engine lexus LC500 2018 Service Manual

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3-1. Key information
3-1.Key information
The following keys are provided with
the vehicle.
Electronic keys
• Operating the smart entry & start sys-
tem ( P.122)
• Operating the wireless remote control
function
Mechanical keys
Key number plate
■When riding in an aircraft
When bringing an electronic key onto an aircraft, make sure you do not press any buttons on the electronic key while inside
the aircraft cabin. If you are carrying an electronic key in your bag etc., ensure that the buttons are not likely to be pressed acci-
dentally. Pressing a button may cause the electronic key to emit radio waves that could interfere with the operation of the air-
craft.
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
●If the battery becomes low, an alarm will sound in the cabin when the engine
<hybrid system> is stopped.
●As the electronic key always receives
radio waves, the battery will become depleted even if the electronic key is not
used. The following symptoms indicate that the electronic key battery may be depleted. Replace the battery when nec-
essary. ( P.349) • The smart entry & start system or the wireless remote control does not oper-
ate. • The detection area becomes smaller.• The LED indicator on the key surface
does not turn on.
●To avoid serious deterioration, do not
leave the electronic key within 1 m (3 ft.) of the following electrical appliances that produce a magnetic field:
•TVs •Personal computers• Cellular phones, cordless phones and
battery chargers • Recharging cellular phones or cordless phones
• Table lamps •Induction cookers
■Replacing the battery
 P.349
■Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask any
authorized Lexus retailer or Lexus autho- rized repairer, or any reliable repairer for details.
■If “A New Key has been Registered
Contact Your Dealer for Details” is shown on the multi-information display
This message will be displayed each time the driver’s door is opened when the doors are unlocked from the outside for approxi-
mately 10 days after a new electronic key has been registered. If this message is displayed but you have not
had a new electronic key registered, ask any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer
to check if an unknown electronic key (other than those in your possession) has been registered.
Keys
Key types
A
B
C

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3-2. Opening, closing and locking the doors and trunk
■Switching the door unlock function
It is possible to set which doors the entry
function unlocks using the wireless remote control.
1 Turn the engine switch <power switch> off.
2 For vehicles with an intrusion sensor:
Cancel the intrusion sensor and tilt sen- sor of the alarm system to prevent unin-tended triggering of the alarm while
changing the settings. ( P.78)
3 When the indicator light on the key sur-
face is not on, press and hold or
for approximately 5 seconds
while pressing and holding .
The setting changes each time an operation is performed, as shown below. (When changing the setting continuously, release
the buttons, wait for at least 5 seconds, and repeat step 3.)
*1: Left-hand drive vehicles
*2: Right-hand drive vehicles
For vehicles with an alarm: To prevent unin- tended triggering of the alarm, unlock the doors using the wireless remote control and
open and close a door once after the set- tings have been changed. (If a door is not
opened within 30 seconds after is
pressed, the doors will be locked again and the alarm will automatically be set.)In a case that the alarm is triggered, imme-
diately stop the alarm. ( P.77)
■Impact detection door lock release sys- tem
In the event that the vehicle is subject to a strong impact, both side doors are unlocked. Depending on the force of the
impact or the type of accident, however, the system may not operate.
■Operation signals
The emergency flashers flash to indicate that the doors have been locked/unlocked. (Locked: once; Unlocked: twice)
A buzzer sounds to indicate that the win- dows are operating.
■Security feature
If a door is not opened within approximately 30 seconds after the vehicle is unlocked,
the security feature automatically locks the vehicle again.
■Open door warning buzzer
If an attempt to lock the doors is made when a door is not fully closed, a buzzer sounds continuously for 5 seconds. Fully close the
door to stop the buzzer, and lock the vehi- cle once more.
■Setting the alarm (if equipped)
Locking the doors will set the alarm system. ( P.77)
■Conditions affecting the operation of the smart entry & start system or wire-
less remote control
 P.124
■If the smart entry & start system or the
wireless remote control does not oper- ate properly
Use the mechanical key to lock and unlock
Multi-informa-
tion dis-
play/Beep
Unlocking function
*1
*2
Exterior: Beeps 3 times
Interior: Pings once
Pushing the depression
on the front edge of the
driver’s door handle
unlocks only the driver’s
door.
Pushing the depression
on the front edge of the
passenger’s door handle
unlocks both side doors.
Exterior: Beeps twice
Interior: Pings once
Pushing the depression
on the front edge of
either door handle
unlocks both side doors.

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3-2. Opening, closing and locking the doors and trunk
■Door lock indicator
The door lock indicator turns on when the
door is locked. If the door lock indicator illu- minates for more than 30 seconds while the engine switch <power switch> is off, the
door lock indicator will automatically turn off.
■If a symbol indicating one or both side doors open is shown on the multi-infor-mation display
The hood, one or both side doors, or trunk is not fully closed. If the vehicle reaches a
speed of 5 km/h (3 mph), the master warn- ing light flashes and a buzzer sounds to indi-cate that the door(s) are not fully closed.
Make sure to close hood, both side doors and trunk.
■Customization
The time elapsed before the door lock indi- cator turns off can be changed. (Customizable features: P.423)
The following functions can be set or
canceled:
For instructions on customizing, refer to
P.423.
Automatic door locking and
unlocking systems
FunctionOperation
Speed linked
door locking
function
Both side doors are
automatically locked
when the vehicle speed
is approximately 20
km/h (12 mph) or
higher.
Shift position
linked door lock-
ing function
Both side doors are
automatically locked
when the shift position
is shifted to a position
other than P.
Shift position
linked door
unlocking func-
tion
Both side doors are
automatically unlocked
when the shift position
is shifted to P.
Driver’s door
linked door
unlocking func-
tion
Both side doors are
automatically unlocked
when driver’s door is
opened within approxi-
mately 45 seconds
after turning the engine
switch <power switch>
off.

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3-2. Opening, closing and locking the doors and trunk
Before driving
■Wireless remote control
Press and hold the switch.
■Trunk light
●The trunk light turns on when the trunk is opened.
●If the trunk light is le ft on when the engine switch <power switch> is turned off, the
light will go off automatically after 20 minutes.
■Function to prevent the trunk being locked with the electronic key inside
●When both side doors are locked, closing the trunk lid with the electronic key left
inside the trunk will sound an alarm. In this case, the trunk lid can be opened by pressing the trunk release button on
the trunk lid.
●If the spare electronic key is put in the
trunk with both side doors locked, the key confinement prevention function is acti-vated so the trunk can be opened. In
order to prevent theft, take all electronic keys with you when leaving the vehicle.
●If the electronic key is put in the trunk with both side doors locked, the key may not
be detected depending on the location of the key and the surrounding radio wave conditions. In this case, the key confine-
ment prevention function cannot be acti- vated, causing the trunk to be locked when the trunk lid is closed. Make sure to
check where the key is before closing the trunk.
●The key confinement prevention function cannot be activated if either door is unlocked. In this case, open the trunk
using the trunk opener switch.
●If the trunk lid is closed by a hand having
the electronic key when the both side doors are locked, a warning buzzer may sound. In this case, the trunk is not locked.
Do not close the trunk lid by a hand hav- ing the electronic key.
■If the smart entry & start system or the wireless remote control does not oper-
ate properly
Use the trunk opener switch to unlock the
trunk. ( P.389) Replace the key battery with a new one if it is depleted. ( P.349)
■If a symbol indicating the trunk opens is
shown on the multi-information display
 P.118
■If the 12-volt battery is discharged
The trunk cannot be locked and unlocked
using the smart entry & start system or wireless remote control. Lock or unlock the trunk using the mechanical key. ( P.392)
■Customization
The trunk unlocking operation can be changed. (Customizable features:
 P.423)
Using the trunk grip, lower the trunk
without applying force to the side and
push the trunk down from the outside
to close it.
Closing the trunk

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3-2. Opening, closing and locking the doors and trunk
The trunk opener switch can be tem-
porarily disabled to protect luggage
stored in the trunk against theft.
Turn the trunk opener main switch in
the glove box off to disable the trunk
opener.
On
Off
When the trunk opener main switch is off,
the trunk lid cannot be opened even with
the wireless remote control or entry func-
tion.
■When leaving a key to the vehicle with a parking attendant
 P.114
■Antenna location
Antennas outside the cabin
Antennas inside the cabin
Antenna inside the trunk
Antenna outside the trunk
Protecting luggage against theft
A
B
Smart entry & start system
The following operations can be
performed simply by carrying the
electronic key on your person, for
example in your po cket. The driver
should always carry the electronic
key.
 Locks and unlocks the doors
( P.115)
 Opens the trunk (P.120)
 Starts the engine <hybrid system>
( P.163, 167)
A
B
C
D

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3-2. Opening, closing and locking the doors and trunk
Before driving
■Effective range (areas within which the electronic key is detected)
When locking or unlocking the doors
The system can be operated when the
electronic key is within about 0.7 m (2.3
ft.) of an outside door handle. (Only the
doors detecting the key can be oper-
ated.)
When opening the trunk
The system can be operated when the
electronic key is within about 0.7 m (2.3
ft.) of the trunk release button.
When starting the engine <hybrid sys-
tem> or changing engine switch <power
switch> modes
The system can be operated when the
electronic key is inside the vehicle.
■If an alarm sounds or a warning message is displayed
An alarm sounds and warning messages are displayed on the multi-information dis-play to protect against unexpected acci-
dents or theft of the vehicle resulting from erroneous operation. When a warning mes-sage is displayed, take appropriate mea-
sures based on the displayed message. ( P.378)
When only an alarm sounds, circumstances and correction procedures are as follows.
●When an exterior alarm sounds once for 5 seconds
●When an interior alarm sounds continu-ously
■If “Key Detected in Vehicle” is shown on the multi-information display
An attempt was made to lock the doors using the smart entry & start system while the electronic key was still inside the vehi-
cle. Retrieve the electronic key from the vehicle and lock the doors again.
A
B
C
SituationCorrection proce-
dure
The trunk was
closed while the
electronic key was
still inside the trunk
and both side doors
were locked.
Retrieve the elec-
tronic key from the
trunk and close the
trunk lid.
An attempt was
made to lock the
vehicle while a door
was open.
Close both side
doors and lock the
doors again.
SituationCorrection proce-
dure
The engine switch
<power switch> was
turned to ACCES-
SORY mode while
the driver’s door was
open (or the driver’s
door was opened
while the engine
switch <power
switch> was in
ACCESSORY
mode).
Turn the engine
switch <power
switch> off and close
the driver’s door.
The engine switch
<power switch> was
turned off while the
driver’s door was
open.
Close the driver’s
door.

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3-2. Opening, closing and locking the doors and trunk
■Battery-saving function
The battery-saving function will be acti-
vated in order to prevent the electronic key battery and the 12-volt battery from being discharged while the vehicle is not in opera-
tion for a long time.
●In the following situations, the smart entry
& start system may take some time to unlock the doors.• The electronic key has been left within
approximately 2 m (6 ft.) of the outside of the vehicle for 10 minutes or longer.• The smart entry & start system has not
been used for 5 days or longer.
●If the smart entry & start system has not
been used for 14 days or longer, the doors cannot be unlocked at the passen-ger door. In this case, push the depres-
sion on the front edge of the driver’s door handle, or use the wireless remote con-trol or mechanical key, to unlock the
doors.
■Turning an electronic key to battery- saving mode
When battery-saving mode is set, battery depletion is minimized by stopping the elec-
tronic key from receiving radio waves.
Press twice while pressing and
holding . Confirm that the elec-
tronic key indicator flashes 4 times.
While the battery-saving mode is set, the smart entry & start system cannot be used. To cancel the function, press any of the elec-
tronic key buttons.
■Conditions affecting operation
The smart entry & star t system uses weak radio waves. In the following situations, the
communication between the electronic key and the vehicle may be affected, preventing
the smart entry & start system, wireless remote control and engine immobilizer sys-tem <immobilizer syst em> from operating
properly. (Ways of coping: P.389)
●When the electronic key battery is
depleted
●Near a TV tower, electric power plant,
gas station, radio station, large display, airport or other facility that generates strong radio waves or electrical noise
●When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
●When the electronic key is in contact
with, or is covered by the following metal- lic objects• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside• Metallic wallets or bags
•Coins • Hand warmers made of metal• Media such as CDs and DVDs
●When other wireless keys (that emit radio waves) are being used nearby
●When carrying the electronic key
together with the following devices that emit radio waves• Another vehicle’s electronic key or a
wireless key that emits radio waves • Personal computers or personal digital assistants (PDAs)
• Digital audio players • Portable game systems
●If window tint with a metallic content or metallic objects are attached to the rear window
●When the electronic key is placed near a battery charger or electronic devices
■Note for the entry function
●Even when the electronic key is within the effective range (detection areas), the sys-
tem may not operate properly in the fol- lowing cases:• The electronic key is too close to the win-
dow or outside door handle, near the ground, or in a high place when the doors are locked or unlocked.

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3-2. Opening, closing and locking the doors and trunk
Before driving
• The electronic key is near the ground or in a high place, or too close to the center of the rear bumper when the trunk is
opened. • The electronic key is on the instrument panel, rear package tray or floor, or in the
door pockets or glove box when the engine <hybrid system> is started or engine switch <power switch> modes are
changed.
●Do not leave the electronic key on top of
the instrument panel or near the door pockets when exiting the vehicle. Depending on the radio wave reception
conditions, it may be detected by the antenna outside the cabin and the doors will become lockable from the outside,
possibly trapping the electronic key inside the vehicle.
●As long as the electronic key is within the effective range, the doors may be locked or unlocked by anyone. However, only
the doors detecting the electronic key can be used to unlock the vehicle.
●Even if the electronic key is not inside the vehicle, it may be possible to start the engine <hybrid system> if the electronic
key is near the window.
●The doors may unlock or lock if a large amount of water splashes on the door handle, such as in the rain or in a car
wash, when the electronic key is within the effective range. (The doors will auto- matically be locked after approximately
30 seconds if the doors are not opened and closed.)
●If the wireless remote control is used to lock the doors when the electronic key is near the vehicle, there is a possibility that
the door may not be unlocked by the entry function. (Use the wireless remote control to unlock the doors.)
●If the door handle becomes wet while the electronic key is within the effective
range, the door may lock and unlock repeatedly. In this case, follow the follow-ing correction procedures to wash the
vehicle: • Place the electronic key in a location 2 m (6 ft.) or more away from the vehicle.
(Take care to ensure that the key is not stolen.)• Set the electronic key to battery-saving
mode to disable the smart entry & start system. ( P.124)
●If the electronic key is inside the vehicle and a door handle becomes wet during a car wash, a message may be shown on
the multi-information display and a buzzer will sound outside the vehicle. To turn off the alarm, lock both side doors.
●If an outside door handle is not retracted during a car wash, a door may be opened
or an outside door handle may be dam- aged. Make sure that the outside door handles are retracted before using the
car wash.
●A sudden handle operation or a handle
operation immediately after entering the effective range may prevent the doors from being unlocked. Touch the door
unlock sensor and check that the doors are unlocked before pulling the door handle again.
●Unlocking the vehicle may take more time if another electronic key is within the
effective range.
■When the vehicle is not driven for extended periods
●To prevent theft of the vehicle, do not leave the electronic key within 2 m (6 ft.)
of the vehicle.
●The smart entry & start system can be
deactivated in advance.
■To operate the system properly
●Make sure to carry the electronic key
when operating the system. Do not get the electronic key too close to the vehicle when operating the system from the out-
side of the vehicle. Depending on the position and holding condition of the electronic key, the key
may not be detected correctly and the system may not operate properly. (The alarm may go off accidentally, or the door
lock prevention function may not oper- ate.)
●Do not leave the electronic key inside the

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3-2. Opening, closing and locking the doors and trunk
trunk. The key confinement prevention function may not operate, depending on the loca-
tion of the key (the inside edge of the Trunk), conditions (inside a metal bag, close to metallic objects) and the radio
waves in the surrounding area. ( P.123)
■If an electronic key does not work prop- erly
●Locking and unlocking the doors and opening the trunk: P.389
●Starting the engine <hybrid system>:  P.390
■Customization
Settings (e. g. smart entry & start system) can be changed. (Customizable features: P.423)
If the smart entry & start system has been deactivated in a customized setting, refer to
the explanations for the following opera- tions.
●Locking and unlocking the doors and opening the trunk: Use the wireless remote control or
mechanical key. ( P.115, 121, 389)
●Starting the engine <hybrid system> and changing engine switch <power switch> modes: P.390
●Stopping the engine <hybrid system>:  P.165, 169

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3-3. Adjusting the seats
Before driving
■Before entering/exiting the rear
seats
 Remove the seat belt from the seat
belt guide. ( P.32)
 Stow the sun visor.
■Entering/exiting the rear seat
1 Pull the lever.
The front seat will lower automatically.
2Fold the seatback completely for-
ward.
The front seat will move forward and the
head restraint will move downward* auto- matically.
*: Power type only
■Returning the front seat to its origi-
nal position
Move the seatback backward until it
locks. The front seat will return to its
original position automatically.
■Lever-operated “Front, Fold & Return” seat
●After the front seat is moved forward by operating the “Front, Fold & Return” seat
lever, if a power seat adjusting switch or a driving position memory switch is pressed, the front seat will not return to its
original position even if the front seatback is moved backward until it locks.
●The lever-operated “Front, Fold & Return” seat will not operate in the follow-
ing situations: • The seat belt of the seat to be operated is fastened.
• The engine switch <power switch> is in IGNITION ON mode <ON mode> and the shift position is in a position other than
P.
●Operation of the lever-operated “Front,
Fold & Return” seat will stop in the follow- ing situations:• A power seat adjusting switch or a driv-
ing position memory switch is pressed. • The seat belt of the seat which is operat-ing is fastened.
• The engine switch <power switch> is in IGNITION ON mode <ON mode> and the shift position is changed to a position
other than P.
■Jam protection function
While the driving positi on is recalling or the
lever-operated “Front, Fold & Return” seat is operating, if an object is stuck either in front of or behind the front seat, the front
seat will stop and then move in the opposite direction slightly.
When the jam protection function operates, the seat stops at a po sition other than the set seat position. Check the seat position.
Entering/exiting the rear seats
(lever-operated “Front, Fold &
Return” seat)