2019 LEXUS NX300H fuses

4TABLE OF CONTENTS
LEXUS NX300h Owners Manu-
al_USA_M78287_en
5-5. Using the other interior featuresOther interior features .............. 286
Garage door opener.................. 296
Compass........................................... 301
Lexus Enform Safety Connect 304
Lexus Enform Remote ............... 309
Lexus Enform Service Connect ............................................................ 310
6-1. Maintenance and care Cleaning and protecting the vehi-cle exterior .................................... 312
Cleaning and protecting the vehi- cle interior ..................................... 315
6-2. Maintenance Maintenance requirements ...... 319
General maintenance ................ 320
Emission inspection and mainte- nance (I/M) programs ............ 322
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................... 324
Hood.................................................. 326
Positioning a floor jack............... 326
Engine compartment.................. 328
12-volt battery................................ 334
Tires ................................................... 337
Tire inflation pressure ................. 345
Wheels.............................................. 346
Air conditioning filter..................348
Electronic key battery ................ 349
Checking and replacing fuses . 351
Headlight aim................................. 353
Light bulbs ....................................... 3557-1. Essential information
Emergency flashers .................... 360
If your vehicle has to be stopped in an emergency ............................ 360
7-2. Steps to take in an emergency If your vehicle needs to be towed.......................................................... 362
If you think something is wrong .......................................................... 365
If a warning light turns on or a warn- ing buzzer sounds..................... 367
If a warning messa ge is displayed
.......................................................... 376
If you have a flat tire .................... 379
If the hybrid syst em will not start
.......................................................... 387
If you lose your keys.................... 388
If the fuel filler door cannot be opened .......................................... 389
If the electronic key does not oper- ate properly ................................. 389
If the 12-volt battery is discharged .......................................................... 392
If your vehicle overheats ........... 396
If the vehicle becomes stuck ... 399
8-1. Specifications Maintenance data (fuel, oil level, etc.) ................................................. 40
2
Fuel information............................. 410
Tire information .............................. 412
6Maintenance and care
7When trouble arises
8Vehicle specifications

311
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6
6
Maintenance and care
Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................. 312
Cleaning and protecting the vehi- cle interior .................................. 315
6-2. Maintenance Maintenance requirements ... 319
General maintenance ............. 320
Emission inspection and mainte- nance (I/M) programs ......... 322
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................ 324
Hood............................................... 326
Positioning a floor jack............ 326
Engine compartment............... 328
12-volt battery............................. 334
Tires ................................................ 337
Tire inflation pressure .............. 345
Wheels........................................... 346
Air conditioning filter...............348
Electronic key battery ............. 349
Checking and replacing fuses 351
Headlight aim.............................. 353
Light bulbs .................................... 355

3246-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_M78287_en
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
12-volt Bat-
tery condition
( P.334)•Grease
•Conventional wrench
(for terminal clamp
bolts)
Brake fluid
level
( P.333)
• FMVSS No.116 DOT 3
or SAE J1703; FMVSS
No.116 DOT 4 or SAE
J1704 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power
control unit
coolant level
( P.331)
•“Toyota Super Long Life
Coolant” or a similar
high quality ethylene gly-
col-based non-silicate,
non-amine, non-nitrite
and non-borate coolant
with long-life hybrid
organic acid technology
For the U.S.A.:
“Toyota Super Long Life
Coolant” is pre-mixed
with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life
Coolant” is pre-mixed
with 55% coolant and
45% deionized water.
• Funnel (used only for adding coolant)
Engine oil
level
( P.329)
•“Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.351)Fuse with same amperage
rating as original
Light bulbs
( P.355)Bulb with same number
and wattage rating as orig-
inal
Headlight aimPhillips-head screw-driver
Radiator and
condenser
( P.332)
—
ItemsParts and tools

3516-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
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6
Maintenance and care
1 Turn the power switch off.
2 Open the fuse box cover.
Engine compartment: type A fuse
box
Push the tab in and lift the lid off.
Engine compartment: type B fuse
box
Push the tab in and lift the lid off.
Left side instrument panel
Remove the lid.
Luggage compartment
3 Remove the fuse.
Only type A fuse can be removed using the
pullout tool.
4Check if the fuse is blown.
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

3526-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_M78287_en
Type ANormal fuse
Blown fuse
Type BNormal fuse
Blown fuse
Type CNormal fuse
Blown fuse
Type DNormal fuse
Blown fuse
■After a fuse is replaced
●If the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.355)
●If the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine
Lexus products designed for this vehicle.
Because certain bulbs are connected to cir-
cuits designed to prevent overload, non-
genuine parts or parts not designed for this
vehicle may be unusable.
A
B
A
B
A
B
WARNING
■To prevent system breakdowns and
vehicle fire
Observe the following precautions.
Failure to do so may cause damage to
the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
●Always use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
A
B

3536-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
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6
Maintenance and care
Type A Adjustment bolt A
Adjustment bolt B
Type BAdjustment bolt A
Adjustment bolt B
 Make sure the vehicle has a full tank
of gasoline and the area around the
headlight is not deformed.
 Park the vehicle on level ground.
 Make sure the tire inflation pressure
WARNING
●Do not modify the fuses or fuse boxes.
■Fuse box near the power control unit
Never check or replace the fuses as
there are high voltage parts and wiring
near the fuse box.
Doing so may cause electric shock,
resulting in death or serious injury.
NOTICE
■Before replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.
Headlight aim
Vertical movement adjusting
bolts
Before checking the headlight
aim
A
B
A
B

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

455What to do if... (Troubleshooting)
LEXUS NX300h Owners Manu-
al_USA_M78287_en455Alphabetical Index
R
Radar cruise control (dynamic radar cruise control with full-speed range)............... 217
Radiator ........................................................... 332
Rear Cross Traffic Alert ........................... 245
Rear seat Folding down the rear seatbacks........128
Rear side marker lights Light switch .....................................................182
Replacing light bulbs................................355
Rear turn signal lights Replacing light bulb..................................355
Turn signal lever ........................................... 176
Rear view mirror Inside rear view mirror............................. 138
Outside rear view mirrors ..................... 140
Rear window defogger ..............................267
Rear window wiper.......................................193
Refueling ...........................................................195 Capacity .........................................................403
Fuel types.......................................................403
Opening the fuel tank cap ..................... 195
When the fuel filler door cannot be opened ........................................................389
Regenerative braking ................................... 62
Remote Touch .............................................. 262
Replacing Electronic key battery.............................. 349
Fuses ..................................................................351
Light bulbs.....................................................355
Tires .................................................................. 379
Reporting safety defects for U.S. owners .......................................................................... 432
Resetting the message indicating mainte- nance is required ........................................319
Road accident cautions ............................... 65
S
S-FLOW mode .............................................. 271
Safety Connect............................................. 304
Seat belts............................................................ 26 Adjusting the seat belt shoulder anchor height .................................................................31
Automatic Locking Retractor................. 28
Child restraint system installation ......... 47
Cleaning and maintaining the seat belt ........................................................................... 315
Emergency Locking Retractor .............. 28
How to wear your seat belt ..................... 27
How your child should wear the seat belt ............................................................................. 28
Pregnant women, proper seat belt use ............................................................................. 27
Reminder light and buzzer ......... 371, 372
Seat belt extender......................................... 28
Seat belt instructions for Canadian own- ers ................................................................... 432
Seat belt pretensioners ................................31
SRS warning light...................................... 369
Seat heaters ................................................... 273
Seat position memory..................................132
Seat ventilators ............................................. 275
Seating capacity............................................ 158
Seats Adjustment ............................................126, 127
Adjustment precautions ................ 126, 128
Child seats/child restraint system installa-tion .................................................................... 47
Cleaning .......................................................... 315
Driving position memory .........................132
Folding down the rear seatbacks ....... 128
Front seat heaters ...................................... 274
Head restraint ............................................... 135
Power easy access system .....................132
Properly sitting in the seat ........................ 25
Rear seat heaters ....................................... 274
Seat position memory ...............................132
Seat ventilators ............................................ 275