2019 Lexus LC500h overheating

3667-2. 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 index421
Rear Cross Traffic Alert function....... 226
C
Care ........................................................274, 277Aluminum wheels ...................................... 275
Exterior ........................................................... 274
Interior ..............................................................277
Seat belts.........................................................277
Cargo capacity...............................................144
Cargo hooks ................................................. 262
Center Display ............................................. 242
Chains .............................................................. 239
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 ...... 300, 363
Airbag precautions...................................... 33
Child restraint system................................. 44
Heated steering wheel and seat heater precautions................................................ 255
How your child should wear the seat belt ............................................................................ 25
Power window lock switch.....................133
Power window precautions ...................133
Removed electronic key battery precau- tions .................................................................319
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 43
Trunk precautions ........................................ 110
Cleaning................................................274, 277 Aluminum wheels ...................................... 275
Exterior ........................................................... 274
Interior ..............................................................277
Radar sensor......................................186, 222 Seat belts ........................................................ 277
Clock ................................................................ 264
Coat hooks..................................................... 265
Condenser ..................................................... 297
Console box ....................................................261
Console box light ..........................................261
Cooling system............................................. 296 Engine overheating...................... 364, 366
Hybrid system overheating .................. 367
Cornering lights ............................................. 175
Cruise control Dynamic radar cruise control with full-
speed range ..............................................203
Cup holder .......................................................261
Current fuel consumption .......................... 85
Curtain shield airbags .................................. 28
Customizable features ................................391
D
Daytime running light system ................... 173
Defogger Outside rear view mirrors..................... 249
Rear window ................................................ 249
Windshield .................................................... 249
Differential ...................................................... 378
Dimension ...................................................... 372
Dinghy towing.................................................145
Display BSM (Blind Spot Monitor)....................220
Drive information ..........................................85
Dynamic radar cruise control with full-
speed range ..............................................203
Energy monitor ..............................................95
Head-up display............................................90
Intuitive parking assist ................................214
LKA (Lane-Keeping Assist) .................. 199
Multi-information display ..........................84
Warning message ..................................... 344
Distance ............................................................. 85
Do-it-yourself maintenance .................... 284
Door courtesy lights ................................... 258

Alphabetical index423
If the engine will not start .........................351
If the hybrid system will not start ........ 352
If your vehicle has to be stopped in an
emergency ................................................ 326
Ignition switch (engine switch) .............146
Ignition switch (power switch) ..............149
Overheating.....................................364, 366
Power switch .................................................149
Engine coolant.............................................. 296 Capacity ......................................................... 376
Checking ....................................................... 296
Preparing and checking before winter
......................................................................... 238
Engine coolant temperature gauge ....... 80
Engine immobilizer system ........................ 69
Engine oil ........................................................ 293 Capacity ......................................................... 374
Checking ....................................................... 293
Preparing and checking before winter
......................................................................... 238
Warning light ...............................................335
Warning message..................................... 347
Engine oil maintenance data .................. 295
Engine oil temperature gauge .................. 80
Engine switch (power switch) ........146, 149 Auto power off function ................ 149, 152
Changing the engine switch (power
switch) modes................................. 148, 152
If your vehicle has to be stopped in an
emergency ................................................ 326
Starting the engine (hybrid system) 146,
149
EPS (Electric Power Steering) .............. 232 Function .......................................................... 232
Warning light ............................................... 336
EV drive mode................................................153
Event data recorder (EDR) ........................... 8
EV indicator ...................................................... 62
F
First-aid kit storage belt ............................ 262
Flat tire ............................................................. 350 Tire pressure warning system .............303 Floor mats ...........................................................22
Fluid
Automatic transmission .......................... 377
Brake ................................................................378
Hybrid transmission.................................. 377
Washer .......................................................... 298
Footwell light ................................................. 258
Front passenger occupant classification system .............................................................. 38
Front seats ........................................................120 Adjustment ..................................................... 120
Cleaning ......................................................... 277
Correct driving posture ............................ 23
Driving position memory ......................... 122
Head restraints............................................. 125
Jam protection function ............................. 121
Memory recall function.............................123
Seat heaters ..................................................255
Seat position memory ............................... 122
Seat ventilators ............................................255
Front side marker light ................................ 173 Light switch .....................................................173
Replacing light bulbs ................................ 324
Front turn signal lights ................................. 167 Replacing light bulbs ................................ 324
Turn signal lever ...........................................167
Fuel ......................................................................182 Capacity ......................................................... 373
Fuel gauge ....................................................... 80
Fuel pump shut off system.....................334
Information ..................................................... 381
Refueling.......................................................... 182
Type .................................................................. 373
Warning light ...............................................339
Fuel consumption Average fuel consumpt ion after refueling
.............................................................................85
Average fuel economy ..............................85
Current fuel consumption ........................85
Fuel filler door .................................................182 If the fuel filler do or cannot be opened
..........................................................................354

424Alphabetical index
Refueling ..........................................................182
Fuel gauge ......................................................... 80
Fuel pump shut off system........................ 334
Fuses ...................................................................319
G
Garage door opener ................................. 266
Gauges ............................................................... 80
Glove box ....................................................... 260
Glove box light ............................................. 260
Grocery bag hooks .................................... 262
H
Headlights ........................................................ 173 Automatic High Beam system.............. 176
Light switch ..................................................... 173
Replacing light bulbs................................ 324
Headlights aim .............................................. 323
Head restraints ...............................................125
Head-up display.............................................. 90
Heated steering wheel .. ............................ 255
Heaters Air conditioning system.......................... 248
Heated steering wheel............................ 255
Outside rear view mirrors .................... 249
Seat heaters .................................................. 255
High-voltage components ......................... 64
Hill-start assist control ............................... 232
Hood ................................................................. 290 Open ...............................................................290
Pop Up Hood ................................................ 36
Hooks Cargo hooks................................................ 262
Coat hooks ................................................... 265
Grocery bag hooks ................................. 262
Retaining hooks (floor mat)......................22
Horn .................................................................... 127
Hybrid battery (traction battery) Location............................................................. 64
Specification ................................................. 374
Warning message........................................ 67 Hybrid battery (traction battery) air vents
..............................................................................67
Hybrid system .................................................... 61 Emergency shut off system...................... 67
Energy monitor/consumption screen95
EV drive mode............................................. 153
High voltage components ....................... 64
Hybrid System Indicator ........................... 94
Hybrid system precautions...................... 64
Hybrid vehicle driving tips ....................236
If the hybrid system will not start ........352
Overheating ................................................. 367
Power (ignition) switch ............................ 149
Regenerative braking ................................. 62
Starting the hybrid system ...................... 149
Vehicle proximity noti fication system. 63
Hybrid System Indicator.............................. 94
Hybrid transmission....................................... 161 M mode ........................................................... 166
Paddle shift switches .......................165, 166
Snow mode.................................................... 165
I
I/M test ............................................................ 287
IdentificationEngine.............................................................. 372
Vehicle ............................................................ 372
Ignition switch (engine switch).................146 Auto power off function........................... 149
Changing the engine switch modes . 148
If your vehicle has to be stopped in an emergency .................................................326
Starting the engine ..................................... 146
Ignition switch (power switch) .................149
Auto power off function........................... 152
Changing the power switch modes . 152
If your vehicle has to be stopped in an emergency .................................................326
Starting the hybrid system ...................... 149
Illuminated entry system ........................... 258
Immobilizer system........................................ 69
Indicators ............................................................76

426Alphabetical index
Vanity lights .................................................. 264
Wattage......................................................... 380
Welcome light illumination control .... 174
LKA (Lane-Keeping Assist)......................196 Operation........................................................196
Warning messages .................................. 202
Lock steering column ........................147, 150
Low profile tire.............................................. 302
M
Maintenance Do-it-yourself maintenance .................288
General maintenance ............................. 284
Maintenance data...................................... 372
Maintenance requirements .................. 283
Malfunction indicator lamp ..................... 336
Master warning light .................................. 340
Meter Changing the display ................................. 83
Head-up display ........................................... 90
Indicators .......................................................... 76
Instrument panel light control ................ 83
Meters ................................................................80
Multi-information display .......................... 84
Operating the meter control switches85
Settings ..............................................................88
Warning lights ............................................. 335
Warning message..................................... 344
Micro dust and pollen filter ..................... 253
Mirrors Inside rear view mirror..............................128
Outside rear view mirror defoggers249
Outside rear view mirrors ...................... 129
Vanity mirrors.............................................. 264
Multi-information display ............................ 84 Audio system-linked ...................................88
Drive information ..........................................85
Dynamic radar cruise control with full-speed range .............................................. 203
Eco Driving Indicator ................................. 78
Energy monitor.............................................. 96
Gear positions ............................................... 86 G-force .............................................................. 87
Hybrid System Indicator ........................... 78
LKA (Lane-Keeping Assist) .................. 199
Navigation system-linked........................ 88
Rear wing position ...................................... 88
Settings.............................................................. 88
Switching the display...................................85
Tire pressure ............................................... 303
Warning message ..................................... 344N
Noise from under vehicle ...............................6
O
Odometer ......................................................... 80
Oil
Differential oil ....... ................................. .......378
Engine oil........................................................ 374
Opener Fuel filler door ............................................... 182
Hood ............................................................... 290
Trunk ..................................................................... 111
Outside door handle lig hts...................... 258
Outside rear view mirrors .........................129 Adjustment ......................................................129
BSM (Blind Spot Monitor)....................220
Folding.............................................................. 130
Linked mirror functi on when reversing
........................................................................... 130
Mirror position memory ........................... 122
Outside rear view mirror defoggers249
Outside temperature.................................... 80
Overheating .......................................364, 366
P
Paddle shift switches ..... 159, 160, 165, 166
Panic mode ..................................................... 104
Parking assist sensors (intuitive parking assist) ............................................................... 214
Parking brake................................................. 168