2019 LEXUS NX300H maintenance

3777-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
The warning lights and warning buzzers op erate as follows depending on the con-
tent of the message. If a message indicates the need for inspection by a dealer, have
the vehicle inspected by your Lexus dealer immediately.
*: A buzzer sounds the first time a message is shown on the multi-information display.
■System warning lights
The master warning light does not come on
or flash in the following cases. Instead, a
separate system warning light will come on
along with a message shown on the multi-
information display.
●Malfunction of the ABS
The ABS warning light comes on.
(  P.369)
●Malfunction of the charging system
The charging system warning light comes
on. ( P.367)
■If “Hybrid System Overheated Reduced
Output Power” is shown
This message may be displayed when driv-
ing under severe operating conditions. (For example, when driving up a long steep hill.)
Handling method:
P.396
■If “Aux Battery Low” is shown
●When the display goes off after several
seconds*
Maintain the hybrid system operation for
more than 15 minutes and charge the 12-
volt battery.
●When the display does not go off
Start up the hybrid system using the pro-
cedures for “If the 12-volt battery is dis-
charged” ( P.392).
*: Displays for about 6 seconds
Messages and warnings
System
warning light
Warning buzzer*Warning
Comes onSounds
Indicates an important situation, such as
when a system related to driving is malfunc-
tioning or that danger may result if the cor-
rection procedure is not performed

Comes on or
flashes
Sounds
Indicates an important situation, such as
when the systems shown on the multi-infor-
mation display may be malfunctioning
FlashesSoundsIndicates a situation, such as when damage
to the vehicle or danger may result
Comes onDoes not sound
Indicates a condition, such as malfunction of
electrical components, their condition, or
indicates the need for maintenance
FlashesDoes not sound
Indicates a situation, such as when an opera-
tion has been performed incorrectly, or indi-
cates how to perform an operation correctly

3787-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
■If “Traction Battery Needs to be Pro-
tected Refrain From the Use of N Posi-
tion” is shown
This message may be displayed when the
shift lever is in N.
As the hybrid battery (traction battery) can-
not be charged when the shift lever is in N,
when the vehicle is to be stopped for a long
period of time, shift the shift lever to P.
■If “Traction battery needs to be pro-
tected. Shift into P to restart.” is shown
Message is displayed when the remaining
charge for the hybrid battery (traction bat-
tery) is low, because vehicle has been
shifted N for a long period of time.
When operating the vehicle, restart the
hybrid system.
■If “Shift to P Before Exiting Vehicle” is
shown
Message is displayed when the driver’s
door is opened with out turning the power
switch to OFF with the shift lever in any
position other than P.
Shift the shift lever to P.
■If “Shift Is in N Release Accelerator
Before Shifting” is shown
Message is displayed when the accelerator
pedal has been depressed and the shift
lever is in N. Release the accelerator pedal
and shift the shift lever to D, S or R.
■If “Depress Brake When Vehicle Is
Stopped Hybrid Syst em May Overheat”
is shown
Message is displayed when the accelerator
pedal is depressed to maintain the vehicle
position when stopped on a upward slope,
etc.
If this continues, th e hybrid system may
overheat.
Release the accelerator pedal and depress
the brake pedal.
■If “Front Camera Unavailable” or “Front
Camera Unavailable Remove Debris
On Windshield” is shown
The following systems may be suspended
until the problem shown in the message is
resolved. ( P.208, 369)
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert with steering
control)
●Dynamic radar cruise control with full-
speed range
●Adaptive High-beam System
●Automatic High Beam
■If “Oil Maintenance Required Soon” is
shown
Indicates that the engine oil is scheduled to
be changed. (The indicator will not work
properly unless the oil maintenance data
has been reset.)
Check the engine oil, and change if neces-
sary. After changing th e engine oil, the oil
change system should be reset. ( P.330)
■If “Oil Maintenance Required” is shown
Indicates that the engine oil should be
changed. (After the engine oil is changed
and the oil maintenance data has been
reset.)
Check and change the en gine oil, and oil fil-
ter by your Lexus dealer. After changing the
engine oil, the oil change system should be
reset. ( P.330)
■If “See Owner’s Manual” is shown
●If the following messages are shown, fol-
lowing the instruct ions, accordingly.
• “Engine Coolant Temp High” ( P.396)
• “Aux Battery Low” ( P.377)
●If the following messages are shown,
there may be a malfunction.
Immediately have the vehicle inspected
by your Lexus dealer.
• “Hybrid System Malfunction”
•“Check Engine”
• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction”
• “Braking Power Low”
• “Smart Access System Malfunction”
●If “Maintenance required for Traction bat-
tery cooling parts” is shown, the filters
may be clogged, the air intake vents may
be blocked, or there may be a gap in the
duct. Therefore, perform the following
correction procedure.
• If the air intake vents of the hybrid battery (traction battery) are dirty, perform the
procedure on P. 316 to clean them.
• If the warning message is shown when

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Vehicle specifications
Vehicle specifications
8-1. SpecificationsMaintenance data (fuel, oil level, etc.) .............................................. 402
Fuel information .......................... 410
Tire information........................... 412
8-2. Customization Customizable features............. 421
8-3. Initialization Items to initialize ........................ 430

4028-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_M78287_en
8-1.Specifications
*1:Unladen vehicle
*2: Vehicles with towing package
■Vehicle identification number
The vehicle identification number
(VIN) is the legal identifier for your
vehicle. This is the primary identifica-
tion number for your Lexus. It is used in
registering the ownership of your vehi-
cle.
This number is stamped on the top left
of the instrument panel. This number is also on the Certification
Label.
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
Overall length182.7 in. (4640 mm)
Overall width72.6 in. (1845 mm)
Overall height*164.8 in. (1645 mm)
Wheelbase104.7 in. (2660 mm)
TreadFront62.2 in. (1580 mm)
Rear62.2 in. (1580 mm)
Vehicle capacity weight
(Occupants + luggage)895 lb. (405 kg)
Trailer Weight Rating*2
(Trailer weight + cargo weight)1500 lb. (685 kg)
Vehicle identification

4308-3. Initialization
LEXUS NX300h Owners Manu-
al_USA_M78287_en
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the 12-volt battery being reconnected, or maintenance being per-
formed on the vehicle.
List of the items to initialize
ItemWhen to initializeReference
Parking Support Brake function (for
static objects)
*After reconnecting or changing the
12-volt batteryP.238
Message indicating maintenance is
required (U.S.A. only)After the maintenance is performedP.319
Tire pressure warning system
• When rotating the tires on vehi- cles with differing front and rear
tire inflation pressures
• When changing the tire inflation pressure by changing traveling
speed or load weight, etc.
•When changing the tire size
P.343
Oil maintenanceAfter the maintenance is performedP.330
Lexus parking assist monitor*
• After reconnecting or changing the 12-volt battery
• After changing a fuse
Refer to the
“NAVIGA-
TION AND MULTIME- DIA SYS- TEM
OWNER’S
MANUAL”.
Panoramic view monitor*
Power back door*P.114
Power window
When functioning abnormally
P.142
Moon roof*P.145

449What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en449Alphabetical Index
D
Daytime running light system .................. 183
Deck board .................................................... 283
Deck under tray ........................................... 283
Defogger Outside rear view mirrors .................... 267
Rear window ................................................ 267
Windshield .................................................... 267
Differential ...................................................... 407
Dimension ...................................................... 402
Dinghy towing................................................. 167
Display BSM (Blind Spot Monitor) ..................... 241
Drive information ..........................................85
Dynamic radar cruise control with full-speed range ................................................ 217
Energy monitor.............................................. 93
Head-up display ........................................... 89
Intuitive parking assist...............................227
LDA (Lane Departure Alert with steering control) ........................................................209
Multi-information display .......................... 84
Warning messages .................................. 376
Do-it-yourself maintenance .................... 324
Door lock Back door....................................................... 109
Side doors ...................................................... 104
Smart access system with push-button start ..................................................................120
Wireless remote control........................... 101
Doors Automatic door lock ing and unlocking
system ............................................................107
Back door....................................................... 108
Door glasses .................................................. 142
Door lock........................................................ 104
Outside rear view mirrors ..................... 140
Rear door child-protectors ....................107
Side doors ...................................................... 104
Drive information ........................................... 85
Drive-start control ............................... 151, 173 Driver’s seat belt reminder light .............. 371
Driver’s seat position memory .................132
Driving
Break-in tips .................................................... 151
Correct posture............................................. 25
Driving mode select switch ..................248
Hybrid vehicle driving tips ....................254
Procedures .................................................... 150
Winter drive tips .........................................256
Driving position memory............................132 Memory recall function............................ 133
Dynamic radar cruise control with full- speed rangeFunction ............................................................ 217
Warning message ..................................... 224
E
E-Four .............................................................. 250
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 249
Eco mode........................................................ 248
EDR (Event data recorder) ............................7
Electric motor Location ...............................................................61
Specification ................................................ 403
Electric Power Steering (EPS) Function .......................................................... 249
Warning light .............................................. 369
Electronic key Battery-saving function.............................. 121
If the electronic key does not operate properly ...................................................... 389
Replacing the battery ...............................349
Electronically Controlled Brake System (ECB) ............................................................ 249
Emergency flashers .................................... 360

453What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en453Alphabetical Index
Lexus Safety System+.................................. 197 Automatic High Beam ............................. 185
Dynamic radar cruise control with full-speed range ................................................ 217
LDA (Lane Departure Alert with steering control) ........................................................209
PCS (Pre-Collision System)................ 202
License plate lights Light switch .....................................................182
Replacing light bulbs................................355
Light Automatic High Beam system............. 185
Cornering lights .......................................... 184
Fog light switch ............................................ 188
Headlight switch ..........................................182
Illuminated entry system......................... 276
Interior light list ............................................ 276
Interior lights..................................................277
Luggage compartment light ................... 110
Personal lights ..............................................277
Replacing light bulbs................................355
Turn signal lever ........................................... 176
Vanity lights ..................................................286
Wattage..........................................................409
Welcome light illumination control ... 105
Light bulbs Replacing .......................................... 355, 356
Wattage..........................................................409
Luggage cover ............................................. 284
M
Maintenance Do-it-yourself maintenance ................. 324
General maintenance ...............................319
Maintenance data...................................... 402
Maintenance requirements ....................319
Malfunction indicator lamp ..................... 368 Meter
Head-up display............................................89
Indicators........................................................... 74
Instrument panel light control.................83
Meters................................................................. 79
Multi-information display ..........................84
Warning lights ............................................. 367
Warning messages................................... 376
Micro dust and pollen filter ....................... 271
Microphone ................................................... 304
Mirrors Inside rear view mirror ............................. 138
Outside rear view mirror defoggers 267
Outside rear view mirrors...................... 140
Vanity mirrors ............................................. 286
Moon roof Jam protection function ........................... 145
Operation ........................................................144
Warning message .......................... 146, 376
Multi-information display Clock................................................................... 79
Drive information ..........................................85
Dynamic radar cruise control with full-
speed range ................................................ 217
Energy monitor .............................................. 93
Language ....................................................... 424
LDA (Lane Departure Alert with steering control) ....................................................... 209
Warning messages................................... 376
N
Noise from under vehicle ...............................6

457What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en457Alphabetical Index
Light switches ................................................182
Meter control switches .............................. 84
Moon roof switches ................................... 144
Outside rear view mirror switches .... 140
Paddle shift switches .................................. 175
Parking brake switch ................................. 177
PCS switch ................................................... 204
Power back door opener and closer switch................................................................. 111
Power switch ................................................ 168
Power window switch ............................... 142
Rear window and outside rear view mir- ror defoggers switch ............................ 267
Rear window wiper and washer switch ...........................................................................193
Seat heater switches ................................ 273
“SOS” button ...............................................304
Tire pressure warning reset switch .. 343
Vehicle-to-vehicle di stance switch .... 217
VSC off switch ............................................250
Window lock switch ..................................143
Windshield wipers and washer switch ................................................................188, 193
T
Tachometer........................................................79
Tail lights Light switch .....................................................182
Replacing light bulbs................................355
Theft deterrent system Alarm .................................................................... 71
Immobilizer system...................................... 69
Tire inflation pressure Maintenance data..................................... 408
Warning light ............................................... 372 Tire information .............................................. 412
Glossary .......................................................... 416
Size ......................................................................414
Tire identification number........................413
Uniform Tire Quality Grading ..............414
Tire pressure warning system Function ..........................................................339
Initializing........................................................343
Installing tire pres sure warning valves
and transmitters....................................... 342
Registering ID codes ............................... 344
Warning light ............................................... 372
Tires................................................................... 337 Chains ............................................................. 257
Checking ....................................................... 337
Glossary .......................................................... 416
If you have a flat tire .................................. 379
Inflation pressure ...........................345, 408
Replacing ....................................................... 379
Rotating tires ............................................... 338
Size ................................................................... 408
Snow tires ......................................................256
Spare tire ........................................... 379, 408
Tire identification number........................413
Tire pressure warning system .............339
Uniform Tire Quality Grading ..............414
Warning light ............................................... 372
Tools..................................................................380
Top tether strap............................................... 57
Total load capacity ...................................... 402
Towing Dinghy towing ...............................................167
Emergency towing....................................362
Towing eyelet...............................................364
Trailer Sway Control............................... 250
Trailer towing ...................................... 159, 167