
444What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.388)
If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.388)
Is the electronic key battery weak or
depleted? ( P.349)
Is the power switch in ON mode?
When locking the doors, turn the
power switch off. ( P.170)
Is the electronic key left inside the
vehicle?
When locking the doors, make sure
that you have the electronic key on
your person.
The function may not operate prop- erly due to the condition of the radio
wave. (
P.121)
Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the child-
protector lock. ( P.107)
Did you press the power switch
while firmly depressing the brake
pedal? ( P.168)
Is the shift lever in P? ( P.168)
Is the electronic key anywhere
detectable inside the vehicle?
( P.120)
Is the steering wheel unlocked?
( P.169)
Is the electronic key battery weak or
depleted?
In this case, the hybrid system can
be started in a temporary way.
( P.390)
Is the 12-volt battery discharged?
( P.392)
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not oper-
ate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
If you think something is wrong
The hybrid system does not start

445What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en445What to do if... (Troubleshooting)
Is the power switch in ON mode?
If you cannot release the shift lever
by depressing the brake pedal with
the power switch in ON mode
( P.174)
It is locked automatically to prevent
theft of the vehicle. ( P.169)
Is the window lock switch pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the window lock switch
is pressed. ( P.143)
The auto power off function will be
operated if the vehicle is left in
ACCESSORY or ON mode (the
hybrid system is not operating) for a
period of time. ( P.170)
The seat belt reminder light is flash-
ing
Are the driver and the passengers wearing the seat belts? (
P.371)
The parking brake indicator is on
Is the parking brake released?
( P.177)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.367, 376)
Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm
sounds. ( P.71)
To stop the alarm, turn the power
switch to ON mode or start the hybrid
system.
Is the message displayed on the
multi-information display?
Check the message on the multi-
information display. ( P.376)
When a warning light turns on or a
warning message is displayed, refer
to P.367, 376.
The shift lever cannot be shifted
from P even if you depress the
brake pedal
The steering wheel cannot be
turned after the hybrid system is
stopped
The windows do not open or
close by operating the power
window switches
The power switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed

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

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

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

459What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en459Alphabetical Index
Warning messages ..................................... 376
Washer Checking ....................................................... 333
Low washer fluid warning message333, 376
Preparing and checking before winter ......................................................................... 256
Switch .....................................................188, 193
Washing and waxing....................................312
Weights Cargo capacity..................... 155, 158, 402
Load limits ..................................................... 402
Weights .......................................................... 402
Wheels ............................................................. 346 Replacing wheels....................................... 346
Size................................................................... 408
Window glasses ............................................. 142
Window lock switch .....................................143
Windows Power windows............................................ 142
Rear window defogger .......................... 267
Washer ..................................................188, 193
Windshield wiper de-ice r .......................... 271
Windshield wipers Intermittent windshield wipers ............. 188
Rain-sensing windshield wipers.......... 190
Winter driving tips....................................... 256
Wireless charger .........................................288
Wireless remote control key ..................... 101 Battery-saving function ..............................121
Locking/Unlocking ..................................... 101
Panic mode.....................................................102
Replacing the battery............................... 349
For information regarding the equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Audio/visual system
· Navigation system
· Lexus parking assist monitor
· Panoramic view monitor
· Lexus Enform