2018 LEXUS NX300h ECU

411-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security
SRS warning light
Front passenger’s seat belt reminder light 
For the U.S.A.
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light 
For Canada
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator lightFront 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 acti-
vates or deactivates the devi ces for the front passenger.
System components
A
B
C
D
E
F

431-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security ■
Child restraint system with infant *5
■
Unoccupied Indicator/warning
light “AIR BAG ON” and “AIR BAG OFF” indica-
tor lights “AIR BAG OFF” *6
SRS warning light Off
Front passenger’s seat belt reminder light Off *2
or flashing *3
Devices Front passenger airbag Deactivated
Side airbag on the front passenger seat
Activated
Curtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger
side Deactivated
Front passenger’s seat belt pretensioner and
force limiter Activated
Indicator/warning
light “AIR BAG ON” and “AIR BAG OFF” indica-
tor lights “AIR BAG OFF”
SRS warning light
Off
Front passenger’s seat belt reminder light
Devices Front passenger airbag Deactivated
Side airbag on the front passenger seat
Activated
Curtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger
side Deactivated
Front passenger’s seat belt pretensioner and
force limiter Activated

451-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security WARNING■
Front passenger occupant classifica-
tion system precautions
Observe the following precautions
regarding the front passenger occupant
classification system. Failure to do so may
cause death or serious injury. ●
Wear the seat belt properly.●
Make sure the fron t passenger’s seat
belt plate has not been left inserted
into the buckle before someone sits in
the front passenger seat.●
Make sure the “AIR BAG OFF” indi-
cator light is not illuminated when
using the seat belt extender for the
front passenger seat. If the “AIR BAG
OFF” indicator light is illuminated, dis-
connect the extender tongue from the
seat belt buckle, and reconnect the
seat belt. Reconnect the seat belt
extender after making sure the “AIR
BAG ON” indicator light is illumi-
nated. If you use the seat belt extender
while the “AIR BAG OFF” indicator
light is illuminated, the SRS airbags for
the front passenger will not activate,
which could cause death or serious
injury in the event of a collision.●
Do not apply a heavy load to the front
passenger seat or equipment (e.g.
seatback pocket).
●
Do not put weight on the front passen-
ger seat by putting your hands or feet
on the front passenger seat seatback
from the rear passenger seat.
●
Do not let a rear passenger lift the
front passenger seat with their feet or
press on the seatback with their legs.
●
Do not put objects under the front pas-
senger seat. ●
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 excessively
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 illuminated. 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 co rrectly. If the “AIR
BAG OFF” indicator still remains illu-
minated, either ask the passenger 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 for-
ward-facing child re straint system on
the front passenger seat, install the
child restraint system on the front pas-
senger seat in the proper order.
( → P.50)
●
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 pas-
senger occupant clas sification system.
In this case, contact your Lexus dealer
immediately.
●
Child restraint systems installed on the
rear seat should not contact the front
seatbacks.
●
Do not use a seat accessory, such as a
cushion and seat cover, that covers the
seat cushion surface.

471-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security
Points to remember: → P.47
Child restraint system: → P.49
When using a child restraint system on
a passenger seat: → P.50
When using a child restraint system on
a rear seat: → P.51
Child restraint system installation
method
• Fixed with a seat belt: → P.51
• Fixed with a child restraint LATCH
anchor: → P.55
• Using an anchor bracket (for top
tether strap): → P.57
The laws of all 50 states of the U.S.A.
as well as Canada now require the use of child restraint systems.
 Prioritize and observe the warn-
ings, as well as the laws and regula-
tions for child restraint systems.
 Choose a child restraint system that
suits your vehicle and is appropriate
to the age and size of the child.
 Use a child restraint system appro-
priate for the child until the child
becomes large enough to properly
wear the vehicle’s seat belt.Child restraint systems Before installing a child restraint
system in the vehicle, there are pre-
cautions that need to be observed,
different types of child restraint sys-
tems, as well as installation meth-
ods, etc., written in this manual.
 Use a child restraint system when
riding with a small child that can-
not properly use a seat belt. For
the child’s safety, install the child
restraint system to a rear seat. Be
sure to follow the installation
method that is in the operation
manual enclosed with the
restraint system.
Table of contents
Points to remember WARNING■
When a child is riding
Observe the following precautions. Fail-
ure to do so may result in death or seri-
ous injury. ●
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. ●
Lexus strongly ur ges the use of a
proper child restrain t system that con-
forms to the size of the child, installed
on the rear seat. According to acci-
dent statistics, the child is safer when
properly restrained in the rear seat
than in the front seat.
●
Holding a child in your or someone
else’s arms is not a substitute for a child
restraint system. In an accident, the
child can be crushe d against the wind-
shield or between the holder and the
interior of the vehicle.
●
Place one child to a child restraint sys-
tem and then secure the child with the
harness of the child restraint system.

48 1-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U WARNING■
Handling the child restraint system
If the child restraint system is not prop-
erly fixed in place, the child or other pas-
sengers may be seriou sly injured or even
killed in the event of sudden braking, sud-
den swerving, or an accident. ●
If the vehicle were to receive a strong
impact from an accident, etc., it is pos-
sible that the child restraint system has
damage that is not readily visible. In
such cases, do not reuse the restraint
system.●
Make sure you have complied with all
installation instruct ions provided with
the child restrain t system manufac-
turer and that the system is properly
secured.●
Keep the child restraint system prop-
erly secured 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 lug-
gage compartment.

491-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security ■
Types of child restraint system installation methods
Confirm with the operation manual enclosed with the child restraint system about
the installation of the child restraint system.
Child restraint system Installation method Page
Seat belt attachment P.51
Child restraint
LATCH anchors
attachment P.55
Anchor brackets (for
top tether strap)
attachment P.57

511-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security
A child restraint system for a small
child or baby must itself be properly
restrained on the seat with the lap por-
tion of the lap/shoulder belt. ■
Installing child restraint system
using a seat belt (child restraint
lock function belt)
Install the child restraint system in
accordance to the operation manual
enclosed with the child restraint sys-
tem. ■
Rear-facing — Infant seat/convert-
ible seat
1 Adjust the seatback If there is a gap between the child seat and
the seatback, adjust the seatback until
good contact is achieved.WARNING●
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 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 dangerous if the SRS side
and curtain shield airbags inflate, and
the impact could cause death or seri-
ous injury to the child.●
When a booster seat is installed,
always ensure that th e shoulder belt is
positioned across the center of the
child’s shoulder. The belt should be
kept away from the child’s neck, but
not so that it could fall off the child’s
shoulder.
When using a child restraint sys-
tem on a rear seat WARNING■
When installing a child restraint sys-
tem
Observe the following precautions. Fail-
ure to do so may result in death or seri-
ous injury. ●
Use child restraint system suitable to
the age and size of the child and install
it to the rear seat.
●
If the driver’s seat interferes with the
child restraint system and prevents it
from being attached correctly, attach
the child restraint system to the right-
hand rear seat. ●
Adjust the front passe nger seat so that
it does not interfere with the child
restraint system.
●
Do not allow the child to lean his/her
head or any part of his/her body
against the door or th e area of the seat,
rear pillars or roof side rails from which
the SRS curtain shield airbag deploys
even if the child is seated in the child
restraint system. It is dangerous if the
SRS curtain shield airbag inflates, and
the impact could cause death or seri-
ous injury to the child.
Child restraint system fixed with
a seat belt

52 1-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 2 Place the child restraint system on
the rear seat facing the rear of the
vehicle.
3 Run the seat belt through the child
restraint system and insert the plate
into the buckle. Make sure that the
belt is not twisted.
4 Fully extend the shoulder belt and
allow it to retract to put it in lock
mode. In lock mode, the belt cannot
be extended.
5 While pushing the child restraint
system down into the rear seat,
allow the shoulder belt to retract until the child restraint system is
securely in place. After the shoulder belt has retracted to a
point where there is no slack in the belt,
pull the belt to check that it cannot be
extended.
6 After installing the child restraint
system, rock it back and forth to
ensure that it is installed securely. ■
Forward-facing — Convertible seat
1 Adjust the seatback If there is gap between the child seat and
the seatback, adjust the seatback until
good contact is achieved.
2 If the head restraint interferes with
the child restraint system installa-
tion and the head restraint can be
removed, remove the head
restraint. ( → P.137)