ECU LEXUS NX300h 2015 User Guide

371-1. For safe use
1
For safety and security
NX300h_U_OM78007U WA R N I N G
Observe the following precautions to reduce the risk of injury in the event of sudden
braking, sudden swerving or an accident.
Failing to do so may caus e death or serious injury.■
Wearing a seat belt ●
Ensure that all passengers wear a seat belt. ●
Always wear a seat belt properly. ●
Each seat belt should be used by one person only. Do not use a seat belt for more
than one person at once, including children. ●
Lexus recommends that children be seated in the rear seat and always use a seat belt
and/or an appropriate child restraint system. ●
To achieve a proper seating position, do not recline the seat more than necessary. The
seat belt is most effective when the occupa nts are sitting up straight and well back in
the seats. ●
Do not wear the shoulder belt under your arm.●
Always wear your seat belt low and snug across your hips. ■
Pregnant women
Obtain medical advice and wear the seat belt
in the proper way. (  P. 3 2 )
Women who are pregnant should position the
lap belt as low as possib le over the hips in the
same manner as other occupants, extending
the shoulder belt completely over the shoulder
and avoiding belt contact with the rounding of
the abdominal area.
If the seat belt is not worn properly, not only the
pregnant woman, but also the fetus could suffer
death or serious injury as a result of sudden
braking or a collision.

391-1. For safe use
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For safety and security
NX300h_U_OM78007U WA R N I N G ■
Using a seat belt extender ●
Do not wear the seat belt extender if you can fasten the seat belt without the extender. ●
Do not use the seat belt extender when in stalling a child restraint system because the
belt will not securely hold th e child restraint system, incr easing the risk of death or
serious injury in the event of an accident. ●
The personalized extender may not be safe on another vehicle, when used by another
person, or at a different seating position other than the one originally intended.
NOTICE ■
When releasing a seat belt extender
Press on the buckle release button on the ex tender, not on the seat belt, then, release
the extender from the seat belt buckle. (  P. 4 4 )
This helps prevent damage to the vehicle interior and the extender itself.

411-1. For safe use
1
For safety and security
NX300h_U_OM78007U ◆ SRS side and curtain shield airbags
SRS side airbags
Can help protect the torso of the front seat occupants
SRS curtain shield airbags ●
Can help protect primarily the head of occupants in the outer seats●
Can prevent the occupants from being thrown from the vehicle in the event
of vehicle rollover 4
5

42 1-1. For safe use
NX300h_U_OM78007U Your vehicle is equipped with ADVANCED AIRBAGS designed based on the
US motor vehicle safety standards (FMVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system compon ents diagram above. This information
includes crash severity and occupant information. As the airbags deploy, a
chemical reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the moti on of the occupants.SRS airbag system components
Front passenger airbag
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Side airbags
Curtain shield airbags
Side impact sensors (rear)
SRS warning light
Front passenger occupant classifica-
tion system (ECU and sensors)
Driver airbag Side impact sensors (front)
Seat belt pretensioners and force
limiters
Passenger seat cushion airbag
Driver’s seat position sensor
Driver knee airbag
Driver’s seat belt buckle switch
Front passenger’s seat belt buckle
switch
Front impact sensors
Airbag sensor assembly1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
17

431-1. For safe use
1
For safety and security
NX300h_U_OM78007U WA R N I N G ■
SRS airbag precautions
Observe the following precautions regarding the SRS airbags.
Failure to do so may cause death or serious injury. ●
The driver and all passengers in the vehicle must wear their seat belts properly.
The SRS airbags are supplemental device s to be used with the seat belts.●
The SRS driver airbag deploys with consider able force, and can cause death or seri-
ous injury especially if the driver is very close to the airbag. The National Highway
Traffic Safety Administration (NHTSA) advises:
Since the risk zone for the driver’s airbag is the first 2 - 3 in. (50 - 75 mm) of inflation,
placing yourself 10 in. (250 mm) from your driver airbag provides you with a clear
margin of safety. This distance is measured from the center of the steering wheel to
your breastbone. If you sit less than 10 in. (250 mm) away now, you can change your
driving position in several ways:
• Move your seat to the rear as far as you can while still reaching the pedals com-
fortably.
• Slightly recline the back of the seat. Al though vehicle designs vary, many drivers
can achieve the 10 in. (250 mm) distance, even with the driver seat all the way for-
ward, simply by reclining the back of th e seat somewhat. If reclining the back of
your seat makes it hard to see the road, raise yourself by using a firm, non-slippery
cushion, or raise the seat if your vehicle has that feature.
• If your steering wheel is ad justable, tilt it downward. Th is points the airbag toward
your chest instead of your head and neck.
The seat should be adjusted as recommen ded by NHTSA above, while still maintain-
ing control of the foot pedals, steering whee l, and your view of the instrument panel
controls.

44 1-1. For safe use
NX300h_U_OM78007U WA R N I N G ■
SRS airbag precautions
●
The SRS front passenger airbag also deploy s 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 re strained infants and childre n 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 child 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 seats are safe r for infants and children than the front
passenger seat. (  P. 6 0 )●
If the seat belt extender has been connected
to the front seat belt buckles but the seat belt
extender has not also been fastened to the
latch plate of the seat belt, the SRS front air-
bags will judge that the driver and front pas-
senger are wearing the seat belt even though
the seat belt has not been connected. In this
case, the SRS front airbags may not activate
correctly in a collision, resulting in death or
serious injury in the event of a collision. Be
sure to wear the seat belt with the seat belt
extender.

451-1. For safe use
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For safety and security
NX300h_U_OM78007U WA R N I N G ■
SRS airbag precautions ●
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.
●
Do not allow anyone to kneel on the passen-
ger seat toward the door or put their head or
hands outside the vehicle.

471-1. For safe use
1
For safety and security
NX300h_U_OM78007U WA R N I N G ■
SRS airbag precautions ●
If breathing becomes difficult after the SRS airbags have deployed, open a door or
window to allow fresh air in, or leave the vehicl e if it is safe to do so. Wash off any resi-
due as soon as possible to prevent skin irritation. ●
If the areas where the SRS airbags are stored, such as the steering wheel pad and
front and rear pillar garnishes, are damaged or cracked, have them replaced by your
Lexus dealer. ●
Do not place anything, such as a cushion, on the front passenger’s seat. Doing so will
disperse the passenger’s weight, which prevents the sensor from detecting the pas-
senger’s weight properly. As a result, th e SRS front airbags for the front passenger
may not deploy in the event of a collision. ■
Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifications without
consulting your Lexus dealer. The SRS airb ags may malfunction or deploy (inflate)
accidentally, causing de ath or serious injury.●
Installation, removal, disassembl y and repair of the SRS airbags●
Repairs, modifications, removal or replac ement of the steering wheel, instrument
panel, dashboard, seats or seat upholstery, fr ont, side and rear pillars or roof side rails●
Repairs or modifications of the front fend er, front bumper, or side of the occupant
compartment ●
Installation of a grille guar d (bull bars, kangaroo bar, etc.), snow plows, winches or
roof luggage carrier ●
Modifications to the vehicle’s suspension system ●
Installation of electronic devices such as mobile two-way radios and CD players●
Modifications to your vehicle for a person with a physical disability

491-1. For safe use
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For safety and security
NX300h_U_OM78007U ■
Conditions under which the SRS airbags may deploy (inflate), ot her than a collision
The SRS front airbags and SRS side and curtain shield airbags may also deploy if a seri-
ous impact occurs to the underside of your vehicle. Some examples are shown in the
illustration.
The SRS curtain shield airbags may also deploy under the situations shown in the illustra-
tion.
■
Types of collisions that may not deploy the SRS airbags (SRS front airbags)
The SRS front airbags do not gene rally inflate if the vehicle is involved in a side or rear
collision, if it rolls over, or if it is involved in a low-speed frontal collision. But, whenever a
collision of any type causes sufficient forwar d deceleration of the vehicle, deployment of
the SRS front airbags may occur. ●
Hitting a curb, edge of pavement or hard sur-
face ●
Falling into or jumping over a deep hole ●
Landing hard or falling ●
The angle of vehicle tip-up is marginal. ●
The vehicle skids and hits a curb stone.
●
Collision from the side ●
Collision from the rear ●
Vehicle rollover

511-1. For safe use
1
For safety and security
NX300h_U_OM78007U ■
When to contact your Lexus dealer
In the following cases, the vehicle will re quire inspection and/or repair. Contact your
Lexus dealer as soon as possible. ●
Any of the SRS airbags have been inflated.●
The front of the vehicle is damaged or
deformed, or was involv ed in an accident that
was not severe enough to cause the SRS front
airbags to inflate. ●
A portion of a door or its surrounding area is
damaged or deformed, or the vehicle was
involved in an accident that was not severe
enough to cause the SRS side and curtain
shield airbags to inflate. ●
The pad section of the steering wheel, dash-
board near the front passenger airbag or
lower portion of the instrument panel is
scratched, cracked, or otherwise damaged. ●
The front passenger’s seat cushion surface is
scratched, cracked, or otherwise damaged.
●
The surface of the seats with the side airbag is
scratched, cracked, or otherwise damaged.