battery LEXUS RC300 2021 Workshop Manual

3217-2. Steps to take in an emergency
7
When trouble arises
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible.
■Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■To prevent battery discharge
●Turn off the headlights and the audio sys-
tem while the engine is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■Charging the battery
The electricity stored in the battery will dis-
charge gradually even when the vehicle is
not in use, due to natural discharge and the
draining effects of certain electrical appli-
ances. If the vehicle is left for a long time,
the battery may discharge, and the engine
may be unable to start. (The battery
recharges automatically during driving.)
■When recharging or replacing the bat-
tery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
battery is discharged. Use the wireless
remote control or the mechanical key to
lock or unlock the doors.
●The engine may not start on the first
attempt after the battery has recharged
but will start normally after the second
attempt. This is not a malfunction.
●The engine switch mode is memorized by
the vehicle. When the battery is recon-
nected, the system will return to the
mode it was in before the battery was dis-
charged. Before di sconnecting the bat-
tery, turn the engine switch off.
If you are unsure what mode the engine
switch was in befo re the battery dis-
charged, be especially careful when
reconnecting the battery.
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the bat-
tery:
●Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentionally in contact with
any other than the intended terminal.
●Do not allow the other end of the
jumper cable connected to the “+” ter-
minal to come into contact with any
other parts or meta l surfaces in the
area, such as brackets or unpainted
metal.
●Do not allow the + and - clamps of the
jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette
lighters or allow open flame near the
battery.
■Battery precautions
The battery contains poisonous and cor-
rosive acidic electrol yte, while related
parts contain lead and lead compounds.
Observe the following precautions when
handling the battery:
●When working with the battery, always
wear safety glasses and take care not
to allow any battery fluids (acid) to
come into contact with skin, clothing
or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your ha nds after handling
the battery support, terminals, and
other battery-related parts.

3227-2. Steps to take in an emergency
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2 If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled down
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.
 RC350/RC300 AWD
WARNING
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.66) is in the red zone
or a loss of engine power is expe-
rienced. (For example, the vehicle
speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures

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.

3468-1. Specifications
Maximum loaded vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that fol-
lows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim
by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight (Total load
capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s designated seating capacity
Vehicle maximum load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two
Vehicle normal load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight
(distributed in accor dance with Table 1
* below), and
dividing by two
Weather sideThe surface area of the rim not covered by the
inflated tire
Tire related termMeaning

3518-2. Customization
8
Vehicle specifications
8-2.Customization
■Changing by using the meter con-
trol switches
1 Press or to select .
2 Operate the switches to select a
desired item.
3 Change the setting by referring to
the message displayed on the
screen.
■Changing by using the Remote
Touch
1 Press the “MENU” button on the
Remote Touch.
2 Select “Setup” on the menu screen
and select “Vehicle”.
3 Select “Vehicle Customization”,
“LEXUS Park Assist” or “Drive
Mode Customization”. Various setting can be changed. Refer
to the list of settings that can be
changed for details.
For details on the Remote Touch, refer
to the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S MAN-
UAL”.
■When customizing using the Remote
Touch
Stop the vehicle in a safe place, apply the
parking brake, and shift the shift lever to P.
Also, to prevent battery discharge, leave
the engine running while customizing the
features.
Some function settings are changed simultaneously with other functions being cus-
tomized. Contact your Lexus dealer for further details.
Settings that can be changed using the Remote Touch
Settings that can be changed using the meter control switches
Settings that can be changed by your Lexus dealer
Customizable features
Your vehicle includes a variety of
electronic features that can be per-
sonalized to your preferences. The
settings of these features can be
changed by using the meter control
switches, the Remote Touch or at
your Lexus dealer.
Customizing vehicle features
WARNING
■During customization
As the engine needs to be running
during customization, ensure that the
vehicle is parked in a place with ade-
quate ventilation. In a closed area such as
a garage, exhaust gases including harm-
ful carbon monoxide (CO) may collect
and enter the vehicle. This may lead to
death or a serious health hazard.
NOTICE
■During customization
To prevent battery discharge, ensure that
the engine is running while customizing
features.
Customizable features
A
B
C

3618-3. Items to initialize
8
Vehicle specifications
8-3.Items to initialize
Items to initialize
The following items must be initialized for normal system operation after such
cases as the battery being reconnected, or maintenance being performed on
the vehicle:
List of items to initialize
ItemWhen to initializeReference
Message indicating
maintenance is
required
After the maintenance is performedP.248
Engine oil mainte-
nance dataAfter changing the engine oilP.260
Tire pressure warning
system
• When rotating the tires
• When changing the tire inflation pres- sure by changing traveling speed or
load weight, etc.
P.270

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

385Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ............................... 275
Automatic air conditioning system .....215
Micro dust and pollen filter..................... 219
ABS (Anti-lock Brake System)................201 Warning light ............................................... 297
Active Sound Control (ASC) ................... 141
Adaptive Variable Suspension System 201
Air conditioning filter ................................. 275
Air conditioning system Air conditioning filter ............................... 275
Automatic air conditioning system .....215
Micro dust and pollen filter..................... 219
Airbags Airbag operating conditions................... 30
Airbag precautions for your child .........32
Correct driving posture .............................23
Curtain shield airbag operating condi-tions .................................................................. 30
Curtain shield airbag precautions ........32
Front passenger occupant classification system ............................................................. 36
General airbag precautions ....................32
Locations of airbags.................................... 28
Modification and disposal of airbags . 35
Side airbag operating conditions ......... 30
Side airbag precautions .............................32
Side and curtain shield airbags operating conditions...................................................... 30
Side and curtain shield airbags precau- tions ...................................................................32
SRS airbags ..................................................... 28
SRS warning light ...................................... 296
Alarm ....................................................................57 Warning buzzer ......................................... 295
Anchor brackets .......................................41, 49
Antennas (smart access system with push-button start)........................................ 95
Anti-lock Brake System (ABS)................201 Warning light ............................................... 297 Approach warning......................................... 181
ASC (Active Sound Control) ................... 141
Assist grips ..................................................... 230
Audio system-linked display .......................76
Automatic air conditioning system ........215
Automatic headlight leveling system ....143
Automatic High Beam ................................144
Automatic light control system................ 142
Automatic transmission ............................... 131
M mode ............................................................134
Paddle shift switches ....................... 133, 134
Snow mode.................................................... 133
Average fuel economy..................................73
Average vehicle speed .................................73
B
Back-up light Replacing light bulbs ................................282
Wattage ......................................................... 338
Battery Battery checking ........................................263
If the battery is discharged ..................... 319
Preparing and checking before winter......................................................................... 205
Warning light ...............................................296
Blind Spot Monitor (BSM).......................... 191
Boost gauge.......................................................74
Brake Brake hold ...................................................... 139
Fluid...................................................................334
Parking brake ................................................137
Warning light ...............................................295
Brake assist ......................................................201
Break-in tips...................................................... 119
Brightness control Instrument panel light control................... 71
BSM (Blind Spot Monitor).......................... 191
C
Card key ............................................................ 84

386Alphabetical Index
CareExterior ........................................................... 242
Interior ............................................................. 245
Seat belts........................................................ 245
Wheels and wheel ornaments............ 242
Cargo capacity...............................................125
Cargo hooks ................................................. 229
Center Display ............................................... 212
Chains .............................................................. 206
Child restraint system Child seats definition................................... 40
Child seats installation........................ 44, 47
Front passenger occupant classification system ............................................................. 36
Installing a CRS to the front passenger seat ....................................................................42
Installing CRS with LATCH anchors . 48
Installing CRS with top tether strap.....50
Riding with children ..................................... 40
Types of child restraint system installation method ............................................................. 41
Using an anchor bracket .......................... 49
Child safety Airbag precautions.......................................32
Battery precautions ........................ 264, 321
Child restraint system.......................... 40, 41
Heated steering wheel or seat heater precautions................................................ 223
How your child should wear the seat belt ............................................................................ 25
Installing child restraints ............................ 40
Moon roof precautions ............................. 116
Power window lock switch...................... 113
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 40
Trunk precautions .......................................... 91
Cleaning Exterior ........................................................... 242
Interior ............................................................. 245
Radar sensor................................................. 158
Seat belts........................................................ 245
Wheels and wheel ornaments............ 242 Clock ........................................................66, 230
Clock settings ............................................... 230
Coat hooks..................................................... 230
Compass ......................................................... 237
Condenser ..................................................... 262
Console box .................................................. 228
Consumption screen .....................................79
Cooling system............................................. 260
Engine overheating................................... 322
Cornering lights .............................................143 Replacing light bulbs ................................282
Cruise control Dynamic radar cruise control with full-speed range ........................................176
Cup holders ................................................... 228
Current fuel consumption ...........................73
Curtain shield airbags .................................. 28
Customizable features ................................351
D
Daytime running light system ................... 142
Daytime running lights Replacing light bulbs ................................282
Defogger Outside rear view mirrors.......................219
Rear window ..................................................219
Windshield ......................................................219
Differential Front differential oil............. .......................333
Rear differential oil......... ..................... .......333
Dimension ...................................................... 328
Dinghy towing.................................................126
Display Center Display .............................................. 212
Drive information .......................................... 73
LDA (Lane Departure Alert with steering control) ........................................................... 171
Multi-information display ............................ 71
Warning messages.................................. 305
Distance until next engine oil change .... 70
Do-it-yourself maintenance .................... 249
Door courtesy lights ................................... 225

387Alphabetical Index
Door lockDoors..................................................................88
Smart access system with push-button start ................................................................... 95
Wireless remote control........................... 86
Doors Automatic door lock ing and unlocking
system ............................................................. 90
Door glasses ....................................................112
Door lock..........................................................88
Open door warning buzzer .........89, 90, 299
Open door warning light ...................... 299
Outside rear view mirrors ....................... 110
Drive distance ...................................................73
Drive info 1/Drive info 2/Drive info 3.....73
Drive information ............................................73
Driver’s seat position memory Driving position memory.........................102
Memory recall function ........................... 104
Power easy access system .....................102
Drive-start control ......................................... 119
Driving Break-in tips .................................................... 119
Correct driving posture .............................23
Driving mode select switch ....................199
Procedures ...................................................... 118
Winter drive tips.........................................205
Driving assist system information display ..............................................................................76
Driving information display .........................73
Driving position memory............................102 Memory recall function ........................... 104
Power easy access system .....................102
Driving range ....................................................73
DRS (Dynamic Rear Steering) ................201
Dynamic radar cruise control Warning message.....................................303
Dynamic radar cruise control with full-speed range .......................................... 176Warning message...................................... 183
Dynamic Rear Steering (DRS) ................201E
Eco Driving Indicator.....................................74
Eco Driving Indicator Light .........................74
EDR (Event data recorder) ............................6
Elapsed time ......................................................73
Electric Power Steering (EPS) ................201 Warning light ............................................... 297
Electronic key .................................................. 84 Battery-saving function..............................96
If the electronic key does not operate properly .........................................................317
Replacing the battery ............................... 277
Emergency flashers .................................... 286
Emergency, in case of If a warning buzzer sounds...................295
If a warning light turns on.......................295
If a warning message is displayed .... 303
If the battery is discharged ..................... 319
If the electronic key does not operate properly .........................................................317
If the engine will not start..........................314
If the fuel filler do or cannot be opened
........................................................................... 316
If the vehicle is trapped in rising water .......................................................................... 287
If you have a flat tire ..................................307
If you lose your keys .................................. 316
If you think something is wrong..........293
If your vehicle becomes stuck .............326
If your vehicle has to be stopped in an emergency ................................................ 286
If your vehicle needs to be towed .... 289
If your vehicle overheats ........................ 322
Engine ACCESSORY mode................................129
Compartment.............................................. 257
Engine switch ................................................. 127
Fuel pump shut off system..................... 294
Hood ................................................................255
How to start the engine ............................ 127
Identification number ...............................329