2020 Lexus LC500 overheating

3707-2. Steps to take in an emergency
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.
WARNING
●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.
If your vehicle overheats
(LC500h)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.80) 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 Reduced Output
Power” is shown on the multi-
information display.
 Steam comes out from under the
hood.
Correction procedures

Alphabetical index425
Rear Cross Traffic Alert function....... 229
C
Care ........................................................ 278, 281Aluminum wheels ...................................... 279
Exterior ........................................................... 278
Interior ...............................................................281
Seat belts..........................................................281
Cargo capacity...............................................146
Cargo hooks ................................................. 266
Center Display ............................................. 246
Chains .............................................................. 243
Child restraint system................................... 43 Fixed with a LATCH system ..................50
Fixed with a seat belt....................................47
Front passenger occupant classification system ............................................................. 38
Points to remember .................................... 43
Riding with children ..................................... 43
Types of child restraint system installation method ........................................................... 44
Using an anchor bracket .......................... 52
Child safety ....................................................... 43 12-volt battery precautions .......304, 367
Airbag precautions...................................... 33
Child restraint system................................. 44
Heated steering wheel and seat heater precautions................................................ 259
How your child should wear the seat belt ............................................................................ 25
Power window lock switch.....................135
Power window precautions ...................135
Removed electronic key battery precau- tions ............................................................... 323
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 43
Trunk precautions .........................................112
Cleaning................................................ 278, 281 Aluminum wheels ...................................... 279
Exterior ........................................................... 278
Interior ...............................................................281
Radar sensor..................................... 189, 225 Seat belts ......................................................... 281
Clock ................................................................ 268
Coat hooks..................................................... 269
Condenser ...................................................... 301
Console box .................................................. 265
Console box light ........................................ 265
Cooling system.............................................300 Engine overheating...................... 368, 370
Hybrid system overheating ....................371
Cornering lights ............................................. 177
Cruise control Dynamic radar cruise control with full-
speed range ............................................. 206
Cup holder ..................................................... 265
Current fuel consumption .......................... 86
Curtain shield airbags .................................. 28
Customizable features .............................. 395
D
Daytime running light system ................... 175
Defogger Outside rear view mirrors.....................253
Rear window ................................................253
Windshield ....................................................253
Differential ...................................................... 382
Dimension ...................................................... 376
Dinghy towing................................................. 147
Display BSM (Blind Spot Monitor).................... 223
Drive information ..........................................86
Dynamic radar cruise control with full-
speed range ............................................. 206
Energy monitor .............................................. 96
Head-up display..............................................91
Intuitive parking assist ................................ 217
LKA (Lane-Keeping Assist) .................202
Multi-information display ..........................84
Warning message .................................... 348
Distance ............................................................. 86
Do-it-yourself maintenance ....................288
Door courtesy lights ................................... 262
Door lock

Alphabetical index427
If the hybrid system will not start ........356
If your vehicle has to be stopped in an
emergency ................................................330
Ignition switch (engine switch) ............ 148
Ignition switch (power switch) ............... 151
Overheating.................................... 368, 370
Power switch .................................................. 151
Engine coolant..............................................300 Capacity ........................................................ 380
Checking ...................................................... 300
Preparing and checking before winter......................................................................... 242
Engine coolant temperature gauge ....... 80
Engine immobilizer system ........................ 68
Engine oil ........................................................ 297 Capacity ......................................................... 378
Checking ....................................................... 297
Preparing and checking before winter......................................................................... 242
Warning light ............................................... 339
Warning message.......................................351
Engine oil maintenance data .................. 299
Engine oil temperature gauge .................. 80
Engine switch (power switch) ......... 148, 151 Auto power off function ..................151, 154
Changing the engine switch (power switch) modes.................................150, 154
If your vehicle has to be stopped in an
emergency ................................................330
Starting the engine (hybrid system).................................148, 151
EPS (Electric Power Steering) .............. 235 Function .......................................................... 235
Warning light ...............................................340
EV drive mode............................................... 155
Event data recorder (EDR) ........................... 8
EV indicator ........................................................ 61
F
First-aid kit storage belt ............................ 266
Flat tire ............................................................. 354 Tire pressure warning system ............. 307 Floor mats ...........................................................22
Fluid
Automatic transmission ........................... 381
Brake ................................................................382
Hybrid transmission................................... 381
Washer ...........................................................302
Footwell light ................................................. 262
Front passenger occupant classification system .............................................................. 38
Front seats ........................................................ 122 Adjustment ...................................................... 122
Cleaning .......................................................... 281
Correct driving posture ............................ 23
Driving position memory .........................124
Head restraints.............................................. 127
Jam protection function ............................123
Memory recall function............................ 125
Seat heaters ..................................................259
Seat position memory ...............................124
Seat ventilators ............................................259
Front side marker light ................................ 175 Light switch .....................................................175
Replacing light bulbs ................................328
Front turn signal lights .................................169 Replacing light bulbs ................................328
Turn signal lever .......................................... 169
Fuel ..................................................................... 184 Capacity ......................................................... 377
Fuel gauge ....................................................... 80
Fuel pump shut off system.................... 338
Information ................................................... 385
Refueling.......................................................... 184
Type .................................................................. 377
Warning light ...............................................343
Fuel consumption Average fuel consumpt ion after refueling
.............................................................................86
Average fuel economy ..............................86
Current fuel consumption ........................86
Fuel filler door ................................................ 184 If the fuel filler do or cannot be opened
......................................................................... 358

428Alphabetical index
Refueling ......................................................... 184
Fuel gauge ......................................................... 80
Fuel pump shut off system........................ 338
Fuses ................................................................. 323
G
Garage door opener ................................. 270
Gauges ............................................................... 80
Glove box ....................................................... 264
Glove box light ............................................. 264
Grocery bag hooks .................................... 266
H
Headlights ........................................................ 175 Automatic High Beam system..............178
Light switch ..................................................... 175
Replacing light bulbs................................ 328
Headlights aim .............................................. 327
Head restraints ............................................... 127
Head-up display................................................ 91
Heated steering wheel .. ............................ 259
Heaters Air conditioning system.......................... 252
Heated steering wheel............................ 259
Outside rear view mirrors .................... 253
Seat heaters .................................................. 259
High-voltage components ......................... 63
Hill-start assist control ............................... 235
Hood ................................................................. 294 Open ............................................................... 294
Pop Up Hood ................................................ 36
Hooks Cargo hooks................................................ 266
Coat hooks ................................................... 269
Grocery bag hooks ................................. 266
Retaining hooks (floor mat)......................22
Horn ....................................................................129
Hybrid battery (traction battery) Location............................................................. 63
Specification ................................................. 378
Warning message........................................ 66 Hybrid battery (traction battery) air vents
............................................................................. 66
Hybrid system .................................................. 60 Emergency shut off system...................... 66
Energy monitor/consumption screen96
EV drive mode............................................. 155
High voltage components ....................... 63
Hybrid System Indicator ...........................95
Hybrid system precautions...................... 63
Hybrid vehicle driving tips ....................240
If the hybrid system will not start ....... 356
Overheating ...................................................371
Power (ignition) switch .............................. 151
Regenerative braking ...................................61
Starting the hybrid system ........................ 151
Vehicle proximity noti fication system. 62
Hybrid System Indicator.............................. 95
Hybrid transmission......................................163 M mode ........................................................... 168
Paddle shift switches .......................167, 168
Snow mode.....................................................167
I
I/M test ..............................................................291
IdentificationEngine.............................................................. 376
Vehicle ............................................................ 376
Ignition switch (engine switch)................ 148 Auto power off function............................. 151
Changing the engine switch modes . 150
If your vehicle has to be stopped in an emergency ................................................ 330
Starting the engine ..................................... 148
Ignition switch (power switch) .................. 151
Auto power off function........................... 154
Changing the power switch modes . 154
If your vehicle has to be stopped in an emergency ................................................ 330
Starting the hybrid system ........................ 151
Illuminated entry system ........................... 262
Immobilizer system........................................ 68
Indicators ............................................................76

430Alphabetical index
Vanity lights ..................................................268
Wattage..........................................................384
Welcome light illumination control .... 176
LKA (Lane-Keeping Assist)......................199 Operation........................................................199
Warning messages ..................................205
Lock steering column ........................149, 152
Low profile tire.............................................. 306
M
Maintenance Do-it-yourself maintenance ................. 292
General maintenance .............................288
Maintenance data...................................... 376
Maintenance requirements .................. 287
Malfunction indicator lamp ..................... 340
Master warning light .................................. 344
Meter Changing the display ................................. 83
Head-up display ............................................. 91
Indicators .......................................................... 76
Instrument panel light control ................ 83
Meters ................................................................80
Multi-information display .......................... 84
Operating the meter control switches85
Settings ..............................................................88
Warning lights ............................................. 339
Warning message.....................................348
Micro dust and pollen filter ..................... 257
Mirrors Inside rear view mirror............................. 130
Outside rear view mirror defoggers253
Outside rear view mirrors ....................... 131
Vanity mirrors..............................................268
Multi-information display ............................ 84 Audio system-linked ...................................88
Drive information .......................................... 86
Dynamic radar cruise control with full-speed range ..............................................206
Eco Driving Indicator ................................. 78
Energy monitor.............................................. 96
Gear positions ............................................... 86 G-force .............................................................. 87
Hybrid System Indicator ........................... 78
LKA (Lane-Keeping Assist) .................202
Navigation system-linked........................ 88
Rear wing position ...................................... 88
Settings.............................................................. 88
Switching the display...................................85
Tire pressure ................................................307
Warning message .................................... 348N
Noise from under vehicle ...............................6
O
Odometer ......................................................... 80
Oil
Differential oil ....... ................................. .......382
Engine oil........................................................378
Opener Fuel filler door ............................................... 184
Hood ................................................................ 294
Trunk ................................................................... 113
Outside door handle lig hts...................... 262
Outside rear view mirrors .......................... 131 Adjustment ....................................................... 131
BSM (Blind Spot Monitor).................... 223
Folding...............................................................132
Linked mirror functi on when reversing
............................................................................132
Mirror position memory ...........................124
Outside rear view mirror defoggers253
Outside temperature.................................... 80
Overheating ...................................... 368, 370
P
Paddle shift switches ....... 161, 162, 167, 168
Panic mode ..................................................... 106
Parking assist sensors (intuitive parking assist) ............................................................... 217
Parking brake..................................................170