ECU LEXUS RX450h 2016 Owner's Manual

531-1. For safe use
1
For safety and security
RX450h_U_OM0E013U ■
Child restraint system with infant
* 5
■
Unoccupied Indicator/
warning light “A I R B A G O N ” a n d “A I R B A G O F F ”
indicator lights “A I R B A G
OFF”
* 6
SRS warning light Off
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 “A I R B A G O N ” a n d “A I R B A G O F F ”
indicator lights “A I R B A G
OFF”
SRS warning light
Off
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

551-1. For safe use
1
For safety and security
RX450h_U_OM0E013U WA R N I N G ■
Front passenger occupant classification system precautions
Observe the following precautions regarding the front passenger occupant classifica-
tion system.
Failure to do so may cause death or serious injury. ●
Wear the seat belt properly. ●
Make sure the front 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” indicator li ght is not illuminated when using the seat
belt extender for the front passenger seat. If the “AIR BAG OFF” indicator light is illu-
minated, disconnect 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 illuminated. If you use th e seat belt extender while the “AIR BAG
OFF” indicator light is illumi nated, 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 pa ssenger seat or equipment (e.g. seatback
pocket). ●
Do not put weight on the front passenger se at 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 passenger seat.

571-1. For safe use
1
For safety and security
RX450h_U_OM0E013UExhaust gas precautions Harmful substance to the human body is contained in exhaust gases if inhaled.WA R N I N G
Exhaust gases contain harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard. ■
Important points while driving ●
Keep the back door closed. ●
If you smell exhaust gases in the vehicle even when the back door is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible. ■
When parking ●
If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
hybrid system. ●
Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior. ●
Do not leave the hybrid system operating in an area with snow build-up, or where it is
snowing. If snowbanks build up around the vehicle while the hybrid system is operat-
ing, exhaust gases may collect and enter the vehicle. ■
Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.

591-2. Child safety
1
For safety and security
RX450h_U_OM0E013U Points to remember ............................................................................................................. .. P. 59
Child restraint system ......................................................................................................... ....P. 61
When using a child restraint system ............................................................................... P. 62
Child restraint system installation method
• Fixed with a seat belt..................................................................................................P. 65
• Fixed with a child restraint LATCH anchor ........................................................P. 71
• Using an anchor bracket (for top tether stra p)............................................... P. 73
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 warnings, as well as the laws and regulations for
child restraint systems. ●
Use a child restraint system until the child becomes large enough to properly
wear the vehicle’s seat belt. ●
Choose a child restraint system that suits your vehicle and is appropriate to
the age and size of the child.Child restraint systems Before installing a child restraint system in the vehicle, there are precautions
that need to be observed, different type s of child restraint systems, as well as
installation methods, etc., written in this manual.
Use a child restraint system when riding with a small child that cannot 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

60 1-2. Child safety
RX450h_U_OM0E013U WA R N I N G ■
When a child is riding
Observe the following precautions.
Failure to do so may result in death or serious injury.●
For effective protection in automobile accidents and sudden stops, a child must be
properly restrained, using a seat belt or child restraint system which is correctly
installed. For installation details, refer to the operation manual enclosed with the child
restraint system. General installation in struction is provided in this manual.●
Lexus strongly urges the use of a proper child restraint system that conforms to the
weight and size of the child, installed on the rear seat. Ac cording to accident statistics,
the child is safer when proper ly restrained in the rear seat than in the front seat.●
Holding a child in your or someone else’s ar ms is not a substitute for a child restraint
system. In an accident, the child can be crushed against the windshield or between
the holder and the interior of the vehicle. ■
Handling the child restraint system
If the child restraint system is not properly fixed in place, the child or other passengers
may be seriously injured or even killed in th e event of sudden braking, sudden swerv-
ing, or an accident. ●
If the vehicle were to receive a strong impact from an accident, etc., it is possible 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 installa tion instructions prov ided with the child
restraint system manufacturer and that the system is properly secured. ●
Keep the child restraint system properly 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 rest raint system, remove it from the vehicle or
store it securely in the luggage compartment.

611-2. Child safety
1
For safety and security
RX450h_U_OM0E013U ■
Types of child restraint system installation methods
Confirm with the operation manual encl osed with the child restraint system
about the installation of the child restraint system.
Child restraint system Installation method Pa g e
Seat belt
attachment P. 6 5
Child restraint
LATCH
anchors
attachment P. 7 1
Anchor brack-
ets (for top
tether strap)
attachment P. 7 3

631-2. Child safety
1
For safety and security
RX450h_U_OM0E013U WA R N I N G ■
When using a child restraint system
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Never install a rear-facing ch ild restraint system on the front passenger seat even if
the “AIR BAG OFF” indicator lig ht 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 ma y be installed on the front passenger seat
only when it is unavoidable. A child restra int 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. ●
A forward-facing child restraint system may
be installed on the front passenger seat only
when it is unavoidable. When installing a for-
ward-facing child restraint system on the front
passenger seat, raise the seatback as much as
possible, move the seat to the rearmost posi-
tion, and raise the seat to the highest position,
even if the “AIR BAG OFF” indicator light is
illuminated.
If the head restraint interferes with the instal-
lation of the child restraint system, and the
head restraint can be removed, remove the
head restraint.
If the head restraint cannot be removed, raise
it to the uppermost position. ●
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 or rear pillars, or
roof side rails from which the SRS side air-
bags or SRS curtain shield airbags deploy
even if the child is seated in the child restraint
system. It is dangerous if the SRS side airbags
and curtain shield airbags inflate, and the
impact could cause death or serious injury to
the child.

651-2. Child safety
1
For safety and security
RX450h_U_OM0E013U A child restraint system for a small ch ild or baby must itself be properly
restrained on the seat with the lap portion of the lap/shoulder belt.
◆ Installing child restraint system using a seat belt (child restraint lock func-
tion belt)
Install the child restraint system in accordance to the operation manual
enclosed with the child restraint system. ■
Rear-facing — Infant seat/convertible seat
Adjust the rear seat
If there is a gap between the child se at and the seatback, adjust the seat-
back angle until good contact is achieved.
Place the child restraint system
on the rear seat facing the rear of
the vehicle.
Run the seat belt through the
child restraint system and insert
the plate into the buckle. Make
sure that the belt is not twisted.
Fully extend the shoulder belt and
allow it to retract to put it in lock
mode. In lock mode, the belt can-
not be extended.Child restraint system fixed with a seat belt 1
2
3
4

66 1-2. Child safety
RX450h_U_OM0E013U
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.
After installing the child restraint syst em, rock it back and forth to ensure
that it is installed securely. (  P. 7 0 )■
Forward-facing — Convertible seat
Adjust the seat 
When using the front passenger seat
If installing the child restraint system to the front passenger seat is unavoid-
able, refer to P. 62 for the front passenger seat adjustment. 
When using the rear seat
If there is a gap between the child se at and the seatback, adjust the seat-
back angle until good contact is achieved.
Remove the head restraint if it
interferes with your child restraint
system. (  P. 1 7 9 )If the head restraint cannot be
removed, raise it to the uppermost
position.
Place the child restraint system
on the seat facing the front of the
vehicle. 5
6
1
2
3

671-2. Child safety
1
For safety and security
RX450h_U_OM0E013U Run the seat belt through the
child restraint system and insert
the plate into the buckle. Make
sure that the belt is not twisted.
Fully extend the shoulder belt and
allow it to retract to put it in lock
mode. In lock mode, the belt can-
not be extended.
While pushing the child restraint
system 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.
If the child restraint has a top tether strap, follow the child restraint manu-
facturer’s operation manual regarding the installation, using the top tether
strap to latch onto the top tether strap anchor. (  P. 7 3 )
After installing the child restraint syst em, rock it back and forth to ensure
that it is installed securely. (  P. 7 0 )4
5
6
7
8