warning light LEXUS RC300 2020 Workshop Manual

1954-5. Using the driving support systems
4
Driving
■LDH (Lexus Dynamic Handling
system) (if equipped)
Provides integrated control of the
VGRS, DRS and EPS. Contributes to
turning characteristics at low speeds,
responsiveness at medium speeds and
safety at high speeds by controlling the
steering angle of the front and rear
wheels in accordance with the steering
wheel operation and vehicle speed.
■VDIM (Vehicle Dynamics Inte-
grated Management)
Provides integrated control of the
ABS, brake assist, TRC, VSC, hill-start
assist control, EPS, VGRS (if
equipped) and DRS (if equipped) sys-
tems
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, engine output,
steering assist, and if equipped with
VGRS, steering ratio
■When the TRAC/VSC systems are
operating
The slip indicator light will flash while the
TRAC/VSC systems are operating.
■Disabling the TRAC system
If the vehicle gets stuck in mud, dirt or snow,
the TRAC system may reduce power from
the engine to the wheels. Pressing the
switch to turn the system off may make it
easier for you to rock the vehicle in order to free it.
To turn the TRAC system off, quickly press
and release the switch.
The “Traction Co
ntrol Turned Off” will be
shown on the multi-information display.
Press the switch ag ain to turn the sys-
tem back on.
■Turning off both TRAC and VSC sys-
tems
To turn the TRAC and VSC systems off,
press and hold the switch for more
than 3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on
and the “Traction Control Turned Off” will
be shown on the multi-information display.
*
Press the switch ag ain to turn the sys-
tems back on.
*: On vehicles with PCS (Pre-Collision System), pre-collision brake assist,
pre-collision braking, and steering con-
trol (performed through cooperative
control of PCS and LDH) (if equipped)
will also be disabled. The Pre-Collision
System warning light will come on and a
message will be di splayed on the
multi-information display. ( P.162)

1974-5. Using the driving support systems
4
Driving
input over an extended period of time. The
steering wheel may feel heavy as a result.
Should this occur, refrain from excessive
steering input or stop the vehicle and turn
the engine off. The EPS system should
return to normal within 10 minutes.
WARNING
■The ABS does not operate effectively
when
●The limits of tire gripping performance
have been exceeded (such as exces-
sively worn tires on a snow covered
road).
●The vehicle hydroplanes while driving
at high speed on wet or slick roads.
■Stopping distance when the ABS is
operating may exceed that of normal
conditions
The ABS is not designed to shorten the
vehicle’s stopping di stance. Always main-
tain a safe distance from the vehicle in
front of you, especially in the following
situations:
●When driving on dirt, gravel or
snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes
or uneven surfaces
■TRAC may not operate effectively
when
Directional control and power may not
be achievable while driving on slippery
road surfaces, even if the TRAC system is
operating. Drive the vehicle carefully in
conditions where stability and power
may be lost.
■Hill-start assist control does not oper-
ate effectively when
●Do not overly rely on hill-start assist
control. Hill-start assist control may
not operate effectively on steep
inclines and roads covered with ice.
●Unlike the parking brake, hill-start
assist control is not intended to hold
the vehicle stationary for an extended
period of time. Do not attempt to use
hill-start assist control to hold the vehi-
cle on an incline, as doing so may lead
to an accident.
■When the VSC is activated
The slip indicator light flashes. Always
drive carefully. Reckless driving may
cause an accident. Exercise particular
care when the indicator light flashes.
■When the TRAC/VSC systems are
turned off
Be especially careful and drive at a speed
appropriate to the road conditions. As
these are the systems to help ensure
vehicle stability and driving force, do not
turn the TRAC/VSC systems off unless
necessary.
■Replacing tires
Make sure that all ti res are of the speci-
fied size, brand, tread pattern and total
load capacity. In addition, make sure that
the tires are inflated to the recom-
mended tire inflation pressure level.
The ABS, TRAC and VSC systems will
not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further
information when replacing tires or
wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or
modifying the suspensi on will affect the
driving assist systems, and may cause a
system to malfunction.

2145-2. Using the air conditioning system
*: If equipped
Turn the heated steering wheel on/off
The indicator light comes on when the
WARNING
●Do not place anything on the instru-
ment panel which may cover the air
outlets. Otherwise, air flow may be
obstructed, preventing the windshield
defoggers from defogging.
■To prevent burns
●Do not touch the rear view mirror sur-
faces when the outside rear view mir-
ror defoggers are on.
●Do not touch the glass at lower part of
the windshield or to the side of the
front pillars when the windshield wiper
de-icer is on.NOTICE
■To prevent battery discharge
Do not leave the air conditioning system
on longer than necessary when the
engine is stopped.
Heated steering wheel*/seat
h
eaters*/seat ventilators*
Heated steering wheel and seat
heaters heat the side grips of the
steering wheel and seats, respec-
tively. Seat ventilators maintain
good ventilation using a fan built
into the seat.
WARNING
■To prevent minor burn injuries
Care should be taken if anyone in the fol-
lowing categories comes in contact with
the steering wheel or seats when the
heater is on:
●Babies, small children, the elderly, the
sick and the physically challenged
●Persons with sensitive skin
●Persons who are fatigued
●Persons who have taken alcohol or
drugs that induce sleep (sleeping
drugs, cold remedies, etc.)
NOTICE
■To prevent damage to the seat heat-
ers and seat ventilators
Do not put heavy objects that have an
uneven surface on the seat and do not
stick sharp objects (n eedles, nails, etc.)
into the seat.
■To prevent battery discharge
Do not use the functions when the
engine is off.
Heated steering wheel
A

2155-2. Using the air conditioning system
5
Interior features
heated steering wheel is operating.
■Operation condition
The engine switch is in IGNITION ON
mode.
■Timer function
The heated steering wheel will automati-
cally turn off after about 30 minutes.
Vehicles without seat ventilators
Each time the switch is pressed, the
intensity of the seat heater changes
and the level indicator lights (amber) light as follows:
Hi (3 segments lit) Mid (2 segments
lit)  Lo (1 segment lit) Off
Vehicles with seat ventilators
Each time the switch is pressed, the
intensity of the seat heater changes
and the level indicator lights (amber) light as follows:
Hi (3 segments lit) Mid (2 segments
lit)  Lo (1 segment lit) Off
■Operation condition
The engine switch is in IGNITION ON
mode.
■Seat heater timer control
To enable seat heater timer control, press
and hold the driver and front passenger
seat heater switches at the same time when
the vehicle is stopped until a buzzer sounds
once. If a seat heater is turned on while seat
heater timer control is enabled, the intensity
of the seat heater w ill automatically change
from Hi Mid Lo.
The timing of the chan ge in seat heater
intensity differs depending on the tempera-
ture inside the cabin, etc. when the seat
heater is operating.
To disable seat heater timer control, press
and hold the driver and front passenger
seat heater switches at the same time until a
buzzer sounds twice.
Seat heaters
A
WARNING
■To prevent overheating and minor
burn injuries
Observe the following precautions when
using the seat heaters.
●Do not cover the seat with a blanket or
cushion when using the seat heater.
●Do not use seat heater more than nec-
essary.
A

2195-4. Using the storage features
5
Interior features
5-4.Using the storage features
Glove box (P.219)
Cup holders ( P.220)
Console box ( P.220)
1
Open (press the button)
2
Unlock with the mechanical key
3
Lock with the mechanical key
List of storage features
Location of the storage features
A
B
C
WARNING
■Items that should not be left in the
storage spaces
Do not leave glasses, lighters or spray
cans in the storage spaces, as this may
cause the following when cabin tempera-
ture becomes high:
●Glasses may be deformed by heat or
cracked if they come into contact with
other stored items.
●Lighters or spray cans may explode. If
they come into contact with other
stored items, the lighter may catch fire
or the spray can may release gas,
causing a fire hazard.
Glove box

2205-4. Using the storage features
■Glove box light
The glove box light turns on when the
engine switch is in ACCESSORY or IGNI-
TION ON mode.
■Trunk opener main switch
The trunk opener main switch is located in
the glove box. ( P.92)
■Removing the partition
The insert inside the glove box can be
removed.
Push the knob.
Lift by hand to fully open the console box.
WARNING
■Caution while driving
Keep the glove box closed. In the event
of sudden braking or sudden swerving,
an accident may occur due to an occu-
pant being struck by the open glove box
or the items stored inside.
Cup holders
WARNING
■Items unsuitable for the cup holder
Do not place anything other than cups or
aluminum cans in the cup holders.
Other items may be thrown out of the
holders in the event of an accident or
sudden braking, causing injury. If possi-
ble, cover hot drinks to prevent burns.
Console box
WARNING
■Caution while driving
Keep the console box closed.
Injuries may result in the event of an acci-
dent or sudden braking.

2245-5. Using the other interior features
The HomeLink® wireless control sys-
tem in your vehicle has 3 buttons which
can be programmed to operate 3 dif-
ferent devices. Refer to the program-
ming methods on the following pages
to determine the method which is
appropriate for the device.
HomeLink
® indicator light
Garage door operation indicators
HomeLink
® icon
Illuminates while HomeLink® is operating.
Buttons
■Codes stored in the HomeLink® mem-
ory
●The registered codes are not erased even
if the battery cable is disconnected.
●If learning failed wh en registering a dif-
ferent code to a HomeLink® button that
already has a code registered to it, the already registered code will not be
erased.
■When support is necessary
Visit on the web at
www.homelink.com/lexus
or call
1-800-355-3515.
■Before programming HomeLink®
 During programming, it is possible
that garage doors, gates, or other
devices may operate. For this rea-
son, make sure that people and
objects are clear of the garage door
or other devices to prevent injury or
other potential harm.
 It is recommended that a new bat-
Garage door opener
The garage door opener can be
programmed to operate garage
doors, gates, entry doors, door
locks, home lighting systems, secu-
rity systems, and other devices.
System components
A
B
C
D
WARNING
■When programming a garage door or
other remote control device
The garage door or other device may
operate, so ensure people and objects
are out of danger to prevent potential
harm.
■Conforming to federal safety stan-
dards
Do not use the HomeLink
® compatible
transceiver with any garage door opener
or device that lacks safety stop and
reverse features as required by federal
safety standards.
This includes any garage door that can-
not detect an interf ering object. A door
or device without these features
increases the risk of death or serious
injury.
■When operating or programming
HomeLink®
Never allow a child to operate or play
with the HomeLink® buttons.
Programming the HomeLink®

2366-1. Maintenance and care
WARNING
■Precautions regarding the exhaust
pipes
As exhaust gases cause the exhaust
pipes to become quite hot, do not touch
the exhaust pipes while the engine is run-
ning or immediately after the engine is
turned off.
When washing the vehicle, be careful not
to touch the exhaust pipes until they have
cooled sufficiently, as touching hot
exhaust pipes can cause burns.
■Precaution regarding the rear
bumper with Blind Spot Monitor (if
equipped)
If the paint of the rear bumper is chipped
or scratched, the system may malfunc-
tion. If this occurs, consult your Lexus
dealer.
NOTICE
■To prevent paint deterioration and
corrosion on the body and compo-
nents (aluminum wheels, etc.)
●Wash the vehicle immediately in the
following cases:
• After driving near the sea coast
• After driving on salted roads
• If coal tar or tree sap is present on the paint surface
• If dead insects, insect droppings or bird droppings are present on the
paint surface
• After driving in an area contaminated with soot, oily smoke, mine dust, iron
powder or chemical substances
• If the vehicle becomes heavily soiled with dust or mud
• If liquids such as benzene and gasoline are spilled on the paint surface
●If the paint is chip ped or scratched,
have it repaired immediately.
●To prevent the wheels from corroding,
remove any dirt and store in a place
with low humidity when storing the
wheels.
■Cleaning the exterior lights
●Wash carefully. Do not use organic
substances or scrub with a hard brush.
This may damage the surfaces of the
lights.
●Do not apply wax to the surfaces of the
lights.Wax may cause damage to the
lenses.
■To prevent damage to the windshield
wiper arms
When lifting the wiper arms away from
the windshield, pull the driver side wiper
arm upward first, and repeat for the pas-
senger side. When returning the wipers
to their original position, do so from the
passenger side first.
■When using an automatic car wash
(vehicles with rain-sensing windshield
wipers)
Set the wipers to the intermittent wind-
shield wipers. (
P.142)
If AUTO mode is selected, the wipers
may operate and the wiper blades may
be damaged.
■When using a high pressure car wash
●When washing the vehicle, do not
spray the camera or its surrounding
area directly with a high pressure
washer. Shock applied from high pres-
sure water may cause the device to not
operate normally.
●Do not bring the nozzle tip close to
boots (rubber or resin manufactured
cover), connectors or the following
parts. The parts may be damaged if
they come into contact with high-pres-
sure water.
• Traction related parts
• Suspension parts
• Steering parts

2386-1. Maintenance and care
Remove dirt and dust using a vac-
WARNING
■Water in the vehicle
●Do not splash or spill liquid in the vehi-
cle.
Doing so may cause electrical compo-
nents, etc. to malfunction or catch fire.
●Do not get any of the SRS components
or wiring in the vehicle interior wet.
(  P.28)
An electrical malfunction may cause the
airbags to deploy or not function prop-
erly, resulting in death or serious injury.
■Cleaning the interior (especially
instrument panel)
Do not use polish wax or polish cleaner.
The instrument panel may reflect off the
windshield, obstructing the driver’s view
and leading to an accident, resulting in
death or serious injury.
NOTICE
■Cleaning detergents
●Do not use the following liquids, as
they may discolor the vehicle interior
or cause streaks or damage to painted
surfaces:
• Center Display: Organic substances such as benzine or gasoline, alkaline
solutions, and alcohol
• Seats: Alkaline solutions, organic sub- stances such as thinner or benzine,
and alcohol
• Other parts: Organic substances such as benzine or gasoline, alkaline or
acidic solutions, dye, and bleach
●Do not use polish wax or polish
cleaner. The instrument panel’s or
other interior part’s painted surface
may be damaged.
■Preventing damage to leather sur-
faces
Observe the following precautions to
avoid damage to and deterioration of
leather surfaces:
●Remove any dust or dirt from leather
surfaces immediately.
●Do not expose the vehicle to direct
sunlight for extended periods of time.
Park the vehicle in the shade, espe-
cially during summer.
●Do not place items made of vinyl, plas-
tic, or containing wax on the uphol-
stery, as they may stick to the leather
surface if the vehicle interior heats up
significantly.
■Water on the floor
Do not wash the vehicle floor with water.
Vehicle systems such as the audio system
may be damaged if water comes into
contact with electrical components such
as the audio system above or under the
floor of the vehicle. Water may also
cause the body to rust.
■When cleaning the inside of the wind-
shield
Do not allow glass cleaner to contact the
lens. Also, do not touch the lens.
(  P.152)
■Cleaning the inside of the rear win-
dow
●Do not use glass cleaner to clean the
rear window, as this may cause dam-
age to the rear window defogger
heater wires or antenna. Use a cloth
dampened with lukewarm water to
gently wipe the window clean. Wipe
the window in strokes running parallel
to the heater wires or antenna.
●Be careful not to scratch or damage
the heater wires or antenna.
Cleaning the leather areas

2466-3. Do-it-yourself maintenance
Light bulbs
( P.272)
• Bulb with same num-
ber and wattage rat-
ing as original
• Phillips-head screw- driver
• Flathead screw- driver
• Wrench
Radiator, con-
denser and inter-
cooler radiator
(  P.254)

Tire inflation pres-
sure ( P.263)• Tire pressure gauge
• Compressed air
source
Washer fluid
( P.256)
• 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.
ItemsParts and tools●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●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.254)
■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.