key battery LEXUS RC300 2021 Owner's Manual

3067-2. Steps to take in an emergency
full-speed range
■If “Maintenance Required Soon” is dis-
played
Indicates that all maintenance according to
the driven distance on the maintenance
schedule
* should be performed soon.
Comes on approximately 4500 miles
(7200 km) after the message has been
reset. If necessary, perform maintenance.
Please reset the message after the mainte-
nance is performed. ( P.248)
*: Refer to the separa te “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■If “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all maintenance is required to
correspond to the driven distance on the
maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message ha s been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.248)
*: Refer to the separa te “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■If “Oil Maintenance Required Soon” is
displayed
Indicates that the engine oil is scheduled to
be changed. (The indicator will not work
properly unless the oil maintenance data
has been reset.)
Check the engine oil, and change if neces-
sary. After changing the engine oil, the oil
change system should be reset. ( P.260)
■If “Oil Maintenance Required” is dis-
played
Indicates that the engine oil should be
changed. (After the engine oil is changed
and the oil maintenance data has been
reset.) Check and change the en
gine oil, and oil fil-
ter by your Lexus dealer. After changing the
engine oil, the oil change system should be
reset. ( P.260)
■If a message that indicates the need for
visiting your Lexus dealer is displayed
The system or part shown on the
multi-information display is malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■If “See Owner’s Manual” is displayed
●If the following messages are shown, fol-
lowing the instruct ions, accordingly.
• “Engine Coolant Temp High” ( P.322)
●If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malfunction. Have the
vehicle inspected by your Lexus dealer
immediately.
• “Braking Power Low”
• “Access System with Elec. Key Malfunc-
tion”
●If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malfun ction. Immediately
stop the vehicle and contact your Lexus
dealer.
• “Oil Pressure Low”
• “Charging System Malfunction”
NOTICE
■“High Power Consumption Partial
Limit On AC/Heater Operation” is
frequently shown
There is a possible malfunction relating
to the charging system or the battery
may be deteriorating. Have the vehicle
inspected by your Lexus dealer.

3157-2. Steps to take in an emergency
7
When trouble arises
The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (P.315)
One of the following may be the cause
of the problem:
 One or both of the battery terminals
may be disconnected. ( P.263)
 The battery may be discharged.
( P.319)
 There may be a malfunction in the
steering lock system.
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally:
1 Set the parking brake.
2 Shift the shift lever to P.
3 Turn the engine switch to ACCES-
SORY mode. 4
Press and hold the engine switch
for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using
the above steps, the system may be
malfunctioning. Have the vehicle
inspected by your Lexus dealer.
The starter motor does not turn
over
The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.
Emergency start function

3177-2. Steps to take in an emergency
7
When trouble arises
■When the electronic key does not work
properly
●Make sure that the smart access system
with push-button start has not been deac-
tivated in the customization setting. If it is
off, turn the function on.
●Check if battery-saving mode is set. If it is
set, cancel the function. ( P.96)
■Unlocking the door
Use the mechanical key ( P.84) in
order to perform the following opera-
tions: 1
Insert the mechanical key while
pulling on the driver’s door handle.
2 Unlocking the door.
3 Remove the key, return the handle,
and then pull the handle again.
■Locking the door
1 Move the inside lock button to the
lock position.
2 Close the door.
■Opening the trunk
Turn the mechanical key clockwise to
open. ( P.57)
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.96) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors and trunk can be opened and
the engine can be started by follow-
ing the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key-related problems
Take your vehicle with all the electronic
keys provided with your vehicle, includ-
ing the card key, to your Lexus dealer.
Locking and unlocking the doors
and opening the trunk

3187-2. Steps to take in an emergency
■Key linked functions
1 Locks both side door
2 Closes the windows and moon roof (if
equipped) (turn and hold)
*
3Unlocks the door
Turning the key rearward unlocks the
driver’s door. Turning the key again unlocks
the other door.
4 Opens the windows and moon roof (if
equipped) (turn and hold)
*
*
: These settings must be customized at
your Lexus dealer.
1 Ensure that the shift lever is in P and
depress the brake pedal.
2 Touch the Lexus emblem side of the
electronic key to the engine switch.
When the electronic key is detected, a
buzzer sounds and the engine switch will
turn to IGNITION ON mode.
When the smart access system with
push-button start is deactivated in custom-
ization setting, the engine switch will turn
to ACCESSORY mode.
3 Firmly depress the brake pedal and
check that is shown on the
multi-information display.
4 Press the engine switch.
In the event that the engine still cannot
be started, contact your Lexus dealer.
■Stopping the engine
Shift the shift lever to P and press the engine
switch as you normally do when stopping
the engine.
■Electronic key battery
As the above procedure is a temporary
measure, it is recommended that the elec-
tronic key battery be replaced immediately
when the battery is depleted. ( P.277)
■Alarm (For Canada)
Using the mechanical ke y to lock the doors
will not set the alarm system.
If a door is unlocked using the mechanical
WARNING
■When using the mechanical key and
operating the power windows or
moon roof
Operate the power window or moon
roof after checking to make sure that
there is no possibilit y of any passenger
having any of their body parts caught in
the window or moon roof.
Also, do not allow ch ildren to operate the
mechanical key. It is possible for children
and other passengers to get caught in
the power window or moon roof.
Starting the engine

3197-2. Steps to take in an emergency
7
When trouble arises
key when the alarm system is set, the alarm
may be triggered.
■Changing engine switch modes
Release the brake pedal and press the
engine switch in step 3 above.
The engine does not start and modes will be
changed each time the switch is pressed.
(  P.129)
If you have a set of jumper (or booster)
cables and a second vehicle with a
12-volt battery, you can jump start your
vehicle by following the steps below.
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( P.58)
2 Open the hood. ( P.255)
3 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
 RC350/RC300 AWD
If the vehicle battery is dis-
charged
The following procedures may be
used to start the engine if the vehi-
cle’s battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the engine
A
B
C
D

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.

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

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

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