2021 LEXUS RC350 ignition

3328-1. Specifications
*: The fluid capacity is a reference quantity. If replacement is necessary, contact your Lexus dealer.
■Spark plug
Cooling system
Capacity*
RC350/RC3
00 AWD10.0 qt. (9.5 L, 8.4 Imp. qt.)
RC300
Gasoline engine
8.5 qt. (8.0 L, 7.0 Imp. qt.)
Intercooler
3.3 qt. (3.1 L, 2.7 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug)
RC350/RC300 AWDRC300
MakeDENSO FK20HBR8NGK DILFR7K9G
Gap0.031 in. (0.8 mm)0.035 in. (0.9 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system (battery)
Open voltage at 68°F (20°C):
12.3 V or higher
If the voltage is lower than the standard value,
charge the battery.
(Voltage is checked 20 minutes after the engine
and all lights are turned off.)
Charging rates5 A max.

3608-2. Customization
function cannot be customized.
●When the doors remain closed after
unlocking the doors and the timer acti-
vated automatic door lock function acti-
vates, signals will be generated in
accordance with the operation buzzer
volume and operational signal (Emer-
gency flashers) function settings.
●Some settings can be changed using a
switch or the Center Display. If a setting is
changed using a switch, the changed set-
ting will not be reflected on the Center
Display screen until the engine switch is
turned off and then to IGNITION ON
mode.

382What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.316)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.316)
 Is the electronic key battery weak or
depleted? ( P.277)
 Is the engine switch in IGNITION
ON mode?
When locking the doors, turn the engine
switch off. ( P.129)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop-
erly due to the condition of the radio
wave. ( P.96)
 The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. ( P.93)
 Did you press the engine switch
while firmly depressing the brake
pedal? ( P.127)
 Is the shift lever in P? ( P.127)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.95)
 Is the steering wheel unlocked?
( P.127)
 Is the electronic key battery weak or
depleted?
In this case, the engine can be started in a
temporary way. ( P.318)
 Is the battery discharged? ( P.319)
 Is the engine switch in IGNITION
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The trunk lid is closed with the
electronic key left inside
If you think something is wrong
The engine does not start
The shift lever cannot be shifted
from P even if you depress the
brake pedal

383What to do if... (Troubleshooting)
ON mode?
If you cannot release the shift lever by
depressing the brake pedal with the engine
switch in IGNITION ON mode. (P.132)
 It is locked automatically to prevent
theft of the vehicle. ( P.127)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.113)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY or IGNITION ON
mode (the engine is not running) for
a period of time. ( P.130)
 The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( P.299)
 The parking brake indicator is on
Is the parking brake released? ( P.137)
Depending on the situation, other types of warning buzzer may also
sound. (
P.295, 303)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.57)
Do one of the following to deactivate
or stop the alarm:
 Unlock the doors.
 Open the trunk using the entry
function or wireless remote control.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine.
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( P.303)
 When a warning light turns on or a
warning message is displayed, refer
to P.295, 303.
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed

388Alphabetical Index
If the engine will not start .........................314
If your vehicle has to be stopped in an
emergency ................................................286
Ignition switch (engine switch) ............. 127
Overheating................................................. 322
Tachometer ..................................................... 66
Engine coolant Capacity ......................................................... 332
Checking .......................................................260
Preparing and checking before winter.........................................................................205
Engine coolant temperature gauge ....... 66
Engine immobilizer system ........................ 56
Engine oil Capacity .........................................................330
Checking .......................................................258
Preparing and checking before winter.........................................................................205
Warning light ............................................... 296
Engine oil maintenance data .................. 260
Engine oil pressure gauge ...........................74
Engine oil temperature gauge ...................74
Engine switch .................................................. 127 Auto power off function .......................... 130
Changing the engine switch modes.. 129
If your vehicle has to be stopped in an
emergency ................................................286
EPS (Electric Power Steering) ................201 Warning light ............................................... 297
Event data recorder (EDR) ............................6
F
First-aid kit storage belt ............................ 229
Flat tire Tire pressure warning system .............268
Vehicles with a spare tire ...................... 307
Floor mats ...........................................................22
Fluid Automatic transmission .......................... 333
Brake.................................................... 262, 334
Washer ........................................................... 264
Footwell light ................................................. 225 Front passenger occupant classification
system .............................................................. 36
Front position lights Wattage ......................................................... 338
Front seats Adjustment ....................................................... 99
Cleaning .........................................................245
Correct driving posture ............................ 23
Driving position memory ........................ 102
Head restraints............................................. 105
Memory recall function............................ 104
Power easy access system .................... 102
Seat heaters .................................................. 223
Seat position memory .............................. 102
Seat ventilators ............................................ 223
Front side marker light Light switch .....................................................142
Front turn signal lights Replacing light bulbs ................................282
Turn signal lever .......................................... 136
Wattage ......................................................... 338
Fuel Capacity ........................................................ 330
Fuel gauge ........................................................ 66
Fuel pump shut off system..................... 294
Information ....................................................339
Refueling.......................................................... 155
Type ................................................................. 330
Warning light ...............................................299
Fuel consumption Average fuel economy .............................. 73
Current fuel consumption ........................ 73
Fuel filler door If the fuel filler do or cannot be opened
........................................................................... 316
Refueling.......................................................... 155
Fuel gauge ......................................................... 66
Fuel pump shut off system........................ 294
Fuses ................................................................. 278
G
Garage door opener ................................. 232

389Alphabetical Index
Gauges ............................................................... 66
Gear Position....................................................75
G-force................................................................74
Glove box ........................................................227
Glove box light ............................................. 228
H
Head restraints .............................................. 105
Headlight aim ................................................280
HeadlightsAutomatic High Beam system.............. 144
Light switch ..................................................... 142
Replacing light bulbs................................ 282
Wattage..........................................................338
Heated steering wheel .............................. 223
Heaters Automatic air conditioning system .....215
Heated steering wheel............................ 223
Outside rear view mirrors ...................... 219
Seat heaters .................................................. 223
High mounted stoplight Replacing light bulbs................................ 282
Hill-start assist control .................................201
Hood Open ............................................................... 255
Hooks Cargo hooks................................................ 229
Coat hooks ................................................... 230
Retaining hooks (floor mat)......................22
Horn ................................................................... 109
I
I/M test ............................................................ 252
Identification Engine ............................................................. 329
Vehicle ............................................................ 328
Ignition switch (engine switch)................. 127 Auto power off function .......................... 130
Changing the engine switch modes.. 129
If your vehicle has to be stopped in an
emergency ................................................286 Illuminated entry system ........................... 226
Indicators ........................................................... 64
Initialization
Items to initialize .......................................... 361
Maintenance.................................... 248, 260
Power windows ............................................. 112
Tire pressure warning system .............269
Inside rear view mirror ............................... 109
Instrument panel light co ntrol ..................... 71
Intercooler...................................................... 262
Intercooler coolant Capacity ......................................................... 332
Checking ...................................................... 260
Interior lights.................................................. 225 Front interior light ...................................... 225
Rear interior light........................................ 225
Intuitive parking assist Warning message ...................................... 187
J
JackPositioning a floor jack ............................255
Vehicle-equipped jack ...........................307
Jack handle .................................................... 307
Jam protection function Moon roof ........................................................ 115
Power windows ............................................. 112
K
Keyless entrySmart access system with push-button start ...................................................................95
Wireless remote control ...........................86
Keys Battery-saving function..............................96
Electronic key .................................................84
Engine switch ................................................. 127
If the electronic key does not operate properly .........................................................317
If you lose your keys .................................. 316
Key number plate .........................................84

393Alphabetical Index
Seats, FrontChild seats/child restraint system installa-tion .................................................................... 40
Sensor Automatic headlight system................... 142
Automatic High Beam system.............. 144
Inside rear view mirror............................... 110
LDA (Lane Departure Alert with steering control) ..........................................................169
Radar sensor................................................. 158
Rain-sensing windshield wipers...........153
Service reminder message ..................... 248
Shift lever Automatic transmission ............................. 131
Side airbags ...................................................... 28
Side marker lights Light switch ..................................................... 142
Replacing light bulbs................................ 282
Side mirrors Adjustment....................................................... 110
BSM (Blind Spot Monitor) ...................... 191
Folding ................................................................. 111
Linked mirror function when reversing111
Mirror position memory...........................102
RCTA function ............................................... 191
Side turn signal lights Replacing light bulbs................................ 282
Turn signal lever ...........................................136
Wattage..........................................................338
Side windows ................................................... 112
Smart access system with push-button startAntenna location........................................... 95
Entry functions................................................88
Starting the engine ...................................... 127
Warning message.....................................303
Snow mode ......................................................133
Snow tires ....................................................... 205
Spare tire......................................................... 307 Storage location ......................................... 307
Spark plug ...................................................... 332
Specifications ................................................ 328 Speed indicator ............................................... 68
Speed meter
Speed indicator..............................................68
Speedometer ................................................... 66
Steering lock Column lock release .................................. 127
Steering lock system warning message............................................................................ 127
Steering wheel Adjustment ..................................................... 108
Heated steering wheel ............................ 223
Meter control switches .............................. 72
Power easy access system .................... 102
Steering wheel position memory........ 102
Stop lights Replacing light bulbs ................................282
Wattage ......................................................... 338
Storage features ...........................................227
Stuck If the vehicle becomes stuck ................326
Sun visors ..........................................................231
Sunshade Roof...................................................................... 115
Switch ASC (Active Sound Control) dial........ 141
Meter control switches .............................. 72
Switches Activating the Automatic High Beam144
Automatic High Beam system ..............144
Brake Hold switch...................................... 139
Door lock switches ......................................90
Driving mode select switch ................... 199
Driving position memory switches .... 102
Emergency flashers switch .................. 286
Engine switch ................................................. 127
Garage door opener switches........... 232
Heated steering wheel switch ............. 223
Ignition switch ................................................ 127
Instrument panel light control switches71
Light switches ................................................142
Moon roof switches..................................... 114
“ODO TRIP” switch .................................... 70