2021 LEXUS RCF check engine

1163-5. Opening, closing the windows and moon roof
■Customization
Some functions can be customized.
(  P.360)
WARNING
Observe the following precautions.
Failure to do so may cause death or seri-
ous injury.
■Opening the moon roof
●Do not allow any passengers to put
their hands or heads outside the vehi-
cle while it is moving.
●Do not sit on top of the moon roof.
■Opening and closing the moon roof
●The driver is responsible for moon roof
opening and closing operations. In
order to prevent accidental operation,
especially by a child, do not let a child
operate the moon roof. It is possible for
children and other passengers to have
body parts caught in the moon roof.
●Check to make sure that all passen-
gers do not have any part of their body
in a position where it could be caught
when the moon roof is being operated.
●When using the wireless remote con-
trol or mechanical key and operating
the moon roof, oper ate the moon roof
after checking to make sure that there
is no possibility of any passenger hav-
ing any of their body parts caught in
the moon roof. Also, do not let a child
operate moon roof by the wireless
remote control or mech anical key. It is
possible for children and other passen-
gers to get caught in the moon roof.
●When exiting the vehicle, turn the
engine switch off, carry the key and
exit the vehicle along with the child.
There may be accidental operation,
due to mischief, etc., that may possibly
lead to an accident.
■Jam protection function
●Never use any part of your body to
intentionally activa te the jam protec-
tion function.
●The jam protection function may not
work if something gets caught just
before the moon roof is fully closed.
Also, the jam protection function is not
designed to operate while the moon
roof switch is being pressed. Take care
so that your fingers, etc. do not get
caught.
NOTICE
■To prevent damage to the moon roof
●Before opening, make sure that there
are no foreign objects such as stones
or ice around the opening.
●Do not hit the face or edge of the
moon roof with hard objects.
■Operating the moon roof
There is the possibility that water or rain
will get into the vehicle if you operate the
moon roof after a rainfall, snowfall or car
wash. Wipe the moon roof dry with a
cloth before operating it.

1204-1. Before driving
WARNING
●During normal driving, do not turn off
the engine. Turning the engine off
while driving will not cause loss of
steering or braking control, but the
power assist to these systems will be
lost. This 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.
However, in the event of an emer-
gency, such as if it becomes impossible
to stop the vehicle in the normal way:
P.294
●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.132)
●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.
●Do not drive in excess of the speed
limit. Even if the legal speed limit per-
mits it, do not drive over 85 mph (140
km/h) unless your vehicle has
high-speed capability tires. Driving
over 85 mph (140 km/h) may result in
tire failure, loss of control and possible
injury. Be sure to consult a tire dealer
to determine whether the tires on your
vehicle are high-speed capability tires
or not before driving at such speeds.
■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.
●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.
■When shifting the shift lever
●Do not let the vehicle roll backward
while the shift lever is in a driving posi-
tion, or roll forward while the shift lever
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.
●Do not shift the shift lever 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 lever to a driving
position while the vehicle is moving
backward.
Doing so can damage the transmission
and may result in a loss of vehicle con-
trol.
●Do not shift the shift lever to R while
the vehicle is moving forward.
Doing so can damage the transmission
and may result in a loss of vehicle con-
trol.
●Moving the shift lever to N while the
vehicle is moving will disengage the
engine from the transmission. Engine
braking is not available when N is
selected.

1214-1. Before driving
4
Driving
WARNING
●Be careful not to shift the shift lever
with the accelerator pedal depressed.
Shifting the shift lever to a gear 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.
■If a brake pad wear warning message
is displayed
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 enha nced 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 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 sud-
denly and unexpectedly, causing an
accident.
●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 park-
ing 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 cigare tte 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.

1234-1. Before driving
4
Driving
NOTICE
●Do not use the accelerator pedal or
depress the accelerator and brake
pedals at the same time to hold the
vehicle on a hill.
■When parking the vehicle
●Always set the parking brake and shift
the shift lever to P. Failure to do so may
cause the vehicle to move or the vehi-
cle may accelerate suddenly if the
accelerator pedal is accidentally
depressed.
●Vehicles with titanium mufflers: Be
careful when parking in a parking spot
with anything protruding from the sur-
face, such as a multi-level parking sys-
tem, as the protruding area may
contact and damage the muffler.
■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.
●When driving over bumps in the road,
drive as slowly as possible to avoid
damaging the wheels, underside of the
vehicle, etc.
●Vehicles with titanium mufflers: As the
vehicle’s ground clearance is low,
when driving over bumps or areas
where the road height changes, drive
as slowly as possible to avoid damag-
ing the muffler.
■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.313, 319)
■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 your Lexus dealer check the fol-
lowing:
●Brake function
●Changes in quantity and quality of oil
and fluid used for the engine, transmis-
sion, differential, etc.
●Lubricant condition for the propeller
shaft, bearings and suspension joints
(where possible), and the function of
all joints, bearings, etc.
■Precaution for CCB (Carbon
Ceramic Brake) discs (if equipped)
Be careful not to subject the CCB discs
to any kind of strong impact.
Even if there is no obvious damage, in the
following situations, have the vehicle
inspected by your Lexus dealer:

1284-2. Driving procedures
4-2.Driving procedures
1Check that the parking brake is set.
2 Check that the shift lever is in P.
3 Firmly 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.
4 Press the engine switch shortly and
firmly.
When operating the engine switch, one
short, firm press is enough.
It is not necessary 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.
■If the engine does not start
●The engine immobilizer system may not have been deactivated. (
P.57)
Contact your Lexus dealer.
●Check that the shift leve r is securely set in
P. The engine may not start if the shift
lever is displaced out of P.
■Electronic key battery depletion
 P.88
■Conditions affecting operation
 P.100
■Notes for the entry function
 P.100
■Steering lock function
●After turning the engine switch off and
opening and closing the doors, the steer-
ing wheel will be lock ed due to the steer-
ing lock function. Operating the engine
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Steering Wheel Lock Press
Engine Switch while Turning Wheel” will
be displayed on the multi-information dis-
play.
Check that the shift lever is in P. Press the
engine switch 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.
■Electronic key battery
 P.283
■Operation of the engine switch
●If the switch is no t pressed shortly and
Engine (ignition) switch
Performing the following opera-
tions when carryin g the electronic
key on your person starts the
engine or changes engine switch
modes.
Starting the engine

1294-2. Driving procedures
4
Driving
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 access sy stem with push-button
start has been deactivated in a customized
setting, refer to P.332.
1 Stop the vehicle.
2 Set the parking brake ( P.137),
and shift the shift lever to P.
3 Press the engine switch.
4 Release the brake pedal and check
that the display on the meters is off.
■Automatic engine shut off feature
●The vehicle is equipped with a feature
that automatically shuts off the engine
when the shift lever is in P with the engine
running for an extended period.
●The engine will automatically shut off
after approximately 1 hour if it has been
left running while the shift lever is in P.
●The timer for the automatic engine shut
off feature will reset if the brake pedal is
depressed or if the shift lever is in a posi-
tion other than P.
●After the vehicle is parked, if the door is
locked with the door lock switch ( P.94)
from the inside or the mechanical key
(  P.332) from the outside, the auto-
matic engine shut off feature will be dis-
abled. The timer for the automatic engine
shut off feature will be re-enabled if the
driver’s door is opened.
■Locking the door from outside with the
engine running
1 With the driver’s door open, pull the
driver’s door hand le and insert the
mechanical key.
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 your Lexus dealer immedi-
ately.
■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 your Lexus
dealer immediately.
Stopping the engine

1314-2. Driving procedures
4
Driving1Off*
The emergency flashers can be used. The
analog speedometer and the tachometer
will not be illuminated. However, if the wel-
come illumination is op erating, the analog
speedometer will illuminate. (Welcome
illumination:  P.71)
2ACCESSORY mode
Some electrical components such as the
audio system can be used.
The analog speedome ter is illuminated.
3IGNITION ON mode
All electrical components can be used. The
analog speedometer and the tachometer
will be illuminated.
*: If the shift lever is in a position other than
P when turning off the engine, the
engine switch will be turned to ACCES-
SORY mode, not to off.
■Auto power off function
If the vehicle is left in ACCESSORY mode
for more than 20 minutes or IGNITION
ON mode (with the engine not running) for
more than an hour with the shift lever in P, the engine switch will automatically turn off.
However, this function cannot entirely pre-
vent battery discharge. Do not leave the
vehicle with the engine switch in ACCES-
SORY or IGNITION ON mode for long
periods of time when the engine is not run-
ning.
If the engine is stopped with the shift
lever in a position other than P, the
engine switch will not be turned off but
instead be turned
to ACCESSORY
mode. Perform the following proce-
dure to turn the switch off:
1 Check that the parking brake is set.
2 Shift the shift lever to P.
3 Check that “Turn Off Vehicle” is
displayed on the multi-information
display and then press the engine
switch once.
4 Check that “Turn Off Vehicle” on
the multi-information display is off.
NOTICE
■To prevent battery discharge
●Do not leave the engine switch in
ACCESSORY or IGNITION ON
mode for long periods of time without
the engine running.
●If the analog speedometer is illumi-
nated and the engine is not running,
the engine switch is not off. Exit the
vehicle after turning the engine switch
off. However, if the welcome illumina-
tion is operating, the analog speedom-
eter will be illuminated even though
the engine switch is off. (Welcome illu-
mination: P.71)
When stopping the engine with
the shift lever in a position other
than P

1334-2. Driving procedures
4
Driving
shifting to 7, 6, 5 or 4. (P.134)
●When switching the driving mode to
sport mode while driving in the D posi-
tion. ( P.192)
■Restraining sudden start (Drive-Start
Control)
 P.119
■AI-SHIFT
●The AI-SHIFT automatically selects the
suitable gear accordin g to driver perfor-
mance and driving conditions.
The AI-SHIFT automatically operates
when the shift lever is in D. (Shifting the
shift lever to the M position cancels the
function.)
While the engine switch is in IGNITION ON mode, move the shift
lever with the brake pedal depressed.
When shifting the shift lever between P
and D, make sure that the vehicle is com-
pletely stopped.
■Shift lock system
The shift lock system is a system to prevent
accidental operation of the shift lever in
starting.
The shift lever can be shifted from P only
when the engine swit ch is in IGNITION
ON mode and the brake pedal is being
depressed.
■If the shift lever cannot be shifted from P
First, check whether the brake pedal is
being depressed.
If the shift lever cannot be shifted with your
foot on the brake pedal, there may be a
problem with the shift lock system. Have the
vehicle inspected by your Lexus dealer
immediately.
The following steps may be used as an
emergency measure to ensure that the shift
lever can be shifted.
Releasing the shift lock:
1 Set the parking brake.
2 Turn the engine switch to off.
3 Depress the brake pedal.
4 Pry the cover up with a flathead screw-
driver or equivalent tool.
To prevent damage to the cover, cover the
tip of the screwdriver with a rag.
5 Press the shift lock override button.
The shift lever can be shifted while the but-
WARNING
■When driving on slippery road sur-
faces
Be careful of downshifting and sudden
acceleration, as this could result in the
vehicle skidding to th e side or spinning.
Shifting the shift lever