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Lexus NX300h (2021 year). Manual in english - page 22

370

6-3. Do-it-yourself maintenance

Take out the mechanical key.

Remove the cover.

To prevent damage to the key, cover the tip

of the flathead screwdriver with a tape.

Remove the depleted battery.

Insert a new battery with the “+” terminal

facing up.

Replacing the battery

WARNING

■

Removed battery and other parts

These parts are small and if swallowed by

a child, they can cause choking. Keep

away from children. Failure to do so

could result in death or serious injury.

NOTICE

■

For normal operation after replacing

the battery

Observe the following precautions to

prevent accidents:

●

Always work with dry hands.

Moisture may cause the battery to

rust.

●

Do not touch or move any other com-

ponent inside the remote control.

●

Do not bend either of the battery ter-

minals.

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6-3. Do-it-yourself maintenance

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Turn the power switch off.

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

Remove the fuse.

Only type A fuse can be removed using the

pullout tool.

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

372

6-3. Do-it-yourself maintenance



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

●

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

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

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6-3. Do-it-yourself maintenance

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

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

●

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

374

6-3. Do-it-yourself maintenance

is at the specified level.



Have someone sit in the driver’s
seat.



Bounce the vehicle several times.

Using a Phillips-head screwdriver,
turn bolt A in either direction.
Remember the turning direction
and the number of turns.



Type A



Type B

Turn bolt B the same number of
turns and in the same direction as
step

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.



Type A



Type B

Adjusting the headlight aim

375

6-3. Do-it-yourself maintenance

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

P.349

Front side marker light (bulb type)

Front turn signal light (bulb type)

■

Bulbs that need to be replaced by
the Lexus dealer



Headlights



Front turn signal lights (LED type)



Parking lights and Daytime running
lights



Front fog lights



Front side marker lights (LED type)



Side turn signal lights



Stop/tail lights



Rear side marker lights



Back-up light



Rear turn signal light



High mounted stoplight



License plate lights



Outer foot lights

■

LED lights

The lights other than the front side marker

lights (bulb type) and front turn signal lights

(bulb type) each consist of a number of

LEDs. If any of the LEDs burn out, take your

vehicle to your Lexus dealer to have the

light replaced.

■

Condensation build-up on the inside of

the lens

Temporary condensation build-up on the

inside of the headlight lens does not indi-

cate a malfunction. Contact your Lexus

dealer for more information in the following

situations:

●

Large drops of water have built up on the

inside of the lens.

●

Water has built up inside the headlight.

■

When replacing light bulbs



P.372

Light bulbs

You may replace the following bulbs
by yourself.
The difficulty level of replacement
varies depending on the bulb. If
necessary bulb replacement seems
difficult to perform, contact your
Lexus dealer.
For more information about replac-
ing other light bulbs, contact your
Lexus dealer.

Removing the engine compart-
ment cover

Bulb locations

A
B

376

6-3. Do-it-yourself maintenance

Before replacing, check the wattage of
the light bulb to be replaced. (



P.431)

■

Front side marker lights (bulb type)

Turn the bulb base counterclock-
wise.

Remove the light bulb.

When installing, reverse the steps
listed.

■

Front turn signal lights (bulb type)

Open the hood and remove the
cover for engine compartment
cover. (



P.346, 349)

Remove the cover.

Push the center of the clip

and remove

the clip and cover

Turn the bulb base counterclock-
wise.

Remove the light bulb.

Replace the light bulb.

Replacing light bulbs

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6-3. Do-it-yourself maintenance

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Turn clockwise and set the bulb
base.

Attach the clip to the cover.

Push up on the center of the clip and attach
the clip

Attach the cover.

Align the 2 tabs positions and close the
cover

and fix the cover by pushing the

center of the clip

Install the engine compartment
cover. (



P.349)

WARNING

■

Replacing light bulbs

●

Be sure to stop the hybrid system and

turn off the lights. Do not attempt to

replace the bulb immediately after

turning off the lights.

The bulbs become very hot and may

cause burns.

●

Do not touch the glass portion of the

light bulb with bare hands. When it is

unavoidable to hold the glass portion,

use and hold with a clean dry cloth to

avoid getting moisture and oils on the

bulb.

Also, if the bulb is scratched or

dropped, it may blow out or crack.

●

Fully install light bulbs and any parts

used to secure them. Failure to do so

may result in heat damage, fire, or

water entering the headlight unit. This

may damage the headlights or cause

condensation to build up on the lens.

●

Do not attempt to repair or disassem-

ble light bulbs, connectors, electric cir-

cuits or component parts.

Doing so may result in death or serious

injury due to electric shock.

■

To prevent damage or fire

●

Make sure bulbs are fully seated and

locked.

●

Check the wattage of the bulb before

installing to prevent heat damage.

379

When trouble

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When trouble arises

7-1. 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

warning buzzer sounds .......

388

If a warning message is displayed

........................................................

398

If you have a flat tire..................

402

If the hybrid system 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

operate properly .....................

412

If the 12-volt battery is discharged

.........................................................

414

If your vehicle overheats .........

418

If the vehicle becomes stuck .

421

380

7-1. Essential information

7-1.Essential information

Press the switch.

All the turn signal lights will flash. To turn
them off, press the switch once again.

■

Emergency flashers

If the emergency flashers are used for a

long time while the hybrid system is not

operating (while the “READY” indicator is

not illuminated), the 12-volt battery may dis-

charge.

Steadily step on the brake pedal
with both feet and firmly depress it.

Do not pump the brake pedal repeatedly

as this will increase the effort required to

slow the vehicle.

Shift the shift lever to N.



If the shift lever is shifted to N

After slowing down, stop the vehi-
cle in a safe place by the road.

Stop the hybrid system.



If the shift lever cannot be shifted to
N

Keep depressing the brake pedal
with both feet to reduce vehicle
speed as much as possible.

To stop the hybrid system, press
and hold the power switch for 2
consecutive seconds or more, or

Emergency flashers

The emergency flashers are used to
warn other drivers when the vehicle
has to be stopped in the road due to
a breakdown, etc.

Operating instructions

If your vehicle has to be
stopped in an emergency

Only in an emergency, such as if it
becomes impossible to stop the
vehicle in the normal way, stop the
vehicle using the following proce-
dure:

Stopping the vehicle

381

7-1. Essential information

When trouble

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press it briefly 3 times or more in
succession.

Stop the vehicle in a safe place by
the road.



Remove the seat belt first.



If the door can be opened, open the
door and exit the vehicle.



If the door can not be opened, open
the window using the power window
switch and exit the vehicle through
the window.



If the window can not be opened
using the power window switch,
remain calm, wait until the water
level inside the vehicle rises to the
point that the water pressure inside
of the vehicle equals the water pres-
sure outside of the vehicle, and then
open the door and exit the vehicle.

WARNING

■

If the hybrid system has to be turned

off while driving

Power assist for the steering wheel will

be lost, making the steering wheel

heavier to turn. Decelerate as much as

possible before turning off the hybrid sys-

tem.

If the vehicle is trapped in
rising water

In the event the vehicle is sub-
merged in water, remain calm and
perform the following.

WARNING

■

Using an emergency hammer

for

emergency escape

The front side windows and rear side

windows, as well as the rear window can

be shattered with an emergency ham-
mer

used for emergency escape. How-

ever, an emergency hammer can not

shatter the windshield as it is laminated

glass.

: Contact your Lexus dealer or after-

market accessory manufacturer for
further information about an emer-
gency hammer.

382

7-1. Essential information

WARNING

■

Escaping the vehicle from the window

There are cases where escaping the

vehicle from the window is not possible

due to seating position, passenger body

type, etc.
When using an emergency hammer,

consider your seat location and the size

of the window opening to ensure that the

opening is accessible and large enough

to escape.

383

7-2. Steps to take in an emergency

When trouble

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7-2.Steps to take in an emergency

If your vehicle needs to be
towed

If towing is necessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws.
If towing your vehicle with a wheel-
lift type truck, use a towing dolly.
(



P.383, 384)

WARNING

Observe the following precautions.

Failure to do so may result in death or

serious injury.

■

When towing the vehicle

Be sure to transport the vehicle with all

four wheels raised off the ground. If the

vehicle is towed with the tires contacting

the ground, the drivetrain or related

parts may be damaged, the vehicle may

fly off the truck, or electricity generated

by the operation of the motor may cause

a fire to occur depending on the nature

of the damage or malfunction.

■

While towing

●

When towing using cables or chains,

avoid sudden starts, etc., which place

excessive stress on the towing eyelets,

cables or chains. The towing eyelets,

cables or chains may become dam-

aged, broken debris may hit people,

and cause serious damage.

●

Do not turn the power switch off.

There is a possibility that the steering

wheel is locked and cannot be oper-

ated.

■

Installing towing eyelets to the vehi-

cle

Make sure that towing eyelets are

installed securely.

If not securely installed, towing eyelets

may come loose during towing.

NOTICE

■

To prevent damage to the vehicle

when towing using a wheel-lift type

truck

●

Do not tow the vehicle from the rear

when the power switch is off. The

steering lock mechanism is not strong

enough to hold the front wheels

straight.

●

When raising the vehicle, ensure ade-

quate ground clearance for towing at

the opposite end of the raised vehicle.

Without adequate clearance, the vehi-

cle could be damaged while being

towed.

■

To prevent damage to the vehicle

when towing with a sling-type truck

Do not tow with a sling-type truck, either

from the front or rear.

■

To prevent damage to the vehicle

during emergency towing

Do not secure cables or chains to the

suspension components.

384

7-2. Steps to take in an emergency

The following may indicate a problem
with your hybrid transmission. Contact
your Lexus dealer or commercial tow-
ing service before towing. (



P.383)



The hybrid system warning message
is shown on the multi-information
display and the vehicle does not
move.



The vehicle makes an abnormal
sound.



From the front

Use a towing dolly under the rear
wheels.



From the rear

Use a towing dolly under the front
wheels.

When using a flat-bed truck to trans-
port the vehicle, use tire strapping
belts. Refer to the owner’s manual of
the flat-bed truck for the tire strapping
method.

NOTICE

■

Recreational towing (behind motor

home, etc.)

Never dinghy tow your vehicle to pre-

vent causing serious damage to the

Hybrid AWD system and transmission.

(



P.173)

Situations when it is necessary to
contact dealers before towing

Towing with a wheel-lift type
truck

NOTICE

■

Towing with a sling-type truck

Do not tow with a sling-type truck to pre-

vent body damage.

Using a flatbed truck

385

7-2. Steps to take in an emergency

When trouble

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In order to suppress vehicle movement
during transportation, set the parking
brake and turn the power switch off.

If a tow truck is not available in an
emergency, your vehicle may be tem-
porarily towed using cables or chains
secured to the emergency towing eye-
lets. This should only be attempted on
hard surfaced roads for short distance
at under 18 mph (30 km/h).
A driver must be in the vehicle to steer
and operate the brakes. The vehicle’s
wheels, drivetrain, axles, steering and
brakes must be in good condition.

To have your vehicle towed by another
vehicle, the towing eyelet must be
installed to your vehicle. Install the tow-
ing eyelet by following the specified
procedure.

Take out the wheel nut wrench, flat-
head screwdriver and towing eye-
let. (



P.402)

Remove the eyelet cover using a
flathead screwdriver.

To protect the bodywork, place a rag

between the screwdriver and the vehicle

body as shown in the illustration.



Type A



Type B

Insert the towing eyelet into the
hole and tighten partially by hand.

Emergency towing

To have your vehicle towed

386

7-2. Steps to take in an emergency

Tighten down the towing eyelet
securely using a wheel nut wrench
or hard metal bar.

Securely attach cables or chains to
the towing eyelet.

Take care not to damage the vehicle body.

Enter the vehicle being towed and
start the hybrid system.

If the hybrid system does not start, turn the

power switch to ON mode.

Shift the shift lever to N and release
the parking brake.

Turn automatic mode off. (



P.184)

When the shift lever cannot be shifted:



P.181

■

While towing

If the hybrid system is off, the power assist

for the brakes and steering will not function,

making steering and braking more difficult.

■

Wheel nut wrench

Wheel nut wrench is installed in luggage

compartment. (



P.402)



Fluid leaks under the vehicle
(Water dripping from the air condi-
tioning after use is normal.)



Flat-looking tires or uneven tire
wear



Engine coolant temperature gauge
needle continually points higher
than normal



Changes in exhaust sound



Excessive tire squeal when corner-
ing



Strange noises related to the sus-
pension system



Pinging or other noises related to
the hybrid system



Engine misfire or misses, stumbling
or running roughly



Appreciable loss of power



Vehicle pulls heavily to one side
when braking

If you think something is
wrong

If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.

Visible symptoms

Audible symptoms

Operational symptoms

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