2018 LEXUS NX300h fuses

4 TABLE OF CONTENTS
LEXUS NX300h Owners Manu-
al_USA_OM78212U 5-5. Using the other interior features
Other interior features .............. 288
Garage door opener.................. 298
Compass.......................................... 303
Lexus Enform Safety Connect 306
Lexus Enform Remote ................. 311
Lexus Enform Service Connect
............................................................ 312
6-1. Maintenance and care
Cleaning and protecting the vehi-
cle exterior .................................... 314
Cleaning and protecting the vehi-
cle interior ..................................... 317
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.................................................. 325
Positioning a floor jack............... 326
Engine compartment.................. 327
12-volt battery................................ 333
Tires ................................................... 336
Tire inflation pressure ................. 343
Wheels.............................................. 345
Air conditioning filter.................. 346
Electronic key battery ................ 347
Checking and replacing fuses 349
Headlight aim.................................. 351
Light bulbs ....................................... 353 7-1. Essential information
Emergency flashers .................... 358
If your vehicle has to be stopped in
an emergency ............................ 358
7-2. Steps to take in an emergency
If your vehicle needs to be towed
.......................................................... 360
If you think something is wrong
.......................................................... 363
If a warning light turns on or a warn-
ing buzzer sounds..................... 365
If a warning messa ge is displayed
.......................................................... 374
If you have a flat tire .................... 377
If the hybrid syst em will not start
.......................................................... 385
If you lose your keys.................... 386
If the fuel filler door cannot be
opened .......................................... 387
If the electronic key does not oper-
ate properly ................................. 387
If the 12-volt battery is discharged
.......................................................... 390
If your vehicle overheats ........... 394
If the vehicle becomes stuck ... 397
8-1. Specifications
Maintenance data (fuel, oil level,
etc.) ................................................. 40
0
Fuel information ............................ 408
Tire information ............................. 4106
Maintenance and care 7
When trouble arises
8
Vehicle specifications

313
LEXUS NX300h Owners Manu-
al_USA_OM78212U 6 6
Maintenance and care Maintenance and care 6-1. Maintenance and care
Cleaning and protecting the vehi-
cle exterior ................................. 314
Cleaning and protecting the vehi-
cle interior .................................. 317
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............................................... 325
Positioning a floor jack............ 326
Engine compartment............... 327
12-volt battery............................. 333
Tires ................................................ 336
Tire inflation pressure .............. 343
Wheels........................................... 345
Air conditioning filter............... 346
Electronic key battery ............. 347
Checking and replacing fuses
........................................................ 349
Headlight aim............................... 351
Light bulbs .................................... 353

324 6-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U 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 Items Parts and tools
12-volt Bat-
tery condition
( → P.333) •Grease
•Conventional wrench
(for terminal clamp
bolts)
Brake fluid
level
( → P.332) • FMVSS No.116 DOT 3
or SAE J1703 brake
fluid
• Rag or paper towel
• Funnel (used only for
adding brake fluid)
Engine/power
control unit
coolant level
( → P.330) • “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.328) •“Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for
adding engine oil)
Fuses
( → P.349) • Fuse with same amper-
age rating as original
Light bulbs
( → P.353) •Bulb with same number
and wattage rating as
original
Headlight aim • Phillips-head screw-
driver
Radiator and
condenser
( → P.331) —
Tire inflation
pressure
( → P.343) • Tire pressure gauge
• Compressed air source
Washer fluid
( → P.332) • Water or washer fluid
containing antifreeze
(for winter use)
• Funnel (used only for
adding water or washer
fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■
When working on the engine com-
partment
●
Make sure that the indicator on the
power switch and the “READY” indi-
cator are both off.
●
Keep hands, clothing and tools away
from the moving fan and engine drive
belt. Items Parts and tools

3496-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U 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.
4 Check 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

350 6-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U 
Type A
Normal fuse
Blown fuse 
Type B
Normal fuse
Blown fuse 
Type C
Normal fuse
Blown fuse 
Type D
Normal 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.353)●
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

3516-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U 6
Maintenance and care 
Type A
Adjustment bolt A
Adjustment bolt B 
Type B
Adjustment 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_OM78212U Alphabetical Index
451Refueling ..........................................................196
When the fuel filler door cannot be
opened ........................................................ 387
Fuses ................................................................. 349 G
Garage door opener ................................. 298
Gas station information ............................ 460
Gauges ................................................................79
Glove box ....................................................... 282
Glove box light ............................................. 282
Grocery bag hooks .................................... 285 H
Head restraints ............................................... 137
Head-up display.............................................. 90
Headlights ....................................................... 183
Automatic headlight leveling ................ 184
Automatic High Beam ............................. 186
Light switch .................................................... 183
Replacing light bulbs................................ 353
Heated steering wheel ...............................276
Heaters
Automatic air conditioning system ...268
Heated steering wheel............................ 275
Outside rear view mirrors .................... 269
Seat heaters .................................................. 275
High mounted stoplight
Replacing light bulb..................................353
Hill-start assist control ............................... 250
Hood ................................................................. 325
Warning message........................... 107, 374
Hooks
Cargo hooks................................................ 284
Retaining hooks (floor mat)......................24
Horn ................................................................... 140
Hybrid battery (traction battery)
Location............................................................. 64
Specification ................................................. 402
Hybrid battery air vent ................................. 66
Hybrid system .................................................... 61 Emergency shut off system...................... 67
Energy monitor/consumption screen 94
EV drive mode............................................... 171
High voltage components ....................... 64
Hybrid System Indicator ........................... 82
Hybrid system precautions...................... 64
Hybrid vehicle driving tips ....................255
If the hybrid system will not start ....... 385
Overheating .................................................394
Power switch................................................. 168
Regenerative braking ................................. 62
Starting the hybrid system ...................... 168
Vehicle proximity noti fication system. 63
Hybrid System Indicator.............................. 82
Hybrid transmission...................................... 173
I
I/M test ............................................................ 322
Identification
Engine............................................................... 401
Vehicle ........................................................... 400
Ignition switch (Power switch) ................ 168
Illuminated entry system ........................... 278
Immobilizer system........................................ 69
Indicators ............................................................74
Initialization
Engine oil maintenance data................329
Items to initialize ......................................... 429
Tire pressure warning system ...............341
Inside rear view mirror ............................... 140
Instrument panel light control ................... 84
Interior lights.................................................. 278
Intuitive parking assist
Function .......................................................... 227
Warning message ..................................... 229

454 Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_OM78212U Switch .............................................................. 279
Power back door open er and closer ..... 110
Power control unit coolant
Capacity .........................................................403
Checking .......................................................330
Preparing and checking before winter
......................................................................... 257
Radiator ............................................................331
Power easy access system ........................134
Power outlets ................................................ 289
Power steering (Electric Power Steering
system).......................................................... 250
Warning light ............................................... 367
Power switch .................................................. 168
Power windows
Door lock linked window operation..145
Jam protection function............................ 144
Operation........................................................ 144
Window lock switch ..................................145
Pre-Collision System (PCS)
Function .......................................................... 203
PCS switch ...................................................205
Warning light ............................................... 367
Warning message..................................... 374 R
Radar cruise control (dynamic radar cruise
control with full-speed range)............... 217
Radiator .............................................................331
Rear Cross Traffic Alert ............................. 241
Rear seat
Folding down the rear seatbacks ....... 130
Rear side marker lights
Light switch .................................................... 183
Replacing light bulbs ................................353
Rear turn signal lights
Replacing light bulb ..................................353
Turn signal lever ...........................................176
Rear view mirror
Inside rear view mirror ............................. 140
Outside rear view mirrors.......................142
Rear window defogger ............................. 269
Rear window wiper.......................................194
Refueling ...........................................................196
Capacity .......................................................... 401
Fuel types ........................................................ 401
Opening the fuel tank cap ..................... 196
When the fuel filler door cannot be
opened.........................................................387
Regenerative braking ................................... 62
Remote Touch .............................................. 264
Replacing
Electronic key battery .............................. 347
Fuses.................................................................349
Light bulbs .....................................................353
Tires .................................................................. 377
Reporting safety defects for U.S. owners
.......................................................................... 432
Resetting the message indicating mainte-
nance is required ........................................319
Road accident cautions ............................... 65