engine overheat lexus LC500 2018 User Guide

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7-2. Steps to take in an emergency
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
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 engine has cooled down
sufficiently, inspect the hoses and
WARNING
■After recharging the 12-volt battery
Have the 12-volt battery inspected at any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer as soon as possible. If the 12-volt battery is deteriorating, continued use may cause the 12-volt battery to emit a
malodorous gas, which may be detri- mental to the health of passengers.
■When exchanging the 12-volt battery
After exchanging, securely attach the exhaust hose and exhaust hole plug to
the exhaust hole of the exchanged 12- volt battery. If not properly installed, gases (hydrogen) may leak into the vehi-
cle interior, and there is the possible dan- ger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-gled in the cooling fan or engine drive
belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to be used when charging the 12-volt bat-tery from another vehicle in an emer-
gency. It cannot be used to jump start another vehicle.
If your vehi cle overheats
(LC500)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.88) is in the red zone
or a loss of engine power is expe-
rienced. (For example, the vehicle
speed does not increase.)
 “Engine Coolant Temp High” is
shown on the multi-information
display.
 Steam comes out from under the
hood.
Correction procedures

403
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7-2. Steps to take in an emergency
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 any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.
4 The 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.88) enters the red
zone or a loss of hybrid system
power is experienced. (For exam-
ple, 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
A
B
A
B
C
D

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7-2. Steps to take in an emergency
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 operate in freezing tem-peratures.)
7 If the fan is not operating:
Stop the hybrid system immediately
and contact any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the
nearest any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
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.
3 After 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 any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.
4 The coolant level is satisfactory if it
is between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir.
Reservoir
A
B
A

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Alphabetical index
Brake hold ........................................................189
Break-in tips .................................................... 155
Brightness control
Instrument panel light control................... 91
BSM (Blind Spot Monitor) ...................... 248
Blind Spot Monitor function................. 254
Rear Crossing Traffic Alert function 256
C
Care....................................................... 304, 307
Aluminum wheels ..................................... 305
Exterior............................................................304
Interior .............................................................307
Seat belts ........................................................307
Cargo hooks ..................................................295
Center Display .............................................. 274
Chains ................................................................ 271
Child restraint system ...................................48
Fixed with a seat belt................................... 54
Fixed with an ISOFIX rigid anchor ..... 57
Points to remember..................................... 48
Riding with children ..................................... 47
Types of child restraint system installation
method ...........................................................50
Using an anchor bracket (for top strap)
............................................................................60
Child safety ........................................................ 47
12-volt battery precautions ...... 325, 399
Airbag precautions ......................................40
Child restraint system................................. 48
Heated steering wheel and seat heater
precautions............................................... 288
How your child should wear the seat belt
............................................................................ 32
Installing child restraints ..............................51
Power window lock switch.....................152
Power window precautions .................... 151
Removed electronic key battery precau-
tions .............................................................. 350
Seat belt precautions .................................. 47
Trunk precautions......................................... 119
Cleaning .............................................. 304, 307
Aluminum wheels ..................................... 305
Exterior........................................................... 304
Interior .............................................................307
Radar sensor ................................... 208, 253
Seat belts ........................................................307
Clock................................................................. 297
Coat hooks .................................................... 298
Condenser......................................................323
Console box ...................................................294
Console box light .........................................294
Consumption screen ................................... 104
Coolant
Capacity .......................................................... 416
Checking........................................................ 322
Preparing and checking before winter
..........................................................................269
Cooling system .............................................322
Engine overheating......................400, 403
Hybrid system overheating ................. 404
Cornering lights............................................. 193
Cruise control
Cruise control..............................................239
Dynamic radar cruise control with full-
speed range .............................................. 229
Cup holder......................................................294
Current fuel consumption ...........................94
Curtain shield airbags ...................................35
Customizable features ..............................423
D
Daytime running light system.....................191
Defogger
Outside rear view mirrors...................... 281
Rear window ................................................. 281
Windshield ..................................................... 281
Differential ....................................................... 418
Dimension ........................................................410

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Alphabetical index
If you think something is wrong..........366
If your vehicle becomes stuck.............407
If your vehicle has to be stopped in an
emergency................................................ 360
If your vehicle needs to be towed ..... 362
If your vehicle overheats ...........400, 403
Emergency brake signal ...........................263
Emergency flashers.................................... 360
Energy monitor .............................................. 104
Engine
ACCESSORY mode .................... 165, 170
Compartment............................................... 318
Engine switch.................................................163
Fuel pump shut off system..................... 367
Hood ..................................................................316
How to start the engine ............................163
How to start the hybrid system.............167
Identification number .................................. 411
If the engine will not start ...................... 385
If the hybrid system will not start ....... 386
If your vehicle has to be stopped in an
emergency................................................ 360
Ignition switch (engine switch) .............163
Ignition switch (power switch) ..............167
Overheating ....................................400, 403
Power switch .................................................167
Engine coolant ..............................................322
Capacity ...........................................................416
Checking ....................................................... 324
Preparing and checking before winter
.........................................................................269
Engine coolant temperature gauge ....... 88
Engine immobilizer system .........................70
Engine oil .......................................................... 319
Capacity ...........................................................413
Checking .........................................................319
Oil level warning message .................... 381
Oil pressure warning light ................... 368
Preparing and checking before winter
.........................................................................269
Engine oil maintenance data .................... 321
Engine oil temperature gauge.................. 88
Engine switch (power switch) ........ 163, 167
Auto power off function.................166, 170
Changing the engine switch (power
switch) modes .................................165, 170
If your vehicle has to be stopped in an
emergency ................................................ 360
Starting the engine (hybrid system) 163,
167
EPS (Electric Power Steering) ...............262
Function .......................................................... 262
Warning light ...............................................370
ERA-GLONASS.........................................299
EV drive mode .................................................171
EV indicator.......................................................63
Exhaust gas precautions ..............................45
F
First-aid kit storage belt .............................295
Flat tire ............................................................. 384
Tire pressure warning system .............329
Floor mats...........................................................28
Fluid
Automatic transmission ............................417
Brake ................................................................. 418
Hybrid transmission....................................417
Washer............................................................ 324
Fog light............................................................. 196
Replacing light bulbs ............................... 356
Switch................................................................ 196
Wattage ..........................................................420
Follow me home system ............................. 192
Footwell light ................................................... 291
Front position lights
Replacing light bulbs ............................... 355
Switch.................................................................. 191
Welcome light illumination control.... 192
Front seats ........................................................138
Adjustment ..................................................... 138
Cleaning .........................................................307

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Alphabetical index
If the hybrid system will not start ....... 386
Overheating .................................................404
Power (ignition) switch .............................167
Regenerative braking ................................. 63
Starting the hybrid system.......................167
Hybrid System Indicator ............................103
Hybrid transmission ..................................... 179
M mode ........................................................... 184
Paddle shift switches .......................183, 184
Snow mode ................................................... 183
I
Identification
Engine................................................................. 411
Vehicle ............................................................. 410
Ignition switch (engine switch) ................ 163
Auto power off function .......................... 166
Changing the engine switch modes . 165
If your vehicle has to be stopped in an
emergency................................................ 360
Starting the engine ......................................163
Ignition switch (power switch) ................. 167
Auto power off function ...........................170
Changing the power switch modes ..170
If your vehicle has to be stopped in an
emergency................................................ 360
Starting the hybrid system.......................167
Immobilizer system ........................................70
Indicators ............................................................84
Initialization
Items to initialize .........................................436
Maintenance ........................................312, 321
Multi-information display .......................... 96
Power windows........................................... 150
Tire pressure warning system .............335
Inside rear view mirror................................ 146
Instrument panel light control ..................... 91
Interior lights ................................................... 291
Intrusion sensor and tilt sensor ..................78
ISOFIX rigid anchorss ..................................57
J
Jack
Positioning a floor jack ............................. 316
Vehicle-equipped jack........................... 339
Jack handle .................................................... 339
Jam protection function
Front seats ...................................................... 139
K
Keyless entry
Smart entry & start system ......................122
Wireless remote control ........................... 113
Keys ......................................................................112
Battery-saving function .............................124
Electronic key ................................................. 112
Engine switch ................................................ 163
If the electronic key does not operate
properly ...................................................... 389
If you lose your keys ................................ 388
Key number plate.......................................... 112
Keyless entry ......................................... 115, 122
Mechanical key .............................................. 112
Power switch................................................. 167
Replacing the battery...............................349
Warning buzzer ...........................................123
Wireless remote control ........................... 113
Knee airbags .....................................................35
L
Lane-Keeping Assist (LKA) ..................... 218
Operation ....................................................... 218
Warning messages................................... 224
Language (multi-information display) ....96
LDH (Lexus Dynamic Handling system)
..........................................................................263
Lever
Auxiliary catch lever .................................. 316
Hood lock release lever .......................... 316
Shift lever ............................................... 173, 179

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Alphabetical index
O
Odometer ......................................................... 88
Oil
Differential oil ................................................ 418
Engine oil .........................................................413
Opener
Fuel filler door............................................... 201
Hood ..................................................................316
Trunk ................................................................. 120
Outside door handle lights ....................... 291
Outside rear view mirrors ......................... 147
Adjustment...................................................... 147
BSM (Blind Spot Monitor) ...................248
Folding ............................................................. 148
Linked mirror function when reversing
.......................................................................... 148
Mirror position memory.......................... 140
Outside rear view mirror defoggers 281
Outside temperature display ............88, 90
Overheating...................................... 400, 403
P
Paddle shift switches...... 177, 178, 183, 184
Parking assist sensors ................................243
Parking brake ................................................. 187
Indicator.......................................................... 372
Operation ........................................................187
Parking brake engaged warning buzzer
.......................................................................... 188
Warning message...................................... 188
PCS (Pre-Collision System)..................... 210
Function ........................................................... 210
PCS OFF switch .......................................... 212
Warning light ...............................................370
Warning message..................................... 379
Personal lights ................................................ 291
Pollen removal mode ................................ 285
Pop-up display ................................................ 90
Pop Up Hood ...................................................43
Power control unit ..........................................65
Power control unit coolant.......................322
Capacity .......................................................... 416
Checking........................................................ 322
Preparing and checking before winter
..........................................................................269
Power outlet ................................................... 297
Power steering (Electric power steering
system) ..........................................................262
Warning light ...............................................370
Warning message .....................................379
Power switch (engine switch) ........ 163, 167
Auto power off function.................166, 170
Changing the power switch (engine
switch) modes .................................165, 170
If your vehicle has to be stopped in an
emergency ................................................ 360
Starting the hybrid system (engine) 163,
167
Power windows..............................................150
Door lock linked window operation ... 151
Jam protection function ............................. 151
Operation ....................................................... 150
Window lock switch.................................. 152
Pre-Collision System (PCS)..................... 210
Function ........................................................... 210
PCS OFF switch ..........................................212
Warning light ...............................................370
R
Radar cruise control (dynamic radar cruise
control with full-speed range) .............226
Radiator............................................................323
Rear turn signal lights ..................................186
Replacing light bulbs ............................... 355
Turn signal lever .......................................... 186
Rear view mirror
Inside rear view mirror ............................. 146
Outside rear view mirrors.......................147
Rear window defogger ............................... 281