2019 LEXUS NX300H charging

3677-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
■Brake system warning light (warning buzzer)
■Charging system warning light*
*: This light illuminates on the multi-information display.
■Output control warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
(Red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicl e in a safe place and con-
tact your Lexus dealer. Continuing to drive the vehicle
may be dangerous.
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging system
 Immediately stop the vehicl e in a safe place and con-
tact your Lexus dealer. Continuing to drive the vehicle
may be dangerous.
Warning lightDetails/Actions
Indicates that the hybrid system is overheated
 P. 396

3777-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
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.369)
●Malfunction of the charging system
The charging system warning light comes
on. ( P.367)
■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.396
■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-
charged” ( P.392).
*: Displays for about 6 seconds
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SoundsIndicates 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

3797-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
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7
When trouble arises
the air intake vents of the hybrid battery
(traction battery) are not dirty, have the
vehicle inspected by your Lexus dealer.
●If the following messages are shown,
there may be a malfunction.
Immediately stop the vehicle in a safe
place and contact your Lexus dealer.
Continuing to drive the vehicle may be
dangerous.
• “Oil Pressure Low”
• “Charging System Malfunction”
■Warning buzzer
 P.374
 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.360)
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.337
WARNING
■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

3947-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
■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 gradua lly 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 battery 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 require initialization.
■When replacing the 12-volt battery
●Use a 12-volt battery that the case size is
same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent
(60Ah) or greater, and performance rat-
ing (CCA) is equivalent (460A) or
greater.
• If the sizes differ, the 12-volt battery can-
not be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and hybrid system may
not be able to start.
●After exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before
exchanging and confirm that it is firmly
connected to the hole section of the vehi-
cle.
• Use the exhaust hole plug included
with the 12-volt battery exchanged or the
one installed on the battery prior to the
exchange. (Depending on the 12-volt
battery to be exchanged, the exhaust
hole may be plugged.)
For details, consult your Lexus dealer.
C
A
B

3957-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
7
When trouble arises
WARNING
■Avoiding 12-volt battery fires or
explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the 12-
volt battery:
●Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentiona lly in contact with
any other than the intended terminal.
●Do not allow the other end of the
jumper cable connected to the “+” ter-
minal to come into contact with any
other parts or metal surfaces in the
area, such as brackets or unpainted
metal.
●Do not allow the + and - clamps of the
jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette
lighters or allow open flame near the
12-volt battery.
■12-volt Battery precautions
The 12-volt battery contains poisonous
and corrosive acidic electrolyte, while
related parts contain lead and lead com-
pounds. Observe the following precau-
tions when handling the 12-volt battery:
●When working with the 12-volt battery,
always wear safety glasses and take
care not to allow any battery fluids
(acid) to come into contact with skin,
clothing or the vehicle body.
●Do not lean over the 12-volt battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your hands after handling
the 12-volt battery support, terminals,
and other batter y-related parts.
●Do not allow children near the 12-volt
battery.
■After recharging the 12-volt battery
Have the 12-volt battery inspected at
your Lexus dealer as soon as possible.
If the 12-volt battery is deteriorating, con-
tinued use may cause the 12-volt battery
to emit a malodorous gas, which may be
detrimental to the health of passengers.
■When exchanging the 12-volt battery
After exchanging, securely attach the
exhaust hose and exhaust hole plug to
the exhaust hole of the exchanged 12-
volt battery. If not properly installed,
gases (hydrogen) may leak into the vehi-
cle interior, and there is the possible dan-
ger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to
be used when charging the 12-volt bat-
tery from another vehicle in an emer-
gency. It cannot be used to jump start
another vehicle.

4068-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_M78287_en
■Spark plug
■12-volt battery
■Charging rates
*: The fluid capacity is the quantity of reference.If replacement is necessary, contact your Lexus dealer.
Ignition system
MakeDENSO FK16HR-A8
Gap0.03 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
Specific voltage reading
at 68°F (20°C):12.0 V or higher
If the voltage is lower than the standard value,
charge the battery.
(After charging the battery, turn on the high beam
headlights for 30 seconds with the power switch
off, and turn the headlights off.)
Quick charge
Slow charge15 A max.
5 A max.
Hybrid transmission
Fluid capacity*Front
4.0 qt. (3.8 L, 3.3 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may ultimately damage
the hybrid transmission of your vehicle.

458Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_M78287_en
TRAC (Traction Control) ........................ 250
Traction battery (Hybrid battery) ............ 64 Hybrid battery (traction battery) air intake and discharge vents................... 66
Location............................................................. 64
Specification .................................................403
Warning messages ..................................... 67
Traction motor (electric motor) ................. 61
Trailer Sway Control.................................. 250
Trailer towing ........................................ 159, 167
Transmission Hybrid transmission ................................... 173
Selecting a driving mode....................... 248
Trip meters .........................................................79
Turn signal lights Replacing light bulbs................... 355, 356
Turn signal lever ........................................... 176
Wattage..........................................................409
V
Vanity lightsVanity lights ..................................................286
Wattage..........................................................409
Vanity mirrors ............................................... 286 Vanity lights ..................................................286
Vehicle data recordings ..................................7
Vehicle identification number ................ 402
Vehicle Stability Control (VSC) ........... 249
VSC (Vehicle Stabilit y Control) ........... 249
W
Warning buzzers
Approach warning.................................... 222
Downshifting ..................................................176
Intuitive parking assist ................................231
Light reminder .............................................. 183
Open door ..................................................... 105
Seat belt reminder .......................................371
Vehicle sway warning .............................. 210
Warning lights ABS .................................................................. 369
Brake hold operated indicator ...........370
Brake Override System ......................... 373
Brake system................................................ 367
Charging system........................................ 367
Drive-Start Control................................... 373
Electric power steering.......................... 369
High coolant temperature.................... 368
LDA indicator ..............................................370
Low engine oil pressure........................ 368
Low fuel level .................................................371
Malfunction indicator lamp .................. 368
Master warning light................................. 372
Parking brake indicator ............................371
PCS warning light .................................... 369
PKSB OFF indicator ................................370
Seat belt reminder light.............................371
Slip indicator .................................................370
SRS ................................................................... 369
Tire pressure ................................................ 372