2018 LEXUS NX300h warning

3737-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises WARNING●
Avoid abrupt maneuvering and brak-
ing. If the vehicle tires deteriorate, you
could lose control of the steering
wheel or the brakes.■
If a blowout or sudden air leakage
should occur
The tire pressure warning system may
not activate immediately. ■
Maintenance of the tires
Each tire, including the spare (if pro-
vided), should be checked monthly when
cold and inflated to the inflation pressure
recommended by the vehicle manufac-
turer on the vehicle placard or tire infla-
tion pressure label (tire and load
information label). (I f your vehicle has
tires of a different size than the size indi-
cated on the vehicle placard or tire infla-
tion pressure label [tire and load
information label], yo u should determine
the proper tire infl ation pressure for
those tires.)
As an added safety feature, your vehicle
has been equipped with a tire pressure
monitoring system (TPMS-tire pressure
warning system) that illuminates a low
tire pressure telltale (tire pressure warn-
ing light) when one or more of your tires
is significantly under-inflated. Accord-
ingly, when the low tire pressure telltale
(tire pressure warnin g light) illuminates,
you should stop and check your tires as
soon as possible, and inflate them to the
proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire
to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi-
ciency and tire tread life, and may affect
the vehicle’s handling and stopping abil-
ity. Please note that the TPMS (tire pressure
warning system) is not a substitute for
proper tire maintenance, and it is the
driver’s responsibility to maintain correct
tire pressure, even if under-inflation has
not reached the level to trigger illumina-
tion of the TPMS low tire pressure telltale
(tire pressure warning light).
Your vehicle has also been equipped with
a TPMS (tire pressure warning system)
malfunction indicator to indicate when
the system is not operating properly. The
TPMS (tire pressure warning system)
malfunction indicator is combined with
the low tire pressure telltale (tire pres-
sure warning light) . When the system
detects a malfunction, the telltale will
flash for approximately one minute and
then remain continuously illuminated.
This sequence will continue upon subse-
quent vehicle start-ups as long as the
malfunction exists. When the malfunction
indicator is illuminated, the system may
not be able to detect or signal low tire
pressure as intended.
TPMS (tire pressure warning system)
malfunctions may occur for a variety of
reasons, including the installation of
replacement or alternate tires or wheels
on the vehicle that prevent the TPMS
(tire pressure warning system) from func-
tioning properly. Always check the
TPMS (tire pressure warning system)
malfunction telltale after replacing one
or more tires or wheels on your vehicle to
ensure that the replacement or alternate
tires and wheels allow the TPMS (tire
pressure warning system) to continue to
function properly.
NOTICE
■
To ensure the tire pressure warning
system operates properly
Do not install tires with different specifi-
cations or makers, as the tire pressure
warning system may not operate prop-
erly.

374 7-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U If a warning message is dis-
played The multi-information display
shows warnings of system malfunc-
tions, incorrectly performed opera-
tions, and messages that indicate a
need for maintenance. When a
message is shown, perform the cor-
rection procedure appropriate to
the message.
Master warning lightThe master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.
Multi-information displayFollow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the following actions
have been performed, contact your
Lexus dealer. A
B

3757-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises The warning lights and warning buzzers op erate as follows depending on the con-
tent of the message. If a message indicates the need for inspection by a dealer, have
the vehicle inspected by your Lexus dealer immediately.
*
: A buzzer sounds the first time a message is shown on the multi-information display.
■
System warning lights
The master warning light does not come on
or flash in the following cases. Instead, a
separate system warning light will come on
along with a message shown on the multi-
information display.
●
Malfunction of the ABS
The ABS warning light comes on.
( → P.367)
●
Malfunction of the charging system
The charging system warning light comes
on. ( → P.365)
■
If “Hybrid System Overheated Reduced
Output Power” is shown
This message may be displayed when driv-
ing under severe operating conditions. (For example, when driving up a long steep hill.)
Handling method: → P.394■
If “Maintenance required for Traction
battery cooling parts at your dealer” is
shown
The filter may be clogge d, or the air intake
vents or ducts may be blocked. Have the
vehicle inspected by your Lexus dealer.
■
If “Aux Battery Low” is shown
●
When the display goes off after several
seconds *
Maintain the hybrid system operation for
more than 15 minutes and charge the 12-
volt battery.
●
When the display does not go off
Start up the hybrid system using the pro-
cedures for “If the 12-volt battery is dis-Messages and warnings System
warning
light Warning buzzer *
Warning
Comes
on ⎯ Sounds Indicates an important situation, such as
when a system related to driving is malfunc-
tioning or that danger may result if the cor-
rection procedure is not performed
⎯ Comes
on
or flashes Sounds Indicates an important situation, such as
when the systems shown on the multi-infor-
mation display may be malfunctioning
Flashes ⎯ Sounds Indicates a situation, such as when damage
to the vehicle or danger may result
Comes
on ⎯ Does not sound Indicates a condition, such as malfunction of
electrical components, their condition, or
indicates the need for maintenance
Flashes ⎯ Does not sound Indicates a situation, such as when an opera-
tion has been performed incorrectly, or indi-
cates how to perform an operation correctly

3777-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises • “Charging System Malfunction” ■
Warning buzzer
→ P.372
 Stop the vehicle in a safe place on a
hard, flat surface.
 Set the parking brake.
 Shift the shift lever to P.
 Stop the hybrid system.
 Turn on the emergency flashers.
( → P.358)NOTICE■
“High Power Consumption Partial
Limit On AC/Heater Operation” is
frequently shown
There is a possible malfunction relating
to the charging system or the 12-volt bat-
tery may be deteriorating. Have the vehi-
cle inspected by your Lexus dealer. ■
“Aux Battery Low” is frequently
shown
The 12-volt battery may have deterio-
rated. As the battery may discharge in
this state when left unattended, have the
battery inspected by your Lexus dealer. If you have a flat tire Your vehicle is equipped with a
spare tire. The flat tire can be
replaced with the spare tire.
For details about tires: → P.336WARNING■
If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat
tire can damage the tire and the wheel
beyond repair, which could result in an
accident.
Before jacking up the vehicle

378 7-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U Jack handle
Wheel nut wrench
Towing eyelet
Spare tire
Jack
ScrewdriverLocation of the spare tire, jack and tools
A
B
C
D
E
F
WARNING
■
Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause
the vehicle to suddenly fall off the jack,
leading to death or serious injury.
●
Do not use the tire jack for any pur-
pose other than replacing tires or
installing and removing tire chains.
●
Only use the tire jack that comes with
this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do
not use other tire jacks for replacing
tires on this vehicle. ●
Put the jack properly in its jack point.
●
Do not put any part of your body under
the vehicle while it is supported by the
jack.
●
Do not start the hybrid system or drive
the vehicle while the vehicle is sup-
ported by the jack.
●
Do not raise the vehicle while some-
one is inside.
●
When raising the vehicle, do not put an
object on or under the jack.
●
Do not raise the vehicle to a height
greater than that required to replace
the tire.

3797-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises 1 Open the back door.
2 Pull the lever upwards and open the
deck board. 3 Lift the deck board and remove the
hook on the backside of the deck
board.
4 Use the hook to secure the deck
board as shown in the illustration.
5 Removing the Jack.
1 Remove the rubber band.
2 Remove the cover and the jack.
When stowing the jack, close it by turning WARNING●
Use a jack stand if it is necessary to get
under the vehicle.●
When lowering the vehicle, make sure
that there is no-one near the vehicle. If
there are people nearby, warn them
vocally before lowering.
Taking out the jack

380 7-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U the handle indicated by until it does not
move anymore, stow the jack and the
cover, and press on the jack to fix with the
rubber band.
1 Remove deck under tray.
2 Loosen the center fastener that
secures the spare tire. 1 Chock the tires.
2 Slightly loosen the wheel nuts (one
turn).
3 Turn the tire jack portion by
hand until the notch of the jack is in
contact with the jack point. The jack point guides are located under
the rocker panel. They indicate the jack Taking out the spare tire
WARNING
■
When storing the spare tire
Be careful not to catch fingers or other
body parts between the spare tire and
the body of the vehicle. A
Replacing a flat tire
Flat tire Wheel chock positions
Front left-
hand side Behind the rear right-hand
side tire
Front right-
hand side Behind the rear left-hand
side tire
Rear left-hand
side In front of the front right-
hand side tire
Rear right-
hand side In front of the front left-
hand side tire
A

3817-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises point positions.
4 Install the wheel nut wrench in jack
handle.
5 Raise the vehicle until the tire is
slightly raised off the ground.
6 Remove all the wheel nuts and the
tire.When resting the tire on the ground, place
the tire so that the wh eel design faces up to avoid scratching the wheel surface.
WARNING■
Replacing a flat tire ●
Observe the following precautions.
Failure to do so may result in serious
injury:
• Do not try to remove the wheel orna-
ment by hand. Take due care in han-
dling the ornament to avoid
unexpected personal injury.
• Do not touch the disc wheels or the
area around the brakes immediately
after the vehicle has been driven.
After the vehicle has been driven the
disc wheels and the area around the
brakes will be extremely hot. Touching
these areas with hands, feet or other
body parts while changing a tire, etc.
may result in burns.