2019 LEXUS RC300 fuel cap

2426-2. Maintenance
RC350AWD_RC350_RC300AWD_RC30
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The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.
When the battery is disconnected
or discharged
Readiness codes that are set during ordi-
nary driving are erased.Also, depending
on your driving habits, the readiness codes
may not be completely set.
When the fuel tank cap is loose
The malfunction indicator lamp comes on
indicating a temporary malfunction and
your vehicle may not pass the I/M test.
The error code in the OBD system will
not be cleared unless the vehicle is
driven 40 or more times.
Contact your Lexus dealer to prepare
the vehicle for re-testing.
Emission inspection and
maintenance (I/M) pro-
grams
Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.
If the malfunction indicator lamp
comes on
Your vehicle may not pass the
I/M test in the following situa-
tions:
When the malfunction indicator
lamp still remains on after sev-
eral driving trips
If your vehicle does not pass the
I/M test

2626-3. Do-it-yourself maintenance
RC350AWD_RC350_RC300AWD_RC30
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1Remove the tire valve cap.
2
Press the tip of the tire pressure
gauge onto the tire valve.
3
Read the pressure using the gauge
gradations.
4
If the tire inflation pressure is not at
the recommended level, adjust the
pressure.
If you add too much air, press the
center of the valve to deflate.
5
After completing the tire inflation
pressure measurem ent and adjust-
ment, apply soapy water to the
valve and check for leakage.
6
Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure
every two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pres-
sure
Driving with incorrect ti re inflation pressure
may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor han-
dling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drivetrain
If a tire needs frequent inflating, have it
checked by your Lexus dealer.
■Instructions for checking tire inflation
pressure
When checking tire inflation pressure,
observe the following:
●Check only when the tires are cold.
If your vehicle has been parked for at
least 3 hours or has not been driven for
more than 1 mile or 1.5 km, you will get an
accurate cold tire in flation pressure read- ing.
●Always use a tire pressure gauge.
It is difficult to judge if a tire is properly
inflated based only on its appearance.
●It is normal for the ti
re inflation pressure
to be higher after driving as heat is gen-
erated in the tire. Do not reduce tire infla-
tion pressure after driving.
●Never exceed the vehicle capacity
weight.
Passengers and luggage weight should
be placed so that the vehicle is balanced.
WARNING
■Proper inflation is critical to save tire
performance
Keep your tires properly inflated.
If the tires are not properly inflated, the
following conditions may occur which
could lead to an accident resulting in
death or serious injury:
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from
overheated tires
●Air leaking from between tire and
wheel
●Wheel deformation and/or tire dam-
age
●Greater possibility of tire damage
while driving (due to road hazards,
expansion joints, sharp edges on the
road, etc.)
NOTICE
■When inspecting and adjusting tire
inflation pressure
Be sure to put the tire valve caps back on.
If a valve cap is not installed, dirt or mois-
ture may get into the valve and cause an
air leak, resulting in decreased tire infla-
tion pressure.

2877-2. Steps to take in an emergency
RC350AWD_RC350_RC300AWD_RC30
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7
When trouble arises
■Master warning light (warning buzzer)
■Tire pressure warning light
■SRS warning light
This warning light system monitors the air-
bag sensor assembly, fr ont impact sensors,
side impact sensors (door), side impact
sensors (front), side impact sensors (rear),
driver’s seat position sensor, driver’s seat
belt buckle switch, front passenger occu-
pant classification system, “AIR BAG ON”
indicator light, “AIR BAG OFF” indicator
light, front passenger’s seat belt buckle
switch, seat belt pret ensioners, airbags,
interconnecting wiring and power sources.
(  P.29)
■Front passenger detection sensor, seat
belt reminder and warning buzzer
●If luggage is placed on the front passen-
ger seat, the front passenger detection
sensor may cause th e warning light to
flash and the warning buzzer to sound
even if a passenger is not sitting in the
seat.
●If a cushion is placed on the seat, the sen-
sor may not detect a passenger, and the warning light may not operate properly.
■If the malfunction indicator lamp comes
on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer as soon as
possible.
■Electric power steering system warning
light (warning buzzer)
When the battery charge becomes insuffi-
cient or the voltage temporarily drops, the
electric power steering system warning
light may come on and the warning buzzer
may sound.
Warning lightDetails/Actions
A buzzer sounds and the warning light comes on and flashes to indicate
that the master warning system has detected a malfunction.
 P.290
Warning lightDetails/Actions
When the light comes on:
Low tire inflation pressure such as
Natural causes ( P.288)
 Flat tire ( P.294)
 Adjust the tire inflation pressure to the specified level. The light will
turn off after a few minutes. In case the light does not turn off even if
the tire inflation pressure is adju sted, have the system checked by
your Lexus dealer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.

3168-1. Specifications
RC350AWD_RC350_RC300AWD_RC30
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8-1.Specifications
*1:Unladen vehicle
*2: Vehicles with 265/35R19 tires
■Vehicle identification number
The vehicle identification number
(VIN) is the legal identifier for your
vehicle. This is the primary identifica-
tion number for your Lexus. It is used in
registering the ownership of your vehi-
cle.
This number is stamped on the top left
of the instrument panel and in the
engine compartment.RC350/RC300 AWD
RC300
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
Overall length185.0 in. (4700 mm)
Overall width72.4 in. (1840 mm)
Overall height*154.9 in. (1395 mm)
Wheelbase107.5 in. (2730 mm)
Tread*1
Front62.2 in. (1580 mm)
Rear63.0 in. (1600 mm)
61.8 in. (1570 mm)
*2
Vehicle capacity weight (Occupants + luggage)700 lb. (320 kg)
Vehicle identification

3188-1. Specifications
RC350AWD_RC350_RC300AWD_RC30
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■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the engine oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level on the
dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is used in
your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil”
or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade
engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good starting
in cold weather. If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20 at
the next oil change.
Fuel
Fuel typeUnleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)17.5 gal. (66.3 L, 14.6 Imp. gal.)
Lubrication system
With filter
RC350
6.0 qt. (5.7 L, 5.0 Imp. qt.)
RC350 AWD/RC300 AWD
6.8 qt. (6.4 L, 5.6 Imp. qt.)
RC300
4.9 qt. (4.6 L, 4.0 Imp. qt.)
Without filter
RC350
5.8 qt. (5.5 L, 4.8 Imp. qt.)
RC350 AWD/RC300 AWD
6.3 qt. (6.0 L, 5.3 Imp. qt.)
RC300
4.5 qt. (4.3 L, 3.8 Imp. qt.)

3338-1. Specifications
RC350AWD_RC350_RC300AWD_RC30
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8
Vehicle specifications
cornering (turning) traction.
■Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. Grade C corresponds to
a level of perfor-
mance which all passenger car tires must
meet under the Fede ral Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine

374Alphabetical Index
RC350AWD_RC350_RC300AWD_RC30
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Seat belts........................................................ 235
Cargo capacity...............................................123
Cargo hooks ...................................................219
Center Display ............................................. 202
Chains ................................................................ 197
Child restraint system Child seats definition................................... 40
Child seats installation....................... 44, 48
Front passenger occupant classification system ............................................................. 36
Installing a CRS to the front passenger seat ....................................................................42
Installing a CRS to the rear seat............ 44
Installing CRS with LATCH anchors . 48
Installing CRS with seat belts.................. 44
Installing CRS with top tether strap.....50
Child safety Airbag precautions.......................................32
Battery precautions ..................... 254, 308
Child restraint system................................. 40
Heated steering wheel or seat heater precautions.................................................. 212
How your child should wear the seat belt 25
Installing child restraints ............................ 40
Moon roof precautions ..............................114
Power window lock switch........................ 111
Removed electronic key battery precau- tions ............................................................... 266
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 40
Trunk precautions ........................................ 89
Cleaning Aluminum wheels ...................................... 232
Exterior ........................................................... 232
Interior ............................................................. 235
Radar sensor..................................................152
Seat belts........................................................ 235
Clock ........................................................ 66, 220
Clock settings ............................................... 220
Coat hooks..................................................... 220
Compass ..........................................................227 Condenser ..................................................... 252
Console box ....................................................218
Consumption screen .................................... 78
Cooling system............................................. 250
Engine overheating.................................. 309
Cornering lights ............................................. 137 Replacing light bulbs ................................270
Cruise control Dynamic radar cruise control............... 168
Cup holders .....................................................218
Current fuel consumption ...........................72
Curtain shield airbags .................................. 28
Customizable features .............................. 339
D
Daytime running light system ...................136
Daytime running lights Replacing light bulbs ................................270
Defogger Outside rear view mirrors.................... 209
Rear window ............................................... 209
Windshield ................................................... 209
Differential Front differential oil. .......................... ...........321
Rear differential oil. ......................................321
Dimension ........................................................316
Dinghy towing................................................. 124
Display Center Display ............................................202
Drive information .......................................... 72
LDA (Lane Departure Alert with steering control) ......................................................... 163
Multi-information display ............................ 71
Warning messages.....................................291
Distance until next engine oil change .... 70
Do-it-yourself maintenance .................... 239
Door courtesy lights .....................................215
Door lock Doors ..................................................................86
Smart access system with push-button start ................................................................... 93
Wireless remote control ...........................84

3751-1. What to do if... (Troubleshooting)
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810375Alphabetical Index
Doors Automatic door lock ing and unlocking
system .............................................................88
Door glasses ................................................... 110
Door lock.......................................................... 86
Open door warning buzzer87, 88, 285
Open door warning light ......................285
Outside rear view mirrors ..................... 108
Drive distance ...................................................72
Drive info 1/Drive info 2/Drive info 3.....72
Drive information ............................................72
Driver’s seat position memory Driving position memory........................ 100
Memory recall function ............................102
Power easy access system .................... 100
Drive-start control ......................................... 117
Driving Break-in tips .....................................................117
Correct driving posture .............................23
Driving mode select switch ................... 190
Procedures ...................................................... 116
Winter drive tips...........................................196
Driving assist system information display.... 76
Driving information display .........................72
Driving position memory........................... 100 Memory recall function ............................102
Power easy access system .................... 100
Driving range ....................................................72
DRS (Dynamic Rear Steering) ................192
Dynamic radar cruise control ................. 168 Warning message.......................... 175, 290
Dynamic Rear Steering (DRS) ................192
E
Eco Driving Indicator.....................................73
Eco Driving Indicator Light .........................73
EDR (Event data recorder) ............................6
Elapsed time ......................................................72
Electric Power Steering (EPS) ................192 Warning light ............................................... 284 Electronic key .................................................. 82
Battery-saving function.............................. 94
If the electronic key does not operate properly ...................................................... 304
Replacing the battery ...............................265
Emergency flashers .....................................274
Emergency, in case of If a warning buzzer sounds...................282
If a warning light turns on.......................282
If a warning message is displayed .... 290
If the battery is discharged ................... 306
If the electronic key does not operate properly ...................................................... 304
If the engine will not start......................... 301
If the fuel filler door cannot be opened ....
303
If the vehicle is trapped in rising water...... 275
If you have a flat tire .................................. 294
If you lose your keys ................................ 303
If you think something is wrong......... 280
If your vehicle becomes stuck .............. 313
If your vehicle has to be stopped in an emergency ................................................. 274
If your vehicle needs to be towed ..... 277
If your vehicle overheats ....................... 309
Engine ACCESSORY mode................................126
Compartment.............................................. 247
Engine switch ................................................ 125
Fuel pump shut off system...................... 281
Hood ................................................................245
How to start the engine ........................... 125
Identification number .................................317
If the engine will not start......................... 301
If your vehicle has to be stopped in an emergency ................................................. 274
Ignition switch (engine switch)............. 125
Overheating ................................................ 309
Tachometer ..................................................... 66
Engine coolant Capacity .......................................................... 319