2015 LEXUS RC350 key battery

5958-2. Steps to take in an emergency
8
When trouble arises
RC350/RCF_U (OM24636U)
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 discharge gradually even when the vehicle is not
in use, due to natural discharg e and the draining 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
●Make sure that the key is not inside the vehicle when recharging or replacing the bat-
tery. The key may be locked in the vehicle if the alarm is activated. ( P. 7 9 )
●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 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.
7

660
RC350/RCF_U (OM24636U)What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne
w genuine mechanical keys can be made
by your Lexus dealer. ( P. 1 3 2 )
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 1 3 4 )
●Is the electronic key battery weak or depleted? ( P. 5 0 7 )
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 1 9 4 )
●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. 1 4 8 )
●The function to prevent the electronic ke y from being left inside the trunk will
operate and you can open the trunk as usual. Take the key out from the trunk.
( P. 1 4 3 )
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 doors cannot be locked or unlocked
The trunk lid is closed with the electronic key left inside

661What to do if... (Troubleshooting)
RC350/RCF_U (OM24636U)
●Did you press the engine switch while firmly depressing the brake pedal?
(P. 1 9 3 )
●Is the shift lever in P? ( P. 1 9 6 )
●Is the electronic key anywhere detectable inside the vehicle? ( P. 1 4 6 )
●Is the steering wheel unlocked? ( P. 1 9 6 )
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (P. 5 9 2 )
●Is the battery discharged? ( P. 5 9 3 )
●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. 5 8 9 )
●It is locked automatically to prevent theft of the vehicle. ( P. 1 9 6 )
●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. 171)
●The auto power off function will be oper ated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( P. 1 9 6 )
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

666Alphabetical index
RC350/RCF_U (OM24636U)
Back-up lightsReplacing light bulbs ......................... 518
Wattage ................................................... 619
Battery....................................................... 487 Battery checking ................................487
If the vehicle battery is discharged.................................... 593
Preparing and checking before winter ..................................................... 315
Warning light ...................................... 533
Blind Spot Monitor (BSM)................ 297
Bluetooth
®
Audio system .......................................376
Hands-free system (for cellular phone) ........................378
Brake Fluid.......................................................... 486
Parking brake...................................... 205
Warning light ...................................... 533
Brake assist ............................................. 282
Break-in tips............................................... 181
Brightness control Instrument panel light control ............................................ 94, 101
BSM (Blind Spot Monitor)................ 297 Card key ....................................................130
Care................................................458, 463
Aluminum wheels .............................. 459
Exterior ...................................................458
Interior ..................................................... 463
Seat belts................................................ 464
Cargo capacity .......................................190
Cargo hooks ...........................................434
CD player................................................ 352
Chains ......................................................... 316
Child restraint system ............................ 57 Child seats definition .......................... 57
Child seats installation............... 64, 70
Front passenger occupant classification system......................... 50
Installing a CRS to the passenger seat ............................. 61
Installing a CRS to the rear seat ........................................................... 63
Installing CRS with LATCH anchors ....................... 71
Installing CRS with seat belts ......... 64
Installing CRS with top tether strap..........................73
BC

667Alphabetical index
RC350/RCF_U (OM24636U)
Child safety ................................................ 56Airbag precautions .............................. 42
Battery precautions .............489, 596
Child restraint system ......................... 57
How your child should wear the seat belt .......................................... 36
Installing child restraints..................... 57
Moon roof precautions.................... 178
Power window lock switch .............. 171
Power window precautions ...........174
Removed electronic key battery precautions.............. 508
Seat belt extender precautions ........................................... 39
Seat belt precautions ..........................38
Seat heater precautions..................425
Trunk precautions............................... 144 Cleaning .......................................458, 463
Aluminum wheels .............................. 459
Exterior ...................................................458
Interior ..................................................... 463
Seat belts................................................ 464
Clock......................................................... 436
Coat hooks ............................................. 439
Compass .................................................. 447
Condenser.............................................. 485
Console box ............................................432
Cooling system ..................................... 484 Engine overheating .......................... 597
Cruise control Cruise control ..................................... 229
Dynamic radar cruise control ..... 233
Cup holders............................................ 433
Current fuel consumption ........ 106, 107
Curtain shield airbags ........................... 40
Customizable features ...................... 635

669Alphabetical index
RC350/RCF_U (OM24636U)
E-mail......................................................... 386
Eco drive mode ..................................... 278
Eco Driving Indicator............................. 88
Eco Driving Indicator Light ....... 107, 119
Eco driving meter .................................... 96
EDR (Event data recorder) ...................10
Elapsed time .................................. 106, 107
Electric Power Steering (EPS) ....... 283Warning light .......................................534
Electronic key ......................................... 130 Battery-saving function .................... 148
If the electronic key does not operate properly............................ 590
Replacing the battery ...................... 507 Emergency flashers .............................522
Emergency tire puncture
repair kit.................................................574
Emergency, in case of If a warning buzzer sounds ................................................. 533
If a warning light turns on .............. 533
If a warning message is displayed ........................................539
If the electronic key does not operate properly ....... 590
If the engine will not start ............... 587
If the shift lever cannot be shifted from P ........... 589
If the vehicle battery is discharged.........................................593
If you have a flat tire ............. 560, 574
If you think something is wrong ................................................531
If your vehicle becomes stuck..................................................... 600
If your vehicle has to be stopped in an emergency.......... 523
If your vehicle needs to be towed ....................................... 524
If your vehicle overheats ................ 597
E

672Alphabetical index
RC350/RCF_U (OM24636U)
I/M test ......................................................472
IdentificationEngine ..................................................... 606
Vehicle ................................................... 605
Ignition switch (engine switch)..........193
Illuminated entry system .................... 430
Immobilizer system..................................76
Indicators .................................................... 85
Initialization Maintenance......................................... 467
Meter.................................................107, 119
Moon roof ...............................................176
Multi-information display ........107, 119
Power windows .................................... 172
Tire pressure warning system................................492
Initiators (tire pressure warning system)................................. 498
Inside rear view mirror .........................166
Instrument panel light control...............................................94, 101
Interior lights........................................... 429
Intuitive parking assist......................... 254
Jack Positioning a floor jack .................... 476
Vehicle-equipped jack ...... 560, 574
Jack handle ..................................560, 574
Jam protection function Front seats .............................................. 153
Moon roof ...............................................176
Power windows .................................... 172 Keyless entry
Smart access system with push-button start........... 135, 141
Wireless remote control......... 135, 141
Keys .............................................................130 Battery-saving function ....................148
Electronic key ....................................... 130
Engine switch ........................................193
If the electronic key does not operate properly ....... 590
Key number plate ............................... 130
Keyless entry ......................................... 130
Mechanical key.......................................131
Replacing the battery ...................... 507
Warning buzzer...................................136
Wireless remote control................. 130
Knee airbags ............................................. 40
I
J
K

676Alphabetical index
RC350/RCF_U (OM24636U)
Radar cruise control (dynamic radar cruise control) ........................ 233
Radiator .................................................... 485
Radio.......................................................... 346
Rear seats ................................................. 155 Fold down the seatback .................. 155
Luggage security system .................142
Rear turn signal lights ......................... 204 Replacing light bulbs ......................... 516
Turn signal lever .................................204
Wattage ................................................... 619
Rear view mirror Inside rear view mirror ..................... 166
Outside rear view mirrors .............. 168 Rear window defoggers .................... 420
Refueling...................................................225
Capacity................................................. 607
Fuel types............................................... 607
If the fuel filler door cannot be opened ..........................227
Opening the fuel tank cap .............227
Remote Touch
*
Replacing Electronic key battery ..................... 507
Fuses ....................................................... 509
Light bulbs............................................... 512
Tires ......................................................... 560
Reporting safety defects for U.S. owners .................................. 648
Resetting the message indicating maintenance is required ................. 467
Rev indicator ..................................... 92, 99
Rev peak ........................................... 92, 100
R