2014 Lexus IS250 key battery

4898-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53758U)
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 immediatel y when the battery is depleted. (P. 4 2 7 )
■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. 1 6 0 )
■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 custom ization setting. If it is off, turn the function on.
(Customizable features P. 5 2 5 )
●Check if battery-saving mo de is set. If it is set, cancel the function. ( P. 115)
Starting the engine
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2
3
4
3

4928-2. Steps to take in an emergency
IS350/250_U (OM53758U)
■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 discharge 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 2 )
●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.

548
IS350/250_U (OM53758U)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. 100)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 1 0 2 )
●Is the electronic key battery weak or depleted? ( P. 4 2 7 )
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 1 6 0 )
●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 1 6 )
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( P. 1 0 6 )
●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. 111)
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 rear door cannot be opened
The trunk lid is closed with the electronic key left inside

549What to do if... (Troubleshooting)
IS350/250_U (OM53758U)
●Did you press the engine switch while firmly depressing the brake pedal?
(P. 1 5 9 )
●Is the shift lever in P? ( P. 161)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 1 1 4 )
●Is the steering wheel unlocked? ( P. 161)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (P. 4 8 9 )
●Is the battery discharged? ( P. 4 9 0 )
●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. 4 8 7 )
●It is locked automatically to prevent theft of the vehicle. ( P. 1 6 1 )
●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. 1 3 7 )
●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. 161)
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

555Alphabetical index
IS350/250_U (OM53758U)
Child safety ................................................ 53Airbag precautions .............................. 39
Battery precautions ............. 409, 493
Child restraint system ......................... 54
How your child should wear the seat belt .......................................... 32
Installing child restraints.................... 58
Moon roof precautions.................... 143
Power window lock switch .............137
Power window precautions .......... 139
Rear door child-protectors ........... 106
Removed electronic key battery precautions...............428
Seat belt extender precautions ........................................... 35
Seat belt precautions .......................... 57
Seat heater precautions..................354
Trunk precautions................................. 112
Child-protectors.................................... 106 Cleaning .......................................384, 387
Aluminum wheels ..............................384
Exterior ...................................................384
Interior ..................................................... 387
Seat belts............................................... 388
Clock......................................................... 365
Coat hooks ............................................. 369
Compass ..................................................375
Condenser.............................................. 406
Console box ........................................... 359
Cooling system ..................................... 405 Engine overheating .......................... 494
Cruise control Cruise control ....................................... 192
Dynamic radar cruise control .......196
Cup holders............................................ 360
Current fuel consumption ....................87
Curtain shield airbags ............................ 37
Customizable features ...................... 525

557Alphabetical index
IS350/250_U (OM53758U)
E-mail...........................................................319
Eco drive mode .......................................231
Eco Driving Indicator............................. 90
Eco Driving Indicator Light ................. 88
EDR (Event data recorder) ...................10
Elapsed time .............................................. 87
Electric Power Steering (EPS) ....... 235Function ..................................................235
Warning light ...................................... 455
Electronic key ........................................... 98 Battery-saving function ...................... 115
If the electronic key does not operate properly............................ 488
Replacing the battery ....................... 427 Emergency, in case of
If the electronic key does not operate properly ....... 488
If the engine will not start ...............485
If the shift lever cannot be shifted from P ............ 487
If the vehicle battery is discharged.........................................490
If the warning buzzer sounds .................................................455
If the warning light turns on ..........455
If the warning message is displayed ..........................................461
If you have a flat tire .......................... 475
If you think something is wrong .............................................. 453
If your vehicle becomes stuck...................................................... 497
If your vehicle has to be stopped in an emergency.......... 447
If your vehicle needs to be towed ....................................... 448
If your vehicle overheats ................ 494
E

560Alphabetical index
IS350/250_U (OM53758U)
I/M test ..................................................... 396
IdentificationEngine ....................................................... 501
Vehicle ..................................................... 501
Ignition switch (engine switch)......... 159
Illuminated entry system .................... 357
Immobilizer system................................. 69
Indicators .................................................... 78
Initialization Maintenance.......................................... 391
Moon roof ...............................................142
Multi-information display ................. 88
Power windows ................................... 138
Tire pressure warning system..................................412
Initiators (tire pressure warning system).................................. 418
Inside door handle lights ................... 356
Inside rear view mirror .........................132
Instrument panel light control ............ 84
Interior lights........................................... 357 Wattage ................................................. 509
Intuitive parking assist........................... 214
Jack Positioning a floor jack ................... 400
Vehicle-equipped jack ................... 476
Jack handle .................................................. 476
Jam protection function Moon roof ................................................ 141
Power windows ................................... 138 Keyless entry
Smart access system with push-button start.........103, 109
Wireless remote control.......103, 109
Keys .............................................................. 98 Battery-saving function ..................... 115
Electronic key ......................................... 98
Engine switch ........................................159
If the electronic key does not operate properly ....... 488
Key number plate ................................. 98
Keyless entry ........................................... 98
Mechanical key...................................... 99
Replacing the battery .......................427
Warning buzzer...................................104
Wireless remote control................... 98
Knee airbags ..............................................36
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K

564Alphabetical index
IS350/250_U (OM53758U)
Radar cruise control (dynamic radar cruise control) ..........................196
Radiator .................................................... 406
Radio........................................................... 281
Rear personal lights............................. 357 Wattage ................................................. 509
Rear seats ................................................... 121 Fold down the seatback .................... 121
Luggage security system .................. 110
Rear sunshade ....................................... 367 Operation ..............................................367
Reverse operation feature.............367
Rear turn signal lights ...........................170 Replacing light bulbs ........................439
Turn signal lever .................................. 170
Wattage ................................................. 509
Rear view mirror Inside rear view mirror ......................132
Outside rear view mirrors .............. 134 Rear view monitor system .................. 221
Rear window defoggers .................... 350
Refueling................................................... 188
Capacity.................................................502
Fuel types...............................................502
If the fuel filler door cannot be opened .......................... 190
Opening the fuel tank cap ............. 190
Remote Touch
*
Replacing Electronic key battery ......................427
Fuses ........................................................ 429
Light bulbs............................................. 432
Tires .......................................................... 475
Reporting safety defects for U.S. owners .................................. 536
Reset the maintenance data .............. 391
Rev indicator ............................................. 88
Rev peak ..................................................... 88
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