2019 LEXUS NX300H heater

3166-1. Maintenance and care
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Clean the air intake vents by the follow-
ing procedures to prevent dust from
accumulating in them, or to prevent
them from clogging.
There are air intake vents on the both sides
of the seats.
■Cleaning the air intake vents
1 Remove the dust from the vents
with a vacuum cleaner etc.
Clean the vents of the both sides.
2Start the hybrid system and check
that the warning message on the
multi-information display disap-
pears.
NOTICE
■Preventing damage to leather sur-
faces
Observe the following precautions to
avoid damage to and deterioration of
leather surfaces:
●Remove any dust or dirt from leather
surfaces immediately.
●Do not expose the vehicle to direct
sunlight for extended periods of time.
Park the vehicle in the shade, espe-
cially during summer.
●Do not place items made of vinyl, plas-
tic, or containing wax on the uphol-
stery, as they may stick to the leather
surface if the vehicle interior heats up
significantly.
■Water on the floor
Do not wash the vehicle floor with water.
Vehicle systems such as the audio system
may be damaged if water comes into
contact with electrical components such
as the audio system above or under the
floor of the vehicle. Water may also
cause the body to rust.
■When cleaning the inside of the wind-
shield (vehicles with Lexus Safety
System+)
Do not allow glass cleaner to contact the
lens. Also, do not touch the lens.
(  P.198)
■Cleaning the inside of the rear win-
dow
●Do not use glass cleaner to clean the
rear window, as this may cause dam-
age to the rear window defogger
heater wires or antenna. Use a cloth
dampened with lukewarm water to
gently wipe the window clean. Wipe
the window in strokes running parallel
to the heater wires or antenna.
●Be careful not to scratch or damage
the heater wires or antenna.
■Cleaning the front side windows
Do not use any compound or abrasive
product (e.g., glass cleaner, detergent,
wax) to clean the windows. It may dam-
age the coating.
Cleaning the air intake vents

3797-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
the air intake vents of the hybrid battery
(traction battery) are not dirty, have the
vehicle inspected by your Lexus dealer.
●If the following messages are shown,
there may be a malfunction.
Immediately stop the vehicle in a safe
place and contact your Lexus dealer.
Continuing to drive the vehicle may be
dangerous.
• “Oil Pressure Low”
• “Charging System Malfunction”
■Warning buzzer
 P.374
 Stop the vehicle in a safe place on a
hard, flat surface.
 Set the parking brake.
 Shift the shift lever to P.
 Stop the hybrid system.
 Turn on the emergency flashers.
( P.360)
NOTICE
■“High Power Consumption Partial
Limit On AC/Heater Operation” is
frequently shown
There is a possible malfunction relating
to the charging system or the 12-volt bat-
tery may be deteriorating. Have the vehi-
cle inspected by your Lexus dealer.
■“Aux Battery Low” is frequently
shown
The 12-volt battery may have deterio-
rated. As the battery may discharge in
this state when left unattended, have the
battery inspected by your Lexus dealer.
If you have a flat tire
Your vehicle is equipped with a
spare tire. The flat tire can be
replaced with the spare tire.
For details about tires: P.337
WARNING
■If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat
tire can damage the tire and the wheel
beyond repair, which could result in an
accident.
Before jacking up the vehicle

4168-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Glossary of tire terminology
Tire related termMeaning
Cold tire
inflation
pressure
Tire pressure when the vehi-
cle has been parked for
three hours or more, or has
not been driven more than 1
mile or 1.5 km under that
condition
Maximum
inflation
pressureThe maximum cold inflated
pressure to which a tire may
be inflated, shown on the
sidewall of the tire
Recom-
mended
inflation
pressureCold tire inflation pressure
recommended by a manu-
facturer
Accessory
weight
The combined weight (in
excess of those standard
items which may be
replaced) of transmission,
power steering, power
brakes, power windows,
power seats, radio and
heater, to the extent that
these items are available as
factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehi-
cle with standard equip-
ment, including the
maximum capacity of fuel,
oil and coolant, and if so
equipped, air conditioning
and additional weight
optional engine
Maximum
loaded vehi-
cle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options
weight
Normal
occupant
weight150 lb. (68 kg) times the
number of occupants speci-
fied in the second column of
Table 1
* that follows
Occupant
distribution
Distribution of occupants in
a vehicle as specified in the
third column of Table 1
*
below
Production
options
weight
The combined weight of
installed regular production
options weighing over 5 lb.
(2.3 kg) in excess of the
standard items which they
replace, not previously con-
sidered in curb weight or
accessory weight, including
heavy duty brakes, ride lev-
elers, roof rack, heavy duty
12-volt battery, and special
trim
Rim
A metal support for a tire or
a tire and tube assembly
upon which the tire beads
are seated
Rim diame-
ter
(Wheel
diameter)
Nominal diameter of the
bead seat
Rim size des-
ignationRim diameter and width
Tire related termMeaning

448Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Brake Brake Hold ..................................................... 179
Fluid .................................................................. 407
Parking brake ................................................ 177
Regenerative braking ................................. 62
Warning light ...............................................368
Brake assist .................................................... 249
Brake Hold ....................................................... 179
Break-in tips...................................................... 151
Brightness control Instrument panel light control ................ 83
BSM (Blind Spot Monitor)......................... 241 Blind Spot Monitor function................. 243
Rear Cross Traffic Alert function....... 245
BSM (Blind Spot Monitor) main switch241
C
Card key .......................................................... 100
Care Aluminum wheels ........................................ 312
Exterior .............................................................315
Interior ...............................................................315
Seat belts..........................................................315
Cargo capacity.........................155, 158, 402
Cargo hooks ................................................. 282
Cargo net hooks .......................................... 282
Chains .............................................................. 257
Child restraint system....................................47 Booster seats installation .......................... 53
Convertible seats installation.................. 52
Front passenger occupant classification system ............................................................... 41
Infant seats installation .................................. 51
Installing CRS with LATCH anchors . 55
Installing CRS with seat belts.................... 51
Installing CRS with top tether strap..... 57
LATCH anchors ........................................... 55 Child safety ....................................................... 46
12-volt battery precautions ...... 335, 395
Airbag precautions ...................................... 37
Back door precautions ............................ 108
Child restraint system ................................. 47
How your child should wear the seat belt............................................................................. 28
Installing child restraints............................. 47
Moon roof precautions............................ 146
Power window lock switch .....................143
Power window precautions ...................143
Rear door child-protectors ................... 107
Removed key battery precautions... 350
Seat belt extender precautions.............. 28
Seat belt precautions .................................. 46
Seat heater precautions.......................... 273
Child-protectors............................................107
Cleaning ..................................................312, 315 Aluminum wheels ........................................312
Exterior..............................................................312
Interior .............................................................. 315
Seat belts ......................................................... 315
Clock ................................................................ 286
Compass .......................................................... 301
Condenser ..................................................... 332
Console box ..................................................280
Consumption screen .................................... 93
Coolant Capacity ........................................................ 405
Checking ........................................................ 331
Preparing and checking before winter..........................................................................256
Warning light .............................................. 368
Cooling system...............................................331 Hybrid system overheating ................. 396
Cornering lights ............................................ 184
Cruise control Dynamic radar cruise control with full-
speed range ................................................ 217
Cup holders ...................................................280
Curtain shield airbags .................................. 32
Customizable features ................................ 421

450Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Emergency, in case of If a warning buzzer sounds .................. 367
If a warning light turns on ...................... 367
If a warning message is displayed..... 376
If the 12-volt battery is discharged .... 392
If the electronic key does not operate properly.......................................................389
If the fuel filler door cannot be opened .........................................................................389
If the hybrid system will not start ........ 387
If you have a flat tire .................................. 379
If you lose your keys................................ 388
If you think something is wrong .........365
If your vehicle becomes stuck.............399
If your vehicle has to be stopped in an
emergency ................................................360
If your vehicle needs to be towed ..... 362
If your vehicle overheats ........................396
Energy monitor ............................................... 93
Engine Accessory mode .........................................170
Compartment ............................................. 328
Engine switch................................................ 168
Hood................................................................ 326
How to start the hybrid system ........... 168
Identification number ...............................403
If your vehicle has to be stopped in an
emergency ................................................360
Ignition switch (power switch) ............. 168
Overheating.................................................396
Power switch ................................................ 168
Engine compartment cover .................... 329
Engine coolant Capacity .........................................................405
Checking .........................................................331
Preparing and checking before winter......................................................................... 256
Warning light ...............................................368
Engine coolant temperature gauge ........79 Engine oil
Capacity ........................................................ 404
Checking .......................................................329
Warning light .............................................. 368
Engine switch ................................................. 168
EPS (Electronic Power Steering) Function .......................................................... 249
Warning light .............................................. 369
EV drive mode................................................. 171
EV indicator ...................................................... 62
Event data recorder (E DR) ............................7
F
Flat tire ............................................................. 379
Tire pressure warning system .............339
Floor mats .......................................................... 24
Fluid Brake ................................................................407
Transmission................................................ 406
Washer ...........................................................333
Fog lights Replacing light bulbs ............................... 355
Switch................................................................188
Front passenger occupant classification system ................................................................ 41
Front passenger’s seat belt reminder light ............................................................................ 371
Front seat heaters.........................................274
Front seats ........................................................126 Adjustment ......................................................126
Cleaning .......................................................... 315
Correct driving posture ............................ 25
Driving position memory .........................132
Head restraints............................................. 135
Power easy access system .....................132
Seat heaters .................................................. 274
Seat position memory ...............................132

451What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en451Alphabetical Index
Front side marker lights Light switch .....................................................182
Replacing light bulbs................................356
Wattage..........................................................409
Front turn signal lights Replacing light bulbs................... 355, 356
Turn signal lever ........................................... 176
Wattage..........................................................409
Fuel Capacity .........................................................403
Fuel gauge ....................................................... 79
Gas station information..........................460
Information ..................................................... 410
Refueling ......................................................... 195
Type..................................................................403
Warning light ................................................. 371
Fuel filler door .................................................195 Refueling ......................................................... 195
When the fuel filler door cannot be opened ........................................................389
Fuses ...................................................................351
G
Garage door opener ................................. 296
Gas station information ............................ 460
Gauges ................................................................79
Glove box .......................................................280
Glove box light .............................................280
Grocery bag hooks .................................... 283
H
Head restraints ...............................................135
Head-up display.............................................. 89
Headlights ........................................................182 Automatic headlight leveling ................ 183
Automatic High Beam ............................. 185
Light switch .................................................... 182
Replacing light bulbs ............................... 355
Heated steering wheel ...............................274
Heaters Automatic air conditioning system ...266
Heated steering wheel ............................ 273
Outside rear view mirrors..................... 267
Seat heaters .................................................. 274
High mounted stoplight Replacing light bulb ................................. 355
Hill-start assist control ............................... 250
Hood ................................................................. 326 Open................................................................326
Hooks Cargo hooks................................................282
Retaining hooks (floor mat) ..................... 24
Horn ................................................................... 138
Hybrid battery (traction battery) Location ............................................................. 64
Specification ................................................ 404
Hybrid battery air vent ................................. 66
Hybrid system .................................................... 61 Emergency shut off system...................... 67
Energy monitor/consumption screen93
EV drive mode............................................... 171
High voltage components ....................... 64
Hybrid System Indicator ........................... 82
Hybrid system precautions...................... 64
Hybrid vehicle driving tips ....................254
If the hybrid system will not start ........387
Overheating ................................................ 396
Power switch................................................. 168
Regenerative braking ................................. 62
Starting the hybrid system ...................... 168
Vehicle proximity noti fication system. 63

455What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en455Alphabetical Index
R
Radar cruise control (dynamic radar cruise control with full-speed range)............... 217
Radiator ........................................................... 332
Rear Cross Traffic Alert ........................... 245
Rear seat Folding down the rear seatbacks........128
Rear side marker lights Light switch .....................................................182
Replacing light bulbs................................355
Rear turn signal lights Replacing light bulb..................................355
Turn signal lever ........................................... 176
Rear view mirror Inside rear view mirror............................. 138
Outside rear view mirrors ..................... 140
Rear window defogger ..............................267
Rear window wiper.......................................193
Refueling ...........................................................195 Capacity .........................................................403
Fuel types.......................................................403
Opening the fuel tank cap ..................... 195
When the fuel filler door cannot be opened ........................................................389
Regenerative braking ................................... 62
Remote Touch .............................................. 262
Replacing Electronic key battery.............................. 349
Fuses ..................................................................351
Light bulbs.....................................................355
Tires .................................................................. 379
Reporting safety defects for U.S. owners .......................................................................... 432
Resetting the message indicating mainte- nance is required ........................................319
Road accident cautions ............................... 65
S
S-FLOW mode .............................................. 271
Safety Connect............................................. 304
Seat belts............................................................ 26 Adjusting the seat belt shoulder anchor height .................................................................31
Automatic Locking Retractor................. 28
Child restraint system installation ......... 47
Cleaning and maintaining the seat belt ........................................................................... 315
Emergency Locking Retractor .............. 28
How to wear your seat belt ..................... 27
How your child should wear the seat belt ............................................................................. 28
Pregnant women, proper seat belt use ............................................................................. 27
Reminder light and buzzer ......... 371, 372
Seat belt extender......................................... 28
Seat belt instructions for Canadian own- ers ................................................................... 432
Seat belt pretensioners ................................31
SRS warning light...................................... 369
Seat heaters ................................................... 273
Seat position memory..................................132
Seat ventilators ............................................. 275
Seating capacity............................................ 158
Seats Adjustment ............................................126, 127
Adjustment precautions ................ 126, 128
Child seats/child restraint system installa-tion .................................................................... 47
Cleaning .......................................................... 315
Driving position memory .........................132
Folding down the rear seatbacks ....... 128
Front seat heaters ...................................... 274
Head restraint ............................................... 135
Power easy access system .....................132
Properly sitting in the seat ........................ 25
Rear seat heaters ....................................... 274
Seat position memory ...............................132
Seat ventilators ............................................ 275

456Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Sensor Automatic High Beam system............. 185
BSM (Blind Spot Monitor) ................... 243
Inside rear view mirror..............................139
Intuitive parking assist...............................227
Kick sensor........................................................112
Radar sensor..................................................199
Rain-sensing windshield wipers............ 191
Service plug ...................................................... 64
Service reminder message .......................319
Shift lever .......................................................... 173
Shift lock system............................................. 174
Side airbags ...................................................... 32
Side doors........................................................ 104
Side marker lights Light switch .....................................................182
Replacing light bulbs................... 355, 356
Wattage..........................................................409
Side mirrors .................................................... 140 Adjusting and folding ............................... 140
Blind Spot Monitor (BSM) ..................... 241
Heaters ........................................................... 267
Side turn signal lights Replacing light bulbs................................355
Turn signal lever ........................................... 176
Smart access system with push-button start...................................................................120Antenna location..........................................120
Entry functions....................................104, 109
Starting the hybrid system...................... 168
Warning message..................................... 376
Snow tires ....................................................... 256
Spare tire Inflation pressure....................................... 408
Storage location ........................................ 380 Spark plug ...................................................... 406
Specifications ................................................ 402
Speedometer ....................................................79
Sport mode .................................................... 248
Steering wheel
Adjustment ......................................................137
Heated steering wheel ............................ 273
Power easy access system .....................132
Stop lights Replacing light bulbs ............................... 355
Storage feature ............................................ 279
Storage precautions................................... 279
Stuck If the vehicle becomes stuck ............... 399
Sun visors ........................................................ 286
Sunglass holder ..............................................281
Switch ASC (Active Sound Control) dial........ 181
Automatic High Beam switch .............. 185
Brake hold switch ........................................179
BSM (Blind Spot Monitor) main switch............................................................................241
Cruise control switch................................. 217
Door lock switch ......................................... 106
Driving mode select switch ..................248
Driving position memory switches .....132
Emergency flashers switch .................. 360
EV drive mode switch................................ 171
Fog light switch ............................................188
Garage door opener switches...........296
Heated steering wheel ............................ 273
HUD (Head-up display) switches .......89
Ignition switch ............................................... 168
Intuitive parking assist switch ............... 227
LDA switch ...................................................... 211