Page 56 of 609
56
1-2. Opening, closing and locking the doors and trunk
IS250/220d/200d_EE
Operation signals
Doors: The emergency flashers flash to indicate that the doors have been
locked/unlocked. (Locked: Once; Unlocked: Twice)
Windows and moon roof: A buzzer sounds to indicate that the windows and
moon roof are operating.
Door lock buzzer
If a door is not fully closed, a buzzer sounds if an attempt to lock the door is
made. Fully close the door to stop the buzzer, and lock the vehicle once
more.
Alarm
Using the wireless remote control to lock the doors will set the alarm sys-
tem.
Electronic key battery depletion
P. 4 4
When the electronic key battery is fully depleted
P. 4 3 1
Security feature
P. 4 8
Conditions affecting operation
P. 4 2
Customization that can be configured at any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
Settings (e.g. trunk unlocking function) can be changed.
(Customizable features P. 556)
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70
1-3. Adjustable components (seats, mirrors, steering wheel)
IS250/220d/200d_EE
Canceling the linked door unlock operation
Turn the “ENGINE START STOP” switch OFF and close the
driver's door.
Using the wireless remote control: While pushing the “SET” but-
ton, press on the wireless remote control until the signal
beeps.
Using the door lock switch: While pressing the “SET” button, press
the lock or unlock side on the door lock switch until the signal
beeps.
Operating the driving position memory after turning the “ENGINE START
STOP” switch OFF
Memorized positions (except for the steering wheel position) can be acti-
vated up to 180 seconds after the driver’s door is opened and another 60 sec-
onds after it is closed again, even after turning the “ENGINE START
STOP” switch OFF.
To cancel seat position recall
Perform any of the following operations.
Push the “SET” button.
Push button “1”, “2” or “3”.
Adjust the seat using the switches (only cancels seat position recall).
If the battery is disconnected
The memorized positions are erased when the battery is disconnected.
CAUTION
Seat adjustment caution
Take care during seat adjustment that the seat does not strike the rear pas-
senger or squeeze your body against the steering wheel.
STEP1
STEP2
Page 101 of 609
94
1-5. Refueling
IS250/220d/200d_EE
Fuel types
Use of ethanol blended gasoline in a gasoline engine
Lexus allows the use of ethanol blended gasoline where the ethanol content
is up to 10%. Make sure that the ethanol blended gasoline to be used has a
Research Octane Number that follows the above.
Fuel tank capacity (reference)
65 L (17.2 gal., 14.3 Imp. gal.)
When the fuel filler door opener is inoperable
EngineTy p e
IS250
EU area:
Unleaded gasoline conforming to
European standard EN228, Research
Octane Number of 95 or higher
Except EU area:
Unleaded gasoline, Research Octane
Number of 95 or higher
IS220d and IS 200d
EU area:
Diesel fuel conforming to European
standard EN590
Except EU area:
Diesel fuel that contains 50 ppm or
less of sulfur and has a cetane number
of 48 or higher
The lever can be used to open the fuel
filler door if the fuel filler door cannot be
opened using the inside switch because
the battery is discharged or for any other
reason.
Page 112 of 609

104
1-6. Theft deterrent system
IS250/220d/200d_EE
Unexpected triggering of the alarm
In the following situations, perform an operation that will deactivate or stop
the alarm. (P. 102)
The battery is disconnected. (some models)
Alarm-operated door lock
When the alarm is operating, the doors are locked automatically to pre-
vent intruders.
Do not leave the key inside the vehicle when the alarm is operating, and
make sure the key is not inside the vehicle when recharging or replacing
the battery.
The doors or trunk are unlocked using
the mechanical key.
When someone without a key is left in
the vehicle and the doors are locked.
When a door, the trunk or hood is
opened from inside the vehicle, the
alarm may be triggered.
When the battery is recharged or
replaced, due to battery discharge and
so forth, after locking the doors.
(some models)
The alarm may be activated when the
hood is opened and the battery is recon-
nected after the mechanical key has
been used to unlock the doors.
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105
1-6. Theft deterrent system
1
Before driving
IS250/220d/200d_EE
Canceling the intrusion sensor
The alarm will be set even when the intrusion sensor is canceled.
To re-enable the intrusion sensor, press the “ENGINE START STOP”
switch or unlock the doors using the wireless remote door lock function
while the intrusion sensor is canceled.
Automatic re-enabling of the intrusion sensor
When the alarm system is set again, the intrusion sensor will also be set.
Intrusion sensor
The sensor may trigger the alarm in the following situations. Before locking
the doors, turn off the intrusion sensor. (P. 103)
Persons or pets are in the vehicle.
Unstable items, such as dangling accessories or clothes hanging on the
coat hooks, are in the vehicle.
The windows or moon roof are open.
The vehicle is parked in a place where extreme vibration or noises occur,
such as in a parking garage.
The vehicle is inside an automatic or high-pressure car wash.
The vehicle experiences impacts, such as hail, lightning strikes, or other
kinds of repeated impacts or vibrations.
Ice or snow is removed from the vehicle, causing the vehicle to receive
repeated impacts or vibrations.
The wind or something similar causes an externally mounted reflectively
coated windshield cover to move.
When the battery is disconnected
Be sure to deactivate the alarm system.
If the battery is disconnected before deactivating the alarm system, the
alarm may be triggered when the battery is reconnected.
When using the mechanical key to unlock the doors or trunk
Deactivate the alarm.
If the doors or trunk are unlocked using the mechanical key with the alarm
operational, the alarm will be triggered.
Page 168 of 609

159
2-1. Driving procedures
2
When driving
IS250/220d/200d_EE
If the engine does not start
The engine immobilizer system may not have been deactivated. (P. 9 6 )
When the steering lock cannot be released
When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by any
authorized Lexus dealer or repairer, or another duly qualified and equipped
professional, immediately.
Auto power off function
If the vehicle is left in ACCESSORY mode for more than an hour with the
shift lever in P (vehicles with an automatic transmission), the “ENGINE
START STOP” switch will automatically turn OFF.
Electronic key battery depletion
P. 4 4
When the electronic key battery is discharged
P. 4 3 1
Conditions affecting operation
P. 4 2
Note for the entry function
P. 4 6
The “ENGINE START STOP” switch
indicator will flash in green and a mes-
sage will be shown on the multi-informa-
tion display. Press the “ENGINE START
STOP” switch again while turning the
steering wheel left and right.
Page 169 of 609

160
2-1. Driving procedures
IS250/220d/200d_EE
CAUTION
When starting the engine
Always start the engine while sitting in the driver's seat. Do not press the
accelerator while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle,
push and hold the “ENGINE START STOP” switch for more than 3 sec-
onds.
However, do not touch the “ENGINE START STOP” switch while driving
except in an emergency. Turning the engine off while driving will not cause
loss of steering or braking control, but the power assist to these systems will
be lost. This will make it more difficult to steer and brake, so you should
pull over and stop the vehicle as soon as it is safe to do so.
NOTICE
To prevent battery discharge
Do not leave the “ENGINE START STOP” switch in ACCESSORY or
IGNITION ON mode for long periods without the engine running.
When starting the engine
Do not race a cold engine.
If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.
Page 201 of 609

189
2-3. Operating the lights and windshield wipers
2
When driving
IS250/220d/200d_EE
Automatic light off system
This system is active when the “ENGINE START STOP” switch is in IGNI-
TION ON mode and the headlight lever is in any position other than
.
When the light switch is in : The headlights turn off automatically
if the “ENGINE START STOP” switch is switched to ACCESSORY
mode or turned OFF.
When the light switch is in “AUTO”: The headlights and tail lights turn
off automatically if the “ENGINE START STOP” switch is switched to
ACCESSORY mode or turned OFF and the driver's door is opened.
Even if a door other than the driver's door is opened, the automatic light
off system will not operate.
To turn the lights on again, switch to IGNITION ON mode, or turn the light
switch off once and then back to
or .
Light reminder buzzer
A buzzer sounds when the “ENGINE START STOP” switch is turned OFF
or switched to ACCESSORY mode and the driver's door is opened while the
lights are turned on.
Automatic headlight leveling system (vehicles with discharge headlights)
The level of the headlights is automatically adjusted according to the num-
ber of passengers and the loading condition of the vehicle to ensure that the
headlights do not interfere with other road users.
Customization that can be configured at any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
Settings of the light sensor sensitivity can be changed.
(Customizable features P. 556)
NOTICE
To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not run-
ning.