2020 LEXUS NX300h coolant level

3516-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78530_en
6
Maintenance and care
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
■Adding fluid
Make sure to check the fluid type and
prepare the necessary item.
 Fluid type
FMVSS No.116 DOT 3 or SAE J1703;
FMVSS No.116 DOT 4 or SAE J1704
brake fluid
Items
Clean funnel
■Brake fluid can absorb moisture from
the air
Excess moisture in the brake fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid.
If none of the washer do not work or
the “Windshield Washer Fluid Low” on
the multi-information display, the
washer tank may be empty. Add
washer fluid.
WARNING
■When the electric cooling fans are
operating
Do not touch the engine compartment.
With the power switch in ON mode, the
electric cooling fans may automatically
start to run if the air conditioning is on
and/or the coolant temperature is high.
Be sure the power switch is off when
working near the electric cooling fans or
radiator grille.
Checking and adding the brake
fluid
WARNING
■When filling the reservoir
Take care as brake fluid can harm your
hands and eyes and damage painted sur-
faces.
If fluid gets on your hands or in your eyes,
flush the affected area with clean water
immediately.
If you still experience discomfort, see a
doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go
down slightly as the brake pads wear out
or when the fluid leve l in the accumulator
is high.
If the reservoir needs frequent refilling,
there may be a serious problem.
Checking and adding the washer
fluid

4177-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
7
When trouble arises
and radiator core (radiator) for any
leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
6
Start the hybrid system and turn the
air conditioning system on to check
that the radiator cooling fans oper-
ate and to check for coolant leaks
from the radiator or hoses.
The fans operate when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fans are oper-
ating by checking the fan sound and air
flow. If it is difficult to check these, turn the
air conditioning system on and off repeat-
edly.
(The fans may not oper ate in freezing tem-
peratures.)
7 If the fans are not operating:
Stop the hybrid system immediately
and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the
nearest Lexus dealer.
8 Check if “Engine Coolant Temp
High” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Lexus dealer.
A
B
A
B
C

4187-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78530_en
■If “Hybrid System Overheated” is
shown on the multi-information dis-
play
1 Stop the vehicle in a safe place.
2 Stop the hybrid system and care-
fully lift the hood.
3 After the hybrid system has cooled
down, inspect the hoses and radia-
tor core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir “FULL” line
“LOW” line 5
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
6After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check if “Hybrid System Over-
heated” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact your
Lexus dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be driven
normally.
However, if the message appears again fre-
quently, contact your Lexus dealer.
A
B
A
B
C
WARNING
■To prevent an accident or injury when
inspecting under the hood of your
vehicle
Observe the following precautions.
Failure to do so may result in serious
injury such as burns.
●If steam is seen coming from under the
hood, do not open the hood until the
steam has subsided. The engine com-
partment may be very hot.

482Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78530_en
W
Warning buzzers Approach warning.................................... 242
Downshifting ..................................................182
Intuitive parking assist................................251
Light reminder.............................................. 190
Open door......................................................... 111
Seat belt reminder.......................................391
Vehicle sway warning ................... 221, 230
Warning lights ABS ................................................................. 388
Brake hold operated indicator ...........390
Brake Override System ......................... 393
Brake system ...............................................386
Charging system .......................................386
Drive-Start Control .................................. 393
Electric power steering ......................... 388
High coolant temperature .................... 387
LDA indicator..............................................389
Low engine oil pressure......................... 387
Low fuel level .................................................391
LTA indicator ...............................................389
Malfunction indicator lamp................... 387
Master warning light ................................ 392
Parking brake indicator ..........................390
PCS warning light .....................................389
PKSB OFF indicator ................................390
Seat belt reminder light ............................391
Slip indicator ................................................390
SRS................................................................... 388
Tire pressure ................................................ 392
Warning messages ..................................... 396 Washer
Checking ........................................................ 351
Low washer fluid warning message 351, 396
Preparing and checking before winter .......................................................................... 277
Switch....................................................195, 200
Washing and waxing.................................. 330
Weights Cargo capacity ........................ 161, 164, 422
Load limits ..................................................... 422
Weights .......................................................... 422
Wheels ............................................................. 365 Replacing wheels ...................................... 365
Size ....................................................................428
Window glasses ............................................ 148
Window lock switch .....................................149
Windows Power windows ........................................... 148
Rear window defogger.......................... 290
Washer ................................................195, 200
Windshield wiper de-icer ........................ 294
Windshield wipers Intermittent windshield wipers ............. 195
Rain-sensing windshield wipers ...........197
Winter driving tips........................................277
Wireless charger ...........................................312
Wireless remote control key ....................107 Battery-saving function............................. 127
Locking/Unlocking ................................... 107
Panic mode ....................................................108
Replacing the battery .............................. 368