LEXUS NX 300 (2019 year). Manual

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6-3. Do-it-yourself maintenance

LEXUS NX300 Owners Manu-

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■

When the card key battery needs to be

replaced (if equipped)

The battery for the card key is available only

at Lexus dealers. Your Lexus dealer can

replace the battery for you.

■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart access system with push-but-

ton start and wireless remote control will

not function properly.

●

The operational range will be reduced.

Prepare the following before replacing
the battery:
 Flathead screwdriver
 Lithium battery CR2032

■

Use a CR2032 lithium battery

●

Batteries can be purchased at your Lexus

dealer, local electrical appliance shops or

camera stores.

●

Replace only with the same or equivalent

type recommended by the manufacturer.

●

Dispose of used batteries according to

the local laws.

NOTICE

■

When using the air conditioning sys-

tem

Make sure that a filter is always installed.

Using the air conditioning system without

a filter may cause damage to the system.

Electronic key battery

Replace the battery with a new one
if it is depleted.

Items to prepare

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6-3. Do-it-yourself maintenance

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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 engine 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.

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.



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

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6-3. Do-it-yourself maintenance

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

Type B

Normal fuse
Blown fuse



Type C

Normal fuse
Blown fuse



Type D

Normal fuse
Blown fuse

■

After a fuse is replaced

●

If the lights do not turn on even after the

fuse has been replaced, a bulb may need

replacement. (

P.337)

●

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.

●

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.

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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

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 1.

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.

Headlight aim

Vertical movement adjusting
bolts

Before checking the headlight
aim

A
B

Adjusting the headlight aim

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6-3. Do-it-yourself maintenance

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

Type A



Type B

P.313

Front side marker light (bulb type)
Front turn signal light (bulb type)

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

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6-3. Do-it-yourself maintenance

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■

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
 Cornering lights (if equipped)
 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.335

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

P.389)

■

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.310, 313)

Remove the cover.

Push the center of the clip

and remove

Replacing light bulbs

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6-3. Do-it-yourself maintenance

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the clip and cover

Turn the bulb base counterclock-
wise.

Remove the light bulb.

Replace the light bulb.

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

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.313)

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6-3. Do-it-yourself maintenance

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WARNING

■

Replacing light bulbs

●

Be sure to stop the engine 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.

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When trouble

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When trouble arises

7-1. Essential information

Emergency flashers..................

342

If your vehicle has to be stopped in

an emergency..........................

342

7-2. Steps to take in an emergency

If your vehicle needs to be towed

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

344

If you think something is wrong

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

348

Fuel pump shut off system .....

349

If a warning light turns on or a

warning buzzer sounds .......

350

If a warning message is displayed

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

359

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

361

If the engine will not start .......

369

If you lose your keys.................

370

If the fuel filler door cannot be

opened.........................................

371

If the electronic key does not

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

371

If the vehicle battery is discharged

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

374

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

377

If the vehicle becomes stuck

380

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7-1. Essential information

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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 engine is not operating,

the battery may discharge.

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 engine.



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 engine, press and hold
the engine switch for 2 consecutive

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

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7-1. Essential information

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When trouble

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seconds or more, or press it briefly
3 times or more in succession.

Stop the vehicle in a safe place by
the road.

WARNING

■

If the engine has to be turned off while

driving

Power assist for the brakes and steering

wheel will be lost, making the brake

pedal harder to depress and the steering

wheel heavier to turn. Decelerate as

much as possible before turning off the

engine.

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7-2. Steps to take in an emergency

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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.
2WD models: If towing your vehicle
with a wheel-lift type truck from the
front, the vehicle’s rear wheels and
axles must be in good conditions.
(

P.344, 346)

If they are damaged, use a towing
dolly or flatbed truck.
AWD models: If towing your vehi-
cle with a wheel-lift type truck, use
a towing dolly. (

P.344, 346)

WARNING

Observe the following precautions.

Failure to do so may result in death or

serious injury.

■

When towing the vehicle



2WD models

Be sure to transport the vehicle with the

front wheels raised or with all four wheels

raised off the ground. If the vehicle is

towed with the front wheels contacting

the ground, the drivetrain and related

parts may be damaged.



AWD models

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.

■

While towing

●

When towing using a 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.

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7-2. Steps to take in an emergency

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

P.344)

 The engine is running but the vehi-

cle does not move.

 The vehicle makes an abnormal

sound.

Do not tow with a sling-type truck to
prevent body damage.

WARNING

●

Do not turn the engine 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 engine 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.

■

Recreational towing (behind motor

home, etc.)

Never dinghy tow your vehicle to pre-

vent causing serious damage to the

Dynamic Torque Control AWD system

(AWD models) and transmission.

(

P.154)

Situations when it is necessary to
contact dealers before towing

Towing with a sling-type truck

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7-2. Steps to take in an emergency

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

From the front (2WD models)

Release the parking brake.



From the front (AWD models)

Use a towing dolly under the rear
wheels.



From the rear

Use a towing dolly under the front
wheels.

If your vehicle is transported by a flat-
bed truck, it should be tied down at the
locations shown in the illustration.

If you use chains or cables to tie down
your vehicle, the angles shaded in
black must be 45°.
Do not overly tighten the tie downs or
the vehicle may be damaged.

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 at most 50
miles (80 km) at under 18 mph (30
km/h).
A driver must be in the vehicle to steer

Towing with a wheel-lift type
truck

Using a flatbed truck

Emergency towing procedure

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7-2. Steps to take in an emergency

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When trouble

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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 towing eyelet.
(

P.362)

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.

Tighten down the towing eyelet
securely using a wheel nut wrench.

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 engine.

If the engine does not start, turn the engine

switch to IGNITION ON mode.

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

When the shift lever cannot be shifted:

P.159

■

While towing

If the engine is not running, the power assist

for the brakes and steering will not function,

marking steering and braking more difficult.

■

Wheel nut wrench

Wheel nut wrench is installed in luggage

compartment. (

P.362)

To have your vehicle towed

LEXUS NX 300 (2019 year). Manual - part 21