2021 LEXUS NX300h key battery

468What to do if... (Troubleshooting)
LEXUS NX300h Owners Manual_USA_M78578_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.411)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.411)
 Is the electronic key battery weak or
depleted? ( P.369)
 Is the power switch in ON mode?
When locking the doors, turn the
power switch off. ( P.177)
 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.128)
 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.113)
 Did you press the power switch
while firmly depressing the brake
pedal? ( P.174)
 Is the shift lever in P? ( P.174)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.126)
 Is the steering wheel unlocked?
( P.175)
 Is the electronic key battery weak or
depleted?
In this case, the hybrid system can
be started in a temporary way.
( P.413)
 Is the 12-volt battery discharged?
( P.414)
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

472Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Brake Hold .....................................................187
Fluid .................................................................. 429
Parking brake ............................................... 184
Regenerative braking ................................. 68
Warning light ...............................................389
Brake assist .....................................................272
Brake Hold .......................................................187
Break-in tips..................................................... 157
Brightness control Instrument panel light control ................88
BSM (Blind Spot Monitor)....................... 262 Blind Spot Monitor function................. 265
Rear Cross Traffic Alert function....... 267
BSM (Blind Spot Monitor) main switch .......................................................................... 262
C
Card key .......................................................... 106
Care Aluminum wheels ...................................... 332
Exterior ........................................................... 335
Interior ............................................................. 335
Seat belts........................................................ 335
Cargo capacity........................... 161, 164, 424
Cargo hooks .................................................308
Cargo net hooks ..........................................308
Chains ..............................................................280
Child restraint system....................................47 Booster seats installation .......................... 53
Convertible seats installation.................. 52
Front passenger occupant classification system ............................................................... 41
Infant seats definition................................... 48
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 .........355, 417
Airbag precautions.......................................37
Back door precautions...............................114 Child restraint system ................................. 47
How your child should wear the seat belt
............................................................................. 27
Installing child restraints............................. 47
Moon roof precautions............................ 152
Power window lock switch .................... 149
Power window precautions .................. 149
Rear door child-protectors ..................... 113
Removed key battery precautions....370
Seat belt extender precautions.............. 27
Seat belt precautions ..........................26, 47
Seat heater precautions..........................299
Child-protectors............................................. 113
Cleaning ...............................................332, 335 Aluminum wheels ...................................... 332
Exterior............................................................ 332
Interior .............................................................335
Seat belts ........................................................335
Clock ..................................................................312
Compass ......................................................... 328
Condenser ..................................................... 352
Console box .................................................. 306
Consumption screen .................................... 99
Coolant Capacity ......................................................... 427
Checking ........................................................ 351
Preparing and checking before winter.......................................................................... 279
Warning light .............................................. 389
Cooling system...............................................351 Hybrid system overheating ................... 418
Cornering lights .............................................192
Coussins gonflables Modification et élimin ation en fin de vie
des coussins gonflables ......................464
Précautions avec les coussins gonflables latéraux ....................................................... 460
Précautions avec les coussins gonflables latéraux et rideau ................................... 460
Précautions avec les coussins gonflables pour votre enfant ................................... 460
Précautions avec les coussins gonflables

LEXUS NX300h Owners Manual_USA_M78578_en
Alphabetical Index473
rideau ...........................................................460
Précautions générales avec les coussins gonflables ...................................................460
Cruise control Dynamic radar cruise control with full-speed range .............................................. 237
Cup holders ................................................... 306
Curtain shield airbags .................................. 32
Customizable features .............................. 443
D
Daytime running light system .................... 191
Deck board .................................................... 309
Deck under tray ........................................... 309
Defogger Outside rear view mirrors .................... 292
Rear window ................................................ 292
Windshield .................................................... 292
Differential ...................................................... 429
Dimension ...................................................... 424
Dinghy towing................................................. 173
Display BSM (Blind Spot Monitor) ................... 262
Drive information .......................................... 90
Dynamic radar cruise control with full-speed range .............................................. 237
Energy monitor.............................................. 99
Head-up display ........................................... 95
Intuitive parking assist.............................. 248
LDA (Lane Departure Alert with steering control) .........................................................227
LTA (Lane Tracing Assist)......................218
Multi-information display .......................... 89
Warning messages ..................................398
Do-it-yourself maintenance .................... 344
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, 180
Driver’s seat belt remi nder light ............ 393
Driver’s seat position memory ................ 138
Driving Break-in tips ...................................................157
Correct posture............................................. 25
Driving mode select switch .................. 270
Hybrid vehicle driving tips .................... 277
Procedures .................................................... 156
Winter drive tips ......................................... 279
Driving position memory........................... 138 Memory recall function............................ 139
Dynamic radar cruise control with full- speed rangeFunction .......................................................... 237
E
E-Four .............................................................. 273
ECB (Electronically Controlled Brake Sys-
tem) .................................................................272
Eco mode........................................................ 270
EDR (Event data recorder) ........................... 8
Electric motor Location ............................................................. 67
Specification ................................................. 426
Electric Power Steering (EPS) Function .......................................................... 272
Warning light .............................................. 390
Electronic key Battery-saving function............................. 127
If the electronic key does not operate properly .........................................................412

474Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Replacing the battery...............................369
Electronically Controlled Brake System (ECB) .............................................................272
Emergency flashers ....................................380
Emergency, in case of If a warning buzzer sounds ................. 388
If a warning light turns on ..................... 388
If a warning message is displayed.....398
If the 12-volt battery is discharged ...... 414
If the electronic key does not operate properly......................................................... 412
If the fuel filler door cannot be opened .............................................................................411
If the hybrid system will not start ........409
If the vehicle is trapped in rising water .......................................................................... 381
If you have a flat tire .................................. 402
If you lose your keys.....................................411
If you think something is wrong .........386
If your vehicle becomes stuck............... 421
If your vehicle has to be stopped in an
emergency ............................................... 380
If your vehicle needs to be towed .....383
If your vehicle overheats ......................... 418
Energy monitor ............................................... 99
Engine .............................................................. 425 Accessory mode ......................................... 177
Compartment .............................................348
Engine switch................................................. 174
Hood................................................................ 346
How to start the hybrid system ............ 174
Identification number ............................... 425
If your vehicle has to be stopped in an
emergency ............................................... 380
Ignition switch (power switch) .............. 174
Overheating.................................................. 418
Power switch ................................................. 174
Engine compartment cover .................... 349
Engine coolant Capacity ......................................................... 427
Checking .........................................................351
Preparing and checking before winter .......................................................................... 279
Warning light .............................................. 389
Engine coolant temperature gauge ....... 84
Engine oil Capacity ......................................................... 426
Checking .......................................................349
Warning light .............................................. 389
Engine switch .................................................. 174
EPS (Electronic Power Steering) Function .......................................................... 272
Warning light .............................................. 390
EV drive mode................................................178
EV indicator ...................................................... 68
Event data recorder (E DR) ........................... 8
F
Flat tire ............................................................. 402
Tire pressure warning system ............ 359
Floor mats .......................................................... 24
Fluid Brake ................................................................ 429
Transmission.................................................428
Washer ...........................................................353
Fog lights Replacing light bulbs ................................375
Switch................................................................ 196
Front passenger occupant classification system ................................................................ 41
Front passenger’s seat belt reminder light .......................................................................... 393
Front seat heaters........................................300
Front seats ........................................................132 Adjustment ......................................................132
Cleaning .........................................................335
Correct driving posture ............................ 25
Driving position memory ........................ 138
Head restraints............................................... 141
Power easy access system .................... 138
Seat heaters ................................................. 300
Seat position memory .............................. 138
Front side marker lights Light switch .................................................... 190

476Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Initialization
Items to initialize ......................................... 454
Inside rear view mirror ................................144
Instrument panel light control ................... 88
Interior lights.................................................. 302
Intuitive parking assist Enabled/disabled on the system ....... 248
Function .......................................................... 248
Warning message..................................... 249
J
JackPositioning a floor jack............................ 346
Vehicle-equipped jack ........................... 402
Jack handle .................................................... 402
Jam protection function Moon roof ........................................................ 151
Power back door closer ............................121
Power windows........................................... 148
Rear seats ........................................................ 137
K
Keyless entrySmart access system with push-button start .................................................................. 126
Wireless remote control..........................107
Keys.................................................................... 106 Battery-saving function ............................ 127
Electronic key ............................................... 106
Engine switch................................................. 174
If the electronic key does not operate properly......................................................... 412
If you lose your keys.....................................411
Key number plate ....................................... 106
Keyless entry ......................................... 110, 126
Mechanical key............................................ 106
Power switch ................................................. 174
Replacing the battery...............................369
Warning buzzer ........................................... 127
Wireless remote control key .................107
Knee airbags .................................................... 32
L
Lane Departure Alert with steering control (LDA) .............................................................227
Lane Tracing Assist (LTA) .........................218
Language (multi-information display) 446
LATCH anchors ............................................. 55
LDA (Lane Departure Alert with steering control) ..........................................................227
Lever Auxiliary catch lever .................................346
Hood lock release lever .........................346
Shift lever .........................................................180
Turn signal lever .......................................... 183
Wiper lever .................................................... 196
Lexus Enform Remote.................................. 65
Lexus Enform Safety Connect.................. 60
Lexus Enform Service Connect ............... 66
Lexus Safety System+ 2.0 Automatic High Beam ............................. 193
Dynamic radar cruise control with full-
speed range .............................................. 237
LDA (Lane Departure Alert with steering control) ........................................................ 227
LTA (Lane Tracing Assist) ..................... 218
PCS (Pre-Collision System) ................... 211
RSA (Road Sign Assist)..........................235
License plate lights Light switch .................................................... 190
Replacing light bulbs ................................375
Light Automatic High Beam system ............. 193
Cornering lights ...........................................192
Fog light switch ............................................ 196
Headlight switch.......................................... 190
Illuminated entry system .........................302
Interior light list ............................................302
Interior lights ................................................ 303
Luggage compartment light ................... 116
Personal lights ............................................ 303
Replacing light bulbs ................................375
Turn signal lever .......................................... 183

478Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Indicator ...................................................80, 82
Warning light ............................................... 392
Warning messages .................................. 259
PCS (Pre-Collision System) Changing settings of the system ......... 213
Function ..............................................................211
Warning light .................................................391
Warning message.....................................398
Personal lights............................................... 302 Switch ..............................................................303
PKSA (Parking Support Alert) ...............247
Power back door open er and closer ..... 117
Power control unit coolant Capacity ......................................................... 427
Checking .........................................................351
Preparing and checking before winter......................................................................... 279
Radiator .......................................................... 352
Power easy access system ....................... 138
Power outlets ..................................................313
Power steering (Electric Power Steering system)...........................................................272Warning light ...............................................390
Power switch ................................................... 174
Power windows Door lock linked window operation..149
Jam protection function........................... 148
Operation....................................................... 148
Window lock switch ..................................149
Pre-Collision System (PCS) Changing settings of the system ......... 213
Function ..............................................................211
Warning light .................................................391
Warning message.....................................398
R
Radar cruise control (dynamic radar cruise control with full-speed range)............. 237
Radiator ........................................................... 352
Rear Cross Traffic Alert ............................267
Rear seat Folding down the rear seatbacks........134 Rear side marker lights
Light switch .................................................... 190
Replacing light bulbs ................................375
Rear turn signal lights Replacing light bulb ..................................375
Turn signal lever .......................................... 183
Rear view mirror Inside rear view mirror ..............................144
Outside rear view mirrors...................... 146
Rear window defogger ............................. 292
Rear window wiper.......................................201
Refueling ......................................................... 203 Capacity .........................................................425
Fuel types .......................................................425
Opening the fuel tank cap ....................203
When the fuel filler door cannot be
opened............................................................ 411
Regenerative braking ................................... 68
Remote Touch .............................................. 286
Replacing Electronic key battery ............................. 369
Fuses...................................................................371
Light bulbs .....................................................375
Tires ..................................................................402
Reporting safety defects for U.S. owners .......................................................................... 456
Resetting the message indicating mainte- nance is required ...................................... 339
Road accident cautions ................................. 71
RSA (Road Sign Assist) ............................ 235
S
S-FLOW mode ............................................ 296
Safety Connect................................................ 60
Seat belts............................................................ 26 Adjusting the seat belt shoulder anchor height ...............................................................30
Automatic Locking Retractor................. 28
Child restraint system installation ......... 47
Cleaning and maintaining the seat belt ..........................................................................335
Emergency Locking Retractor .............. 28

482Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Size....................................................................430
Window glasses ............................................ 148
Window lock switch .....................................149
Windows Power windows........................................... 148
Rear window defogger .......................... 292
Washer .................................................. 196, 201
Windshield wiper de-ice r ........................ 296
Windshield wipers Intermittent windshield wipers ..............196
Rain-sensing windshield wipers.......... 198
Winter driving tips....................................... 279
Wireless charger ...........................................314
Wireless remote control key ....................107 Battery-saving function ............................ 127
Locking/Unlocking ....................................107
Panic mode.................................................... 108
Replacing the battery...............................369
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