2018 Lexus LC500 engine overheat

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TABLE OF CONTENTS
Engine compartment...................318
12-volt battery................................ 325
Tires ................................................... 327
Replacing the tire ......................... 339
Tire inflation pressure................. 345
Wheels.............................................. 346
Air conditioning filter.................. 347
Electronic key battery ................ 349
Checking and replacing fuses 350
Light bulbs ....................................... 355
7-1. Essential information
Emergency flashers..................... 360
If your vehicle has to be stopped in
an emergency............................. 360
7-2. Steps to take in an emergency
If your vehicle needs to be towed
........................................................... 362
If you think something is wrong
........................................................... 366
Fuel pump shut off system
(LC500)....................................... 367
If a warning light turns on or a warn-
ing buzzer sounds..................... 368
If a warning message is displayed
........................................................... 378
If you have a flat tire..................... 384
If the engine will not start (LC500)
........................................................... 385
If the hybrid system will not start
(LC500h) .................................... 386
If you lose your keys .................... 388
If the fuel filler door cannot be
opened .......................................... 388
If the electronic key does not oper-
ate properly ................................. 389
If the 12-volt battery is discharged
........................................................... 392
If your vehicle overheats (LC500)
.......................................................... 400
If your vehicle overheats (LC500h)
.......................................................... 403
If the vehicle becomes stuck ... 407
8-1. Specifications
Maintenance data (fuel, oil level,
etc.) .................................................. 410
Fuel information.............................. 421
8-2. Customization
Customizable features ............... 423
8-3. Items to initialize
Items to initialize ........................... 436
What to do if... (Troubleshooting)
.......................................................... 438
Alphabetical index ....................... 441
Certification ................................... 453
7When trouble arises
8Vehicle specifications
Index

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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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4-1. Before driving
WARNING
■When starting the vehicle
LC500: Always keep your foot on the
brake pedal while stopped with the engine running. This prevents the vehicle from creeping.
LC500h: Always keep your foot on the brake pedal while stopped with the
“READY” indicator is illuminated. This prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accelera-tor pedals to avoid depressing the
wrong pedal.
• Accidentally depressing the accelera-
tor pedal instead of the brake pedal will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a difficulty in
operating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the vehicle only slightly. This allows you to depress
the brake and accelerator pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake pedal using your left foot may delay
response in an emergency, resulting in an accident.
●LC500h: The driver should pay extra attention to pedestrians when the vehi-
cle is powered only by the electric motor (traction motor). As there is no engine noise, the pedestrians may mis-
judge the vehicle’s movement.
●Do not drive the vehicle over or stop the vehicle near flammable materials.The exhaust system and exhaust gases
can be extremely hot. These hot parts may cause a fire if there is any flamma-ble material nearby.
●During normal driving, do not turn off the engine . Turning
the engine off while driving will not cause loss of steering or braking control, however, power
assist to the steering will be lost. This will make it more difficult to steer smoothly, so you should pull over and
stop the vehicle as soon as it is safe to do so. In the event of an emergency, such as if
it becomes impossible to stop the vehi- cle in the normal way: P.360
●Use engine braking (downshift) to maintain a safe speed when driving
down a steep hill. Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. ( P.173, 179)
●Do not adjust the positions of the steering wheel, the seat, or the inside or outside rear view mirrors while driv-
ing. Doing so may result in a loss of vehicle control.
●Always check that all passengers’ arms, heads or other parts of their body are not outside the vehicle.
■When driving on slippery road sur-
faces
●Sudden braking, acceleration and
steering may cause tire slippage and reduce your ability to control the vehi-cle.
●Sudden acceleration, engine braking
due to shifting, or changes in engine speed could cause the vehicle to skid, resulting in an accident.
●After driving through a puddle, lightly
depress the brake pedal to make sure that the brakes are functioning prop-erly. Wet brake pads may prevent the
brakes from functioning properly. If the brakes on only one side are wet and not functioning properly, steering con-
trol may be affected.

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4-1. Before driving
WARNING
■When the vehicle is stopped
●LC500: Do not race the engine.
If the shift position is any position other than P or N, the vehicle may acceler-ate suddenly and unexpectedly, caus-
ing an accident. LC500h: Do not depress the acceler-ator pedal unnecessarily.
If the shift position is any position other than P or N, the vehicle may acceler-ate suddenly and unexpectedly, caus-
ing an accident.
●LC500: In order to prevent accidents due to the vehicle rolling away, always keep depressing the brake pedal while
the engine is running, and apply the parking brake as necessary.LC500h: In order to prevent acci-
dents due to the vehicle rolling away, always keep depressing the brake pedal while stopped with the
“READY” indicator is illuminated, and apply the parking brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or back- ward, always depress the brake pedal and securely apply the parking brake
as needed.
●Avoid revving or racing the engine. Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter
or spray can, and may lead to a fire.
• The temperature inside the vehicle
may cause the plastic lenses and plas- tic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the interior
of the vehicle, and may also cause a short circuit in the vehicle’s electrical components.
●Do not leave cigarette lighters in the
vehicle. If a cigarette lighter is in a place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windshield or windows. Do not place
containers such as air fresheners on the instrument panel or dashboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if the curved glass is coated with a met-
allized film such as a silver-colored one. Reflected sunlight may cause the glass to act as a lens, causing a fire.

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4-1. Before driving
Driving
WARNING
●LC500:Always apply the parking brake, shift the shift position to P, stop the engine and lock the vehicle.
Do not leave the vehicle unattended while the engine is running.If the vehicle is parked with the shift
position in P but the parking brake is not set, the vehicle may start to move, possibly leading to an accident.
LC500h:Always apply the parking brake, shift the shift position to P, stop the hybrid system and lock the vehicle.
Do not leave the vehicle unattended while the “READY” indicator is illumi-nated.
If the vehicle is parked with the shift position in P but the parking brake is not set, the vehicle may start to move,
possibly leading to an accident.
●LC500: Do not touch the exhaust pipes while the engine is running or immediately after turning the engine
off. Doing so may cause burns.LC500h: Do not touch the exhaust
pipes while the “READY” indicator is illuminated or immediately after turn-ing the hybrid system off.
Doing so may cause burns.
■When taking a nap in the vehicle
Always turn the engine
off. Otherwise, if you accidentally move the shift lever or depress the accelerator pedal, this could cause an accident or fire
due to engine overheat- ing. Additionally, if the vehicle is parked in a poorly ventilated area, exhaust gases
may collect and enter the vehicle, lead- ing to death or a serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.Braking distance increases when the
brakes are wet, and this may cause one side of the vehicle to brake differently than the other side. Also, the parking
brake may not securely hold the vehi- cle.
●If the electronically controlled brake system does not operate, do not follow
other vehicles closely and avoid hills or sharp turns that require braking.In this case, braking is still possible, but
the brake pedal should be depressed more firmly than usual. Also, the brak-ing distance will increase. Have your
brakes fixed immediately.
●The brake system consists of 2 or more individual hydraulic systems; if one of the systems fails, the other(s) will still
operate. In this case, the brake pedal should be depressed more firmly than usual and the braking distance will
increase. Have your brakes fixed immediately.
NOTICE
■When driving the vehicle
●Do not depress the accelerator and brake pedals at the same time while driving, as this may restrain the engine
output.
●Do not use the accelerator pedal or depress the accelerator and brake pedals at the same time to hold the
vehicle on a hill.
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in
either direction and hold it there for an extended period of time. Doing so may damage the power
steering motor.

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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
■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]).