engine lexus LC500 2018 Repair Manual

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4-1. Before driving
4-1.Before driving
■Starting the engine tem>
 P.163, 167
■Driving
1 With the brake pedal depressed,
shift the shift position to D. ( P.175,
181)
Check that the shift position indicator shows D.
2 If the parking brake is in manual
mode, release the parking brake.
( P.187)
3 Gradually release the brake pedal
and gently depress the accelerator
pedal to accelerate the vehicle.
■Stopping
1 With the shift position in D, depress
the brake pedal.
2 If necessary, set the parking brake.
If the vehicle is to be stopped for an
extended period of time, shift the shift posi- tion to P. ( P.175, 181)
■Parking the vehicle
1 Stop the vehicle completely.
2 If the parking brake is in manual
mode, set the parking brake.
( P.187)
3 Shift the shift position to P. (P.175,
182)
Check that the shift position indicator shows P.
4 Press the engine switch switch> to stop the engine system>.
5 Slowly release the brake pedal.
6 Lock the door, making sure that you
have the electronic key on your
person.
If parking on a hill, block the wheels as
needed.
■Starting off on a steep uphill
1 Make sure that the parking brake is
set with the brake pedal depressed,
and then shift the shift position to D.
The hill-start assist control will be activated.
( P.262)
2Release the brake pedal and gently
depress the accelerator pedal.
3 Release the parking brake.
■For fuel-efficient driving (LC500h)
Keep in mind that hybrid vehicles are similar
to conventional vehicles, and it is necessary to refrain from activities such as sudden acceleration, etc. Refer to “Hybrid vehicle
driving tips”. ( P.267)
■Driving in the rain
●Drive carefully when it is raining, because
visibility will be reduced, the windows may become fogged-up, and the road will be slippery.
●Drive carefully when it starts to rain, because the road surface will be espe-
cially slippery.
●Refrain from high speeds when driving on
an expressway in the rain, because there may be a layer of water between the tires and the road surface, preventing the
steering and brakes from operating prop- erly.
Driving the vehicle
The following procedures should be
observed to ensure safe driving:
Driving procedure

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4-1. Before driving
Driving
■Engine speed while driving
In the following conditions, the engine
speed may become high while driving. This is due to automatic up-shifting control or down-shifting implementation to meet driv-
ing conditions. It does not indicate sudden acceleration.
●The vehicle is judged to be driving uphill or downhill
●When the accelerator pedal is released
●When the brake pedal is firmly or quickly
depressed
■Restraining the engine output (Brake Override System)
●When the accelerator and brake pedals are depressed at the same time, the engine output may be
restrained.
●A warning message is displayed on the
multi-information display while the sys- tem is operating. ( P.378)
■Restraining sudden start (Drive-Start Control)
●When the following unusual operation is
performed, the engine output may be restrained.• When the shift position is shifted from R
to D, D or M to R, N to R, P to D*, or P to
R* with the accelerator pedal depressed,
a warning message appears on the multi- information display. If a warning message is shown on the multi-information display,
read the message and follow the instruc- tions.• When the accelerator pedal is depressed
too much while the vehicle is in reverse.*: Depending on the situation, the shift posi-
tion may not be changed.
●While Drive-Start Control is being acti- vated, your vehicle may have trouble escaping from the mud or fresh snow. In
such case, deactivate TRC ( P.263) to cancel Drive Start Control so that the vehicle may become able to escape from
the mud or fresh snow.
■Breaking in your new Lexus
To extend the life of the vehicle, observing
the following precautions is recommended:
●For the first 300 km (186 miles):
Avoid sudden stops.
●For the first 1000 km (621 miles):
• Do not drive at extremely high speeds. • Avoid sudden acceleration.• Do not drive continuously in low gears.
• Do not drive at a constant speed for extended periods.
■Drum-in-disc type parking brake system
Your vehicle has a drum-in-disc type park- ing brake system. This type of brake system needs bedding-down of the brake shoes
periodically or whenever the parking brake shoes and/or drum are replaced. Have any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer, per- form the bedding down operation.
■Operating your vehicle in a foreign country
Comply with the relevant vehicle registra- tion laws and confirm the availability of the
correct fuel. ( P.412)
■Brake pads and discs
The brake pads and discs are designed for use under high load conditions. Therefore, brake noise may be generated depending
on the vehicle speed, braking force and vehicle environment (temperature, humid-ity, etc.).
WARNING
Observe the following precautions. Failure to do so may result in death or serious injury.

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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
Driving
WARNING
■When shifting the shift position
●LC500: Do not let the vehicle roll
backward while a forward driving posi- tion is selected, or roll forward while the shift position is in R.
Doing so may cause the engine to stall or lead to poor brake and steering performance, resulting in an accident
or damage to the vehicle. LC500h: Do not let the vehicle roll backward while a forward driving posi-
tion is selected, or roll forward while the shift position is in R. Doing so may result in an accident or
damage to the vehicle.
●Do not shift the shift position to P while the vehicle is moving. Doing so can damage the transmission
and may result in a loss of vehicle con- trol.
●Do not shift the shift position to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle con-trol.
●Do not shift the shift position to a driv-
ing position while the vehicle is moving backward. Doing so can damage the transmission
and may result in a loss of vehicle con- trol.
●LC500: Changing the shift position to N while the vehicle is moving will dis-
engage the engine from the transmis- sion. Engine braking is not available when N is selected.
LC500h: Changing the shift position to N while the vehicle is moving will disengage the hybrid system. Engine
braking is not available with the hybrid system disengaged.
●Be careful not to change the shift posi-tion with the accelerator pedal
depressed. Changing the shift position to any positions other than P or N may lead to
unexpected rapid acceleration of the vehicle that may cause an accident and result in death or serious injury.
After changing the shift position, make sure to confirm the current shift posi-tion displayed on the shift position indi-
cator inside the meter.
■Brake pad wear
If any of the following situations occur,
have the brake pads checked and replaced by any authorized Lexus retailer or Lexus authorized repairer, or
any reliable repairer as soon as possible.
●If the thickness of the brake pads
exceeds the brake pad wear limit when visually checking all four brake pads (for the brake pad wear limit, refer to
P.418)
●If “Brake Pad Wear Visit Your Dealer”
is displayed (only the right-side pads can be detected)
Rotor damage may result if the pads are not replaced when needed. Moderate
levels of the brake pad and disc wear allow enhanced braking power. As a result, the discs may wear more quickly
than conventional brake discs. Therefore, when replacing the brake pads, Lexus recommends that you also have the
thickness of the discs measured. It is dan- gerous to drive the vehicle when the wear limits of the brake pads and/or
those of the brake discs are exceeded.

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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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4-1. Before driving
NOTICE
●When driving over bumps in the road, drive as slowly as possible to avoid damaging the wheels, underside of the
vehicle, etc.
■If you get a flat tire while driving
A flat or damaged tire may cause the fol-
lowing situations. Hold the steering wheel firmly and gradually depress the brake pedal to slow down the vehicle.
●It may be difficult to control your vehi-
cle.
●The vehicle will make abnormal sounds or vibrations.
●The vehicle will lean abnormally.
Information on what to do in case of a flat tire ( P.384)
■When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may cause the following serious damage to the vehi-
cle:
●Engine stalling
●Short in electrical components
●Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be sure
to have any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer check the following:
●Brake function
●Changes in quantity and quality of oil
and fluid used for the engine, transmis- sion, differentials, etc.
●Lubricant condition for the propeller shaft, bearings and suspension joints
(where possible), and the function of all joints, bearings, etc.
If the shift control system is damaged by flooding, it may not be possible to shift
the shift position to P, or from P to other positions. In this case, contact any autho-rized Lexus retailer or Lexus authorized
repairer, or any reliable repairer immedi- ately.
■When parking the vehicle
Always set the parking brake, and shift the shift position to P. Failure to do so may cause the vehicle to move or the
vehicle may accelerate suddenly if the accelerator pedal is accidentally depressed.

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4-2. Driving procedures
Driving
4-2.Driving procedures
1Press the parking brake switch to
check that the parking brake is set.
( P.187)
Parking brake indicator will come on.
2Firmly depress the brake pedal.
and a message will be displayed on
the multi-information display.
If it is not displayed, the engine cannot be started.
3 Press the engine switch shortly and
firmly.
When operating the engine switch, one
short, firm press is enough. It is not neces- sary to press and hold the switch.
The engine will crank until it starts or for up to 30 seconds, whichever is less.
Continue depressing the brake pedal until the engine is completely started.
The engine can be started from any engine
switch mode.
■Engine switch illumination
According to the situation, the engine switch illumination operates as follows.
●When a door is opened, or the engine switch mode is changed from ACCES-SORY or IGNITION ON mode to off,
the engine switch illumination slowly blinks.
●When depressing the brake pedal with carrying the electric key on your person, the engine switch illumination rapidly
blinks.
●When the engine sw itch is in ACCES- SORY or IGNITION ON mode, the engine switch illumination illuminates.
■If the engine does not start
●The engine immobilizer system may not have been deactivated. ( P.70)
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●If a message related to start-up is shown on the multi-information display, read the
message and follow the instructions.
■If the 12-volt battery is discharged
The engine cannot be started using the
smart entry & start system. Refer to P.393 to restart the engine.
Engine (ignition) switch
(LC500)
Performing the following opera-
tions when carrying the electronic
key on your person starts the
engine or changes engine switch
modes.
Starting the engine

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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
Driving
1Stop the vehicle completely.
2 If the parking brake is in manual
mode, set the parking brake.
( P.187)
3 Shift the shift position to P.
( P.175)
Check that the shift position indicator
shows P. ( P.175)
4Press the engine switch.
The engine will stop, and the meter display will be extinguished (the shift position indi-
cator will be extinguished a few seconds after the meter display).
5 Check that “ACCESSORY” or
“IGNITION ON” is not shown on
the meter.
■Automatic P position selection function
 P.176
Modes can be changed by pressing
the engine switch with the brake pedal
released. (The mode changes each
time the switch is pressed.)
NOTICE
■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 any autho- rized Lexus retailer or Lexus authorized repairer, or any reliable repairer immedi-
ately.
Stopping the engine
WARNING
■Stopping the engine in an emergency
●If you want to stop the engine in an
emergency while driving the vehicle, press and hold the engine switch for more than 2 seconds, or press it briefly
3 times or more in succession. ( P.360) However, do not touch the engine
switch while driving except in an emer- gency. 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.
●If the engine switch is operated while the vehicle is running, a warning mes-
sage is shown on the multi-information display and a buzzer sounds.
●When restarting the engine after an emergency shutdown, press the engine switch.
Changing engine switch modes