run flat LEXUS RCF 2021 Owners Manual

13Pictorial index
Windshield wipers .................................................................................................. P.143
Precautions for winter season ..................................................................................... P.204
To prevent freezing (windshield wiper de-icer)
*................................................... P.217
Precautions against car wash ............................. ......................................................... P.242
Fuel filler door ..........................................................................................................P.150
Refueling method .............................................................................................................. P .150
Fuel type/fuel tank capacity ...... ................................................................................... P.343
Tires.......................................................................................................................... ..P.273
Tire size/inflation pressure ............................ ............................................................... P.347
Winter tires.......................................................................................................................... P.204
Checking/rotation/tire pressure warning system.............................................. P.273
Coping with flat tires............................................................................................... P.313, 319
Hood .......................................................................................................................... P.264
Opening ........................................................................................................................ ....... P.264
Engine oil ..................................................................................................................... ......... P.343
Coping with overheating ............................................................................................... P.337
Warning messages ........................................................................................................... P.31 0
Active rear wing
*.................................................................................................... P.195
Headlights .................................................................................................................P.13 8
Parking lights/daytime running lights...............................................................P.138
Turn signal lights ...................................................................................................... P.136
Side marker lights ...................................................................................................P.138
Tail lights .................................................................................................................... P.138
Stop lights
License plate lights .................................................................................................P.138
Back up lights
Shifting the shift lever to R .............................................................................................. P.13 3
*:If equipped
Light bulbs of the exterior lights for driving(Replacing method: P.288, Watts: P.348)
D
E
F
G
H
I
J
K
L
M
N
O

1634-5. Using the driving support systems
4
Driving
• The vehicle is wobbling.
• The vehicle is being driven at extremely high speeds.
• When driving on a hill
• If the radar sensor or front camera is mis- aligned
●In some situations such as the following,
sufficient braking force may not be
obtained, preventing the system from
performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained (brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery surface
●Some pedestrians such as the following
may not be detected by the radar sensor
and front camera, preventing the system
from operating properly:
• Pedestrians shorter than approximately 3.2 ft. (1 m) or tall er than approximately
6.5 ft. (2 m)
• Pedestrians wearing oversized clothing (a rain coat, long skirt, etc.), making their
silhouette obscure
• Pedestrians who are carrying large bag- gage, holding an umbrella, etc., hiding
part of their body
• Pedestrians who are bending forward or squatting
• Pedestrians who are pushing a stroller, wheelchair, bicycle or other vehicle
• Groups of pedestrians which are close
together
• Pedestrians who are wearing white and look extremely bright
• Pedestrians in the dark, such as at night or while in a tunnel
• Pedestrians whose clothing appears to
be nearly the same co lor or brightness as
their surroundings
• Pedestrians near walls , fences, guardrails,
or large objects
• Pedestrians who are on a metal object (manhole cover, steel plate, etc.) on the
road
• Pedestrians who are walking fast
• Pedestrians who are changing speed abruptly • Pedestrians running out from behind a
vehicle or a large object
• Pedestrians who are extremely close to
the side of the vehicle (outside rear view
mirror, etc.)
■If VSC is disabled
●If VSC is disabled ( P.199), the pre-col-
lision brake assist and pre-collision brak-
ing functions are also disabled.
●The PCS warning light will turn on and
“VSC Turned Off Pre-Collision Brake
System Unavailable” will be displayed on
the multi-information display.

2606-3. Maintenance
Seats• Do the seat controls operate properly?
Steering wheel
• Does the steering wheel rotate
smoothly?
• Does the steering wheel have the cor-
rect amount of free
play?
•There should not be any strange sounds
coming from the
steering wheel.
Vehicle exterior
ItemsCheck points
Doors/trunk• Do the doors/trunk operate smoothly?
Engine hood
•Does the engine hood lock system
work properly?
Fluid leaks
•There should not be any signs of fluid
leakage after the
vehicle has been
parked.
ItemsCheck points
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or
excessively worn.
• Have the tires been rotated according to
the maintenance
schedule?
•The wheel nuts should not be loose.
Windshield wip-
ers
• The wiper blades should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.
• The wiper blades should clear the
windshield without
streaking or skip-
ping.
ItemsCheck points

2636-4. Do-it-yourself maintenance
6
Maintenance and care
Light bulbs
( P.288)
•Bulb with same num-
ber and wattage rat-
ing as original
• Phillips-head screw- driver
•Flathead screw- driver
•Wrench
Radiator and con-
denser ( P.270)
Tire inflation pres-
sure ( P.279)• Tire pressure gauge
•Compressed air
source
Washer fluid
( P.272)
• Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●Keep hands, clothi ng and tools away
from the moving fans and engine drive
belt.
●Be careful not to touch the engine,
radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil
and other fluids may also be hot.
●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
ItemsParts and tools●Do not smoke, cause sparks or expose
an open flame to fuel or the battery.
Fuel and battery fumes are flammable.
●Be extremely cautious when working
on the battery. It contains poisonous
and corrosive sulfuric acid.
■When working near the electric cool-
ing fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION
ON mode, the electric cooling fans may
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( P.270)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.

2766-4. Do-it-yourself maintenance
If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. ( P.307)
■Routine tire inflation pressure checks
The tire pressure warning system does not
replace routine tire inflation pressure
checks. Make sure to check tire inflation
pressure as part of your routine of daily
vehicle checks.
■Situations in which the tire pressure
warning system may not operate prop-
erly
●In the following cases, the tire pressure
warning system may not operate prop-
erly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is
not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is
not of the specified size.
• Tire chains, etc. are equipped.
• An auxiliary-supported run-flat tire is
equipped.
• If a window tint that affects the radio wave
signals is installed.
• If there is a lot of snow or ice on the vehi- cle, particularly around the wheels or
wheel housings.
• If the tire inflation pressure is extremely
higher than the specified level.
• If tires not equipped with tire pressure warning valves and transmitters are used.
• If the ID code on the tire pressure warn- ing valves and transmitters is not regis-
tered in the tire pressure warning
computer.
●Performance may be af fected in the fol-
lowing situations.
• Near a TV tower, electric power plant, gas station, radio stat ion, large display,
airport or other fac ility that generates
strong radio waves or electrical noise
• When carrying a portable radio, cellular
phone, cordless phone or other wireless
communication device
If tire position information is not correctly
displayed due to the radio wave conditions,
the display may be corrected by driving and
changing the radio wave conditions.
●When the vehicle is parked, the time
taken for the warning to start or go off
could be extended.
●When tire inflation pr essure declines rap-
idly for example when a tire has burst, the
warning may not function.
WARNING
■Caution regarding interference with
electronic devices
●People with implantable cardiac pace-
makers, cardiac resynchronization
therapy-pacemakers or implantable
cardioverter defibrillators should not
come within 17.7 in. (450 mm) of the
tire pressure warning system initiators.
The radio waves may affect the opera-
tion of such devices.

2896-4. Do-it-yourself maintenance
6
Maintenance and care
Stop/tail lights
 Back-up lights
 High mounted stoplight
 License plate lights
■LED light bulbs
The lights other than the rear turn signal
lights each consist of a number of LEDs. If
any of the LEDs burn out, take your vehicle
to your Lexus dealer to have the light
replaced.
■Condensation build-up on the inside of
the lens
Temporary condensation build-up on the
inside of the headlight lens does not indi-
cate a malfunction. Contact your Lexus
dealer for more information in the following
situations:
●Large drops of water ha ve built up on the
inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
 P.287
■Rear turn signal lights
1 Open the trunk and apply protec-
tive tape to the peripheral of the
taillight and the vehicle body
around the taillight.
Use masking tape, etc. Do not use duct
tape, as it may leave residue or damage the paint when removed.
2
Using a flathead screwdriver,
remove the cover.
To prevent scratching the vehicle, wrap the
tip of the flathead scre wdriver with a cloth,
etc.
3 Remove the 2 screws.Replacing light bulbs

2987-2. Steps to take in an emergency
The following may indicate a problem
with your transmission. Contact your
Lexus dealer or commercial towing
service before towing.
The engine is running but the vehi-
cle does not move.
 The vehicle makes an abnormal
sound.
From the front
Use a towing dolly under the rear
wheels.
From the rear
Use a towing dolly under the front
wheels. When using a flat-bed truck to trans-
port the vehicle, use tire strapping
belts. Refer to the owner's manual of
the flat-bed truck for the tire strapping
method.
In order to suppress vehicle movement
during transportation, set the parking
brake and turn the engine switch off.
If a tow truck is not available in an
emergency, your vehicle may be tem-
porarily towed using cables or chains
secured to the emergency towing eye-
lets. This should only be attempted on
hard surfaced roads for at most 50
miles (80 km) at under 18 mph (30
km/h).
A driver must be in the vehicle to steer
and operate the brakes. The vehicle’s
wheels, drive train, axles, steering and
brakes must be in good condition.
Situations when it is necessary to
contact dealers before towing
Towing with a wheel-lift type
truck
NOTICE
■Towing with a sling-type truck
Do not tow with a sling-type truck to pre-
vent body damage.
Using a flatbed truck
Emergency towing

2997-2. Steps to take in an emergency
7
When trouble arises
To have your vehicle towed by another
vehicle, the towing eyelet must be
installed to your vehicle. Install the tow-
ing eyelet using the following proce-
dure.
1Take out the towing eyelet.
(P.314, 320)
2 Remove the eyelet cover using a
flathead screwdriver.
To protect the bodywork, place a rag
between the screwdriver and the vehicle
body as shown in the illustration.
3Insert the towing eyelet into the
hole and tighten partially by hand. 4
Tighten down the towing eyelet
securely using a phillips-head
screwdriver or hard metal bar.
5 Securely attach cables or chains to
the towing eyelet.
Take care not to damage the vehi-
cle body.
6 Enter the vehicle being towed and
start the engine.
If the engine does not start, turn the
engine switch to IGNITION ON
mode.
7 Shift the shift lever to N and release
the parking brake.
When the shift lever cannot be
shifted: P.133
■While towing
If the engine is not running, the power assist
for the brakes and steering will not function,
making steering and braking more difficult.
■Wheel nut wrench
Wheel nut wrench is installed in trunk.
(  P.314, 320)
Emergency towing procedure

3007-2. Steps to take in an emergency
Fluid leaks under the vehicle.
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
continually points higher than nor-
mal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking 
Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong
If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

3267-2. Steps to take in an emergency
Turn the compressor switch off and then
check the tire inflation pressure. Being
careful not to over inflate, check and
repeat the inflation pr ocedure until the rec-
ommended tire inflation pressure is
reached.
If the tire inflation pre ssure is still lower than
the recommended level after inflation for
10 minutes (35 minutes at low tempera-
ture) with the switch on, the tire is too dam-
aged to be repaired. Turn the compressor
switch off and contact your Lexus dealer.
If the tire inflation pressure exceeds the
recommended level, let out some air to
adjust the tire inflation pressure. ( P.327,
347)
14 With the compressor switch off, dis-
connect the hose from the valve on
the tire and then pull out the power
plug from the power outlet socket.
Some sealant may leak when the hose is
removed.
15Install the valve cap onto the valve
of the emergency repaired tire.
16 Attach the air release cap to the
end of the hose.
If the air release cap is not attached, the
sealant may leak and the vehicle may get
dirty.
17Temporarily store the bottle in the
trunk while it is connected to the
compressor.
18 To spread the liquid sealant evenly
within the tire, immediately drive safely for about 3 miles (5 km)
below 50 mph (80 km/h).
19 After driving, stop your vehicle in a
safe place on a hard, flat surface
and reconnect the compressor.
20 Turn the compressor switch on and
wait for several seconds, then turn it
off. Check the tire inflation pres-
sure.
If the tire inflatio n pressure is below
19 psi (130 kPa, 1.3 kgf/cm
2 or bar):
The puncture cannot be repaired.
Contact your Lexus dealer.
If the tire inflation pressure is
between 19 psi (130 kPa, 1.3
kgf/cm
2 or bar) and a point below
the recommended level: The tire
can be repaired. Proceed to step
21 .
If the tire inflation pressure is at the
recommended level: Proceed to
A
B
C