2017 LEXUS RC350 key battery

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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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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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

707Alphabetical index
E-mail......................................................... 405
Eco drive mode ..................................... 294
Eco Driving Indicator............................. 94
Eco Driving Indicator Light ....... 114, 126
Eco driving meter .................................. 102
EDR (Event data recorder) ...................10
Elapsed time ......................................112, 119
Electric Power Steering (EPS) ....... 299Warning light ...................................... 566
Electronic key ..........................................136 Battery-saving function .................... 154
If the electronic key does not operate properly............................. 622
Replacing the battery ...................... 538 Emergency flashers ............................ 554
Emergency tire puncture
repair kit................................................ 606
Emergency, in case of If a warning buzzer sounds ..........565
If a warning light turns on ..............565
If a warning message is displayed .......................................... 571
If the electronic key does not operate properly ........ 622
If the engine will not start ............... 620
If the vehicle battery is discharged......................................... 626
If you have a flat tire ............. 592, 606
If you think something is wrong ..............................................563
If your vehicle becomes stuck..... 636
If your vehicle has to be stopped in an emergency..........555
If your vehicle needs to be towed .......................................556
If your vehicle overheats ................630
E

711Alphabetical index
JackPositioning a floor jack ................... 498
Vehicle-equipped jack ...... 592, 606
Jack handle ................................. 592, 606
Jam protection function Front seats .............................................. 165
Moon roof ..............................................188
Power windows ................................... 184 Keyless entry
Smart access system with push-button start............141, 147
Wireless remote control..........141, 147
Keys ............................................................. 136 Battery-saving function ....................154
Electronic key ........................................136
Engine switch ...................................... 207
If the electronic key does not operate properly ........ 622
Key number plate ................................136
Keyless entry ..........................................136
Mechanical key..................................... 137
Replacing the battery ......................538
Warning buzzer................................... 142
Wireless remote control..................136
Knee airbags ............................................. 40
JK
*: For vehicles with a naviga tion system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.