2020 Lexus LC500h engine overheat

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

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

426Alphabetical index
Doors................................................................ 108
Smart access system with push-button start ................................................................... 115
Wireless remote control......................... 106
Door pockets ................................................ 264
Doors ................................................................. 108 Automatic door lock ing and unlocking
system ............................................................... 111
Door glasses ..................................................134
Door lock........................................................ 108
Open door warning bu zzer .......... 109, 111
Outside rear view mirrors ....................... 131
Drive info 1/Drive info 2 .............................. 86
Drive information ........................................... 86
Driver’s seat position memory ................. 124 Driving position memory......................... 124
Memory recall function ............................125
Drive-start control ........................................139
Driving............................................................... 138 Break-in tips ...................................................139
Correct driving posture .............................23
Driving mode select switch .................... 216
Hybrid vehicle driving tips .................... 240
Procedures .................................................... 138
Winter drive tips......................................... 242
Driving mode select switch ....................... 216
DRS (Dynamic Rear Steering) .............. 235
Dynamic radar cruise control with full- speed range................................................ 206Warning message....................................... 214
Dynamic Rear Steering (DRS) .............. 235
E
ECB (Electronically Controlled Brake Sys- tem) ................................................................ 235
Eco drive mode .............................................. 216
Eco Driving Indicator.................................... 78
Eco Driving Indicator Light ........................ 78
EDR (Event data recorder) ........................... 8
Elapsed time ..................................................... 86
Electric motor (tractio n motor) ................ 60
Electric Power Steering (EPS) Function ..........................................................235
Warning light .............................................. 340
Electronically Controlled Brake System (ECB) ............................................................ 235
Electronic key ................................................ 104 Battery-saving function.............................. 117
If the electronic key does not operate properly ...................................................... 359
Replacing the battery ............................... 322
Emergency, in case of If a warning buzzer sounds...................339
If a warning light turns on.......................339
If a warning message is displayed .... 348
If the 12-volt battery is discharged ..... 361
If the electronic key does not operate properly ...................................................... 359
If the engine will not start....................... 355
If the fuel filler do or cannot be opened
......................................................................... 358
If the hybrid system will not start ....... 356
If the vehicle is trapped in rising water ........................................................................... 331
If you have a flat tire ..................................354
If you lose your keys ................................ 358
If you think something is wrong.......... 337
If your vehicle becomes stuck ............. 374
If your vehicle has to be stopped in an emergency ................................................ 330
If your vehicle needs to be towed .....333
If your vehicle overheats ........... 368, 370
Emergency flashers .................................... 330
Energy monitor ............................................... 96
Engine ACCESSORY mode.................... 150, 154
Compartment..............................................296
Engine switch ................................................ 148
Fuel pump shut off system.................... 338
Hood ................................................................ 294
How to start the engine ........................... 148
How to start the hybrid system.............. 151
Identification number ............................... 376
If the engine will not start....................... 355

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