2018 LEXUS NX300h run flat

13Pictorial index
LEXUS NX300h Owners Manu-
al_USA_OM78212U Precautions against winter season ............................................................................ P.257
To prevent freezing (windshield wiper de-icer) .................................................. P.273
Precautions against car wash ....................................................................................... P.315
Fuel filler door .......................................................................................................... P.196
Refueling method .............................................................................................................. P .196
Fuel type/fuel tank capacity ...... .................................................................................... P.401
Tires.......................................................................................................................... ..P.336
Tire size/inflation pressure ...........................................................................................P.406
Winter tires/tire chain .................................................................................................... P.25 7
Checking/rotation/tire pressure warning system.............................................. P.336
Coping with flat tires........................................................................................................ P .377
Hood ......................................................................................................................... P. 325
Opening ........................................................................................................................ ....... P.325
Engine compartment cover .........................................................................................P.328
Engine oil ..................................................................................................................... ......... P.402
Coping with overheat ..................................................................................................... P.394
Warning messages .......................................................................................................... P.374
Headlights .................................................................................................................P.18 3
Parking lights/daytime running lights...............................................................P.183
Fog lights....................................................................................................................P .189
Turn signal lights ...................................................................................................... P.176
Tail lights .................................................................................................................... P.183
License plate lights .................................................................................................P.183
Back-up light
Shifting the shift lever to R ...............................................................................................P.1 73
Side marker lights ...................................................................................................P.183 *
:If equipped Light bulbs of the exterior lights for driving
(Replacing method: P.353, Watts: P.407) E
F
G
H
I
J
K
L
M
N
O

2094-5. Using the driving support systems
LEXUS NX300h Owners Manu-
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Driving rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun
or the headlights of oncoming traffic,
shines directly in to the camera sensor
• When the surrounding area is dim, such
as at dawn or dusk, or while at night or in
a tunnel
• After the hybrid system has started the
vehicle has not been driven for a certain
amount of time
• While making a left/right turn and for a
few seconds after makin g a left/right turn
• While driving on a curve and for a few
seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or low-
ered
• If the wheels are misaligned
• If a wiper blade is blocking the camera
sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely
high speeds.
• When driving on a hill
• If the radar sensor or camera sensor is
misaligned●
In some situations such as the following,
sufficient braking force may not be
obtained, preventing the system from
performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained
(brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a
gravel road or other slippery surface
●
Some pedestrians such as the following
may not be detected by the radar sensor
and camera sensor, preventing the sys-
tem from operating properly: • Pedestrians shorter than approximately
3.2 ft. (1 m) or taller than approximately
6.5 ft. (2 m)
• Pedestrians wearing oversized clothing
(a rain coat, long skir t, etc.), making their
silhouette obscure
• Pedestrians who are carrying large bag-
gage, holding an umbrella, etc., hiding
part of their body
• Pedestrians who are bending forward or
squatting
• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle
• Groups of pedestrians which are close
together
• Pedestrians who are wearing white and
look extremely bright
• Pedestrians in the dark, such as at night
or while in a tunnel
• Pedestrians whose clothing appears to
be nearly the same color or brightness as
their surroundings
• Pedestrians near walls, fences, guardrails,
or large objects
• Pedestrians who are on a metal object
(manhole cover, steel plate, etc.) on the
road
• Pedestrians who are walking fast
• Pedestrians who are changing speed
abruptly
• Pedestrians running out from behind a
vehicle or a large object
• Pedestrians who are extremely close to
the side of the vehicle (outside rear view
mirror, etc.) ■
If the PCS warning light flashes or illumi-
nates and a warning message is dis-
played on the multi-information display
The pre-collision system may be temporar-
ily unavailable or there may be a malfunc-
tion in the system.
●
In the following situations, the warning
light will turn off, the message will disap-
pear and the system will become opera-
tional when normal operating conditions
return:
• When the radar sensor or camera sensor
or the area around either sensor is hot,
such as in the sun
• When the radar sensor or camera sensor
or the area around either sensor is cold,
such as in an extremely cold environment
• When a front sensor is dirty or covered

340 6-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U ■
Situations in which the tire pressure
warning system may not operate prop-
erly●
In the following cases, the tire pressure
warning system may not operate prop-
erly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is
not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is
not of the specified size.
• Tire chains etc. are equipped.
• An auxiliary-supported run-flat tire is
equipped.
• If a window tint that affects the radio wave
signals is installed.
• If there is a lot of snow or ice on the vehi-
cle, particularly around the wheels or
wheel housings.
• If the tire inflation pressure is extremely
higher than the specified level.
• If wheel without the tire pressure warning
valve and transmitter is used.
• If the ID code on the tire pressure warn-
ing valves and transmitters is not regis-
tered in the tire pressure warning
computer.●
Performance may be affected in the fol-
lowing situations.
• Near a TV tower, electric power plant,
gas station, radio stat ion, large display,
airport or other faci lity that generates
strong radio waves or electrical noise
• When carrying a portable radio, cellular
phone, cordless phone or other wireless
communication device
●
When the vehicle is parked, the time
taken for the warning to start or go off
could be extended.
●
When tire inflation pressure declines rap-
idly for example when a tire has burst, the warning may not function.
When replacing tires or wheels, tire WARNING■
Caution regarding interference with
electronic devices ●
People with implantable cardiac pace-
makers, cardiac resynchronization
therapy-pacemakers or implantable
cardioverter defibrillators should not
come within 17.7 in. (450 mm) of the
tire pressure warning system initiators.
The radio waves may affect the opera-
tion of such devices.
●
Users of any electrical medical device
other than implantable cardiac pace-
makers, cardiac resynchronization
therapy-pacemakers or implantable
cardioverter defibrillators should con-
sult the manufacturer of the device for
information about its operation under
the influence of radio waves.
Radio waves could have unexpected
effects on the operation of such medi-
cal devices.
Installing tire pressure warning
valves and transmitters

3637-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises 3 Insert the towing eyelet into the
hole and tighten partially by hand.
4 Tighten down the towing eyelet
securely using a wheel nut wrench.
5 Securely attach cables or chains to
the towing eyelet.Take care not to damage the vehicle body.
6 Enter the vehicle being towed and
start the hybrid system.If the hybrid system does not start, turn the
power switch to ON mode.
7 Shift the shift lever to N and release
the parking brake.When the shift lever cannot be shifted:
→ P.174
■
While towing
If the hybrid system is off, the power assist
for the brakes and steering will not function,
marking steering and braking more difficult.
■
Wheel nut wrench
Wheel nut wrench is installed in luggage
compartment. ( → P.378)  Fluid leaks under the vehicle
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the hybrid system
 Engine misfire or misses, stumbling
or running roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when brakingIf you think something is
wrong If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

4178-1. Specifications
LEXUS NX300h Owners Manu-
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Vehicle specifications
*
:Table 1 ⎯ Occupant loading and distri-
bution for vehicle normal load for vari-
ous designated seating capacitiesPneumatic
tire A mechanical device made
of rubber, chemicals, fabric
and steel or other materials,
that, when mounted on an
automotive wheel, provides
the traction and contains
the gas or fluid that sustains
the load
Radial ply
tire A pneumatic tire in which
the ply cords that extend to
the beads are laid at sub-
stantially 90 degrees to the
centerline of the tread
Reinforced
tire A tire designed to operate
at higher loads and at
higher inflation pressures
than the corresponding
standard tire
Section
width The linear distance between
the exteriors of the sidewalls
of an inflated tire, excluding
elevations due to labeling,
decoration, or protective
bands
Sidewall That portion of a tire
between the tread and bead
Sidewall sep-
aration The parting of the rubber
compound from the cord
material in the sidewallTire related
term Meaning
Snow tire A tire that attains a traction
index equal to or greater
than 110, compared to the
ASTM E-1136 Standard
Reference Test Tire, when
using the snow traction test
as described in ASTM F-
1805-00, Standard Test
Method for Single Wheel
Driving Traction in a
Straight Line on Snow-and
Ice-Covered Surfaces, and
which is marked with an
Alpine Symbol ( ) on at
least one sidewall
Test rim The rim on which a tire is fit-
ted for testing, and may be
any rim listed as appropri-
ate for use with that tire
Tread That portion of a tire that
comes into contact with the
road
Tread rib A tread section running cir-
cumferentially around a tire
Tread sepa-
ration Pulling away of the tread
from the tire carcass
Treadwear
indicators
(TWI) The projections within the
principal grooves designed
to give a visual indication of
the degrees of wear of the
tread
Wheel-hold-
ing fixture The fixture used to hold the
wheel and tire assembly
securely during testingTire related
term Meaning