hood.
Sensors
Hood
Lifters
Pop Up Hood
In the event of a frontal collision with a body, such as a pedestrian, the Pop Up
Hood system raises the rear portion of the hood to reduce the possibility of a
serious impact to the pedestrian’s he ad area by adding clearance to the
engine compartment.
Pop Up Hood mechanism
1
2
3

571-1. For safe use
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■Pop Up Hood precautions
●Before scrapping your vehicle, make sure to contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
●The Pop Up Hood system cannot be reused once it has operated. Have it replaced by
any authorized Lexus retailer or Lexus auth orized repairer, or any reliable repairer.
■Conditions under which the Pop Up Hood may not operate properly
The Pop Up Hood may not operate prop erly under the following conditions:
●If a pedestrian collides with the right or left corner of the front bumper or the side of the
vehicle. As such impacts may be difficult to detect, the system may not operate.
●If the vehicle speed is not detected correctly, such as if the vehicle is sliding sideways,
the system may not operate properly.
■Conditions under which the Pop Up Hood may not operate
The Pop Up Hood may not operate in the following situations:
●Colliding with a lying pedestrian
●A frontal impact applied to the front bumper while driving at speeds outside of the operational speed range
●A side impact or rear impact
●A vehicle rollover (In some accident si tuations, the Pop Up Hood may operate.)
NOTICE
■Pop Up Hood precautions
●Make sure to close the hood before driving, as the system may not operate properly if
the hood is not fully closed.
●Make sure that all 4 tires are of the specif ied size and inflated to the specified tire
pressure ( P. 652). If tires of a different size are used, the system may not operate
properly.
●If something has hit the area around the front bumper, the sensors may be damaged
even if the Pop Up Hood has not operated. Have the vehicle inspected by any autho-
rized Lexus retailer or Lexus authoriz ed repairer, or any reliable repairer.
●Do not remove or repair the parts or wiring of the Pop Up Hood, as doing so may
cause accidental operation or prevent the sy stem from operating properly. If repair or
replacement is necessary, contact any auth orized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●Do not remove such components as th e front bumper, hood or suspension, or
replace them with non-genuine parts, as doing so may prevent the system from oper- ating properly.
●Do not install anything to the front bumper or hood, as doing so may prevent the sen-
sors from detecting an impact correctly an d prevent the system from operating prop- erly.
●Do not close the hood with force or apply load to the lifters, as doing so may damage
the lifters and prevent the system from operating properly.
●Do not modify the suspension, as changes made to the vehicle height may prevent
the system from op erating properly.

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Studies have shown that installing a child restraint on a rear seat is much safer
than installing one on th e front passenger seat.
●Choose a child restraint system that suits your vehicle and is appropriate to
the age and size of the child.
●For installation details, follow the instruct ions provided with the child restraint
system.
General installation instructions are provided in this manual. (P. 67)
●If child restraint system regulations exist in the country where you reside,
please contact any authorized Lexus re tailer or Lexus authorized repairer, or
any reliable repairer for the child restraint system installation.
●Lexus recommends that you use a child restraint system which conforms to
the regulation ECE No.44.
Child restraint systems
Lexus strongly urges the use of child restraint systems.
Points to remember

601-1. For safe use
IS300h_EE(OM53D89E)
Child restraint systems are classified into the following 5 groups according to the
regulation ECE No.44:
Group 0: Up to 10 kg (22 lb.) (0 - 9 months)
Group 0+: Up to 13 kg (28 lb.) (0 - 2 years)
Group I: 9 to 18 kg (20 to 39 lb.) (9 months - 4 years)
Group II: 15 to 25 kg (34 to 55 lb.) (4 years - 7 years)
Group III: 22 to 36 kg (49 to 79 lb.) (6 years - 12 years)
In this owner’s manual, the following 3 types of popular child restraint systems
that can be secured with the seat belts are explained:
Types of child restraints
Baby seat Child seat
Equal to Group 0 and 0+ of ECE
No.44
Equal to Group 0+ and I of ECE
No.44
Junior seat
Equal to Group II and III of ECE No.44

611-1. For safe use
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For safety and security
IS300h_EE(OM53D89E)
Information provided in the table shows your child restraint system suitability for
various seating positions.
Key of letters inserted in the above table:
U: Suitable for “universal ” category child restraint system approved for the
use in this mass group.
UF: Suitable for forward-facing “unive rsal” category child restraint system
approved for the use in this mass group.
L1: Suitable for “LEXUS G 0+, BABY SAFE PLUS with SEAT BELT FIXA-
TION, BASE PLATFORM” (0 to 13 kg [0 to 28 lb.]) approved for the use
in this mass group.
L2: Suitable for “LEXUS KIDFIX” (15 to 36 kg [34 to 79 lb.]) approved for the
use in this mass group.
X: Not suitable seat position for children in this mass group.
Child restraint system suitability for various seating positions
Front passenger seat
Rear seatAirbag manual
on-off switch
ONOFFOutboardCenter
0 Up to 10 kg (22 lb.)
(0 - 9 months)
X
Never put U*1U*3
L1*3X
0+
Up to 13 kg (28 lb.) (0 - 2 years)
X
Never put U*1U*3
L1*3X
I
9 to 18 kg
(20 to 39 lb.) (9 months - 4 years)
Rear-
facing — X
Never put U*1U*3X
Forward- facing — UF*1
II, III
15 to 36 kg
(34 to 79 lb.) (4 - 12 years)
UF*1, 2U*1, 2U*2, 3
L2*2, 3X
Mass groups
Seating
position