2018 Lexus LC500 change key battery

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1-4. Theft deterrent system
For safety and security
■Setting
Close the doors, trunk and hood, and
lock both side doors using the entry
function or wireless remote control.
The system will be set automatically
after 30 seconds.
The indicator light changes from being on
to flashing when the system is set.
■Canceling or stopping
Do one of the following to deactivate
or stop the alarm:
 Unlock the doors or open the trunk
using the entry function or wireless
remote control.
 Start the engine .
(The alarm will be deactivated or
stopped after a few seconds.)
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Triggering of the alarm
The alarm may be triggered in the following situations:(Stopping the alarm deactivates the alarm
system.)
●The doors are unlocked using the
mechanical key.
●A person inside the vehicle opens a door, the trunk or hood, or unlocks the vehicle using a door lock switch.
●The 12-volt battery is recharged or replaced when the vehicle is locked.
( P.398)
■Alarm-operated door lock
In the following cases, depending on the sit-
uation, the door may automatically lock to prevent improper entry into the vehicle:
●When a person remain ing in the vehicle unlocks the door and the alarm is acti-vated.
●While the alarm is activated, a person remaining in the vehicle unlocks the door.
●When recharging or replacing the 12-volt battery

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3-2. Opening, closing and locking the doors and trunk
Before driving
the doors. (P.389) Replace the key battery with a new one if it is depleted. ( P.349)
■If the 12-volt battery is discharged
The doors cannot be locked and unlocked using the smart entry & start system or
wireless remote control. Lock or unlock the doors using the mechanical key. ( P.389)
■Customization
Settings (e.g. unlocking function using a key) can be changed. (Customizable features: P.423)
■Door lock switches
1 Locks both side doors
The indicator comes on.
2Unlocks both side doors
The indicator turns off.
■Inside door handles
Pull the inside door handle to unlock
the door.
The door lock indicator turns off.
The doors can be opened by pulling the
inside door handle even if the door lock
indicator illuminates.
WARNING
■To prevent an accident
Observe the following precautions while driving the vehicle.Failure to do so may result in a door
opening and an occupant being thrown out of the vehicle, re sulting in death or serious injury.
●Ensure that both side doors are prop-
erly closed.
●Do not pull the inside door handle while driving. The doors may opened even if they are locked.
■Side window open/close function
linked to door operation
Do not hold the upper edge of the side
window when you close the door. Other- wise, your fingers or hand may be caught in the window.
■When using the wireless remote con-
trol and operating the power windows
Operate the power window after check-
ing to make sure that there is no possibil- ity of any passenger having any of their body parts caught in the window. Also,
do not allow children to operate the wire- less remote control. It is possible for chil-dren and other passengers to get caught
in the power window.
■When entering and exiting the vehi- cle
Do not step on the scuff plate. Slipping on the surface may result in injury.
Unlocking and locking the doors
from the inside
A
A
A
A

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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 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
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 is started or engine 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 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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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
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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7-2. Steps to take in an emergency
When trouble arises
ACCESSORY mode.
3Firmly depress the brake pedal and
check that is shown on the
multi-information display.
4 Press the engine switch switch>.
In the event that the engine tem> still cannot be started, contact
any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.
■Stopping the engine
Set the parking brake, shift the shift position to P and press the engine switch as you normally do when stopping
the engine .
■Electronic key battery
As the above procedure is a temporary
measure, it is recommended that the elec- tronic key battery be replaced immediately when the battery is depleted. ( P.349)
■Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set, the alarm may be triggered.
■Changing engine switch
modes
Release the brake pedal and press the
engine switch in step 3
above. The engine does not start and modes will be changed each time the
switch is pressed. ( P.165, 170)