2018 Lexus LC500 overheating

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Pictorial index
Windshield wipers................................................................................................... P.196
Precautions against winter season.............................................................................. P.271
To prevent freezing (windshield wiper de-icer)*................................................ P.284
Precautions against car wash ...................................................................................... P.305
Fuel filler door ......................................................................................................... P.201
Refueling method ............................................................................................................... P.201
Fuel type/fuel tank capacity ........................................................................................... P.412
Tires .......................................................................................................................... ..P.327
Tire size/inflation pressure ............................................................................................. P.419
Winter tires/tire chains .................................................................................................. P.269
Checking/rotation/tire pressure wa rning system ..............................................P.327
Coping with flat tires ....................................................................................................... P. 384
Hood ........................................................................................................................... P.316
Opening ........................................................................................................................ ......... P.316
Engine oil..................................................................................................................... ........... P.413
Coping with overheating .................................................................................. P.400, 403
Warning messages .......................................................................................................... P.378
Active rear wing*................................................................................................... P.259
Headlights/front position lights/daytime running lights/cornering lightsP.191
Turn signal lights ......................................................................................................P.186
Tail lights .................................................................................................................... .P.191
Stop lights
Emergency brake signal................................................................................................ P.263
License plate lights .................................................................................................. P.191
Rear fog light ............................................................................................................ P.196
Back up light
Shifting the shift lever to R...................................................................................... P.175, 181
*: If equipped
Light bulbs of the exterior lights for driving
(Replacing method: P.355, Watts: P.420)
D
E
F
G
H
I
J
K
L
M

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2-1. Instrument cluster
Vehicle status information and indicators
■Liquid crystal display
Small spots or light spots may appear on the
display. This phenomen on 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.423)
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 panel 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.400, 403)
• 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

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4-2. Driving procedures
■Electronic key battery depletion
 P.112
■Conditions affecting operation
 P.124
■Notes for the entry function
 P.124
■Steering lock function
●After turning the engine switch off and
opening and closing the doors, the steer- ing wheel will be locked due to the steer-ing lock function. Op erating 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 malfunction in the smart
entry & start system
If “Entry & Start System Malfunction” is dis-
played on the multi-information display, the system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer immediately.
■Electronic key battery
 P.349
■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 the engine switch off, the engine may not start in some cases. After turning the engine switch off, please
wait a few seconds before restarting the engine.
■Customization
If the smart entry & start system has been deactivated in a customized setting, refer to P.389.
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 any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer immediately.

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4-2. Driving procedures
on the multi-information display, read the message and follow the instructions.
■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 vehicle 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 -30°C [-22°F]) 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 entry & start system. Refer to P.393 to restart the hybrid system.
■Electronic key battery depletion
 P.112
■Conditions affecting operation
 P.124
■Note for the entry function
 P.124
■Steering lock function
●After turning the power switch off and opening and closing the doors, the steer-
ing wheel will be locked 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 the steering wheel in either direction” will be displayed on the multi-information
display. 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. After about 10 sec-onds, the steering lock motor will resume
functioning.
■If there is a malfunction in the smart entry & start system
If “Entry & Start System Malfunction” is dis- played on the multi-information display, the system may be malfunctioning. Have the
vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer 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 any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer immediately.
■If the hybrid system is malfunctioning
 P.68
■Electronic key battery
 P.349
■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

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4-2. Driving procedures
■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 , 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 following 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.
■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 any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer.
■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 mode, the parking 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.154
■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 5 km/h [3 mph]).

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4-2. Driving procedures
Driving
■If the brake system warning light comes on
 P.368
■Usage in winter time
 P.269
Press the brake hold switch to turn the
system on
The brake hold standby indicator
comes on. While the system is holding the
brake, the brake hold operated indicator
comes on.
■Brake hold system operating conditions
The brake hold system cannot be turned on
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 any autho-rized Lexus retailer or Lexus authorized
repairer, or any reliable repairer immedi- ately if this occurs.
Brake Hold
The brake hold system keeps the
brakes applied when the vehicle is
stopped by depressing the brake
pedal. This system can be used
when in a traffic jam or waiting for a
traffic light to change.
This system keeps the brake
applied when the shift position is in
D, M or N with the system on and
the brake pedal has been
depressed to stop the vehicle. The
system releases the brake when the
accelerator pedal is depressed with
the shift position in D or M to allow
smooth start off.
Enabling the system
A
B

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5-3. Using the air conditioning system
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 heaters and ventilators can
be changed. (Customizable features: P.423)
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.

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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