ECU LEXUS NX300h 2020 Workshop Manual

1443-4. Adjusting the steering wheel and mirrors
LEXUS NX300h Owners Manual_USA_M78530_en
To sound the horn, press on or close to
the mark.The height of the rear view mirror can
be adjusted to suit your driving pos-
ture.
Adjust the height of the rear view mir-
ror by moving it up and down.
Responding to the level of brightness
of the headlights of vehicles behind, the
reflected light is automatically
reduced.
Type A
Changing automatic anti-glare func-
tion mode on/off
WARNING
■Caution while driving
Do not adjust the steering wheel while
driving.
Doing so may cause the driver to mis-
handle the vehicle and cause an acci-
dent, resulting in death or serious injury.
■After adjusting the steering wheel
(manual type)
Make sure that the steering wheel is
securely locked.
Otherwise, the steering wheel may move
suddenly, possibly causing an accident,
resulting in death or serious injury.
Sounding the horn
Inside rear view mirror
The rear view mirror’s position can
be adjusted to enable sufficient
confirmation of the rear view.
Adjusting the heig ht of rear view
mirror
WARNING
■Caution while driving
Do not adjust the position of the mirror
while driving.
Doing so may lead to mishandling of the
vehicle and cause an accident, resulting
in death or serious injury.
Anti-glare function

1463-4. Adjusting the steering wheel and mirrors
LEXUS NX300h Owners Manual_USA_M78530_en
1To select a mirror to adjust, press
the switch.
Left
Right 2
To adjust the mirror, press the
switch.
Up
Right
Down
Left
■Mirror angle can be adjusted when
The power switch is in ACCESSORY or
ON mode.
■When using in cold weather
Vehicles with driving position memory:
When used in cold weather during reverse
driving, the door mirror could be frozen and
may not automatically point the mirror sur-
face downward. In this event, remove any
ice and snow from the mirror surface.
■Defogging the mirrors
The outside rear view mirrors can be
cleared using the mirror defoggers. Turn on
the rear window defogger to turn on the
outside rear view mirror defoggers.
(  P.290)
■Auto anti-glare function
When the anti-glare inside rear view mirror
is set to automatic mode, the outside rear
view mirrors will activate in conjunction with
the anti-glare inside rear view mirror to
reduce reflec ted light. (P.144)
■Automatic adjustment of the mirror
angle (vehicles with driving position
memory)
A desired mirror face angle can be entered
to memory and recalled automatically by
Outside rear view mirrors
For safe driving, adjust the mirror
angles to secure visibility before
driving.
WARNING
■When driving the vehicle
Observe the following precautions while
driving.
Failure to do so may result in loss of con-
trol of the vehicle and cause an accident,
resulting in death or serious injury.
●Do not adjust the mirrors while driving.
●Do not drive with the mirrors folded.
●Both the driver and passenger side
mirrors must be extended and prop-
erly adjusted before driving.
■When the mirror defoggers are oper-
ating
Do not touch the rear view mirror sur-
faces, as they can become very hot and
burn you.
Adjustment procedure
A
B
A
B
C
D

1594-1. Before driving
LEXUS NX300h Owners Manual_USA_M78530_en
4
Driving
WARNING
●Do not shift the shift lever to a driving
position while the vehicle is moving
backward.
Doing so can damage the transmission
and may result in a loss of vehicle con-
trol.
●Shifting the shift lever to N while the
vehicle is moving will disengage the
hybrid system.
Engine braking is not available when N
is selected.
●Be careful not to shift the shift lever
with the accelerator pedal depressed.
Shifting the shift lever to any position
other than P or N may lead to unex-
pected rapid acceleration of the vehi-
cle that may cause an accident and
result in death or serious injury.
■If you hear a squealing or scraping
noise (brake pad wear limit indica-
tors)
Have the brake pads checked and
replaced by your Lexus dealer as soon as
possible. Rotor damage may result if the
pads are not replaced when needed.
It is dangerous to drive the vehicle when
the wear limits of the brake pads and/or
those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal
unnecessarily.
If the shift lever is in any position other
than P or N, the vehicle may acceler-
ate suddenly and unexpectedly, caus-
ing an accident.
●In order to prevent accidents due to
the vehicle rolling away, always keep
depressing the brake pedal while
stopped with the “READY” indicator is
illuminated, and apply the parking
brake as necessary.
●If the vehicle is stopped on an incline,
in order to prevent accidents caused
by the vehicle rolling forward or back-
ward, always depress the brake pedal
and securely apply the parking brake
as needed.
●Avoid revving or racing the engine.
Running the engine at high speed
while the vehicle is stopped may cause
the exhaust system to overheat, which
could result in a fire if combustible
material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters,
spray cans, or soft drink cans in the
vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plas-
tic material of glasses to deform or
crack.
• Soft drink cans may fracture, causing the contents to spray over the interior
of the vehicle, and may also cause a
short circuit in the vehicle’s electrical
components.
●Do not leave cigarette lighters in the
vehicle. If a cigare tte lighter is in a
place such as the glove box or on the
floor, it may be lit accidentally when
luggage is loaded or the seat is
adjusted, causing a fire.
●Do not attach adhesive discs to the
windshield or windows. Do not place
containers such as air fresheners on
the instrument panel or dashboard.
Adhesive discs or containers may act
as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if
the curved glass is coated with a met-
allized film such as a silver-colored
one. Reflected sunlight may cause the
glass to act as a lens, causing a fire.

1604-1. Before driving
LEXUS NX300h Owners Manual_USA_M78530_en
WARNING
●Always apply the parking brake, shift
the shift lever to P, stop the hybrid sys-
tem and lock the vehicle.
Do not leave the vehicle unattended
while the “READY” indicator is illumi-
nated.
If the vehicle is parked with the shift
lever in P but the parking brake is not
set, the vehicle may start to move, pos-
sibly leading to an accident.
●Do not touch the exhaust pipes while
the “READY” indicator is illuminated
or immediately after turning the hybrid
system off.
Doing so may cause burns.
■When taking a nap in the vehicle
Always turn the hybrid system off. Other-
wise, if you accidentally move the shift
lever or depress the accelerator pedal,
this could cause an accident or fire due
to hybrid system overheating. Addition-
ally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may col-
lect and enter the ve hicle, leading to
death or a serious health hazard.
■When braking
●When the brakes are wet, drive more
cautiously.
Braking distance increases when the
brakes are wet, and this may cause one
side of the vehicle to brake differently
than the other side. Also, the parking
brake may not securely hold the vehi-
cle.
●If the electronically controlled brake
system does not operate, do not follow
other vehicles closely and avoid hills or
sharp turns that require braking.
In this case, braking is still possible, but
the brake pedal should be depressed
more firmly than usual. Also, the brak-
ing distance will increase. Have your
brakes fixed immediately.
●The brake system consists of 2 or more
individual hydraulic systems; if one of
the systems fails, the other(s) will still
operate. In this case, the brake pedal
should be depressed more firmly than
usual and the braking distance will
increase. Have your brakes fixed
immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessively when
any of the tires is up in the air, or the vehi-
cle is stuck in sand, mud, etc. This may
damage the driveline components or
propel the vehicle forward or backward,
causing an accident.
NOTICE
■When driving the vehicle
●Do not depress the accelerator and
brake pedals at the same time during
driving, as this may restrain the hybrid
system output.
●Do not use the accelerator pedal or
depress the accelerator and brake
pedals at the same time to hold the
vehicle on a hill.
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in
either direction and hold it there for an
extended period of time.
Doing so may damage the power
steering motor.
●When driving over bumps in the road,
drive as slowly as possible to avoid
damaging the wheels, underside of the
vehicle, etc.
■If you get a flat tire while driving
A flat or damaged tire may cause the fol-
lowing situations. Hold the steering
wheel firmly and gradually depress the
brake pedal to slow down the vehicle.
●It may be difficult to control your vehi-
cle.

1624-1. Before driving
LEXUS NX300h Owners Manual_USA_M78530_en
Cargo capacity depends on the total
weight of the occupants.(Cargo capacity) = (Total load capac-
ity) — (Total weight of occupants)
Steps for Determining Correct Load
Limit

(1) Locate the statement “The com-
bined weight of occupants and cargo
should never exceed XXX kg or XXX
lbs.” on your vehicle’s placard.
(2) Determine the combined weight of
the driver and passengers that will be
riding in your vehicle.
(3) Subtract the combined weight of
the driver and passengers from XXX
kg or XXX lbs.
(4) The resulting figure equals the
available amount of cargo and luggage
load capacity.
For example, if the “XXX” amount
equals 1400 lbs. and there will be five
150 lb passengers in your vehicle, the
amount of available cargo and luggage
load capacity is 650 lbs. (1400 − 750
(5 × 150) = 650 lbs.)
(5) Determine the combined weight of
luggage and cargo being loaded on
the vehicle. That weight may not safely
exceed the available cargo and lug-
gage load capacity calculated in Step
4.
(6) If your vehicle will be towing a
trailer, load from your trailer will be
transferred to your vehicle. Consult
this manual to determine how this
reduces the available cargo and lug-
gage load capacity of your vehicle.
( P.164)
Vehicles without towing package:
Lexus does not recommend towing a
WARNING
●Secure all items in the occupant com-
partment.
■When using a roof luggage carrier
(vehicles with roof rails)
Observe the following precautions:
●Place the cargo so that its weight is dis-
tributed evenly between the front and
rear axles.
●If loading long or wide cargo, never
exceed the vehicle overall length or
width. ( P.422)
●Before driving, make sure the cargo is
securely fastened on the roof luggage
carrier.
●Loading cargo on the roof luggage
carrier will make the center of gravity
of the vehicle higher. Avoid high
speeds, sudden starts, sharp turns,
sudden braking or abrupt maneuvers,
otherwise it may result in loss of con-
trol or vehicle rollover due to failure to
operate this vehicle correctly and
result in death or serious injury.
●If driving for a long distance, on rough
roads, or at high sp eeds, stop the vehi-
cle now and then during the trip to
make sure the cargo remains in its
place.
●Do not exceed 176.3 lb. (80 kg) cargo
weight on the roof luggage carrier.
NOTICE
■When loading cargo (vehicles with
moon roof)
Do not set luggage on the moon roof.
Failure to observe so may lead to cause
damage.
Capacity and distribution

1654-1. Before driving
LEXUS NX300h Owners Manual_USA_M78530_en
4
Driving
Contact your Lexus dealer for further
information about additional require-
ments such as a towing kit, etc.
■Matching trailer ball height to trailer
coupler height
No matter which class of tow hitch applies,
for a more safe trailer hookup, the trailer
ball setup must be the proper height for the
coupler on the trailer. Coupler
Trailer ball
■Before towing
Check that the following conditions are
met:
●Ensure that your vehicle’s tires are prop-
erly inflated. ( P.428)
●Trailer tires are inflated according to the
trailer manufacturer’s recommendation.
●All trailer lights work as required by law.
●All lights work each time you connect
them.
●The trailer ball is set at the proper height
for the coupler on the trailer.
●The trailer is level when it is hitched.
Do not drive if the trailer is not level, and
check for improper tongue weight, over-
loading, worn suspension, or other possi-
ble causes.
●The trailer cargo is securely loaded.
●The rear view mirrors conform to all
applicable federal, state/provincial or
local regulations. If they do not, install
rear view mirrors appropriate for towing
purposes.
■Break-in schedule
If your vehicle is new or equipped with any
new power train components (such as an
engine, transmission, differential or wheel
bearing), Lexus recommends that you do
Trailer towing (vehicles with
towing package)
Your vehicle is de signed primarily
as a passenger-and-load-carrying
vehicle. Towing a trailer can have an
adverse impact on handling, per-
formance, braking, durability, and
fuel consumption. For your safety
and the safety of others, you must
not overload your vehicle or trailer.
You must also ensure that you are
using appropriate towing equip-
ment, that the towing equipment
has been installed correctly and
used properly, and that you employ
the requisite driving habits.
Vehicle-trailer stability and braking
performance are affected by trailer
stability, brake performance and
setting, trailer brakes, the hitch and
hitch systems (if equipped).
To tow a trailer safely, use extreme
care and drive the vehicle in accor-
dance with your trailer’s character-
istics and operating conditions.
Lexus warranties do not apply to
damage or malfunction caused by
towing a trailer for commercial pur-
poses.
A
B

1674-1. Before driving
LEXUS NX300h Owners Manual_USA_M78530_en
4
Driving
■GCWR (Gross Combination
Weight Rating)
The maximum allowable gross combi-
nation weight. The gross combination
weight is the sum of the total vehicle
weight (including the occupants, cargo
and any optional equipment installed
on the vehicle) and the weight of the
trailer being towed (including the
cargo in the trailer).
■GVWR (Gross Vehicle Weight
Rating)
The maximum allowable gross vehicle
weight. The gross vehicle weight is the
total weight of the vehicle. When tow-
ing a trailer, it is the sum of the vehicle
weight (including the occupants, cargo
WARNING
●Do not exceed the trailer hitch assem-
bly weight, gross vehicle weight, gross
axle weight and trailer tongue weight
capacities.
●Do not use the dynamic radar cruise
control system when trailer towing.
●Slow down and downshift before
descending steep or long downhill
grades. Do not make sudden down-
shifts while descending steep or long
downhill grades.
●Vehicle-trailer instabil ity is more likely
on steep long downhills. Before
descending steep or long downhill
grades, slow down and downshift. Do
not make sudden downshifts when
descending steep or long downhill
grades. Avoid holding the brake pedal
down too long or applying the brakes
too frequently. This could cause the
brakes to overheat and result in
reduced braking efficiency.
●Do not tow a trailer when the compact
spare tire is installed on your vehicle.
■When towing a trailer
Lexus recommends trailers with brakes
that conform to any applicable federal
and state/provincial regulations.
●If the gross trailer weight exceeds
unbraked TWR, trailer brakes are
required. Lexus recommends trailers
with brakes that conform to all applica-
ble federal and state/provincial regula-
tions.
●Never tap into your vehicle’s hydraulic
system, as this will lower the vehicle’s
braking effectiveness.
●Never tow a trailer without using a
safety chain securely attached to both
the trailer and the vehicle. If damage
occurs to the coupling unit or hitch
ball, there is danger of the trailer wan-
dering into another lane.
NOTICE
■When installing a trailer hitch
Use only the position recommended by
your Lexus dealer. Do not install the
trailer hitch on the bumper; this may
cause body damage.
■Do not directly splice trailer lights
Do not directly splice trailer lights.
Directly splicing trailer lights may dam-
age your vehicle’s electrical system and
cause a malfunction.
Towing related terms

1744-2. Driving procedures
LEXUS NX300h Owners Manual_USA_M78530_en
4-2.Driving procedures
1Check that the parking brake is set.
2 Check that the shift lever is in P.
3 Firmly depress the brake pedal.
and a message will be displayed on the
multi-information display.
If it is not displayed, the hybrid system can-
not be started.
4 Press the power switch shortly and
firmly.
When operating the power switch, one
short, firm press is enough.
It is not necessary to press and hold the
switch.
If the “READY” indicator turns on, the
hybrid system will operate normally.
Continue depressing the brake pedal until
the “READY” indicator is illuminated.
The hybrid system can be started from any
power switch mode.
5Check that the “READY” indicator
is illuminated.
The vehicle will not move when the
“READY” indicator is off.
■If the hybrid system does not start
●The immobilizer system may not have
been deactivated. ( P.75)
Contact your Lexus dealer.
●Check that the shift leve r is securely set in
P. The hybrid system may not start if the
shift lever is displaced out of P. “To Start
Vehicle, Put Shift Lever into P” will be dis-
played on the multi-information display.
●The smart access system with push-but-
ton start may not be operating prop-
erly.( P.411)
■When the ambient temperature is low,
such as during winter driving conditions
When starting the hybrid system, the flash-
ing time of the “READY” indicator may be
long. Leave the vehicle as it is until the
“READY” indicator is steady on, as steady
means the vehicle is able to move.
■Sounds and vibrations specific to a
hybrid vehicle
 P.69
■Electronic key battery depletion
 P.106
■Conditions affecting operation
 P.128
■Note for the entry function
 P.128
■Steering lock function
●After turning the power switch off and
opening and closing the doors, the steer-
ing wheel will be lock ed due to the steer-
ing lock function. Operating the power
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Steering Wheel Lock Press
Power Switch while Turning Wheel” will
be displayed on the multi-information dis-
play.
Power (ignition) switch
Performing the following opera-
tions when carryin g the electronic
key on your person starts the hybrid
system or changes power switch
modes.
Starting the hybrid system

1914-3. Operating the lights and wipers
LEXUS NX300h Owners Manual_USA_M78530_en
4
Driving
function will be disabled.
When any of the following are performed,
the 12-volt battery-saving function is can-
celed once and then reactivated. All the
lights will turn off automatically 20 minutes
after the 12-volt battery-saving function has
been reactivated:
●When the headlight switch is operated
●When a door is opened or closed
■Customization
Settings (e.g. light sens or sensitivity) can be
changed. (Customizable features: P.441)
1 With the headlights on, push the
lever away from you to turn on the
high beams.
Pull the lever toward you to the center
position to turn the high beams off.
2Pull the lever toward you and
release it to flash the high beams
once.
You can flash the high beams with the
headlights on or off.
When the following conditions are met,
while the headlights (low beam) are on,
the cornering lights will additionally
turn on and light up the direction of
movement for the vehicle. This is to
ensure excellent visibility when either
driving at intersections or parking at
night.
The steering wheel is operated
 The turn signal lever is operated
 The shift lever is in R
■Cornering light control
●However, when vehicle speed is 25 mph
(40 km/h) or above, the cornering lights
do not turn on.
●After the lights remain illuminated for 30
minutes, they automatically turn off.
AFS (Adaptive Front-lighting System)
secures excellent visibility at intersec-
tions and on curves by automatically
adjusting the direction of the light axis
of the headlights according to vehicle
speed and the degree of the tire’s angle
as controlled by steering input.
AFS operates at speeds of 6 mph (10
km/h) or higher.
NOTICE
■To prevent 12-volt battery discharge
Do not leave the lights on longer than
necessary when the hy brid system is off.
Turning on the high beam head-
lights
Cornering lights (if equipped)
AFS (Adaptive Front-lighting
System) (if equipped)

1954-3. Operating the lights and wipers
LEXUS NX300h Owners Manual_USA_M78530_en
4
Driving
1 Turns the fog lights off
2 Turns the fog lights on
■Fog lights can be used when
The headlights are on in low beam.
Operating the lever operates
the wipers or washer as follows.
■Intermittent windshield wipers with
interval adjuster (if equipped)
Type A
1 Off
Fog light switch
When in difficult driving conditions,
such as in rain and fog, turn on the
front fog lights to secure front visi-
bility and turn on the rear fog lights
to notify following vehicles the exis-
tence of your vehicle.
Operating instructions
NOTICE
■To prevent 12-volt battery discharge
Do not leave the lights on longer than
necessary when the hy brid system is off.
Windshield wipers and
washer
Operating the lever can switch
between automatic operation and
manual operation, or can use the
washer.
NOTICE
■When the windshield is dry
Do not use the wipers, as they may dam-
age the windshield.
Operating the wiper lever