2019 LEXUS RCF start stop button

132 2. Instrument cluster
RC F_U ■
Odometer
Displays the total distance the vehicle has been driven. ■
Trip meter A/trip meter B
Displays the distance the vehicle has been driven since the meter was last
reset. Trip meters A and B can be used to record and display different dis-
tances independently. To reset, display the desired trip meter and press and hold the odometer/trip meter
and trip meter reset button.■
Eco Driving Indicator
Eco Driving Indicator will not operate under the following conditions: ●
The shift lever is in any position other than D. ●
A paddle shift swit ch is operated.●
Neither normal mode nor Eco drive mode is selected. (  P. 301)●
The vehicle speed is approximatel y 80 mph (130 km/h) or higher.■
Start-up display
When the engine is started, the name of the vehicle is displayed on the multi-information
display.
While the start-up display is being displaye d, the meter display cannot be changed even
if the drive mode is changed. When the start- up display is finished, the meter display for
the currently selected mode will be displayed.■
Torque distribution display (if equipped)
Torque distribution may not be displayed correctly in some ca ses, such as when the vehi-
cle passes over road expansion joints.Odometer/trip meter display
During Eco-friendly acceleration (Eco driving),
the Eco Driving Indicator Light will turn on.
When the acceleration exceeds the Zone of
Eco driving, or when the vehicle is stopped, the
light turns off.

1433-1. Key information
3
Operation of each component
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Electronic key battery depletion ●
The standard battery life is 1 to 2 years. (The card key battery life is about a year and a
half.) ●
If the battery becomes low, an alarm will soun d in the cabin when the engine is stopped.
(  P. 485) ●
As the electronic key always receives ra dio waves, the battery will become depleted
even if the electronic key is not used. The following symptoms indi cate that the elec-
tronic key battery may be depleted. Replace the battery when necessary. (  P. 427)
• The smart access system with push-button start or the wireless remote control does
not operate.
• 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 3 ft. (1 m) 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. 427 ■
Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask your Lexus
dealer for details. ■
If a wrong key is used
The key cylinder rotates freely, isol ated from the internal mechanism.

146 3-2. Opening, closing and locking the doors and trunk
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Operation signals
A buzzer sounds and the emergency flashers flash to indicate that the doors have been
locked/unlocked. (Locked: once; Unlocked: twice)
A buzzer sounds to indicate that th e windows and moon roof are operating.■
Security feature
If a door is not opened within approximately 60 seconds after the vehicle is unlocked, the
security feature automatically locks the vehicle again. ■
Welcome light illumination control
The side marker, parking, tail and license plate lights automati cally turn on at night when
the doors are unlocked using the entry function or wireless remote control if the light
switch is in the “AUTO” position. ■
When the door cannot be locked by the lock sensor on the surface of the door handle
■
Door lock 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 d oor to stop the buzzer, and lock the vehicle
once more. ■
Setting the alarm
Locking the doors will set the alarm system. (  P. 80)■
If the smart access system with push-button start or the wireless remote control does
not operate properly
Use the mechanical key and/or inside lock buttons to lock and unlock the doors.
(  P. 518)
Replace the key battery with a new one if it is depleted. (  P. 427)Use your palm to touch the lock sensor.

1493-2. Opening, closing and locking the doors and trunk
3
Operation of each component
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Side window open/close function linked to door operation
When a door is opened, its window opens s lightly. When a door is closed, its window
closes completely. ■
Switching the door unlock function
It is possible to set which doors the entry function unlock s using the wireless remote con-
trol.
Turn the engine switch off.
When the indicator light on the key surface 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 .)
To prevent unintended triggering of the alarm, unlock the doors using the wireless
remote control and open and close a door once after the settings have been changed. (If
a door is not opened within 60 seconds af ter is pressed, the doors will be locked
again and the alarm will automatically be set.)
In a case that the alarm is triggered, immediately stop the alarm. (  P. 80)■
Impact detection door lock release system
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. ■
Using the mechanical key
The doors can also be unlocked with the mechanical key. (  P. 518)■
Conditions affecting the oper ation of the smart access sy stem with push-button start
or wireless remote control
 P. 158 ■
Customization
Settings (e.g. unlocking function using a key) can be changed.
(Customizable features:  P. 569) 1
2
2
Multi-information
display Unlocking function Beep
Holding the driver’s door handle
unlocks only the driver’s door.
Exterior: Beeps 3 times
Interior: Pings once
Holding the passenger’s door
handle unlocks both side doors.
Holding either door handle
unlocks both side doors. Exterior: Beeps twice
Interior: Pings once

158 3-2. Opening, closing and locking the doors and trunk
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Electronic Key Battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping the elec-
tronic key from re ceiving radio waves.
■
Conditions affe cting operation
The smart access system with push-button st art uses weak radio wa ves. In the following
situations, the communication between the electronic key and the vehicle may be
affected, preventing the smar t access system with push-but ton start, wireless remote
control and engine immobilizer sy stem from operating properly.
(Ways of coping:  P. 518)●
When the electronic key battery is depleted ●
Near a TV tower, electric power plant, gas st ation, radio station, la rge display, airport or
other facility that generates strong radio wave s or electrical noise●
When carrying a portable radio, cellular phone, cordless phone or other wireless com-
munication device ●
When the electronic key is in contact wi th, or is covered by the following metallic
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 person al digital assistants (PDAs)
• Digital audio players
• Portable game systems ●
If window tint with a metallic content or me tallic objects are atta ched to the rear win-
dow ●
When the electronic key is placed near a battery charger or electronic devicesPress twice while pressing and holding
. Confirm that the electronic key indica-
tor flashes 4 times.
While the battery-saving mode is set, the smart
access system with push -button start cannot be
used. To cancel the function, press any of the
electronic key buttons.

160 3-2. Opening, closing and locking the doors and trunk
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When the vehicle is not driven for extended periods ●
To prevent theft of the vehicle, do not leave the electronic key within 6 ft. (2 m) of the
vehicle. ●
The smart access system wi th push-button start can be deactivated in advance.
(  P. 569)■
To operate the system properly ●
Make sure to carry the electr onic key when operating the system. Do not get the elec-
tronic key too close to the vehicle when operating the system from the outside of the
vehicle.
Depending on the position and holding condit ion of the electronic key, the key may not
be detected correctly and the system may no t operate properly. (The alarm may go off
accidentally, or the door lock prev ention function may not operate.)●
Do not leave the electronic key inside the trunk.
The key confinement prevention function ma y not operate, depending on the location
of the key (close to a spare tire [if equipped], the inside edge of the trunk), conditions
(inside a metal bag, close to metallic obje cts) and the radio waves in the surrounding
area. (  P. 153)■
If the smart access system with push-button start does not operate properly ●
Locking and unlocking the d oors and opening the trunk:  P. 518●
Starting the engine:  P. 520■
Customization
Settings (e. g. smart access system with push-button start) can be changed.
(Customizable features:  P. 569)■
If the smart access system with push-button start has been deactivated in a customized
setting ●
Locking and unlocking the d oors and opening the trunk:
Use the wireless remote cont rol or mechanical key. (  P. 145, 151, 518)●
Starting the engine and changing engine switch modes:  P. 520●
Stopping the engine:  P. 207
WARNING ■
Caution regarding interference with electronic devices●
People with implantable cardiac pacema kers, cardiac resynchronization therapy-
pacemakers or implantable cardioverter de fibrillators should keep away from the
smart access system with push-button start antennas. (  P. 156)
The radio waves may affect the operation of such devices. If necessary, the entry
function can be disabled. Ask your Lexus dealer for details, such as the frequency of
radio waves and timing of the emitted radio waves. Then, consult your doctor to see if
you should disable the entry function. ●
Users of any electrical medical device ot her than implantable cardiac pacemakers,
cardiac resynchronization th erapy-pacemakers or implantable cardioverter defibril-
lators should consult the manufacturer of the device for information about its opera-
tion under the influence of radio waves.
Radio waves could have unexpected effects on the operation of such medical
devices.
Ask your Lexus dealer for details on disabling the entry function.

2114-2. Driving procedures
4
Driving
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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 immediately 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. ■
If the smart access system wi th push-button start has been deactivated by a customized
setting
 P. 518
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 resu lting 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 complete stop. Activation of the steering lock in this cir-
cumstance may lead to an accident, re sulting in death or serious injury.■
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 succes-
sion. (  P. 443)
However, do not touch the engi ne switch while driv ing except in an emergency. Turning
the engine off while driving will not cause lo ss of steering or braking control, but the
power assist to these systems will be lost. Th is will make it more difficult to steer and
brake, so you should pull over and stop the vehicle as soon as it is safe to do so.

3415-1. Using the air conditioning system
5
Interior features
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Registering air conditioning settings to elec tronic keys (vehicles with driving position
memory) ●
Unlocking the vehicle using an electronic ke y and turning the engine switch to IGNI-
TION ON mode will recall that key's re gistered air conditioning settings. ●
When the engine switch is tu rned off, the current air cond itioning settings will automat-
ically be registered to the electronic key that was used to unlock the vehicle. ●
The system may not operate correctly if more th an one electronic key is in the vicinity or
if the smart access system with push-button start is used to unlock a passenger door. ●
The doors that can recall the air conditioning setting* when unlocked using the smart
access system with push-button start can be changed. For details, contact your Lexus
dealer.
*: The doors that can recall the driving posi tion memory are change d at the same time.■
Using automatic mode
Fan speed is adjusted automatically according to the temperature setting and the ambi-
ent conditions.
Therefore, the fan may stop for a while until wa rm or cool air is ready to flow immediately
after is pressed or “AUTO” is selected. ■
Using the voice command system
Air conditioning system can be operated using voic e commands. For details, refer to the
“NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”. ■
Fogging up of the windows
The windows will easily fog up when the hu midity in the vehicle is high. Turning
(“A/C”) on will dehumidify the air from the outlets and defog the wi ndshield effectively.●
If you turn (“A/C”) off, the windows may fog up more easily.●
The windows may fog up if the recirculated air mode is used. ■
Outside/recirculated air mode ●
When driving on dusty roads such as tunnels or in heavy traffic, set the outside/recircu-
lated air mode button to the recirculated air mode. This is effective in preventing out-
side air from enteri ng the vehicle interior. During cooling operation, setting the
recirculated air mode will also cool the vehicle interior effectively. ●
Outside/recirculated air mode may automa tically switch depending on the tempera-
ture setting or the inside temperature. ■
When the outside temperature exceeds 75  F (24  C) and the air conditioning system
is on ●
In order to reduce the air co nditioning power consumption, the air conditioning system
may switch to recirculated air mode automa tically. This may also reduce fuel consump-
tion. ●
Recirculated air mode is selected as a defaul t mode when the engine switch is turned to
IGNITION ON mode. ●
It is possible to switch to outside air mode at any time by pressing .