engine LEXUS RC350 2019 Owners Manual

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6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................ 232
Cleaning and protecting the vehi- cle interior ................................. 235
6-2. Maintenance Maintenance requirements........................................................ 238
General maintenance ............. 239
Emission inspection and mainte- nance (I/M) programs ......... 242
6-3. Do-it-yourself maintenance Do-it-yourself service precautions243
Hood............................................... 245
Positioning a floor jack............ 245
Engine compartment............... 247
Tires ................................................ 255
Tire inflation pressure ............... 261
Wheels........................................... 263
Air conditioning filter...............264
Electronic key battery ............. 265
Checking and replacing fuses ........................................................ 267
Headlight aim.............................. 269
Light bulbs .................................... 270

2336-1. Maintenance and care
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Maintenance and care
ately after use.
●To protect the paint from damage, make
sure to observe the following precau-
tions.
• Do not use acidic, a lkaline or abrasive
detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driving or park-
ing in hot weather
■Brake caliper coating (F SPORT mod-
els)
●When using detergent, use neutral deter-
gent. Do not use hard brushes or abra-
sive cleaners, as they will damage the
paint.
●Do not use detergent on the brake cali-
pers when they are hot.
●Wash detergent off immediately after
use.
■Bumpers
Do not scrub with abrasive cleaners.
■Side windows water-repellent coating
(if equipped)
●The following precautions can extend the
effectiveness of the water-repellent coat-
ing.
• Remove any dirt, etc. from the side win- dows regularly.
• Do not allow dirt and dust to accumulate
on the windows for a long period.
Clean the windows with a soft, damp
cloth as soon as possible.
• Do not use wax or glass cleaners that contain abrasives when cleaning the win-
dows.
• Do not use any metallic objects to remove condensation build up.
●When the water-repellent performance
has become insufficie nt, the coating can
be repaired. Contact your Lexus dealer.
WARNING
■When washing the vehicle
Do not apply water to the inside of the
engine compartment. Doing so may
cause the electrical components, etc. to
catch fire.
■When cleaning the windshield (vehi-
cles with rain-sensing windshield wip-
ers)
Set the wipers to the intermittent wind-
shield wipers. ( P.141)
If AUTO mode is selected, the wipers
may operate unexpectedly in the follow-
ing situations, and may result in hands
being caught or other serious injuries
and cause damage to the wiper blades.
●When the upper part of the windshield
where the raindrop sensor is located is
touched by hand
●When a wet rag or similar is held close
to the raindrop sensor
●If something bumps against the wind-
shield
●If you directly touch the raindrop sen-
sor body or if something bumps into
the raindrop sensor
■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 pi pes until they have
cooled sufficiently, as touching hot
exhaust pipes can cause burns.

2386-2. Maintenance
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6-2.Maintenance
■Repair and replacement
It is recommended that genuine Lexus parts
be used for repairs to ensure performance
of each system. If non-Lexus parts are used
in replacement or if a repair shop other than
a Lexus dealer perfor ms repairs, confirm
the warranty coverage.
■Allow inspection and repairs to be per-
formed by a Lexus dealer
●Lexus technicians are well-trained spe-
cialists and are kept up to date with the
latest service information. They are well
informed about the operations of all sys-
tems on your vehicle.
●Keep a copy of the repa ir order. It proves
that the maintenance that has been per-
formed is under warra nty coverage. If any
problem should arise while your vehicle is
under warranty, your Lexus dealer will
promptly take care of it.
General maintenance should be per-
formed on a daily basis. This can be
done by yourself or by a Lexus dealer.
Scheduled maintenance should be
performed at specified intervals
according to the maintenance sched-
ule.
For details about ma intenance items and
schedules, refer to the “Warranty and Ser-
vice Guide”, “Owner’s Manual Supple-
ment” or “Scheduled Maintenance”.
■Resetting the message indicating main-
tenance is required
After the required maintenance is pre-
formed according to the maintenance
schedule, please reset the message.
To reset the message, follow the procedures
described below:
1
Select on the multi-information dis-
play. ( P.76)
2
Press the or meter control
switch on the steering wheel to select
“Vehicle Settings” then “Scheduled
Maintenance requirements
To ensure safe and economical driv-
ing, day-to-day care and regular
maintenance are essential. It is the
owner’s responsibility to perform
regular checks. Lexus recommends
the maintenance below.
WARNING
■If your vehicle is not properly main-
tained
Improper maintenanc e could result in
serious damage to the vehicle and possi-
ble death or serious injury.
■Handling of the battery
●Engine exhaust, some of its constitu-
ents, and a wide variety of automobile
components contain or emit chemicals
known to the State of California to
cause cancer and birth defects and
other reproductive harm. Work in a
well ventilated area.
●Oils, fuels and fluids contained in vehi-
cles as well as waste produced by
component wear contain or emit
chemicals known to the State of Cali-
fornia to cause cancer and birth
defects or other reproductive harm.
Avoid exposure and wash any affected
area immediately.
●Battery posts, terminals and related
accessories contain lead and lead
compounds which are known to cause
brain damage. Wash your hands after
handling. ( P.253)
General maintenance
Scheduled maintenance

2396-2. Maintenance
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Maintenance and care
Maintenance”. (To confirm setting,
press .)
3
Select “Yes” and then press .
4
A message will be displayed on the
multi-information display when the
reset procedure has been completed.
You can perform some maintenance
procedures by yourself.
Please be aware that do-it-yourself
maintenance may affect warranty cov-
erage.
The use of Lexus repair manuals is recom-
mended.
For details about warranty coverage, refer
to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Man-
ual Supplement” or “Warranty Booklet”.
Do-it-yourself maintenance
General maintenance
Listed below are the general main-
tenance items that should be per-
formed at the intervals specified in
the “Warranty and Service Guide”
or “Owner’s Manual Supplement”.
It is recommended that any prob-
lem you notice should be brought to
the attention of your Lexus dealer
or qualified service shop for advice.
WARNING
■If the engine is running
Turn the engine off and ensure that there
is adequate ventilati on before perform-
ing maintenance checks.
Engine compartment
ItemsCheck points
Battery
Check the indicator (if
equipped) and con-
nections. ( P.253)
Brake fluid
Is the brake fluid at the
correct level?
( P.252)
Engine/inter-
cooler coolant
Is the engine/inter-
cooler coolant at the
correct level?
( P.250)
Engine oil
Is the engine oil at the
correct level?
( P.248)
Exhaust system
There should not be
any fumes or strange
sounds.

2416-2. Maintenance
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Maintenance and care
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

2436-3. Do-it-yourself maintenance
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Maintenance and care
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
Battery condition
(  P.253)
•Warm water
• Baking soda
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Brake fluid level
( P.252)
• SAE J1703 or
FMVSS No.116 DOT
3 brake fluid
• SAE J1704 or FMVSS No.116 DOT
4 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/inter-
cooler coolant
level( P.250)
•“Toyota Super Long
Life Coolant” or a
similar high quality
ethylene gly-
col-based non-sili-
cate, non-amine,
non-nitrite and
non-borate coolant
with long-life hybrid
organic acid tech-
nology
• For the U.S.A.:“Toy- ota Super Long Life
Coolant” is
pre-mixed with 50%
coolant and 50%
deionized water.
•For Canada:“Toyota Super Long Life
Coolant” is
pre-mixed with 55%
coolant and 45%
deionized water.
•Funnel (used only for adding coolant)
Engine oil level
( P.248)
•“Toyota Genuine
Motor Oil” or equiv-
alent
• Rag or paper towel
•Funnel (used only for adding engine oil)
Fuses ( P.267)
•Fuse with same
amperage rating as
original
ItemsParts and tools

2446-3. Do-it-yourself maintenance
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Light bulbs
( P.270)
• 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.252)

Tire inflation pres-
sure ( P.261)• Tire pressure gauge
• Compressed air
source
Washer fluid
( P.254)
• 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.252)
■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.

2476-3. Do-it-yourself maintenance
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Maintenance and care
RC350/RC300 AWD Fuse boxes ( P.267)
Battery ( P.253)
Engine oil level dipstick ( P.248)
Engine coolant reservoir ( P.250)
Engine oil filler cap ( P.248)
Brake fluid reservoir ( P.252)
Washer fluid tank ( P.254)
Electric cooling fans
Condenser ( P.252)
Radiator ( P.252)
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J

2486-3. Do-it-yourself maintenance
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RC300Fuse boxes ( P.267)
Battery ( P.253)
Engine oil level dipstick ( P.248)
Engine oil filler cap ( P.248)
Engine coolant reservoir ( P.250)
Brake fluid reservoir ( P.252)
Washer fluid tank ( P.254)
Electric cooling fans
Condenser ( P.252)
Intercooler radiator ( P.252)
Radiator ( P.252)
Intercooler coolant reservoir ( P.250)
With the engine at operating tempera-
ture and turned off, check the oil level
on the dipstick.
■Checking the engine oil
1 Park the vehicle on level ground.
After warming up the engine and
turning it off, wait more than 5 min-
utes for the oil to drain back into the
bottom of the engine.
A
B
C
D
E
F
G
H
I
J
K
L
Checking and adding the engine
oil

2496-3. Do-it-yourself maintenance
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Maintenance and care
2 Holding a rag under the end, pull
the dipstick out.
RC350/RC300 AWD
RC300
3 Wipe the dipstick clean.
4 Reinsert the dipstick fully.
5 Holding a rag under the end, pull
the dipstick out and check the oil
level.
Low
Normal
Excessive
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
6Wipe the dipstick and reinsert it
fully.
■Checking the oil type and prepar-
ing the item needed
Make sure to check the oil type and
prepare the items needed before add-
ing oil.
 Engine oil selection
P.317
 Oil quantity (Low  Full)
1.6 qt. (1.5 L, 1.3 Imp. qt.)
 Item
Clean funnel
■Adding engine oil
If the oil level is below or near the low
level mark, add engine oil of the same
type as that already in the engine.
RC350/RC300 AWD
A
B
C