2020 LEXUS NX300 engine overheat

1744-2. Driving procedures
LEXUS NX300 Owners Manual_USA_M78389_en
the switch again. (P.379)
■Parking brake operation
●When the engine switch is not in IGNI-
TION ON mode, the parking brake can-
not be released using the parking brake
switch.
●When the engine switch is not in IGNI-
TION ON mode, automatic mode (auto-
matic brake setting and releasing) is not
available.
■If “Parking Brake Overheated Parking
Brake Unavailable” is displayed on the
multi-information display
If the parking brake is operated repeatedly
over a short period of time, the system may
restrict operation to prevent overheating. If
this happens, refrain from operating the
parking brake. Normal operation will return
after about 1 minute.
■Parking brake operation sound
When the parking brake operates, a motor
sound (whirring sound) may be heard. This
does not indicate a malfunction.
■Parking brake indicator light and park-
ing brake lamp
●Depending on the engine switch mode,
the parking brake indicator light and
parking brake lamp will turn on and stay
on as described below:
IGNITION ON mode: Comes on until
the parking brake is released.
Not in IGNITION ON mode: Stays on
for approximately 15 seconds.
●When the engine switch is turned off with
the parking brake set, the parking brake
indicator light and parking brake lamp
will stay on for about 15 seconds. This
does not indicate a malfunction.
■Changing the mode
When changing the automatic mode on/off,
the message will be shown on the multi-
information display and the buzzer sounds.
■Parking the vehicle
 P.146
■Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven with the parking brake engaged. “Release
Parking Brake” is displayed on the multi-
information display.
■Warning messages and buzzers
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution. If a warn-
ing message is shown on the multi-informa-
tion display, read the message and follow
the instructions.
■If the brake system warning light comes
on
 P.376
■Usage in winter time
 P.267
WARNING
■When parking the vehicle
Do not leave a child in the vehicle alone.
The parking brake may be released unin-
tentionally and there is the danger of the
vehicle moving that may lead to an acci-
dent resulting in death or serious injury.
■Parking brake switch
Do not set any objects near the parking
brake switch. Objects may interfere with
the switch and may lead the parking
brake to unexpectedly operate.
NOTICE
■When parking the vehicle
Before you leave the vehicle, shift the
shift lever to P, set the parking brake and
make sure that the vehicle does not
move.
■When the system malfunctions
Stop the vehicle in a safe place and
check the warning messages.

1894-3. Operating the lights and wipers
LEXUS NX300 Owners Manual_USA_M78389_en
4
Driving
Operating the switch operates
the rear wiper as follows:
Type A
1
Off
2
Intermittent operation
3
Normal operation
WARNING
■Caution regarding the use of wind-
shield wipers in AUTO mode (vehi-
cles with rain-sen sing windshield
wipers)
The windshield wipers may operate
unexpectedly if the sensor is touched or
the windshield is subject to vibration in
AUTO mode. Take care that your fingers,
etc. do not become caught in the wind-
shield wipers.
■Caution regarding the use of washer
fluid
When it is cold, do not use the washer
fluid until the windshield becomes warm.
The fluid may freeze on the windshield
and cause low visibility. This may lead to
an accident, resulting in death or serious
injury.
NOTICE
■When the washer fluid tank is empty
Do not operate the switch continually as
the washer fluid pump may overheat.
■When a nozzle becomes blocked
In this case, contact your Lexus dealer.
Do not try to clear it with a pin or other
object. The nozzle will be damaged.
■To prevent battery discharge
Do not leave the wipers on longer than
necessary when the engine is off.
Rear window wiper and
w
asher
NOTICE
■When the rear window is dry
Do not use the wiper, as it may damage
the rear window.
Operating the wiper lever

1904-3. Operating the lights and wipers
LEXUS NX300 Owners Manual_USA_M78389_en
4 Washer/wiper dual opera-
tion
Pushing the lever operates the wiper and
washer.
The wiper will automatically operate a cou-
ple of times after the washer squirts.
Type B
1
Off
2
Intermittent operation
3
Normal operation 4
Washer/wiper dual opera-
tion
Pushing the lever oper ates the wiper and
washer.
The wiper will automatically operate a cou-
ple of times after the washer squirts.
■The rear window wiper and washer can
be operated when
The engine switch is in IGNITION ON
mode.
NOTICE
■When the washer fluid tank is empty
Do not operate the switch continually as
the washer fluid pump may overheat.
■When a nozzle becomes blocked
In this case, contact your Lexus dealer.
Do not try to clear it with a pin or other
object. The nozzle will be damaged.
■To prevent battery discharge
Do not leave the wiper on longer than
necessary when the engine is off.

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

365
LEXUS NX300 Owners Manual_USA_M78389_en
7
7
When trouble arises
When trouble arises
7-1. Essential information
Emergency flashers.................. 366
If your vehicle has to be stopped in an emergency .......................... 366
If the vehicle is trapped in rising water............................................ 367
7-2. Steps to take in an emergency If your vehicle needs to be towed........................................................ 369
If you think something is wrong ........................................................ 373
Fuel pump shut off system ..... 374
If a warning light turns on or a warning buzzer sounds ....... 375
If a warning message is displayed ........................................................ 384
If you have a flat tire.................. 387
If the engine wi ll not start .......395
If you lose your keys ................. 396
If the fuel filler door cannot be opened........................................ 397
If the electronic key does not operate properly .................... 397
If the vehicle battery is discharged ........................................................ 400
If your vehicle overheats ........ 403
If the vehicle becomes stuck 406

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

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