stop start Lexus IS F 2012 Specifications / 2012 ISF OWNERS MANUAL QUICK GUIDE (OM53A51U)
Page 7 of 78
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Keys
■Electronic key
Smart access system with push-button start
( P. 8 ,  1 2 )
*: Canada only
■ Mechanical key
● Locks and unlocks the doors
● Opens the trunk
● Locks and unlocks the glove box
The mechanical key is stored inside the electronic
key. To extract the key, release the latch and pull,
or if equipped with a card key, press the button
and pull.
■ Wireless remote control
Press:  locks all doors
Press once: unlocks the driver's door
Press twice:  unlocks all doors
Press and hold:  opens the trunk
Press and hold:  sounds the alarm
(Use the alarm to attract attention to the vehi-
cle in order to help deter break-ins. To stop the
alarm, press any button on the wireless remote
control.)
Card key*
1
2
3
4 
Page 9 of 78
9
Theft Deterrent System
■Engine immobilizer system
The engine immobilizer system prevents the
engine from being started in the event that an
attempt is made to start the vehicle using an
unregistered key. 
The security indicator light  flashes to indicate that
the system is set.
■ Alarm
The system sounds the alarm and flashes the lights when forcible entry is detected.
To set the alarm:  close the doors, trunk and hood, and lo ck all doors. The security indicator
light comes on to indicate that the alarm is in  its preparation state. When the indicator light
begins to flash, the system is armed.
To deactivate or stop the alarm:  turn the “ENGINE START STOP” switch to ACCESSORY
or IGNITION ON mode or start the en gine, or unlock the doors or trunk.
■Steering lock
The steering wheel locks when the “ENGINE
START STOP” switch is turned OFF and the
driver’s door is opened.
When the steering lock cannot be released, the
green indicator light on the “ENGINE START
STOP” switch will flash and a message will be
shown on the multi-information display. To release
it, gently turn the wheel left or right while pressing
the “ENGINE START STOP” switch.
The theft deterrent system includes the followi ng features to help protect your vehicle from
theft. 
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12
Engine (Ignition) Switch
■Starting the engine
Make sure the parking brake is set and the shift
lever is in P.
Depress the brake pedal.The “ENGINE START STOP” switch indi-
cator light turns green.
Press the “ENGINE START STOP” switch.
■ Stopping the engine
 Set the parking brake and shift the shift lever to P.
 Press the “ENGINE START STOP” switch.
■Changing “ENGINE START STOP” switch modes
To change the “ENGINE START STOP” switch mode without turning on the engine, press
the “ENGINE START STOP” switch without depressing the brake pedal. The mode can be
changed in the following order:
With the electronic key on your person, the engine can be started by simply pressing the
“ENGINE START STOP” switch while depressing the brake pedal.
(The mechanical key cannot be used to start the engine.)
ACCESSORY mode IGNITION ON mode
(Indicator light: amber)
OFF 
(Indicator light: off) 
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13
Automatic Transmission
■Shift positions
P Pa r k
R Reverse
N Neutral (drive not engaged)
D Drive
M M mode
The vehicle can only be shifted out of P when the “ENGINE START STOP” switch is in
IGNITION ON mode and the brake pedal is
depressed. 
Page 16 of 78
16
F-Sport Mode Total Control Switch/
SNOW Mode Switch 
 Snow modeFor starting or accelerating on snow-covered
roads or other slippery surfaces.
  “Sport” mode
Various driving controls are adjusted,
enabling sporty driving.
An indicator comes on in the meter cluster
when in “Sport” or snow mode.
The following modes can be selected to suit driving conditions or your preference.
1
2
To cancel the mode, press the same switch again. When the “ENGINE START STOP”
switch is turned OFF, the mode is automatically deactivated. 
Page 71 of 78
What to do if ...
71
If the electronic key does not operate 
properly
■Unlocking and locking the doors
To unlock or lock the vehicle, use the mechanical
key to remove the lock cover on the driver's door
handle. The mechanical ke y is stored inside the
electronic key.
Unlocks
Locks
■Starting the engine
Depress the brake pedal.
Touch the Lexus emblem side of the electronic
key to the “ENGINE START STOP” switch.
Press the “ENGINE START STOP” switch
within 10 seconds of the buzzer, keeping the
brake pedal depressed.
To change “ENGINE START STOP” switch
modes, release the brake pedal and press the
“ENGINE START STOP” switch within 10 sec-
onds of the buzzer.
1
2
If the electronic key battery becomes depleted , replace it with a new battery. For instruc-
tions on replacing the ba ttery, refer to the Owner's Manual.  If you need further assistance,
contact your Lexus dealer. 
Page 72 of 78
72
If the engine doesn't start
Make sure that the correct operating procedures have been followed.Make sure that the brake pedal is firmly
depressed when attempting to start the engine. 
( P.1 2 )
Make sure that the steering wheel lock is
released.
To release it, press the “ENGINE START STOP”
switch while gently turn ing the wheel left and
right. ( P.9 )
Brake pedal
Steering wheel lock
If the engine still does not st art, see the Owner's Manual fo r more information or contact
your Lexus dealer. 
Page 73 of 78
What to do if ...
73
Electronic Key Alarm
The electronic key alarm uses an alarm and warning messages to indicate that the electronic 
key has been used improperly. Take appropriate measures in response to any warning mes-
sages that are displayed. In  some cases, an alarm may sound without an accompanying 
warning message. If so, follow the correction procedure in the table below.
AlarmSituationCorrection procedure
Exterior alarm sounds 
once for 2 seconds
Tried to lock the doors 
using the entry function 
while the electronic key is 
still inside the passenger 
compartment.Retrieve the electronic key 
from the passenger com-
partment and lock the 
doors again.
Closed the trunk while the 
electronic key is still inside 
and all doors are locked.Retrieve the electronic key 
from the trunk and close 
the trunk lid.
Exterior alarm sounds 
once for 60 seconds
Tried to exit the vehicle 
with the electronic key and 
lock the doors without first 
turning the “ENGINE 
START STOP” switch OFF.
Turn the “ENGINE START 
STOP” switch OFF and 
lock the doors again.
Exterior alarm sounds 
once for 10 secondsTried to lock the vehicle 
using the entry function 
while a door is open.Close all of the doors and 
lock the doors again.
Interior alarm sounds 
continuouslyTried to open the door and 
exit the vehicle without 
shifting the shift lever to P.
Shift the shift lever to P.
Interior alarm pings 
continuously
Switched to ACCES-
SORY mode while the 
driver's door is open. 
(Opened the driver's door 
when the “ENGINE 
START STOP” switch is in 
ACCESSORY mode.)
Close the driver's door.
Tu r n e d  t h e  “ E N G I N E  
START STOP” switch OFF 
while the driver's door is 
open.
Close the driver's door. 
Page 76 of 78
76
ItemFunctionDefault settingCustomized setting
Windshield 
wipers and 
washer
Switching operation when the 
vehicle is stationaryOnOff
Drip prevention functionOnOff
Time elapsed before the drip 
prevention function operates
Va r i a b l e  
depending on  the vehicle  speed
3 seconds
Intuitive parking 
assist
Back sensor operation display 
and buzzerOnOff
Buzzer volumeLevel 3Level 1 to 5
Distance which a sensor detects4.9 ft. (150 cm)2.0 ft. (60 cm)
Illumination
Time elapsed before lights turn 
off15 seconds7. 5  s e c o n d s
30 seconds
Operation when the doors are 
unlockedOnOff
Operation after the “ENGINE 
START STOP” switch is turned 
OFF
OnOff
Front footwell lightsOnOff
Shift lever lightOnOff
Outer foot lightsOnOff
Seat belt 
reminderVehicle speed linked seat belt 
reminder buzzerOnOff