2020 LEXUS NX300 fuses

4TABLE OF CONTENTS
LEXUS NX300 Owners Manual_USA_M78389_en
5-4. Using the storage features
List of storage features............... 292
Luggage compartment features ........................................................... 295
5-5. Using the other interior features Other interior features .............. 299
Garage door opener.................. 309
Compass........................................... 315
6-1. Maintenance and care Cleaning and protecting the vehi-cle exterior ................................... 320
Cleaning and protecting the vehi- cle interior .................................... 323
6-2. Maintenance Maintenance requirements ..... 326
General maintenance ................ 327
Emission inspection and mainte- nance (I/M) programs ............ 330
6-3. Do-it-yourself maintenance Do-it-yourself service precautions............................................................ 331
Hood.................................................. 333
Positioning a floor jack............... 333
Engine compartment.................. 335
Tires ................................................... 343
Tire inflation pressure .................. 351
Wheels.............................................. 353
Air conditioning filter..................355
Electronic key battery ................ 356
Checking and replacing fuses 358
Headlight aim................................. 360
Light bulbs ........................................ 3617-1. Essential information
Emergency flashers .................... 366
If your vehicle has to be stopped in an emergency ............................ 366
If the vehicle is trapped in rising water .............................................. 367
7-2. Steps to take in an emergency If your vehicle needs to be towed.......................................................... 369
If you think something is wrong 373
Fuel pump shut off system ........ 374
If a warning light turns on or a warn- ing buzzer sounds..................... 375
If a warning messa ge is displayed
.......................................................... 384
If you have a flat tire .................... 387
If the engine will not start .......... 395
If you lose your keys.................... 396
If the fuel filler door cannot be opened .......................................... 397
If the electronic key does not oper- ate properly ................................. 397
If the vehicle battery is discharged .......................................................... 400
If your vehicle overheats ........... 403
If the vehicle becomes stuck ... 406
8-1. Specifications Maintenance data (fuel, oil level, etc.) ................................................. 408
Fuel information

............................. 416
Tire information ............................. 418
6Maintenance and care
7When trouble arises
8Vehicle specifications

319
LEXUS NX300 Owners Manual_USA_M78389_en
6
6
Maintenance and care
Maintenance and care
6-1. Maintenance and care
Cleaning and protecting the vehi-cle exterior ................................ 320
Cleaning and protecting the vehi- cle interior ................................. 323
6-2. Maintenance Maintenance requirements .. 326
General maintenance ............. 327
Emission inspection and mainte- nance (I/M) programs ......... 330
6-3. Do-it-yourself maintenance Do-it-yourself service precautions......................................................... 331
Hood............................................... 333
Positioning a floor jack............ 333
Engine compartment............... 335
Tires ................................................ 343
Tire inflation pressure ............... 351
Wheels........................................... 353
Air conditioning filter...............355
Electronic key battery ............. 356
Checking and replacing fuses ........................................................ 358
Headlight aim.............................. 360
Light bulbs ..................................... 361

3316-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
6
Maintenance and care
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
Battery condi-
tion (P.340)
•Warm water
• Baking soda
•Grease
• Conventional wrench
(for terminal clamp
bolts)
Brake fluid level
( P.340)
•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/inter-
cooler coolant
level ( P.338)
•“Toyota Super Long
Life Coolant” or a sim-
ilar high quality eth-
ylene glycol-based
non-silicate, non-
amine, non-nitrite and
non-borate coolant
with long-life hybrid
organic acid technol-
ogy
For the U.S.A.:
“Toyota Super Long
Life Coolant” is pre-
mixed with 50% cool-
ant and 50% deion-
ized water.
For Canada:
“Toyota Super Long
Life Coolant” is pre-
mixed with 55% cool-
ant and 45% deion-
ized water.
• Funnel (used only for adding coolant)
Engine oil level
( P.336)
•“Toyota Genuine
Motor Oil” or equiva-
lent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.358)Fuse with same amper-
age rating as original
Light bulbs
( P.361)Bulb with same number
and wattage rating as
original
Headlight aimPhillips-head screw-
driver
Radiator and
condenser
( P.339)
—
ItemsParts and tools

3586-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
1Turn the engine 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.
3Remove 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.
Type A
Normal fuse
Blown fuse
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
A
B

3596-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
6
Maintenance and care
Type B
Normal fuse
Blown fuse
Type CNormal fuse
Blown fuse
Type DNormal fuse
Blown fuse
■After a fuse is replaced
●When installing the lid, make sure that the
tab is installed securely.
●If the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.361)
●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.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.

LEXUS NX300 Owners Manual_USA_M78389_en
Alphabetical Index459
Engine oil maintenance data .................. 337
Engine switch ..................................................165
EPS (Electronic Power Steering)
Function ..........................................................260
Warning light ................................................377
Event data recorder (EDR) ............................7
F
Flat tire ............................................................. 387 Tire pressure warning system ............. 345
Floor mats .......................................................... 24
Fluid Automatic transmission ............................ 412
Brake..................................................................413
Washer ........................................................... 342
Fog lights Replacing light bulbs................................ 362
Switch ............................................................... 184
Front passenger occupant classification system ................................................................ 41
Front passenger’s seat belt reminder light
.......................................................................... 379
Front seat heaters........................................ 287
Front seats ........................................................ 122 Adjustment...................................................... 122
Cleaning......................................................... 323
Correct driving posture ............................ 25
Driving position memory.........................128
Head restraints .............................................. 131
Power easy access system .....................128
Seat heaters .................................................. 287
Seat position memory ...............................128
Front side marker lights Light switch .....................................................178
Replacing light bulbs................................ 362
Wattage............................................................415 Front turn signal lights
Replacing light bulbs ................................362
Turn signal lever ........................................... 172
Wattage ........................................................... 415
Fuel Capacity ........................................................ 409
Fuel gauge ........................................................ 79
Gas station information ......................... 468
Information ..................................................... 416
Refueling............................................................ 191
Type ................................................................. 409
Warning light ............................................... 379
Fuel filler door .................................................. 191 Refueling............................................................ 191
When the fuel filler door cannot be
opened......................................................... 397
Fuses .................................................................358
G
Garage door opener ................................. 309
Gas station information ............................ 468
Gauges ................................................................79
Glove box ....................................................... 293
Glove box light ............................................. 293
Grocery bag hooks .................................... 296
H
Head restraints ................................................ 131
Head-up display..............................................88
Headlights ........................................................178 Automatic headlight leveling .................179
Automatic High Beam system ............... 181
Light switch .................................................... 178
Replacing light bulbs ................................362

LEXUS NX300 Owners Manual_USA_M78389_en
Alphabetical Index463
Rear turn signal lights
Replacing light bulbs................................ 362
Turn signal lever ........................................... 172
Rear view mirror Inside rear view mirror..............................134
Outside rear view mirrors ......................136
Rear window defogger .............................280
Rear window wiper...................................... 189
Refueling ............................................................ 191 Capacity .........................................................409
Fuel types.......................................................409
Opening the fuel tank cap ....................... 191
When the fuel filler door cannot be opened ........................................................ 397
Remote Touch ...............................................274
Replacing Electronic key battery..............................356
Fuses ............................................................... 358
Light bulbs..................................................... 362
Tires .................................................................. 387
Reporting safety defects for U.S. owners .......................................................................... 440
Resetting the message indicating mainte- nance is required ...................................... 326
RSA (Road Sign Assist) ............................ 223
S
S-FLOW mode ............................................ 284
Safety Connect.................................................. 61
Seat belts............................................................ 26 Adjusting the seat belt shoulder anchor height............................................................... 30
Automatic Locking Retractor ................ 28
Child restraint system installation ......... 48
Cleaning and maintaining the seat belt ......................................................................... 323 Emergency Locking Retractor .............. 28
How to wear your seat belt ..................... 27
How your child should wear the seat belt
............................................................................. 27
Pregnant women, proper seat belt use ............................................................................. 26
Reminder light and buzzer ...... 379, 380
Seat belt extender......................................... 27
Seat belt instructions for Canadian own- ers .................................................................. 440
Seat belt pretensioners ..............................30
SRS warning light....................................... 376
Seat heaters ................................................... 287
Seat position memory..................................128
Seat ventilators .............................................288
Seating capacity.............................................154
Seats Adjustment ............................................122, 123
Adjustment precautions .................122, 124
Child seats/child restraint system installa-tion ....................................................................48
Cleaning ......................................................... 323
Driving position memory ........................ 128
Folding down the rear seatbacks ........124
Front seat heaters ......................................287
Head restraint ................................................. 131
Power easy access system .................... 128
Properly sitting in the seat ........................ 25
Rear seat heaters ....................................... 287
Seat position memory .............................. 128
Seat ventilators ........................................... 288
Sécurité de l’enfant Précautions avec les coussins gonflables.......................................................................... 444