key Lexus IS250 2015 Workshop Manual

5008-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
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
customization 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.
Starting the engine
1
2
3
4

5018-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
■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. 4 3 9 )
■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 with push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features →P. 5 3 7 )
●Check if battery-saving mode is set. If it is set, cancel the function. (→P. 1 1 5 )
CAUTION
■When using the mechanical key and operating the power windows and moon roof
Operate the power window or moon roof after checking to make sure that there is no
possibility of any passenger having any of their body parts caught in the window or
moon roof.
Also, do not allow children to operate the mech anical key. It is possible for children and
other passengers to get caught in power window and moon roof.
3

5048-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
■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.

5399-2. Customization
9
Vehicle specifications
IS350/250_U (OM53C50U)
*1: For details about each function: →P. 8 8
*2: The default setting varies according to country.
*3:Except F SPORT models
*4: Some status screens cannot be registered (indicated on multi-information display).
*5: 2 of the following items: current fuel consumption, average fuel economy (after reset),
average fuel economy (after refuel), average fuel economy (after start), average vehi-
cle speed (after reset), average vehicle speed (after start), distance (driving range),
distance (after start), elapsed time (after reset), elapsed time (after start), blank.
*6:F SPORT models
■Door lock ( →P. 103, 109, 499)
REV indicator*65000 rpm
2000 to 6600
rpm
—O—
OFF
REV peak*6ONOFF—O—
Function*1Default settingCustomized setting123
FunctionDefault settingCustomized setting
Unlocking using a mechani-
cal key
Driver’s door
unlocked in one
step, all doors
unlocked in two steps
All doors unlocked in one step——O
Automatic door lockShifting the shift
lever to position
other than P
Off
O—OVehicle speed is
approximately 12
mph (20 km/h) or higher
Automatic door unlockShifting the shift
lever to POff
O—ODriver’s door is opened
Locking/unlocking of the
trunk when all doors are
locked/unlockedOnOff——O
123

5419-2. Customization
9
Vehicle specifications
IS350/250_U (OM53C50U)
■Driving position memory* (→ P. 1 2 3 )
*: If equipped
■Po w e r w i n d o w s ( →P. 1 3 8 )
■Moon roof* (→ P. 141)
*: If equipped
FunctionDefault settingCustomized setting
Driver’s seat movement
when exiting the vehicleStandardOffO—OPar t i a l
Doors linked to the driving
position memory recall
functionDriver’s doorAll doors——O
123
FunctionDefault settingCustomized setting
Mechanical key linked oper-
ationOffOn——O
Wireless remote control
linked operationOffOn (Open only)——O
123
FunctionDefault settingCustomized setting
Mechanical key linked oper-
ationOffOn——O
Linked operation of compo-
nents when mechanical key
is used (open only)
Slide onlyTilt only——O
Wireless remote control
linked operationOffOn (Open only)——O
Linked operation of compo-
nents when wireless remote
control is used
Slide onlyTilt only——O
123

5449-2. Customization
IS350/250_U (OM53C50U)
■Illumination ( →P. 3 6 8 )
■Seat belt reminder ( →P. 4 6 7 )
FunctionDefault settingCustomized setting
Ti m e e l a p s e d b e f o r e t h e
interior lights turn off15 seconds
Off
O—O7. 5 s e c o n d s
30 seconds
Operation after the engine
switch is turned offOnOff——O
Operation when the doors
are unlockedOnOff——O
Operation when you
approach the vehicle with
the electronic key on your
person
OnOff——O
Inside door handle lightsOnOff——O
Ti m e e l a p s e d b e f o r e t h e
outer foot lights turn off15 seconds
Off
O—O7. 5 s e c o n d s
30 seconds
Operation of the outer foot
lights when you approach
the vehicle with the elec-
tronic key on your person
OnOff——O
Operation of the outer foot
lights when the doors are
unlocked with the power
door lock switch
OnOff——O
123
FunctionDefault settingCustomized setting
Vehicle speed linked seat
belt reminder buzzerOnOff——O
123

560
IS350/250_U (OM53C50U)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. 1 0 0 )
●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 3 9 )
●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. 116)
●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 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. 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

561What to do if... (Troubleshooting)
IS350/250_U (OM53C50U)
●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. 5 0 0 )
●Is the battery discharged? ( →P. 5 0 2 )
●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 9 8 )
●It is locked automatically to prevent theft of the vehicle. ( →P. 161)
●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 8 )
●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. 161)
If you think something is wrong
The engine does not start
The shift lever cannot be shifted fr om 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

562What to do if... (Troubleshooting)
IS350/250_U (OM53C50U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( →P. 4 6 7 )
●The parking brake indicator is on
Is the parking brake released? ( →P. 1 7 2 )
Depending on the situation, other type s of warning buzzer may also sound.
( → P. 4 6 6 , 4 7 2 )

●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( →P. 7 1 )
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside th e vehicle or the moon roof opened?
Check the message on the multi-information display. ( →P. 4 7 2 )
●When a warning light turns on or a warning message is displayed, refer to
P. 466, 472. A warning buzzer sounds during driving
An alarm is activate
d and the horn sounds
A warning buzzer sounds wh en leaving the vehicle
A warning light turns on or a warning message is displayed

567Alphabetical index
IS350/250_U (OM53C50U)
Child safety ................................................ 53Airbag precautions .............................. 39
Battery precautions ...............421, 505
Child restraint system ......................... 54
How your child should wear the seat belt .......................................... 32
Installing child restraints.................... 58
Moon roof precautions.................... 144
Power window lock switch ............ 138
Power window precautions .......... 140
Rear door child-protectors ........... 106
Removed electronic key battery precautions.............. 440
Seat belt extender
precautions ...........................................35
Seat belt precautions .......................... 57
Seat heater precautions................. 366
Trunk precautions................................. 112
Child-protectors.................................... 106 Cleaning ....................................... 396, 399
Aluminum wheels .............................. 397
Exterior ...................................................396
Interior ..................................................... 399
Seat belts............................................... 400
Clock .......................................................... 377
Coat hooks ...............................................381
Compass ................................................. 387
Condenser ................................................418
Console box ............................................. 371
Cooling system ....................................... 417 Engine overheating ......................... 506
Cruise control Cruise control ....................................... 192
Dynamic radar crui se control .......196
Cup holders.............................................372
Current fuel consumption ....................87
Curtain shield airbags ............................ 37
Customizable features .......................537