2020 LEXUS NX300h remote start

3526-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78530_en
The 12-volt battery is located in the left-
hand side of luggage compartment.
■Before recharging
When recharging, the 12-volt battery pro-
duces hydrogen gas which is flammable
and explosive. Therefore, observe the fol-
lowing precautions before recharging:
●If recharging with the 12-volt battery
installed on the vehicle, be sure to discon-
nect the ground cable.
●Make sure the power switch on the char-
ger is off when connecting and discon-
necting the charger cables to the 12-volt
battery.
■After recharging/reconnecting the 12-
volt battery
●The hybrid system may not start. Follow
the procedure below to initialize the sys-
tem.
1 Shift the shift lever to P.
2 Open and close any of the doors.
3 Restart the hybrid system.
●Unlocking the doors using the smart
access system with pu sh-button start may
not be possible immediately after recon-
necting the 12-volt battery. If this hap-
pens, use the wireless remote control or
the mechanical key to lock/unlock the
doors.
●Start the hybrid system with the power
switch in ACCESSORY mode. The
WARNING
■When adding washer fluid
Do not add washer fluid when the hybrid
system is hot or operating as washer fluid
contains alcohol and may catch fire if
spilled on the engine etc.
NOTICE
■Do not use any fluid other than
washer fluid
Do not use soapy water or engine anti-
freeze instead of washer fluid.
Doing so may cause streaking on the
vehicle’s painted surfaces, as well as
damaging the pump leading to problems
of the washer fluid not spraying.
■Diluting washer fluid
Dilute washer fluid with water as neces-
sary.
Refer to the freezing temperatures listed
on the label of the washer fluid bottle.
12-volt battery
Location

3686-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78530_en
■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 operationa l 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

4107-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
■Things to check before taking measures
●Make sure that the smart access system
with push-button start has not been deac-
tivated in the customization setting. If it is
off, turn the function on.
●Check if battery-saving mode is set. If it is
set, cancel the function. ( P.127)
Use the mechanical key ( P.108) to
perform the following operations.
■Unlocking the door
1 Insert the mechanical key while
pulling on the driver’s door handle.
2 Turn the key in order to perform the
following operations.
Unlocking the door
Opens the windows and moon
roof
* (turn and hold)
Closes the windows and moon
roof
* (turn and hold)
*: This setting must be customized at your Lexus dealer
3 Remove the key, return the handle,
and then pull the handle again.
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.128) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors can be opened and the hybrid
system can be started by following
the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key related problems
Take your vehicle with all the electronic
keys provided with your vehicle, includ-
ing the card key, to your Lexus dealer.
Locking and unlocking the doors
A
B
C

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

4428-2. Customization
LEXUS NX300h Owners Manual_USA_M78530_en
Settings that can be changed by your Lexus dealer
Settings that can be changed using the vehicle switch
Definition of symbols: O = Available, – =Not available
■Door lock ( P.110, 410)
■Smart access system with push-button start and wireless remote control
( P.110, 126)
FunctionDefault settingCustomized set-
ting
Unlocking using a mechani-
cal key
Driver’s door
unlocked in first
step, all doors
unlocked in sec-
ond step
All doors
unlocked in first
step
——O—
Automatic door locking func-
tionShift position
linked door lock-
ing operationOffO—O—
Speed linked
door locking
operation
O—O—
Automatic door unlocking
function
Shift position
linked door
unlocking opera-
tionOffO—O—
Driver’s door
linked door
unlocking opera-
tion
O—O—
FunctionDefault settingCustomized set-ting
Operation signal (emergency
flashers)OnOffO—O—
Operation buzzer volume5OffO—O—1 to 7
Time elapsed before the auto-
matic door lock function is
activated if a door is not
opened after being unlocked
60 seconds
Off
O—O—30 seconds
120 seconds
Open door reminder buzzer
(When locking the vehicle)OnOff——O—
C
D
ABCD
ABCD

4438-2. Customization
LEXUS NX300h Owners Manual_USA_M78530_en
8
Vehicle specifications
■Smart access system with push-button start ( P.126)
■Wireless remote control ( P.107)
■Automatic light control system ( P.189)
FunctionDefault settingCustomized set-
ting
The doors that are unlocked
using the smart access sys-
tem with push-button start
can be selected
Driver’s doorAll the doorsO—OO
Smart access system with
push-button startOnOff——O—
Number of consecutive door
lock operations2 timesAs many as desired——O—
FunctionDefault settingCustomized set- ting
Wireless remote controlOnOff——O—
Unlocking operation
Driver’s door
unlocked in first step, all doors
unlocked in sec- ond step
All doors
unlocked in first
step
O—O—
Panic functionOnOff——O—
The function that validates the
switch of the wireless
remote control when locking
the door ( P.117)
When locking the
doorWhen unlocking
the door——O—
FunctionDefault settingCustomized set-ting
Light sensor sensitivityStandard-2 to 2O—O—
Adjust the time elapsed
before the headlights auto-
matically turn off
30 seconds
Off
O—O—60 seconds
90 seconds
ABCD
ABCD
ABCD

472Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78530_en
Display BSM (Blind Spot Monitor) ..................... 261
Drive information .......................................... 90
Dynamic radar cruise control with full-speed range .............................................. 236
Energy monitor.............................................. 99
Head-up display ........................................... 94
Intuitive parking assist.............................. 247
LDA (Lane Departure Alert with steering control) ........................................................ 226
LTA (Lane Tracing Assist)...................... 217
Multi-information display .......................... 89
Warning messages ..................................396
Do-it-yourself maintenance .................... 342
Door lock Back door......................................................... 115
Side doors ........................................................ 110
Smart access system with push-button start .................................................................. 126
Wireless remote control..........................107
Doors Automatic door lock ing and unlocking
system ............................................................. 113
Back door..........................................................114
Door glasses ................................................. 148
Door lock.......................................................... 110
Outside rear view mirrors ......................146
Rear door child-protectors ..................... 113
Side doors ........................................................ 110
Drive information ........................................... 90
Drive-start control .............................. 157, 179
Driver’s seat belt remi nder light ..............391
Driver’s seat position memory ................ 138 Driving
Break-in tips ...................................................157
Correct posture............................................. 25
Driving mode select switch ..................269
Hybrid vehicle driving tips .................... 275
Procedures .................................................... 156
Winter drive tips ......................................... 277
Driving position memory........................... 138 Memory recall function............................ 139
Dynamic radar cruise control with full- speed rangeFunction ..........................................................236
E
E-Four .............................................................. 270
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 270
Eco mode........................................................ 269
EDR (Event data recorder) ........................... 8
Electric motor Location ............................................................. 67
Specification ................................................. 423
Electric Power Steering (EPS) Function .......................................................... 270
Warning light .............................................. 388
Electronic key Battery-saving function............................. 127
If the electronic key does not operate properly ........................................................ 410
Replacing the battery .............................. 368
Electronically Controlled Brake System (ECB) ............................................................ 270

LEXUS NX300h Owners Manual_USA_M78530_en
Alphabetical Index475
Hybrid battery (traction battery)Location............................................................. 70
Specification ................................................. 424
Hybrid battery air vent ..................................72
Hybrid system ...................................................67 Emergency shut off system ......................73
Energy monitor/consumption screen99
EV drive mode ............................................. 177
High voltage components ....................... 70
Hybrid System Indicator ........................... 87
Hybrid system precautions ..................... 70
Hybrid vehicle driving tips .................... 275
If the hybrid system will not start ........ 407
Overheating...................................................416
Power switch ................................................. 174
Regenerative braking ................................. 68
Starting the hybrid system....................... 174
Vehicle proximity notification system 69
Hybrid System Indicator.............................. 87
Hybrid transmission...................................... 179
I
I/M test ............................................................ 340
Identification Engine ............................................................. 423
Vehicle ............................................................ 422
Ignition switch (Power switch) ................. 174
Illuminated entry system ...........................300
Immobilizer system .........................................75
Indicators ........................................................... 82
Initialization Items to initialize ......................................... 452
Inside rear view mirror ................................144
Instrument panel light control ................... 88
Interior lights..................................................300 Intuitive parking assist
Function .......................................................... 247
Warning message .....................................248
J
JackPositioning a floor jack ............................ 344
Vehicle-equipped jack .......................... 400
Jack handle ....................................................400
Jam protection function Moon roof ........................................................ 151
Power back door closer ........................... 121
Power windows ........................................... 148
Rear seats ........................................................137
K
Keyless entrySmart access system with push-button start ..................................................................126
Wireless remote control ......................... 107
Keys.................................................................... 106 Battery-saving function............................. 127
Electronic key ............................................... 106
Engine switch .................................................174
If the electronic key does not operate properly ........................................................ 410
If you lose your keys ................................ 409
Key number plate ....................................... 106
Keyless entry .........................................110, 126
Mechanical key ............................................ 106
Power switch..................................................174
Replacing the battery .............................. 368
Warning buzzer ........................................... 127
Wireless remote control key ................ 107
Knee airbags .................................................... 32