2021 Lexus LC500h overheating

13Pictorial index
Precautions against winter season ............................................................................. P.251
To prevent freezing (windshield wiper de-icer)
*................................................. P.265
Precautions against car wash ............................. ......................................................... P.287
Fuel filler door ........................................................................................................... P.19 1
Refueling method ............................................................................................................... .P.191
Fuel type/fuel tank capacity ...... .................................................................................. P.388
Tires.......................................................................................................................... ...P.313
Tire size/inflation pressure ........................................................................................... P.393
Winter tires..........................................................................................................................P.250
Checking/rotation/tire pressure warning system............................................... P.313
Coping with flat tires........................................................................................................ P .362
Hood ......................................................................................................................... P. 302
Opening ........................................................................................................................ .......P.302
Engine oil ..................................................................................................................... ........ P.388
Coping with overheating .................................................................................... P.376, 379
Warning messages .......................................................................................................... P.356
Active rear wing
*.................................................................................................. P.240
Headlights/side marker lights/cornering lights............................................. P.181
Parking lights/daytime running lights................................................................ P.181
Turn signal lights ...................................................................................................... P.175
Tail lights .................................................................................................................... .P.181
License plate lights .................................................................................................. P.181
Back up lights
Shifting the shift lever to R .............................. ........................................................ P.164, 171
*:If equipped
Light bulbs of the exterior lights for driving
(Replacing method: P.336, Watts: P.394)
E
F
G
H
I
J
K
L
M
N

852-1. 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.405)
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.376, 379)
• 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

1534-2. Driving procedures
4
Driving
■If the 12-volt battery is discharged
The engine cannot be started using the
smart access system with push-button start.
Refer to P.370 to restart the engine.
■Electronic key battery depletion
 P.106
■Conditions affe cting operation
 P.119
■Notes for the entry function
 P.120
■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 steering wheel in either direction” will
be displayed on the multi-information dis-
play.
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.330
■Operation of the engine switch
●If the switch is no t 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.367.
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.

1574-2. Driving procedures
4
Driving
cal key, the hybrid system cannot be
started using the smart access system
with push-button start. Refer to P.368 to
start the hybrid syst em. However, if the
electronic key is carried inside the vehicle
and the doors are locked ( P.112),
hybrid system can be started.
■When the ambient temperature is low,
such as during winter driving conditions
●When starting the hybrid system, the
flashing time of the “READY” indicator
may be long. Leave the ve hicle as it is until
the “READY” indicator is steady on, as
steady means the vehicle is able to move.
●When the hybrid battery (traction bat-
tery) is extremely cold (below approxi-
mately -22°F [-30°C]) under the
influence of the outside temperature, it
may not be possible to start the hybrid
system. In this case, try to start the hybrid
system again after the temperature of the
hybrid battery increases due to the out-
side temperature increase etc.
■Sounds and vibrations specific to a
hybrid vehicle
 P.64
■If the 12-volt battery is discharged
The hybrid system cannot be started using
the smart access system with push-button
start. Refer to P.370 to restart the hybrid
system.
■Electronic key battery depletion
 P.106
■Conditions affe cting operation
 P.119
■Notes for the entry function
 P.120
■Steering lock function
●After turning the power 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 power
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Push power switch while turn-
ing steering wheel in either direction” will be displayed on the
multi-information dis-
play.
Press the power switch shortly and firmly
while turning the steering wheel left and
right.
●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. Af ter about 10 sec-
onds, the steering lock motor will resume
functioning.
■If there is a malfunction 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 ma y be malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■If the “READY” indica tor 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.68
■Electronic key battery
 P.330
■Operation of the power switch
●If the switch is no t 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

1774-2. 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.

1784-2. 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.142
■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.347
■Usage in winter time
 P.251
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.

2705-3. Using the air conditioning system
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.

3767-2. 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
your Lexus dealer as soon as possible. If
the 12-volt battery is deteriorating, con-
tinued use may cause the 12-volt battery
to emit a malodorous gas, which may be
detrimental 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 ve hicle in an emer-
gency. It cannot be used to jump start
another vehicle.
If your vehicle overheats
(LC500)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.82) 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