radiator cap LEXUS RC350 2021 Owners Manual

2576-3. Do-it-yourself maintenance
6
Maintenance and care
RC350/RC300 AWDFuse boxes ( P.278)
Battery ( P.263)
Engine oil level dipstick ( P.258)
Engine coolant reservoir ( P.260)
Engine oil filler cap ( P.258)
Brake fluid reservoir ( P.262)
Washer fluid tank ( P.264)
Electric cooling fans
Condenser ( P.262)
Radiator ( P.262)
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J

2586-3. Do-it-yourself maintenance
RC300Fuse boxes ( P.278)
Battery ( P.263)
Engine oil level dipstick ( P.258)
Engine oil filler cap ( P.258)
Engine coolant reservoir ( P.260)
Brake fluid reservoir ( P.262)
Washer fluid tank ( P.264)
Electric cooling fans
Condenser ( P.262)
Intercooler radiator ( P.262)
Radiator ( P.262)
Intercooler coolant reservoir ( P.260)
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

2626-3. Do-it-yourself maintenance
Check the radiator, condenser and
intercooler radiator and clear away
any foreign objects.
If any of the above parts are extremely
dirty or you are not sure of their condi-
tion, have your vehicle inspected by
your Lexus dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
RC350/RC300 AWD
RC300
■Adding fluid
Make sure to check the fluid type and
prepare the necessary item.
 Fluid type
SAE J1703 or FMVSS No.116 DOT 3
brake fluid
SAE J1704 or FMVSS No.116 DOT 4
brake fluid
Item
Clean funnel
WARNING
■When the engine is hot
Do not remove the engine coolant reser-
voir cap, intercooler coolant reservoir
cap and coolant inlet cap. ( P.325)
The cooling system may be under pres-
sure and may spray hot coolant if the cap
is removed, causing serious injuries, such
as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor
straight antifreeze. The correct mixture
of water and antifreeze must be used to
provide proper lubrication, corrosion
protection and cooling. Be sure to read
the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to pre-
vent it from damagi ng parts or paint.
Checking the radiator, con-
denser and intercooler radiator
(if equipped)
WARNING
■When the engine is hot
Do not touch the radiator, condenser or
intercooler radiator as they may be hot
and cause serious injuries, such as burns.
Checking and adding the brake
fluid

3237-2. Steps to take in an emergency
7
When trouble arises
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
RC300
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the full (“FULL” or “F”)
and low (“LOW” or “L”) lines on the
reservoir.
 Engine (RC350/RC300 AWD) Reservoir cap
“FULL” or “F”
“LOW” or “L”
 Engine (RC300)
Reservoir cap
“FULL” or “F”
“LOW” or “L”
 Intercooler (RC300)
Reservoir cap
“FULL” or “F”
“LOW” or “L”
A
B
A
B
A
B
C
A
B
C
A
B
C

3257-2. Steps to take in an emergency
7
When trouble arises
WARNING
●RC350/RC300 AWD: While the
engine and radiator are hot, do not
loosen or remove the coolant reser-
voir cap or coolant inlet cap. (The
coolant inlet cap is located under the
engine cover.)
High temperature steam or coolant
could spray out.
●RC300: While the engine and radia-
tors are hot, do not loosen or remove
the coolant reservoir cap, coolant inlet
cap, or intercooler coolant reservoir
cap.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●Do not use any coolant additive.

392Alphabetical Index
Power easy access system ........................102
Power outlet .................................................. 230
Power steering (Electric power steering
system)............................................................201 Warning light ............................................... 297
Power windows Door lock linked window operation... 113
Jam protection function..............................112
Operation..........................................................112
Window lock switch ................................... 113
Pre-Collision System (PCS) Function ............................................................ 162
PCS OFF switch ..........................................164
Warning light ...............................................298
Warning message.....................................303
R
Radar cruise control (dynamic radar cruise control with full-speed range)............... 176
Radiator ........................................................... 262
RCTA Function ............................................................. 191
Rear Cross Traffic Alert (RCTA) ............ 191
Rear seats .......................................................... 101 Head restraints ............................................ 105
Seat heaters .................................................. 223
Seat ventilators............................................ 223
Rear side marker lights Light switch ..................................................... 142
Rear turn signal lights Turn signal lever ...........................................136
Wattage..........................................................338
Rear view mirror Inside rear view mirror............................. 109
Outside rear view mirrors ....................... 110
Rear window defogger ...............................219
Refueling Capacity .........................................................330
Fuel types.......................................................330
If the fuel filler door cannot be opened...........................................................................316
Opening the fuel tank cap ..................... 155 Remote Touch ................................................210
Replacing
Electronic key battery .............................. 277
Fuses................................................................. 278
Light bulbs ...................................................... 281
Tires ..................................................................307
Resetting the message indicating mainte- nance is required ...................................... 248
Rev indicator .................................................... 69
Rev peak............................................................. 69
S
Seat belt reminder light............................. 299
Seat belts............................................................ 24 Automatic Locking Retractor................. 26
Child restraint system installation ..40, 41
Cleaning and maintaining the seat belt..........................................................................245
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt ............................................................................. 25
Pregnant women, proper seat belt use ............................................................................. 24
Reminder light and buzzer ...................299
Seat belt extender......................................... 25
Seat belt pretensioners .............................. 27
SRS warning light.......................................296
Seat heaters ................................................... 223
Seat position memory..................................102
Seat ventilators ............................................. 223
Seating capacity.............................................125
Seats Adjustment ....................................................... 99
Cleaning .........................................................245
Driving position memory ........................ 102
Head restraints............................................. 105
Power easy access system .................... 102
Properly sitting in the seat ........................ 23
Seat heaters .................................................. 223
Seat position memory .............................. 102
Seat ventilators ............................................ 223