2020 LEXUS NX300h warning light

4067-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_enwarning system. Also, if you replace the
compact spare tire after the tire pressure
warning light comes on, the light remains
on.
■When the compact spare tire is
equipped
The vehicle becomes lower when driving
with the compact spar e tire compared to
when driving with standard tires.
■If you have a flat fron t tire on a road cov-
ered with snow or ice
Install the compact spare tire on one of the
rear wheels of the vehicle. Perform the fol-
lowing steps and fit tire chains to the front
tires:
1 Replace a rear tire with the compact
spare tire.
2 Replace the flat front tire with the tire
removed from the rear of the vehicle.
3 Fit tire chains to the front tires.
WARNING
■When using the compact spare tire
●Remember that the spare tire provided
is specifically desi gned for use with
your vehicle. Do not use your spare
tire on another vehicle.
●Do not use more than one spare tire
simultaneously.
●Replace the spare tire with a standard
tire as soon as possible.
●Avoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
■When the compact spare tire is
attached
The vehicle speed may not be correctly
detected, and the following systems may
not operate correctly:
• ABS & Brake assist
•VSC
•TRAC
• Dynamic radar cruise control with full- speed range
• PCS (Pre-Collision System)
•EPS
• LTA (Lane Tracing Assist) (if equipped)
• LDA (Lane Departure Alert with steering control) (if equipped)
• Panoramic view monitor (if equipped)
• Lexus parking assist monitor (if equipped)
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• BSM (Blind spot monitor) (if equipped)
• Automatic high Beam (if equipped)
Also, not only can the following system
not be utilized fully, bu t it may even nega-
tively affect the drive-train components:
•E-Four
■Speed limit when using the compact
spare tire
Do not drive at speeds in excess of 50
mph (80 km/h) when a compact spare
tire is installed on the vehicle.
The compact spare tire is not designed
for driving at high speeds. Failure to
observe this precaution may lead to an
accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.

4157-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
7
When trouble arises
■When replacing the 12-volt battery
●Use a 12-volt battery that the case size is
same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent
(60Ah) or greater, and performance rat-
ing (CCA) is equivalent (460A) or
greater.
• If the sizes differ, the 12-volt battery can-
not be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and hybrid system may
not be able to start.
●After exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before
exchanging and confirm that it is firmly
connected to the hole section of the vehi-
cle.
• Use the exhaust hole plug included
with the 12-volt battery exchanged or the
one installed on the battery prior to the
exchange. (Depending on the 12-volt
battery to be exchanged, the exhaust
hole may be plugged.)
For details, consult your Lexus dealer.
C
A
B
WARNING
■Avoiding 12-volt battery fires or
explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the 12-
volt battery:
●Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentionally in contact with
any other than the intended terminal.
●Do not allow the other end of the
jumper cable connected to the “+” ter-
minal to come into contact with any
other parts or meta l surfaces in the
area, such as brackets or unpainted
metal.
●Do not allow the + and - clamps of the
jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette
lighters or allow open flame near the
12-volt battery.
■12-volt Battery precautions
The 12-volt battery contains poisonous
and corrosive acidic electrolyte, while
related parts contain lead and lead com-
pounds. Observe the following precau-
tions when handling the 12-volt battery:
●When working with the 12-volt battery,
always wear safety glasses and take
care not to allow any battery fluids
(acid) to come into contact with skin,
clothing or the vehicle body.
●Do not lean over the 12-volt battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your ha nds after handling
the 12-volt battery support, terminals,
and other battery-related parts.

LEXUS NX300h Owners Manual_USA_M78530_en
467What 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.180)
 It is locked automatically to prevent
theft of the vehicle. ( P.175)
 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.149)
 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.176)
 The seat belt reminder light is flash-
ing
Are the driver and the passengers wearing the seat belts? (
P.391)
 The parking brake indicator is on
Is the parking brake released?
( P.183)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.386, 396)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm
sounds. ( P.77)
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.396)
 When a warning light turns on or a
warning message is displayed, refer
to P.386, 396.
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

LEXUS NX300h Owners Manual_USA_M78530_en
469Alphabetical Index
Alphabetical Index
A
A/C ................................................................... 289Air conditioning filter ............................... 367
Automatic air conditioning system ...289
Micro dust and pollen filter................... 294
S-FLOW mode.......................................... 294
ABS (Anti-lock Brake System).............. 270 Function .......................................................... 270
Warning light .............................................. 388
Active Sound Control (ASC) ..................187
AFS (Adaptive Front-lighting System) .. 191
Air conditioning filter ................................. 367
Air conditioning system ............................ 289 Air conditioning filter ............................... 367
Automatic air conditioning system ...289
Micro dust and pollen filter................... 294
S-FLOW mode.......................................... 294
Airbags ............................................................... 32 Airbag operating conditions................... 34
Airbag precautions for your child .........37
Airbag warning light ............................... 388
Correct driving posture ............................ 25
Curtain shield airbag operating condi-tions .................................................................. 34
Curtain shield airbag precautions ........37
Front passenger occupant classification system ............................................................... 41
General airbag precautions ....................37
Locations of airbags.....................................32
Modification and disposal of airbags . 40
Seat cushion airbag ......................................32 Side airbag operating conditions ......... 34
Side airbag precautions ............................ 37
Side and curtain shie
ld airbags operating
conditions ...................................................... 34
Side and curtain shield airbags precau- tions .................................................................. 37
SRS airbag instruct ions for Canadian
owners ........................................................ 456
SRS airbags...................................................... 32
SRS warning light...................................... 388
Alarm .................................................................... 77 Alarm....................................................................77
Anchor brackets ..................................... 55, 57
Antenna (Smart access system with push- button start) ..................................................126
Anti-lock brake system (ABS) ............... 270 Function .......................................................... 270
Warning light .............................................. 388
Approach warning...................................... 242
Armrest..............................................................319
ASC (Active Sound Control) ..................187
Assist grips .......................................................319
Automatic air conditioning system Air conditioning filter................................ 367
Automatic air conditioning system .. 289
Micro dust and pollen filter ................... 294
S-FLOW mode .......................................... 294
Automatic headlight leveling system ... 190
Automatic High Beam ................................192
Automatic light control system............... 190
Auxiliary box..................................................305

470Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78530_en
B
Back door .......................................................... 114 Wireless remote control............................117
Back-up lights Replacing light bulb.................................. 374
Battery (12-volt battery) If the 12-volt battery is discharged ...... 412
Preparing and checking before winter ..........................................................................277
Replacing ......................................................... 414
Warning light ...............................................386
Battery (traction battery) ............................ 70
Blind Spot Monitor (BSM)......................... 261 Blind Spot Monitor function................. 263
Rear Cross Traffic Alert function....... 265
Bottle holders................................................ 304
Brake Brake Hold .................................................... 186
Fluid .................................................................. 427
Parking brake ............................................... 183
Regenerative braking ................................. 68
Warning light ............................................... 387
Brake assist .................................................... 270
Brake Hold ...................................................... 186
Break-in tips..................................................... 157
Brightness control Instrument panel light control ................88
BSM (Blind Spot Monitor)......................... 261 Blind Spot Monitor function................. 263
Rear Cross Traffic Alert function....... 265
BSM (Blind Spot Monitor) main switch261
C
Card key .......................................................... 106
Care Aluminum wheels ..................................... 330
Exterior............................................................333
Interior .............................................................333
Seat belts ........................................................333
Cargo capacity........................... 161, 164, 422
Cargo hooks ................................................. 306
Cargo net hooks .......................................... 306
Chains .............................................................. 278
Child restraint system....................................47 Booster seats installation .......................... 53
Convertible seats installation .................. 52
Front passenger occupa nt 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 ........................................................47 12-volt battery precautions ........ 353, 415
Airbag precautions ...................................... 37
Back door precautions .............................. 114
Child restraint system ................................. 47
How your child should wear the seat belt............................................................................. 28
Installing child restraints............................. 47
Moon roof precautions............................ 152

LEXUS NX300h Owners Manual_USA_M78530_en
Alphabetical Index471
Power window lock switch.....................149
Power window precautions ...................149
Rear door child-protectors ..................... 113
Removed key battery precautions ...369
Seat belt extender precautions ............. 28
Seat belt precautions ...................................47
Seat heater precautions ......................... 297
Child-protectors............................................. 113
Cleaning.............................................. 330, 333 Aluminum wheels ......................................330
Exterior ...........................................................330
Interior ............................................................. 333
Seat belts........................................................ 333
Clock ................................................................. 310
Compass ......................................................... 326
Condenser ..................................................... 350
Console box .................................................. 304
Consumption screen .................................... 99
Coolant Capacity ......................................................... 425
Checking ....................................................... 349
Preparing and checking before winter..........................................................................277
Warning light ............................................... 387
Cooling system............................................. 349 Hybrid system overheating ....................416
Cornering lights .............................................. 191 Coussins gonflables
Modification et élimin ation en fin de vie
des coussins gonflables ...................... 462
Précautions avec les coussins gonflables latéraux ....................................................... 458
Précautions avec les coussins gonflables latéraux et rideau ................................... 458
Précautions avec les coussins gonflables pour votre enfant ................................... 458
Précautions avec les coussins gonflables rideau........................................................... 458
Précautions générales avec les coussins gonflables .................................................. 458
Cruise control Dynamic radar cruise control with full-
speed range ..............................................236
Cup holders ................................................... 304
Curtain shield airbags .................................. 32
Customizable features ................................441
D
Daytime running light system .................. 190
Deck board .................................................... 307
Deck under tray ........................................... 307
Defogger Outside rear view mirrors.................... 290
Rear window ............................................... 290
Windshield ................................................... 290
Differential .......................................................427
Dimension ...................................................... 422
Dinghy towing................................................. 173

472Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78530_en
Display BSM (Blind Spot Monitor) ..................... 261
Drive information .......................................... 90
Dynamic radar cruise control with full-speed range .............................................. 236
Energy monitor.............................................. 99
Head-up display ........................................... 94
Intuitive parking assist.............................. 247
LDA (Lane Departure Alert with steering control) ........................................................ 226
LTA (Lane Tracing Assist)...................... 217
Multi-information display .......................... 89
Warning messages ..................................396
Do-it-yourself maintenance .................... 342
Door lock Back door......................................................... 115
Side doors ........................................................ 110
Smart access system with push-button start .................................................................. 126
Wireless remote control..........................107
Doors Automatic door lock ing and unlocking
system ............................................................. 113
Back door..........................................................114
Door glasses ................................................. 148
Door lock.......................................................... 110
Outside rear view mirrors ......................146
Rear door child-protectors ..................... 113
Side doors ........................................................ 110
Drive information ........................................... 90
Drive-start control .............................. 157, 179
Driver’s seat belt remi nder light ..............391
Driver’s seat position memory ................ 138 Driving
Break-in tips ...................................................157
Correct posture............................................. 25
Driving mode select switch ..................269
Hybrid vehicle driving tips .................... 275
Procedures .................................................... 156
Winter drive tips ......................................... 277
Driving position memory........................... 138 Memory recall function............................ 139
Dynamic radar cruise control with full- speed rangeFunction ..........................................................236
E
E-Four .............................................................. 270
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 270
Eco mode........................................................ 269
EDR (Event data recorder) ........................... 8
Electric motor Location ............................................................. 67
Specification ................................................. 423
Electric Power Steering (EPS) Function .......................................................... 270
Warning light .............................................. 388
Electronic key Battery-saving function............................. 127
If the electronic key does not operate properly ........................................................ 410
Replacing the battery .............................. 368
Electronically Controlled Brake System (ECB) ............................................................ 270

LEXUS NX300h Owners Manual_USA_M78530_en
Alphabetical Index473
Emergency flashers .................................... 378
Emergency, in case ofIf a warning buzzer sounds ..................386
If a warning light turns on ......................386
If a warning message is displayed.....396
If the 12-volt battery is discharged ...... 412
If the electronic key does not operate properly........................................................ 410
If the fuel filler door cannot be opened .........................................................................409
If the hybrid system will not start ........ 407
If the vehicle is trapped in rising water ......................................................................... 379
If you have a flat tire ................................. 400
If you lose your keys.................................409
If you think something is wrong .........384
If your vehicle becomes stuck...............419
If your vehicle has to be stopped in an
emergency ................................................ 378
If your vehicle needs to be towed ...... 381
If your vehicle overheats ..........................416
Energy monitor ............................................... 99
Engine Accessory mode ......................................... 176
Compartment ............................................. 346
Engine switch................................................. 174
Hood................................................................ 344
How to start the hybrid system ............ 174
Identification number ............................... 423
If your vehicle has to be stopped in an
emergency ................................................ 378
Ignition switch (power switch) .............. 174
Overheating...................................................416
Power switch ................................................. 174 Engine compartment cover .................... 347
Engine coolant
Capacity .........................................................425
Checking .......................................................349
Preparing and checking before winter.......................................................................... 277
Warning light ...............................................387
Engine coolant temperature gauge ....... 84
Engine oil Capacity ......................................................... 424
Checking ....................................................... 347
Warning light ...............................................387
Engine switch .................................................. 174
EPS (Electronic Power Steering) Function .......................................................... 270
Warning light .............................................. 388
EV drive mode................................................ 177
EV indicator ...................................................... 68
Event data recorder (E DR) ........................... 8
F
Flat tire .............................................................400
Tire pressure warning system .............357
Floor mats .......................................................... 24
Fluid Brake ................................................................ 427
Transmission................................................. 426
Washer ............................................................ 351
Fog lights Replacing light bulbs ................................ 374
Switch................................................................ 195
Front passenger occupant classification system ................................................................ 41