overheating lexus LC500 2020 Owner's Manual / LEXUS 2020 LC500,LC500H OWNER'S MANUAL (OM11537U)

13Pictorial index
Precautions against winter season ............................................................................ P.243
To prevent freezing (windshield wiper de-icer)
*................................................. P.257
Precautions against car wash ...................................................................................... P.279
Fuel filler door ..........................................................................................................P.184
Refueling method .............................................................................................................. P .184
Fuel type/fuel tank capacity ...... ................................................................................... P.377
Tires.......................................................................................................................... .P.305
Tire size/inflation pressure ............................ ...............................................................P.383
Winter tires.......................................................................................................................... P.242
Checking/rotation/tire pressure warning system..............................................P.305
Coping with flat tires........................................................................................................ P .354
Hood ..........................................................................................................................P.294
Opening ............................................................................................................................... P.294
Engine oil ..................................................................................................................... ......... P.378
Coping with overheating ................................................................................... P.368, 370
Warning messages ..........................................................................................................P.348
Active rear wing
*.................................................................................................. P.232
Headlights/side marker lights/cornering lights............................................ P.175
Parking lights/daytime running lights............................................................... P.175
Turn signal lights ...................................................................................................... P.169
Tail lights .................................................................................................................... P.175
License plate lights ................................................................................................. P.175
Back up lights
Shifting the shift lever to R .................................................................................... P.159, 165
*:If equipped
Light bulbs of the exterior lights for driving
(Replacing method: P.328, Watts: P.384)
E
F
G
H
I
J
K
L
M
N

832-1. Instrument cluster
2
Vehicle status information and indicators
■Liquid crystal display
Small spots or light spots may appear on the
display. This phenomenon is characteristic
of liquid crystal displays, and there is no
problem continuing to use the display.
■Customization
The meter display can be customized on
the multi-information display. ( P.395)
The odometer and trip meter displays
can be switched. When the trip meter
is displayed, pressing and holding the
button will reset the trip meter. The brightness of the instrument panel
lights can be adjusted.
1
Darker
2 Brighter
■Instrument panel brightness adjustment
The instrument panel brightness levels
when the tail lights are on and off can be
adjusted individually. However, when the
surroundings are bright (daytime, etc.),
turning on the tail lights will not change the
instrument pa nel brightness.
The display can be switched between
the center and side positions.
NOTICE
■To prevent damage to the engine and
its components
●Do not let the indicator of the tachom-
eter enter the red zone, as it rep-
resents the engine speed range which
exceeds the maximum safe engine
speed.
●In the following situations, the engine
may be overheating. In this case,
immediately stop the vehicle in a safe
place, and check the engine after it has
cooled completely. ( P.368, 370)
• The engine coolant temperature gauge is in the red zone (H).
• LC500: The engine oil temperature gauge is in the red zone (H).
Changing between the odome-
ter and trip meter
Changing the Instrument panel
light brightness
Changing the display

1494-2. Driving procedures
4
Driving
■Conditions affecting operation
 P.117
■Notes for the entry function
 P.117
■Steering lock function
●After turning the engine switch off and
opening and closing the doors, the steer-
ing wheel will be lock ed due to the steer-
ing lock function. Operating the engine
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Push engine switch while turn-
ing the steering wheel in either direction”
will be displayed on the multi-information
display.
Press the engine switch shortly and firmly
while turning the steering wheel left and
right.
●To prevent the steering lock motor from
overheating, operation of the motor may
be suspended if the engine is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the engine switch. After about 10 sec-
onds, the steering lock motor will resume
functioning.
■If there is a malfun ction in the smart
access system with push-button start
If “Access System with Elec. Key Malfunc-
tion” is displayed on the multi-information
display, the system may be malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■Electronic key battery
 P.322
■Operation of the engine switch
●If the switch is not pressed shortly and
firmly, the engine switch mode may not change or the engine may not start.
●If attempting to restart the engine imme-
diately after turning th
e engine switch off,
the engine may not start in some cases.
After turning the engine switch off, please
wait a few seconds be fore restarting the
engine.
■Customization
If the smart access system with push-button
start has been deactivated in a customized
setting, refer to P.359.
WARNING
■When starting the engine
Always start the engine while sitting in
the driver’s seat. Do not depress the
accelerator pedal while starting the
engine under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury.
■Caution while driving
If engine failure occurs while the vehicle
is moving, do not lock or open the doors
until the vehicle reaches a safe and com-
plete stop. Activation of the steering lock
in this circumstance may lead to an acci-
dent, resulting in death or serious injury.
NOTICE
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start
or stalls frequently, have your vehicle
checked by your Lexus dealer immedi-
ately.
■Symptoms indicating a malfunction
with the engine switch
If the engine switch seems to be operat-
ing somewhat differently than usual, such
as the switch sticking slightly, there may
be a malfunction. Contact your Lexus
dealer immediately.

1534-2. Driving procedures
4
Driving
●To prevent the steering lock motor from
overheating, the motor may be sus-
pended if the hybrid system is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the power switch. After about 10 sec-
onds, the steering lock motor will resume
functioning.
■If there is a malfun ction in the smart
access system with push-button start
If “Access System with Elec. Key Malfunc-
tion” is displayed on the multi-information
display, the system may be malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■If the “READY” indicator does not come
on
In the event that the “READY” indicator
does not come on even after performing
the proper procedures for starting the vehi-
cle, contact your Lexus dealer immediately.
■If the hybrid system is malfunctioning
 P.66
■Electronic key battery
 P.322
■Operation of the power switch
●If the switch is not pressed shortly and
firmly, the power switch mode may not
change or the hybrid system may not
start.
●If attempting to restart the hybrid system
immediately after turning the power
switch off, the hybrid system may not start
in some cases. After turning the power
switch off, please wait a few seconds
before restarting the hybrid system.
■Customization
If the smart access sy stem with push-button
start has been deactivated in a customized setting, refer to P.359.
1
Stop the vehicle completely.
2 If the parking brake is in manual
mode, set the parking brake.
(P.170)
3 Shift the shift position to P.
(P.166)
Check that the shift position indicator
shows P. ( P.165)
4 Press the power switch.
WARNING
■When starting the hybrid system
Always start the hybrid system while sit-
ting in the driver’s seat. Do not depress
the accelerator pedal while starting the
hybrid system under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury.
■Caution while driving
If hybrid system failure occurs while the
vehicle is moving, do not lock or open the
doors until the vehicle reaches a safe and
complete stop. Activation of the steering
lock in this circumstance may lead to an
accident, resulting in death or serious
injury.
NOTICE
■When starting the hybrid system
If the hybrid system becomes difficult to
start, have your vehicle checked by your
Lexus dealer immediately.
■Symptoms indicating a malfunction
with the power switch
If the power switch seems to be operat-
ing somewhat differently than usual, such
as the switch sticking slightly, there may
be a malfunction. Contact your Lexus
dealer immediately.
Stopping the hybrid system

1714-2. Driving procedures
4
Driving
2Pull the switch to release the park-
ing brake
• Operate the parking brake switch while
depressing the brake pedal.
• Using the parking brake automatic release function, the parking brake can
be released by depressing the accelera-
tor pedal. When using this function,
slowly depress the accelerator pedal.
Make sure that the pa rking brake indicator
light turn off.
■Turning the automatic mode on
While the vehicle is stopped, press and
hold the parking brake switch until a
message is shown on the multi-infor-
mation display
When the automatic mode is turned
on, the parking brake operates as fol-
lows.
 When the shift position is shifted
from P, the parking brake will be
released, and the parking brake
indicator light turn off.
 When the shift position is shifted to
P, the parking brake will be set, and
the parking brake indicator light
turn on.
Operate the shift lever and P position
switch with the vehicle stopped and the
brake pedal depressed.
■Turning the automatic mode off
While the vehicle is stopped, pull and
hold the parking brake switch until a
message is shown on the multi-infor-
mation display
■Parking brake operation
●When the engine switch
is not in IGNITION ON mode mode>, the parking brake cannot be
released using the parking brake switch.
●When the engine switch
is not in IGNITION ON mode mode>, automatic mode (automatic
brake setting and releasing) is not avail-
able.
■Parking brake automatic release func-
tion
●When the shift position is shifted from P,
the parking brake will be released in
automatic mode.
●When all of the follo wing conditions are
met in manual mode, the parking brake
can be released by depressing the accel-
erator pedal.
• The driver’s door is closed
• The driver is wearing the seat belt
• The shift position is in D, M or R
■If “EPB frequently operated Wait a min-
ute” is displayed on the multi-informa-
tion display
If the parking brake is operated repeatedly
over a short period of time, the system may
restrict operation to prevent overheating. If
this happens, refrain from operating the
parking brake. Normal operation will return
after about 1 minute.

1724-2. Driving procedures
■If “EPB Activation Stopped Incom-
pletely” or “EPB unavailable” is dis-
played on the multi-information display
Operate the parking brake switch. If the
message does not disappear after operat-
ing the switch several times, the system may
be malfunctioning. Have the vehicle
inspected by your Lexus dealer.
■Parking brake operation sound
When the parking brake operates, a motor
sound (whirring sound) may be heard. This
does not indicate a malfunction.
■Parking brake indicator light
●Depending on the engine switch switch> mode, the pa rking brake indica-
tor light will turn on and stay on as
described below:
IGNITION ON mode :
Comes on until the parking brake is
released.
Not in IGNITION ON mode mode>: Stays on for approximately 15
seconds.
●When the engine switch
is turned off with the parking brake set,
the parking brake indi cator light will stay
on for about 15 seconds. This does not
indicate a malfunction.
■When the parking brake switch mal-
functions
Automatic mode (automatic brake setting
and releasing) will be turned on automati-
cally.
■Parking the vehicle
 P.138
■Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven
with the parking brake engaged. “EPB
applied” is displayed on the multi-informa-
tion display (with the vehicle reached a
speed of 3 mph [5 km/h]).
■If the brake system warning light comes
on
 P.339
■Usage in winter time
 P.242
WARNING
■When parking the vehicle
Do not leave a child in the vehicle alone.
The parking brake may be released unin-
tentionally and there is the danger of the
vehicle moving that may lead to an acci-
dent resulting in death or serious injury.
NOTICE
■When parking the vehicle
Before you leave the vehicle, shift the
shift position to P, set the parking brake
and make sure that the vehicle does not
move.
■When the system malfunctions
Stop the vehicle in a safe place and
check the warning messages.
■When the parking brake cannot be
released due to a malfunction
Driving the vehicle with the parking
brake set will lead to brake components
overheating, which may affect braking
performance and increase brake wear.
Have the vehicle inspected by your
Lexus dealer immediately if this occurs.

2615-3. Using the air conditioning system
5
Interior features
Display the air conditioning control
screen (P.255)
Adjust the seat heater temperature
level
Each time the switch is selected, the tem-
perature level and leve l indicator (orange)
change as follows:
AUTO  Hi  Mid  Lo  Off
Adjust the seat ventilator fan speed
level
Each time the switch is selected, the fan
speed level and leve l indicator (blue)
change as follows:
AUTO  Hi  Mid  Lo  Off
Adjust the heated steering wheel
temperature level
Each time the switch is selected, the tem-
perature level and le vel indicator change
as follows:
AUTO  Hi  Lo  Off
■The heated steering wheel, seat heaters
and seat ventilators wheel can be used
when
The engine switch is in
IGNITION ON mode .
■Air conditioning system-linked control
mode
When the seat ventilato r fan speed level is
Hi, the seat ventilator fan speed may
become higher according to the fan speed
of the air conditioning system.
■Customization
Steering wheel heating preference in auto-
matic mode and the automatic mode set-
tings for the seat heat ers and ventilators can
be changed. (Customizable features:
 P.395)
A
B
C
D
WARNING
■To prevent overheating and minor
burn injuries
Observe the following precautions when
using the seat heaters.
●Do not cover the seat with a blanket or
cushion when using the seat heater.
●Do not use seat heater more than nec-
essary.

3687-2. 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 radiator core (radiator) for any
leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
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
(LC500)
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 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
A
B
A
B
C
D

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