key battery LEXUS RC300 2017 Owner's Manual

5898-2. Steps to take in an emergency
8
When trouble arises
OnceCon-
tinuous
An attempt was made to lock the
doors using the smart access system
with push-button start while the
electronic key was still inside the
vehicle.
→Retrieve the electronic key
from the vehicle and lock the
doors again.
An attempt was made to lock either
door by opening a door and putting
the inside lock bu tton into the lock
position, then closing the door with
the electronic key still inside the
vehicle.
→ Retrieve the electronic key
from the vehicle and lock the
doors again.
Once⎯
The electronic key has a low battery.
→Replace the electronic key bat-
tery. ( →P. 538)
Once⎯
The steering lock could not be
released within 3 seconds of the
engine switch being pressed.
→ Press the engine switch while
depressing the brake pedal and
moving the steering wheel left
and right.
Once⎯
Indicates a malfunction in the smart
access system with push-button
start
→Have the vehicle inspected by
your Lexus dealer.
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

6208-2. Steps to take in an emergency
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(→ P. 207)
●There may be a malfunction in th e engine immobilizer system. (→P. 79)
One of the following may be the cause of the problem:
●The battery may be discharged. ( →P. 626)
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletio n or a blown fuse. However, an interim
measure is available to start the engine. ( →P. 621)
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( →P. 207), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over

6228-2. Steps to take in an emergency
Use the mechanical key (→P. 137) in order to perfor m the following operations:
■Unlocking the door
Insert the mechanical key while
pulling on the driver’s door han-
dle.
Unlocking the door.
Remove the key, return the handle, and then pull the handle again.
If the electronic key does not operate properly
If communication between the electron ic key and vehicle is interrupted (→P.
154) or the electronic key cannot be us ed because the battery is depleted, the
smart access system with push-button st art and wireless remote control can-
not be used. In such cases, the doors and trunk can be opened and the engine
can be started by follow ing the procedure below.
Locking and unlocking the doors and opening the trunk
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2
3

6248-2. Steps to take in an emergency
Ensure that the shift lever is in P and depress the brake pedal.
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 cus-
tomization setting, the engine switch will
turn to ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
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.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( →P. 538)
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is pressed.
( → P. 208)
■When the electronic key does not work properly
●Make sure that the smart access system wi th push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features →P. 673)
●Check if battery-saving mode is set. If it is set, cancel the function. (→P. 154)
Starting the engine
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3
4
3

6268-2. Steps to take in an emergency
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.
Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depending on the situa-
tion, the alarm may activate and doors
locked. (
→P. 84)
Open the hood. ( →P. 497)
Remove the engine cover.
RC350/RC300
Raise the rear of the engine cover to
remove the rear clip, and then raise
the front of the engine cover to
remove the front clips.
RC F
Raise the front of the engine cover to
remove the front clips, and then raise
the rear of the engine cover to
remove the rear clips.
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call your Lexus deal er or a qualified repair shop.
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2
3

6288-2. Steps to take in an emergency
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximatel y 5 minutes to recharge the battery of
your vehicle.
Open and close any of the door of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once the vehicle’s engine has started, remove the jumper cables in the exact
reverse order from which they were connected.
Once the engine starts, have the vehicle inspected at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components 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 disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. 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 battery
●In some cases, it may not be possible to un lock 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 discharged.
Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery discharged, be
especially careful when reconnecting the battery.
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6
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8

698What 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. 138)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. (→ P. 140)
●Is the electronic key battery weak or depleted? ( →P. 538)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (→P. 208)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
(→ P. 154)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open th e trunk as usual. Take the key out from the trunk.
(→ P. 149)
If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The trunk lid is closed with the electronic key left inside

699What to do if... (Troubleshooting)
●Did you press the engine switch while firmly depressing the brake pedal?
(→ P. 207)
●Is the shift lever in P? ( →P. 210)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 152)
●Is the steering wheel unlocked? (→ P. 210)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 624)
●Is the battery discharged? ( →P. 626)
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode. ( →P. 218)
●It is locked automatically to prevent theft of the vehicle. ( →P. 210)
●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. 183)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( →P. 210)
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
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

704Alphabetical index
Back-up lightsReplacing light bulbs ....................... 549
Wattage ..................................................657
Battery........................................................ 513 Battery checking ................................. 513
If the vehicle battery is discharged.....................................626
Preparing and checking before winter ..................................................... 331
Warning light ...................................... 565
Blind Spot Monitor (BSM)..................313
Bluetooth
®
Audio system ...................................... 395
Hands-free system (for cellular phone) ........................397
Brake Fluid............................................................ 512
Parking brake......................................... 221
Warning light ...................................... 565
Brake assist ............................................. 298
Break-in tips..............................................193
Brightness control Instrument panel light control ........................................ 100, 107
BSM (Blind Spot Monitor)..................313 Card key .................................................... 136
Care............................................... 480, 485
Aluminum wheels ................................481
Exterior .................................................. 480
Interior .....................................................485
Seat belts................................................486
Cargo capacity ..................................... 204
Cargo hooks .......................................... 454
CD player................................................ 369
Chains ....................................................... 333
Child restraint system ........................... 58 Child seats definition .......................... 58
Child seats installation................. 65, 71
Front passenger occupant classification system........................... 51
Installing a CRS to the passenger seat ........................... 62
Installing a CRS to the rear seat ........................................................... 64
Installing CRS with LATCH anchors ......................72
Installing CRS with seat belts ......... 65
Installing CRS with top tether strap..........................76
BC

705Alphabetical index
Child safety ................................................ 57Airbag precautions .............................. 42
Battery precautions ............... 515, 629
Child restraint system ........................ 58
How your child should wear the seat belt .......................................... 36
Installing child restraints.................... 58
Moon roof precautions.................... 190
Power window lock switch ............ 183
Power window precautions .......... 186
Removed electronic key battery precautions.............. 539
Seat belt extender precautions ........................................... 39
Seat belt precautions ..........................38
Seat heater precautions..................445
Trunk precautions............................... 150 Cleaning ...................................... 480, 485
Aluminum wheels ................................481
Exterior .................................................. 480
Interior .....................................................485
Seat belts................................................486
Clock......................................................... 456
Coat hooks ............................................. 459
Compass ................................................. 468
Condenser................................................. 511
Console box ............................................452
Cooling system ..................................... 509 Engine overheating ..........................630
Cruise control Cruise control ..................................... 245
Dynamic radar cruise control ..... 249
Cup holders............................................ 453
Current fuel consumption ........... 112, 119
Curtain shield airbags ........................... 40
Customizable features .......................673