2020 LEXUS NX300 heating

2624-5. Using the driving support systems
LEXUS NX300 Owners Manual_USA_M78389_en
■Sounds and vibrations caused by the
ABS, brake assist, VSC, Trailer Sway
Control, TRAC and hill-start assist con-
trol systems
●A sound may be heard from the engine
compartment when the brake pedal is
depressed repeatedly, when the engine is
started or just after the vehicle begins to
move. This sound does not indicate that a
malfunction has occurred in any of these
systems.
●Any of the following conditions may
occur when the above systems are oper-
ating. None of these indicates that a mal-
function has occurred.
• Vibrations may be felt through the vehicle
body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly
after the ABS is activated.
■Active Cornering Assist operation
sounds and vibrations
When the Active Cornering Assist is oper-
ated, operation sounds and vibrations may
be generated from the brake system, but
this is not a malfunction.
■EPS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■Reduced effectiveness of the EPS sys-
tem
The effectiveness of the EPS system is
reduced to prevent the system from over-
heating when there is frequent steering
input over an extended period of time. The
steering wheel may feel heavy as a result.
Should this occur, re frain from excessive
steering input or stop the vehicle and turn
the engine off. The EPS system should
return to normal within 10 minutes.
■Automatic reactivation of TRAC, Trailer
Sway Control and VSC systems
After turning the TRAC, Trailer Sway Con-
trol and VSC systems off, the systems will
be automatically re-enabled in the following
situations:
●When the engine switch is turned off
●If only the TRAC system is turned off, the
TRAC will turn on when vehicle speed
increases
If both the TRAC and VSC systems are
turned off, automatic re-enabling will not
occur when vehicle speed increases.
■Operating conditions of Active Corner-
ing Assist
The system operates when the following
occurs.
●TRAC/VSC can operate
●The driver is attempting to accelerate
while turning
●The system detects that the vehicle is
drifting to the outer side
●The brake pedal is released
■Operating conditions of hill-start assist
control
When the following four conditions are met,
the hill-start assist control will operate:
●The shift lever is in a position other than P
or N (when starting off forward/back-
ward on an upward incline)
●The vehicle is stopped
●The accelerator pedal is not depressed
●The parking brake is not engaged
■Automatic system cancelation of hill-
start assist control
The hill-start assist control will turn off in any
of the following situations:
●The shift lever is shifted to P or N
●The accelerator pedal is depressed
●The parking brake is engaged
●2 seconds at maximum elapsed after the
brake pedal is released
WARNING
■The ABS does not operate effectively
when
●The limits of tire gripping performance
have been exceeded (such as exces-
sively worn tires on a snow covered
road).

2815-2. Using the air conditioning system and defogger
LEXUS NX300 Owners Manual_USA_M78389_en
5
Interior features
Press the rear windshield and outside
rear view mirror defogger switch.
The defoggers will automatically turn off
after a period of time.
■Windshield wiper de-icer (if
equipped)
 P.284
■When the outside temperature exceeds
75°F (24°C) and the air conditioning
system is on
●In order to reduce the air conditioning
power consumption, the air conditioning
system may switch to recirculated air
mode automatically.
This may also reduce fuel consumption.
●Recirculated air mode is selected as a
default mode when the engine switch is
turned to IGNITION ON mode.
●It is possible to switch to outside air mode
at any time by pressing the outside/recir-
culated air mode switch.
■Fogging up of the windows
●The windows will easily fog up when the
humidity in the vehicle is high. Pressing
“A/C” button or selecting “A/C” will
dehumidify the air from the outlets and
defog the windshield effectively.
●If you turn “A/C” off, the windows may
fog up more easily.
●The windows may fog up if the recircu-
lated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up by the
vehicle is still drawn into the vehicle after
closing the windows, it is recommended
that the air intake mode be set to outside air
mode and the fan speed to any setting
except off.
■Outside/recirculated air mode
●Setting to the recirculated air mode tem-
porarily is recommended in preventing
dirty air from entering the vehicle interior
and helping to cool the vehicle when the
outside air temperature is high.
●Outside/recirculated air mode may auto-
matically switch depending on the tem-
perature setting or the inside
temperature.
■Registering air conditioning settings to
electronic keys (vehicles with driving
position memory)
●Unlocking the vehicle using an electronic
key and turning the engine switch to
IGNITION ON mode will recall that
key’s registered air conditioning settings.
●When the engine switch is turned off, the
current air conditioning settings will auto-
matically be registered to the electronic
key that was used to unlock the vehicle.
●The system may not operate correctly if
more than one electr onic key is in the
vicinity or if the smart access system with
push-button start is used to unlock a pas-
senger door.
●The doors that can recall the air condi-
tioning setting when unlocked using the
smart access system with push-button
start can be changed.
* For details, con-
tact your Lexus dealer.
*: The doors that can recall the driving posi-
tion memory are changed at the same
time.
■Operation of the air conditioning sys-
tem in Eco mode
●In the Eco mode, the air conditioning sys-
tem is controlled as follows to prioritize
fuel efficiency
• Engine speed and compressor operation
controlled to restrict heating/cooling
capacity
• Fan speed restricted when automatic
mode is selected
●To improve air conditioning performance,
perform the following operations
• Adjust the fan speed
• Adjust the temperature setting
• Turn off Eco mode
●Even when the driving mode is set to Eco
mode, the air conditioning eco mode can
be turned off by selecting the
.

2885-2. Using the air conditioning system and defogger
LEXUS NX300 Owners Manual_USA_M78389_en
Vehicles with seat ventilators
Each time the switch is pressed, the opera-
tion condition changes as follows.
Hi (3 segments lit)  Mid (2 segments lit)
 Lo (1 segment lit)  Off
The indicator (amber) and level indicator
(green) light up during operation.
■Rear
Each time the switch is pressed, the
operation condition changes as fol-
lows.
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
The level indicator (amber) lights up
during operation.
■Operation condition
The seat heaters can be used when the
engine switch is in IGNITION ON mode.
Each time the switch is pressed, the
operation condition changes as fol-
lows.
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
The indicator (green) and level indicator
(green) light up during operation.
■Operation condition
The engine switch is in IGNITION ON
mode.
A
A
WARNING
■To prevent causes of overheating and
minor burn injuries
Observe the following precautions when
using a seat heater
●Do not cover the seat with a blanket or
cushion when using the seat heater.
●Do not use seat heater more than nec-
essary.
Seat ventilators (front)
A

3767-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■Brake system warning light
■Malfunction indicator lamp
■SRS warning light
Warning lightDetails/Actions
Indicates that the engine is overheating
Immediately stop the vehicle in a safe place. Continu-
ing to drive the vehicle may be dangerous.
Handling method ( P.403)
Warning lightDetails/Actions
(Yellow)
Indicates a malfunction in the electric parking brake
 Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
 The electronic engine control system;
 The electronic throttle control system; or
 The electronic automatic transmission control system
 Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
Indicates a malfunction in:
The SRS airbag system;
 The front passenger occupant classification system; or
 The seat belt pretensioner system
 Have the vehicle inspected by your Lexus dealer
immediately.

4037-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
7
When trouble arises
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2
If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3
After the engine has cooled down
sufficiently, inspect the hoses and
WARNING
●Always wash your hands after handling
the battery support, terminals, and
other battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The needle of the engine coolant
temperature gauge ( P.79)
enters the red zone, or a loss of
engine power is experienced.
(For example, the vehicle speed
does not increase.)
 “Engine Coolant Temp High” is
shown on the multi-information
display.
 Steam comes out from under the
hood.
Correction procedures

4378-2. Customization
LEXUS NX300 Owners Manual_USA_M78389_en
8
Vehicle specifications
■Driving mode select switch ( P.258)
■Eco mode (P.258)
■Vehicle customization
●When the speed linked d oor locking function and shift po sition linked door locking func-
tion are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will be locked.
• If the vehicle is started with all the doors locked, the speed linked door locking function
would not operate.
• If the vehicle is started with any door unlock ed, the speed linked door locking function will
operate.
●When the smart access system with push-button start is off, smart door unlocking cannot
be customized.
●When the doors remain closed after unlock ing the doors and the automatic door lock
function is activat ed, the signals will be generated in accordance with the Operation sig-
nal (buzzer) and the Operation sign al (emergency flashers) settings.
■In the following situations, customize mode in which the settings can be changed
through the multi-information display will automatically be turned off.
●A warning message appears after the cu stomize mode screen is displayed.
●The engine switch is turned off.
●The vehicle begins to move while the customize mode screen is displayed.
FunctionDefault settingCustomized set-
ting
Powertrain control in custom
modeNormalPowerO———Eco
Chassis control in custom
modeNormalSportO———
Air conditioning operation in
custom modeNormalEcoO———
FunctionDefault settingCustomized set-ting
Heating/coolin g operation
minimized in Eco modeOnOff——O—
ABCD
ABCD

LEXUS NX300 Owners Manual_USA_M78389_en
Alphabetical Index457
Consumption screen .................................... 92
Coolant
Capacity .............................................................411
Checking .......................................................338
Preparing and checking before winter......................................................................... 266
Warning light ............................................... 376
Cooling system............................................. 338 Engine overheating ..................................403
Cornering lights ............................................ 180
Coussins gonflables Modification et élimin ation en fin de vie
des coussins gonflables ......................448
Précautions avec les coussins gonflables latéraux ........................................................ 444
Précautions avec les coussins gonflables latéraux et rideau.................................... 444
Précautions avec les coussins gonflables pour votre enfant.................................... 444
Précautions avec les coussins gonflables rideau ........................................................... 444
Précautions générales avec les coussins gonflables ................................................... 444
Cruise control Dynamic radar cruise control with full-speed range .............................................. 225
Cup holders ................................................... 293
Curtain shield airbags .................................. 32
Customizable features ...............................427
D
Daytime running light system ................... 179
Deck board .................................................... 296
Deck under tray ........................................... 296 Defogger
Outside rear view mirrors.................... 280
Rear window ............................................... 280
Windshield ................................................... 280
Differential ........................................................ 412
Dimension ......................................................408
Dinghy towing.................................................164
Display BSM (Blind Spot Monitor)................... 250
Drive information ..........................................83
Dynamic radar cruise control with full-
speed range .............................................. 225
Head-up display........................................... 88
Intuitive parking assist ..............................236
LDA (Lane Departure Alert with steering control) ......................................................... 215
LTA (Lane Tracing Assist) ................... 206
Multi-information display .......................... 82
Warning messages.................................. 384
Do-it-yourself maintenance ......................331
Door lock Back door ....................................................... 105
Side doors ...................................................... 100
Smart access system with push-button start ................................................................... 116
Wireless remote control ........................... 97
Doors Automatic door lock ing and unlocking
system............................................................ 103
Back door ....................................................... 104
Door glasses ................................................. 138
Door lock ........................................................100
Outside rear view mirrors...................... 136
Rear door child-protectors ................... 103
Side doors ...................................................... 100

458Alphabetical Index
LEXUS NX300 Owners Manual_USA_M78389_en
Drive information ........................................... 83
Drive-start control ..............................147, 168
Driver’s seat belt reminder light ............ 379
Driver’s seat position memory .................128
Driving Break-in tips ................................................... 147
Correct posture ............................................ 25
Driving mode select switch ..................258
Procedures .....................................................146
Winter drive tips......................................... 266
Driving position memory............................128 Memory recall function ............................ 129
Dynamic radar cruise control with full- speed rangeFunction .......................................................... 225
Warning message.....................................384
E
Eco Driving Indicator.................................... 78
Eco mode........................................................ 258
EDR (Event data recorder) ............................7
Electric Power Steering (EPS) Function ..........................................................260
Warning light ................................................377
Electronic key Battery-saving function ..............................117
If the electronic key does not operate properly....................................................... 397
Replacing the battery...............................356
Emergency flashers .................................... 366
Emergency, in case of If a warning buzzer sounds .................. 375
If a warning light turns on ...................... 375
If a warning message is displayed.....384
If the battery is discharged ................... 400
If the electronic key does not operate properly....................................................... 397 If the engine will not start....................... 395
If the fuel filler do
or cannot be opened
.......................................................................... 397
If the vehicle is trapped in rising water .......................................................................... 367
If you have a flat tire ..................................387
If you lose your keys ................................ 396
If you think something is wrong.......... 373
If your vehicle becomes stuck ............ 406
If your vehicle has to be stopped in an emergency ................................................ 366
If your vehicle needs to be towed .... 369
If your vehicle overheats ....................... 403
Engine Accessory mode......................................... 166
Compartment..............................................335
Engine switch ................................................ 165
Hood ................................................................333
How to start the engine ........................... 165
Identification number .............................. 409
If your vehicle has to be stopped in an emergency ................................................ 366
Ignition switch (Engine switch) ............ 165
Overheating ................................................ 403
Engine compartment cover .................... 336
Engine coolant Capacity ............................................................ 411
Checking ...................................................... 338
Preparing and checking before winter..........................................................................266
Warning light ............................................... 376
Engine coolant temperature gauge ........79
Engine immobilizer system ........................ 68
Engine oil Capacity .......................................................... 410
Checking .......................................................336
Warning light ...............................................375