coolant temperature lexus LC500 2018 User Guide

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7-2. Steps to take in an emergency
When trouble arises
■High coolant temperature warning light (warning buzzer)*
*: This light illuminates on the multi-information display.
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on a front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound even if a passenger is not
sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning
light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp w ill come on if the fuel tank becomes completely empty. If
the fuel tank is empty, refuel the vehicle immediately. The malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage temporarily drops, the electric power steering system warning lig ht may come on and the warning buzzer may sound.
■Tire pressure warning light
When a malfunction occurs in the tire pressure warning system, the tire pressure warning light blinks to warn the driver. However, if the warning light blinks for 1 minute, and then
remains illuminated, maki ng it difficult to determine whether the warning light is blinking, turn the engine switch fr om off to IGNITION ON mode and check if the warning light blinks.
■When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire inflation
pressure is at the specified level and carry out initialization. ( P.335)
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on du e to natural causes such as natural air leaks
and tire inflation pressure changes caused by temperature. In this case, adjusting the tire inflation pressure will turn off the warning light (after a few minutes).
Warning
lightWarning light/Details/Actions
Indicates that the engine coolant temperature increases
 Stop and check. (P.400, 403)

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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

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7-2. Steps to take in an emergency
2 Remove the engine cover.
3 Remove 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 .
AB
AC
A
B
B
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.
●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.

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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
When trouble arises
“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 any authorized Lexus retailer or Lexus autho-rized repairer, or any reliable repairer.
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 any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■When adding engine coolant
Add coolant in accordance with the follow- ing procedure.
1 Remove the service cover.
2 Remove the engine cover.
3 Remove 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 cap
until it is full, and then replace the
cap .
B
C
AB
AC
A
B
B

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7-2. Steps to take in an emergency
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.
●After the hybrid system has been turned off, check that the “READY” indicator is 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 damage 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.

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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
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

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Alphabetical index
VGRS (Variable Gear Ratio Steering)262
VSC (Vehicle Stability Control) ............262
W
Warning buzzers
Approach warning.................................... 235
Brake system .............................................. 368
Downshifting ................. 178, 178, 184, 185
Lexus parking assist ................................. 243
LKA (Lane-Keeping Assist) .................. 218
Open door.............................................. 116, 118
Open hood ...................................................... 118
Open trunk ...................................................... 118
Open window ................................................ 151
Pre-collision braking ................................. 210
Seat belt reminder ..................................... 373
Warning label ...................................................65
Warning lights .............................................. 368
ABS...................................................................369
Brake hold operated indicator ........... 372
Brake Override System ......................... 372
Brake pad wear .......................................... 373
Brake system ...................................368, 373
Charging system....................................... 368
Electric power steering ..........................370
High coolant temperature .................... 375
LKA (Lane-Keeping Assist) ................... 371
Low engine oil pressure........................ 368
Low fuel level ............................................... 373
Malfunction indicator lamp ...................369
Master warning light ................................ 374
Parking brake indicator .......................... 372
Pre-collision system .................................370
Seat belt reminder light........................... 373
Slip indicator................................................... 371
SRS....................................................................369
Tire pressure ................................................ 374
Warning messages......................................378
Warning reflector storage belt ..............295
Washer .............................................................. 196
Checking........................................................ 324
Headlight cleaners ..................................... 196
Preparing and checking before winter
..........................................................................269
Switch................................................................ 196
Washing and waxing ................................. 304
Weight ............................................................... 410
Wheels..............................................................346
Replacing wheels ...................................... 339
Size ..................................................................... 419
Window lock switch..................................... 152
Windows...........................................................150
Power windows ........................................... 150
Rear window defogger............................ 281
Washer............................................................. 196
Windshield wiper de-icer ........................ 284
Windshield wipers ........................................ 196
Position............................................................. 198
Rain-sensing windshield wipers .......... 196
Winter driving tips .......................................269
Wireless remote control ..............................113
Battery-Saving Function...........................124
Locking/Unlocking...................................... 113
Replacing the battery...............................349
For information regarding the
equipment listed below, refer to
the “NAVIGATION SYSTEM
OWNER’S MANUAL”.
· Audio/video system
· Navigation system
· Lexus parking assist monitor
Toyota Motor Europe NV/SA, Ave-
nue du Bourget 60 - 1140 Brus-
sels, Belgium
www.toyota-europe.com