2020 LEXUS NX300 fuse

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

3015-5. Using the other interior features
LEXUS NX300 Owners Manual_USA_M78389_en
5
Interior features
Please use a power supply for elec-
tronic goods that use less than 120
VAC (power consumption of 100 W).
Open the lid.
■The power outlet can be used when
The engine switch is in IGNITION ON
mode.
A portable device can be charged by
just placing Qi standard wireless
charge compatible portable devices
according to the Wireless Power Con-
sortium, such as smart phones and
mobile batteries, etc., on the charge
area.
This function cannot be used with por-
table devices that are larger than the
charging area. Also, depending on the
portable device, it may not operate as
normal. Please read the operation
manual for portable devices to be
used.
■The “Qi” symbol
The “Qi” symbol is a trademark of the
Wireless Power Consortium.
Power outlet (120 VAC) (if
equipped)
NOTICE
■When power outlet is not in use
To avoid damaging the power outlet,
close the power outlet lid when the
power outlet is not in use.
Foreign objects or liquids that enter the
power outlet may cause a short circuit.
■To prevent blown fuse
Do not use a 120 VAC appliance that
requires more than 100 W.
If a 120 VAC appliance that consumes
more than 100 W is used, the protection
circuit will cut the power supply.
■To prevent battery discharge
Do not use the power outlet longer than
necessary when the engine is off.
■Appliances that may not operate
properly
The following 120 VAC appliances may
not operate properly even if their power
consumption is under 100 W:
●Appliances with high initial peak watt-
age
●Measuring devices that process pre-
cise data
●Other appliances that require an
extremely stable power supply
Wireless charger (if equipped)

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

3356-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
6
Maintenance and care
Fuse box (P.358)
Engine coolant reservoir ( P.338)
Engine oil filler cap ( P.336)
Engine oil level dipstick ( P.336)
Intercooler coolant reservoir ( P.338)
Battery ( P.340)
Brake fluid reservoir ( P.340)
Radiator ( P.339)
Condenser ( P.339)
Electric cooling fans
Washer fluid tank ( P.342)
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
K

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.

3957-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
7
When trouble arises
One of the following may be the cause
of the problem:
There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
 The engine may be flooded.
Try to restart the engine again fol-
lowing correct starting proce-
dures.( P.165)
 There may be a malfunction in the
engine immobilizer system.
( P.68)
One of the following may be the cause
of the problem:
 The battery terminal connections
may be loose or corroded.
 The battery may be discharged.
( P.400) The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (
P.395)
One of the following may be the cause
of the problem:
 One or both of the battery terminals
may be disconnected.
 The battery may be discharged.
( P.400)
 There may be a malfunction in the
steering lock system.
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally.
Do not use this starting procedure
except in cases of emergency.
1 Set the parking brake.
If the engine will not start
If the engine will not start even
though correct starting procedures
are being followed ( P.165), con-
sider each of the following points:
The engine will not start even
though the starter motor oper-
ates normally.
The starter motor turns over
slowly, the interior lights and
headlights are dim, or the horn
does not sound or sounds at a low
volume.
The starter motor does not turn
over
The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.
Starting the engine in an emer-
gency