fuse box LEXUS NX300h 2020 Owners Manual

3466-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78530_en
Fuse box (P.370)
Engine coolant reservoir ( P.349)
Engine oil filler cap ( P.348)
Power control unit coolant reservoir ( P.350)
Brake fluid reservoir ( P.351)
Radiator ( P.350)
Condenser ( P.350)
Electric cooling fans
Engine oil level dipstick ( P.347)
Washer fluid tank ( P.351)
■12-volt battery
 P.352
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J

3706-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78530_en
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_M78530_en
Type AAdjustment 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

4137-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
7
When trouble arises
2 Open the hood ( P.344) 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

4147-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any mo ving parts as shown in the illustration
6 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery of your
vehicle.
7 Open and close any of the doors of
your vehicle with the power switch
off.
8 Maintain the engine speed of the
second vehicle and start the hybrid
system of your vehicle by turning
the power switch to ON mode.
9 Make sure the “READY” indicator
comes on. If the indicator light does
not come on, contact your Lexus
dealer.
10 Once the hybrid system has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
11 Close the exclusive jump starting
terminal cover, and reinstall the fuse
box cover to its original position.
Once the hybrid system starts, have
the vehicle inspected at your Lexus
dealer as soon as possible.
■Starting the hybrid system when the 12-
volt battery is discharged
The hybrid system cannot be started by
push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio sys-
tem while the hybrid system is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery
will discharge gradually even when the
vehicle is not in use, due to natural dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
■When the 12-volt batte ry is removed or
discharged
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
12-volt battery is discharged. Use the
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The hybrid system may not start on the
first attempt after the 12-volt battery has
recharged but will start normally after the
second attempt. This is not a malfunction.
●The power switch mode is memorized by
the vehicle. When the 12-volt battery is
reconnected, the system will return to the
mode it was in before the 12-volt battery
was discharged. Before disconnecting
the 12-volt battery, turn the power switch
off.
If you are unsure what mode the power
switch was in before the 12-volt battery
discharged, be especially careful when
reconnecting the 12-volt battery.
●Some systems may requ ire initialization.
B
C
D

474Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78530_en
Front passenger’s seat belt reminder light
............................................................................391
Front seat heaters........................................ 297
Front seats ........................................................132 Adjustment...................................................... 132
Cleaning......................................................... 333
Correct driving posture ............................ 25
Driving position memory........................ 138
Head restraints ...............................................141
Power easy access system .................... 138
Seat heaters .................................................. 297
Seat position memory .............................. 138
Front side marker lights Light switch .................................................... 189
Replacing light bulbs................................ 375
Wattage.......................................................... 429
Front turn signal lights Replacing light bulbs.................... 374, 375
Turn signal lever ...........................................182
Wattage.......................................................... 429
Fuel Capacity ......................................................... 423
Fuel gauge ....................................................... 84
Gas station information..........................484
Information ....................................................430
Refueling ........................................................ 202
Type.................................................................. 423
Warning light .................................................391
Fuel filler door ............................................... 202 Refueling ........................................................ 202
When the fuel filler door cannot be opened ........................................................409
Fuses ................................................................. 370G
Garage door opener ................................. 320
Gas station information ............................ 484
Gauges ............................................................... 84
Glove box ....................................................... 304
Glove box light ............................................. 304
Grocery bag hooks .................................... 307
H
Head restraints ................................................ 141
Head-up display.............................................. 94
Headlights ....................................................... 189 Automatic headlight leveling ................ 190
Automatic High Beam ..............................192
Light switch .................................................... 189
Replacing light bulbs ................................ 374
Heated steering wheel .............................. 297
Heaters Automatic air conditioning system .. 289
Heated steering wheel ............................ 297
Outside rear view mirrors.................... 290
Seat heaters .................................................. 297
High mounted stoplight Replacing light bulb .................................. 374
Hill-start assist control ............................... 270
Hood ................................................................. 344 Open................................................................ 344
Hooks Cargo hooks............................................... 306
Retaining hooks (floor mat) ..................... 24
Horn ....................................................................144