2020 Lexus LC500h radiator

3717-2. Steps to take in an emergency
7
When trouble arises
3After 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 engine coolant is unavailable.
6
Start 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 oper ate 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
Reduced Output Power” 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.
A
B
A
B
C
D

3727-2. Steps to take in an emergency
3After the hybrid system has cooled
down, inspect the hoses and radia-
tor core (radiator) for any 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”/“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 power control unit coolant is unavailable.
6
After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check if “Hybrid System Over-
heated Reduced Output Power” is
shown on the multi-information dis-
play.
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.
■When adding engine coolant
Add coolant in accordance with the follow-
ing procedure.
1 Remove the service cover.
2 Remove the engine cover.
A
B
A
B
C

3737-2. Steps to take in an emergency
7
When trouble arises
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
BC
B
A
A
●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 dama ge 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.

Alphabetical index431
Indicator ......................................................... 342
Operation........................................................170
Parking brake engaged warning buzzer........................................................................... 172
Warning message....................................... 172
Parking lights ................................................... 175 Light switch ..................................................... 175
Replacing light bulbs................................ 328
PCS (Pre-Collision System) .....................192 Function ............................................................ 192
PCS OFF switch ..........................................194
Warning light .................................................341
Warning message...................................... 198
Personal lights............................................... 262
Pop-up display ................................................. 82
Pop Up Hood................................................... 36
Power control unit.......................................... 63
Power control unit coolant ......................300 Capacity ........................................................ 380
Checking ...................................................... 300
Preparing and checking before winter......................................................................... 242
Power outlet .................................................. 268
Power steering (Elect ric power steering
system).......................................................... 235 Warning light ...............................................340
Warning message..................................... 349
Power switch (engine switch) ......... 148, 151 Auto power off function ..................151, 154
Changing the power switch (engine switch) modes.................................150, 154
If your vehicle has to be stopped in an
emergency ................................................330
Starting the hybrid system (engine) ................................................148, 151
Power windows ..............................................134 Door lock linked window operation..135
Jam protection function............................135
Operation........................................................ 134
Window lock switch ..................................135
Pre-Collision System (PCS) .....................192 Function ............................................................ 192 PCS OFF switch ......................................... 194
Warning light .................................................341
Warning message ...................................... 198
R
Radar cruise control (dynamic radar cruise
control with full-speed range)............. 206
Radiator ............................................................ 301
Rear side marker lights ............................... 175 Light switch .....................................................175
Replacing light bulbs ................................328
Rear turn signal lights ..................................169 Replacing light bulbs ................................328
Turn signal lever .......................................... 169
Rear view mirror Inside rear view mirror ............................. 130
Outside rear view mirrors........................ 131
Rear window defogger ............................. 253
Refueling .......................................................... 184 Capacity ......................................................... 377
Fuel types ....................................................... 377
If the fuel filler do or cannot be opened
......................................................................... 358
Opening the fuel tank cap ..................... 184
Regenerative braking ..................................... 61
Remote Touch .............................................. 246
Replacing Electronic key battery .............................. 322
Fuses................................................................. 323
Light bulbs .....................................................328
Tires ................................................................... 313
Resetting the message indicating mainte- nance is required ...................................... 287
Rev indicator ......................................................81
Rev peak............................................................. 82
Run-flat tires........................................307, 354
S
Seat belt reminder light............................. 343
Seat belts............................................................ 24 Automatic Locking Retractor................. 26