2018 LEXUS RCF ECU

1553-2. Opening, closing and locking the doors and trunk
3
Operation of each component
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)WARNING ■
Using the trunk
Observe the following precautions.
Failure to do so may cause parts of the body to be caught, resulting in serious injury.●
Remove any heavy loads, such as snow and ice, from the trunk lid before opening it.
Failure to do so may cause the trunk lid to suddenly shut again after it is opened.●
When opening or closing the trunk lid, thoroughly check to make sure the surround-
ing area is safe. ●
If anyone is in the vicinity, make sure they are safe and let them know that the trunk is
about to open or close. ●
Use caution when opening or closing the tr unk lid in windy weather as it may move
abruptly in strong wind. ●
On an incline it is more difficult to open or close the trunk lid th an on a level surface,
so beware of the trunk lid un expectedly opening or closin g by itself. Make sure that
the trunk lid is fully open and secure before using the trunk.
●
Do not attach any accessories other than genuine Lexus parts to the trunk lid. Such
additional weight on the trunk lid may cause the lid to suddenly shut again after it is
opened. ●
When opening the trunk lid, take care so that
it does not hit anyone in the face or any other
part of the body.
●
When closing the trunk li d, take extra care to
prevent your fingers etc. from being caught. ●
When closing the trunk lid, make sure to
press it lightly on its outer surface. If the trunk
handle is used to fully close the trunk lid, it
may result in hands or arms being caught.

1593-2. Opening, closing and locking the doors and trunk
3
Operation of each component
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)■
Note for the entry function ●
Even when the electronic key is within the effective range (detection areas), the system
may not operate properly in the following cases:
• The electronic key is too close to the window or outside door handle, near the
ground, or in a high place when the doors are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the rear
bumper center when the trunk is opened.
• The electronic key is on th e instrument panel, rear pack age 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 th e 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 an d the doors will become lockable from the
outside, possibly trapping the electronic key inside the vehicle. ●
As long as the electronic key is within th e effective range, the doors may be locked or
unlocked by anyone. However, only the door s 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 amou nt of water splashes on the door handle,
such as in the rain or in a car wash, when th e electronic key is with in the effective range.
(The doors will automatically be locked af ter approximately 60 seconds if the doors
are not opened and closed.) ●
If the wireless remote control is used to lo ck the doors when the electronic key is near
the vehicle, there is a possibility that the d oor may not be unlocked by the entry func-
tion. (Use the wireless remote control to unlock the doors.) ●
Touching the door lock or unlock sensor while wearing gloves may prevent lock or
unlock operation. ●
When the lock operation is performed using the lock sensor, recognition signals will be
shown up to two consecutive times. After this, no recognition signals will be given.●
If the door handle becomes wet while the el ectronic key is within the effective range,
the door may lock and unlock repeatedly. In this case, follow th e following correction
procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) 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 access system
with push-button start. (  P. 158)●
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 mult i-information display and a buzzer will
sound outside the vehicle. To turn of f the alarm, lock both side doors.●
The lock sensor may not work properly if it comes into contact with ice, snow, mud, etc.
Clean the lock sensor and attempt to operate it again. ●
A sudden handle operation or a handle operation immediately after entering the effec-
tive range may prevent the doors from bein g 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 effec-
tive range.

1633-3. Adjusting the seats
3
Operation of each component
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)WARNING ■
When adjusting the seat position ●
Take care when adjusting the seat position to ensure that other passengers are not
injured by the moving seat. ●
Do not put your hands under the seat or near the moving parts to avoid injury.
Fingers or hands may become jammed in the se at mechanism.●
Make sure to leave enough space around the feet so they do not get stuck. ■
Seat adjustment
To reduce the risk of sliding under the lap be lt during a collision, do not recline the seat
more than necessary.
If the seat is too reclined, the lap belt may slide past the hips and apply restraint forces
directly to the abdomen, or your neck may contact the shou lder belt, increasing the risk
of death or serious injury in the event of an accident.
Adjustments should not be made while drivin g as the seat may unexpectedly move and
cause the driver to lose control of the vehicle. ■
Lever-operated “Front, Fold & Return” seat ●
Before operating the lever-operated “Front, Fold & Return” seat, ensure that any sur-
rounding passengers or objects will not contact the seat.●
Make sure the seatback is lo cked securely before driving.●
Never operate the lever-operated “Front, Fold & Return” seat while the vehicle is
moving. ■
Jam protection function
Do not use a hand, foot, or an y other part of your body to intentionally activate the jam
protection function.

164 3-3. Adjusting the seats
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)Move the luggage security system
lever to the unlock position.
Pull the seatback lock release lever
and fold the seatback down. To return a rear seatback to its original
position, lift it until it locks. If a rear head
restraint contacts the ceiling and the
seatback cannot be returned smoothly,
lower the head rest raint to the lowest
position.
 P. 152Rear seats (folding type) 
 : If equippedThe rear seatbacks can be folded down.
Folding down the rear seatbacks 1
2
Luggage security system

1653-3. Adjusting the seats
3
Operation of each component
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)WARNING
Observe the following precautions. Failure to do so may result in death or serious injury.■
When folding the re ar seatbacks down●
Do not fold the seatbacks down while driving. ●
Stop the vehicle on level ground, set the pa rking brake and shift the shift lever to P.●
Do not allow anyone to sit on a folded seatback or in the trunk while driving.●
Do not allow children to enter the trunk. ■
After returning the rear seat back to the upright position
●
Check that the seat belts are not twisted or caught in the seatback. ●
Make sure that the seatback is securely
locked in position by lightly pushing it back
and forth.
If the seatback is not securely locked, the red
marking will be visible on the seatback lock
release knob. Make sure that the red marking
is not visible.

174
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)3-4. Adjusting the steering wheel and mirrors 
Manual type
Hold the steering wheel and push
the lever down.
Adjust to the ideal position by mov-
ing the steering wheel horizontally
and vertically. After adjustment, pull the lever up to
secure the steering wheel. 
Power type
Operating the switch moves the steering wheel in the following directions:
Up
Down
Toward the driver
Away from the driverSteering wheel Adjustment procedure 1
2
1
2
3
4

1753-4. Adjusting the steering wheel and mirrors
3
Operation of each component
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)To sound the horn, press on or close to
the mark. ■
The steering wheel can be adjusted when (power type)
The engine switch is in ACCESSORY or IGNITION ON mode
* .
* : If the driver’s seat belt is fastened, the steering wheel can be adjusted regardless of
engine switch mode. ■
Automatic adjustment of the steering position (if equipped)
A desired steering position ca n be entered to memory and recalled automatically by the
driving position memory system. (  P. 166)■
Power easy access system (power type)
The steering wheel and driver’s seat move in accordance with engine switch mode and
the driver’s seat belt condition. (  P. 166)Horn
WARNING ■
Caution while driving
Do not adjust the steeri ng wheel while driving.
Doing so may cause the driver to mishandle the vehicle and cause an accident, result-
ing in death or serious injury. ■
After adjusting the steering wheel (manual type)
Make sure that the steering wheel is securely locked.
Otherwise, the steering wheel may move su ddenly, possibly causing an accident, and
resulting in death or serious injury. Also, th e horn may not sound if the steering wheel is
not securely locked.

1974-1. Before driving
4
Driving
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury. ■
If a brake pad wear warning message is displayed (RC F)
Have the brake pads visually checked and replaced by your Lexus dealer as soon as
possible.
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, Lexu s recommends that you also have the thickness of the
discs measured.
It is dangerous to drive the vehicle when the wear limits of the brake pads and/or those
of the brake discs are exceeded. ■
When the vehicle is stopped ●
Do not race the engine.
If the vehicle is in any gear other than P or N, the vehicle may accelerate suddenly
and unexpectedly, causing an accident. ●
In order to prevent accidents due to the ve hicle rolling away, always keep depressing
the brake pedal while the engine is running, and apply the parking brake as neces-
sary. ●
If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, alwa ys depress the brake pedal and securely
apply the parking brake as needed. ●
Avoid revving or r acing 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.