2019 LEXUS NX300H stop start

3917-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
ACCESSORY mode.
3 Firmly depress the brake pedal and
check that message shown on the
multi-information display.
4 Press the power switch.
In the event that the hybrid system still can-
not be operated, contact your Lexus
dealer.
■Stopping the hybrid system
Set the parking brake, shift the shift lever to
P and press the power switch as you nor-
mally do when stopping the hybrid system.
■Electronic key battery
As the above procedure is a temporary
measure, it is recomme nded that the elec-
tronic key battery be replaced immediately
when the battery is depleted.
■Alarm
Using the mechanical key to lock the doors
will not set the alarm system. If a door is
unlocked using the mechanical key when
the alarm system is set, the alarm may be
triggered.
■Changing power switch modes
Release the brake pe dal and press the
power switch in step 3 above.
The hybrid system does not start and modes
will be changed each time the switch is
pressed. ( P.170)

3977-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
coolant is unavailable.
6 Start the hybrid system and turn the
air conditioning system on to check
that the radiator cooling fans oper-
ate and to check for coolant leaks
from the radiator or hoses.
The fans operate when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fans are oper-
ating by checking the fan sound and air
flow. If it is difficult to check these, turn the
air conditioning system on and off repeat-
edly.
(The fans may not oper ate in freezing tem-
peratures.)
7 If the fans are not operating:
Stop the hybrid system immediately
and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the
nearest Lexus dealer.
8 Check if “Engine Coolant Temp
High” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Lexus dealer.
If “Hybrid System Overheated” is
shown on the multi-information dis-
play
1 Stop the vehicle in a safe place.
2 Stop the hybrid system and care-
fully lift the hood.
3 After the hybrid system has cooled
down, inspect the hoses and radia-
tor core (radiato r) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir “FULL” line
“LOW” line
5 Add coolant if necessary.
A
B
A
B
C

3987-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_enWater can be used in an emergency if
coolant is unavailable.
6
After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check if “Hybrid System Over-
heated” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact your
Lexus dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be driven
normally.
However, if the message appears again fre-
quently, contact your Lexus dealer.
WARNING
■To prevent an accident or injury when
inspecting under the hood of your
vehicle
Observe the following precautions.
Failure to do so may result in serious
injury such as burns.
●If steam is seen coming from under the
hood, do not open the hood until the
steam has subsided. The engine com-
partment may be very hot.
●After the hybrid system has been
turned off, check that the “READY”
indicator is off. When the hybrid sys-
tem is operating, the gasoline engine
may automatically start, or the cooling
fan may suddenly operate even if the
gasoline engine stops. Do not touch or
approach rotating parts such as the
fan, which may lead to fingers or cloth-
ing (especially a tie, a scarf or a muf-
fler) getting caught, resulting in serious
injury.
●Do not loosen the coolant reservoir
cap while the hybrid system and radia-
tor are hot.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine/power control
unit coolant
Add coolant slowly after the hybrid sys-
tem has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too
quickly can cause dama ge to the hybrid
system.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●Do not use any coolant additive.

3997-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
1 Stop the hybrid system. Shift the
shift lever to P and set the parking
brake.
2 Remove the mud, snow or sand
from around the front wheels.
3 Place wood, stones or some other
material under the front wheels to
help provide traction.
4 Restart the hybrid system.
5 Shift the shift lever to D or R,
release the parking brake. Then,
while exercising caution, depress
the accelerator pedal.
■When it is difficult to free the vehicle
Press to turn off TRAC. ( P.250)
If the vehicle becomes stuck
Carry out the following proce-
dures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Recovering procedure
WARNING
■When attempting to free a stuck vehi-
cle
If you choose to push the vehicle back
and forth to free it, make sure the sur-
rounding area is clear to avoid striking
other vehicles, obje cts or people. The
vehicle may also lunge forward or lunge
back suddenly as it becomes free. Use
extreme caution.
■When shifting the shift lever
Be careful not to shif t the shift lever with
the accelerator pedal depressed.
This may lead to un expected rapid accel-
eration of the vehicle that may cause an
accident resulting in death or serious
injury.
NOTICE
■To avoid damage to the hybrid trans-
mission and other components
●Avoid spinning the front wheels and
depressing the accelerator pedal
more than necessary.
●If the vehicle remains stuck even after
these procedures are performed, the
vehicle may require towing to be freed.

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

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

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