fuse LEXUS NX300h 2021 Owners Manual

4TABLE OF CONTENTS
LEXUS NX300h Owners Manual_USA_M78578_en
Luggage compartment features
........................................................... 308
5-5. Using the other interior features Other interior features ............... 312
Garage door opener.................. 322
Compass.......................................... 328
6-1. Maintenance and care Cleaning and protecting the vehi-cle exterior ................................... 332
Cleaning and protecting the vehi- cle interior .................................... 335
6-2. Maintenance Maintenance requirements ..... 339
General maintenance ................ 340
Emission inspection and mainte- nance (I/M) programs ............ 342
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................... 344
Hood.................................................. 346
Positioning a floor jack............... 346
Engine compartment.................. 348
12-volt battery................................ 354
Tires ................................................... 357
Tire inflation pressure ................. 365
Wheels.............................................. 367
Air conditioning filter..................368
Electronic key battery ................ 369
Checking and replacing fuses . 371
Headlight aim................................. 373
Light bulbs ....................................... 3757-1. Essential information
Emergency flashers .................... 380
If your vehicle has to be stopped in an emergency ............................ 380
If the vehicle is trapped in rising water ............................................... 381
7-2. Steps to take in an emergency If your vehicle needs to be towed.......................................................... 383
If you think something is wrong .......................................................... 386
If a warning light turns on or a warn- ing buzzer sounds..................... 388
If a warning messa ge is displayed
.......................................................... 398
If you have a flat tire .................... 402
If the hybrid syst em will not start
.......................................................... 409
If you lose your keys....................... 411
If the fuel filler door cannot be opened ............................................. 411
If the electronic key does not oper- ate properly ................................... 412
If the 12-volt battery is discharged ............................................................ 414
If your vehicle overheats ............ 418
If the vehicle becomes stuck ..... 421
8-1. Specifications Maintenance data (fuel, oil level, etc.) .................................................. 424
Fuel information .

........................... 432
Tire information ............................ 434
6Maintenance and care
7When trouble arises
8Vehicle specifications

3135-5. Using the other interior features
LEXUS NX300h Owners Manual_USA_M78578_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 power switch is in 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 hy brid system 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)

331
LEXUS NX300h Owners Manual_USA_M78578_en
6
6
Maintenance and care
Maintenance and care
6-1. Maintenance and care
Cleaning and protecting the vehi-cle exterior ................................ 332
Cleaning and protecting the vehi- cle interior ................................. 335
6-2. Maintenance Maintenance requirements .. 339
General maintenance ............. 340
Emission inspection and mainte- nance (I/M) programs ......... 342
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................ 344
Hood............................................... 346
Positioning a floor jack............ 346
Engine compartment............... 348
12-volt battery............................. 354
Tires ................................................ 357
Tire inflation pressure .............. 365
Wheels........................................... 367
Air conditioning filter...............368
Electronic key battery ............. 369
Checking and replacing fuses 371
Headlight aim.............................. 373
Light bulbs .................................... 375

3446-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_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.354)•Grease
• Conventional wrench
(for terminal clamp
bolts)
Brake fluid
level
( P.353)
• 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.351)
•“Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, 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.349)
• “Toyota Genuine Motor
Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.371)Fuse with same amperage
rating as original
Light bulbs
( P.375)Bulb with same number
and wattage rating as orig-
inal
Headlight aimPhillips-head screw-driver
Radiator and
condenser
( P.352)
—
ItemsParts and tools

3486-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
Fuse box (P.371)
Engine coolant reservoir ( P.351)
Engine oil filler cap ( P.350)
Power control unit coolant reservoir ( P.352)
Brake fluid reservoir ( P.353)
Radiator ( P.352)
Condenser ( P.352)
Electric cooling fans
Engine oil level dipstick ( P.349)
Washer fluid tank ( P.353)
■12-volt battery
 P.354
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J

3716-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
6
Maintenance and care
1Turn 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

3726-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
Type A
Normal fuse
Blown fuse
Type BNormal 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.375)
●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.
A
B

3736-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
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
●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.
■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

4097-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
7
When trouble arises
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.412)
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle. ( P.70)
 There may be a malfunction in the
immobilizer system. ( P.75)
 There may be a malfunction in the
steering lock system.
 The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system. ( P.410)
WARNING
■After using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.
NOTICE
■Be careful when driving over bumps
with the compact spare tire installed
on the vehicle
The vehicle becomes lower when driving
with the compact spare tire compared to
when driving with standard tires. Be
careful when driving over uneven road
surfaces.
■Driving with tire chains and the com-
pact spare tire
Do not fit tire chains to the compact
spare tire.
Tire chains may damage the vehicle body
and adversely affect driving perfor-
mance.
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pr essure warning valve
and transmitter may be damaged if not
handled correctly.
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation.
Check the following and perform
the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
(  P.174)

4157-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
7
When trouble arises
2Open the hood ( P.346) and fuse
box cover. 3
Open the exclusive jump starting
terminal cover.
4 Remove the engine cover.
5 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Exclusive jump starting terminal (your vehicle)
A
B
C
D
A