2021 Lexus LC500 cooling

3787-2. Steps to take in an emergency
3Remove the caps and .
4 Add coolant through the inlet of the cap
up to the “F” line , and then
replace the cap .
5 Add coolant through the inlet of the cap
until it is full, and then replace the
cap .
WARNING
■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.
AB
AC
A
B
B
●Keep hands and clothing (especially a
tie, a scarf or a muffler) away from the
fan and belts. Failure to do so may
cause the hands or clothing to be
caught, resulting in serious injury.
●While the engine and radiator are hot,
do not loosen or remove the coolant
inlet cap or coolant reservoir cap.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●Do not use any coolant additive.

3797-2. Steps to take in an emergency
7
When trouble arises
If the engine coolant temperature
gauge enters the red zone or
“Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information
display
1 Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the hybrid system.
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 hybrid system has cooled
down sufficiently, inspect the hoses
and cooling system for leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
Reservoir
“F” line
“L” line
Coolant inlet cap
5 Add coolant if necessary.
Water can be used in an emergency if
If your vehicle overheats
(LC500h)
The following may indicate that
your vehicle is overheating.
The engine coolant temperature
gauge ( P.82) is in the red zone
or a loss of hybrid system power is
experienced. (For example, the
vehicle speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” or “Hybrid System
Overheated Output Power
Reduced” is shown on the multi-
information display.
 Steam comes out from under the
hood.
Correction procedures
A
B
A
B
C
D

3807-2. Steps to take in an emergency
engine coolant is unavailable.
6Start the hybrid system and turn the
air conditioning system on to check
that the radiator cooling fan oper-
ates and to check for coolant leaks
from the radiator or hoses.
The fan operates when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fan is operating
by checking the fan sound and air flow. If it
is difficult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fan may not operate in freezing tem-
peratures.)
7 If the fan is not operating:
Stop the hybrid system immediately
and contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the
nearest Lexus dealer.
If “Hybrid System Overheated Out-
put Power Reduced” is shown on the
multi-information display
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 (radiato r) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir.
Reservoir
“F”/“FULL” line
“L”/“LOW” line
5 Add coolant if necessary.
Water can be used in an emergency if
A
B
A
B
C

3827-2. Steps to take in an emergency
1Stop the engine .
Set the parking brake and shift the
shift position to P.
2 Remove the mud, snow or sand
from around the rear wheels.
3 Place wood, stones or some other
material under the rear wheels to
help provide traction.
4 Restart the engine .
5 Shift the shift position to D or R and
release the parking brake. Then,
while exercising caution, depress
the accelerator pedal.
■When it is difficult to free the vehicle
Press the switch to turn off TRAC.
WARNING
●After the hybrid system has been
turned off, check that the indicator on
the power switch and the “READY”
indicator are off.
When the hybrid system is operating,
the gasoline engine may automatically
start, or the cooling fan may suddenly
operate even if the gasoline engine
stops. Do not touch or approach rotat-
ing parts such as the fan, which may
lead to fingers or clothing (especially a
tie, a scarf or a muffler) getting caught,
resulting in serious injury.
●Do not loosen the coolant inlet cap or
coolant reservoir caps while the hybrid
system and radiator are hot.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine/power control
unit coolant
Add coolant slowly after the hybrid sys-
tem has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too
quickly can cause damage to the hybrid
system.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●Do not use any coolant additive.
If the vehicle becomes stuck
Carry out the following proce-
dures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Recovering procedure

3908-1. Specifications
Outside temperature
Oil viscosity (0W-20 is explained here
as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows
cold startability. Oils with a lower
value before the W allow for easier
starting of the engine in cold
weather.
• The 20 in 0W-20 indicates the vis- cosity characteristic of the oil when
the oil is at high temperature. An oil with a higher viscosity (one with a
higher value) may be better suited if
the vehicle is operated at high
speeds, or under extreme load con-
ditions.
How to read oil container label:
The International Lubricant Specifica-
tion Advisory Committee (ILSAC)
Certification Mark is added to some oil
containers to help you select the oil you
should use.
*: The fluid capacity is a reference quantity. If replacement is necessary, contact your Lexus dealer.
A
Cooling system
Capacity*
LC50012.8 qt. (12.1 L, 10.6 Imp.qt.)
LC500h
Gasoline engine
11.5 qt. (10.9L, 9.6 Imp.qt.)
Power control unit
2.4 qt. (2.3L, 2.0 Imp.qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-
based non-silicate, non-amine, non-
nitrite, and non-borate coolant with long-
life hybrid organic acid technology
Do not use plain water alone.

436Alphabetical index
Instrument panel light control ................85
BSM (Blind Spot Monitor).........................231 Blind Spot Monitor function................. 235
Rear Cross Traffic Alert function....... 237
C
Care ...................................................... 286, 289Aluminum wheels ...................................... 287
Exterior ...........................................................286
Interior .............................................................289
Seat belts........................................................289
Cargo capacity.............................................. 150
Cargo hooks ................................................. 275
Center Display ............................................. 254
Chains ................................................................251
Child restraint system................................... 44 Fixed with a LATCH system .................... 51
Fixed with a seat belt................................... 48
Front passenger occupant classification system ............................................................. 39
Points to remember .................................... 44
Riding with children ..................................... 44
Types of child restraint system installation method ........................................................... 45
Using an anchor bracket .......................... 53
Child safety ....................................................... 44 12-volt battery precautions ......... 312, 375
Airbag precautions...................................... 33
Child restraint system................................. 45
Heated steering wheel and seat heater precautions................................................268
How your child should wear the seat belt ............................................................................ 25
Power window lock switch.....................139
Power window precautions ...................139
Removed electronic key battery precau- tions .................................................................331
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 44
Trunk precautions .........................................114
Cleaning.............................................. 286, 289 Aluminum wheels ...................................... 287 Exterior........................................................... 286
Interior ............................................................ 289
Radar sensor ..................................... 194, 233
Seat belts ....................................................... 289
Clock ........................................................ 82, 277
Coat hooks..................................................... 278
Condenser ..................................................... 309
Console box ...................................................274
Console box light .........................................274
Cooling system.............................................308 Engine overheating....................... 376, 379
Hybrid system overheating ................. 380
Cornering lights ............................................ 183
Cruise control Dynamic radar cruise control with full-
speed range ................................................214
Cup holder ......................................................274
Current fuel consumption .......................... 88
Curtain shield airbags .................................. 28
Customizable features .............................. 405
D
Daytime running light system .................... 181
Defogger Outside rear view mirrors.......................261
Rear window ..................................................261
Windshield ......................................................261
Differential ...................................................... 392
Dimension ...................................................... 386
Dinghy towing.................................................. 151
Display BSM (Blind Spot Monitor)......................231
Drive information ......................................... 88
Dynamic radar cruise control with full-
speed range ................................................214
Energy monitor ..............................................98
Head-up display............................................ 93
Intuitive parking assist .............................. 225
LKA (Lane-Keeping Assist) .................. 210
Multi-information display ..........................86
Warning message .................................... 356
Distance ............................................................. 88