2021 LEXUS IS300 alarm

2TABLE OF CONTENTS
For your information ......................................5
Reading this manual ....................................... 9
How to search ............................................... 10
Pictorial index .................................................. 11
1-1. For safe use Before driving .................................... 22
For safe driving.................................. 23
Seat belts ............................................. 24
SRS airbags ....................................... 28
Front passenger occupant classifi- cation system ................................. 36
Exhaust gas precautions .............. 40
1-2. Child safety Riding with children.......................... 41
Child restraint systems ................... 41
1-3. Lexus Enform Lexus Enform Safety Connect .. 54
1-4. Theft deterrent system Engine immobilizer system ......... 60
Alarm..................................................... 62
Theft prevention labels ................. 63
2-1. Instrument cluster Warning lights and indicators .... 66
Gauges and meters ......................... 71
Multi-information display............. 76
Fuel consumption information ... 833-1. Key information
Keys ...................................................... 88
3-2. Opening, closing and locking the doors and trunk
Doors .................................................... 92
Trunk ..................................................... 96
Smart access system with push-but- ton start ............................................. 99
3-3. Adjusting the seats Front seats........................................ 106
Rear seats......................................... 107
Driving position memory ........... 108
Head restraints ................................. 111
3-4. Adjusting the steering wheel and mirrors
Steering wheel ................................. 113
Inside rear view mirror ................. 114
Outside rear view mirrors........... 116
3-5. Opening, closing the windows and moon roof
Power windows .............................. 118
Moon roof ........................................ 120
4-1. Before driving Driving the vehicle......................... 124
Cargo and luggage...................... 130
Vehicle load limits.......................... 132
Trailer towing................................... 132
Dinghy towing ................................ 133
4-2. Driving procedures Engine (ignitio n) switch ............... 134
1For safety and security
2Vehicle status information and
indicators
3Before driving
4Driving

21
1
1
For safety and security
For safety and security
.1-1. For safe useBefore driving ................................. 22
For safe driving.............................. 23
Seat belts .......................................... 24
SRS airbags .................................... 28
Front passenger occupant classifi- cation system .............................. 36
Exhaust gas precautions ........... 40
1-2. Child safety Riding with children....................... 41
Child restraint systems ................ 41
1-3. Lexus Enform Lexus Enform Safety Connect........................................................... 54
1-4. Theft deterrent system Engine immobilizer system ...... 60
Alarm................................................. 62
Theft prevention labels .............. 63

621-4. Theft deterrent system
■Items to check before locking the
vehicle
To prevent unexpected triggering of
the alarm and vehicle theft, make sure
of the following:
 Nobody is in the vehicle.
 The windows and moon roof (if
equipped) are closed before the
alarm is set.
 No valuables or other personal
items are left in the vehicle.
■Setting
Close the doors, trunk and hood, and
lock all the doors. The system will be
set automatically after 30 seconds.
The indicator light changes from being on
to flashing when the system is set.
■Deactivating or stopping
Do one of the following to deactivate
or stop the alarm:
 Unlock the doors.
 Open the trunk.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine. (The alarm will be
deactivated or stopped after a few
seconds.)
■System maintenance
The vehicle has a maintenance-free type
alarm system.
■Triggering of the alarm
The alarm may be triggered in the following
situations:
(Stopping the alarm deactivates the alarm
system.)
●A person inside the vehicle opens a door
or the trunk or hood, or unlocks the vehi-
cle.
●The battery is recharged or replaced
when the vehicle is locked. ( P.363)
Alarm
The alarm uses light and sound to
give an alert when an intrusion is
detected.
The alarm is triggered in the follow-
ing situations when the alarm is set:
 A locked door or trunk is
unlocked or opened in any way
other than using the entry func-
tion, wireless remote control or
mechanical key. (The doors will
lock again automatically.)
 The hood is opened.
Setting/deactivating/stopping
the alarm system

631-4. Theft deterrent system
1
For safety and security
■Alarm-operated door lock
In the following cases, depending on the sit-
uation, the door may automatically lock to
prevent improper entry into the vehicle:
●When a person remaining in the vehicle
unlocks the door and the alarm is acti-
vated.
●While the alarm is activated, a person
remaining in the vehicle unlocks the door.
●When recharging or replacing the bat-
tery
NOTICE
■To ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.
Theft prevention labels
(U.S.A.)
These labels are attached to the
vehicle to reduce vehicle theft by
facilitating the tracing and recov-
ery of parts from stolen vehicles.
Do not remove under penalty of
law.

883-1. Key information
3-1.Key information
The following keys are provided with
the vehicle.
Electronic keys
• Operating the smart access system with push-button start ( P.99)
• Operating the wireless remote control function ( P.90)
Mechanical keys
Key number plate
Card key (electronic key) (if
equipped)
Operating the smart access system with
push-button start ( P.99)
■Card key (if equipped)
●The card key is not waterproof.
●The mechanical key that is stored inside
the card key should be used only if a
problem arises, such as when the card key does not operate properly.
●If it is difficult to take out the mechanical
key, push down the lock release button
using a pen tip etc. If it is still difficult to
pull it out, use a coin etc.
●To store the mechanical key in the card
key, insert it while pressing the lock
release button.
●If the battery cover is not installed and the
battery falls out or if the battery was
removed because the key got wet, rein-
stall the battery with the positive terminal
facing the Lexus emblem.
■When riding in an aircraft
When bringing an electronic key onto an
aircraft, make sure you do not press any
buttons on the electronic key while inside
the aircraft cabin. If you are carrying an
electronic key in your bag etc., ensure that
the buttons are not likely to be pressed acci-
dentally. Pressing a button may cause the
electronic key to emit radio waves that
could interfere with the operation of the air-
craft.
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
(The card key battery life is about a year
and a half.)
●If the battery becomes low, an alarm will
sound in the cabin and a message will be
shown on the multi-information display
when the engine is stopped.
Keys
The keys
A
B
C
D

903-1. Key information
Locks the doors (P.92)
Unlocks the doors ( P.92)
Opens the windows and moon
roof
* (  P.92)
Opens the trunk ( P.97)
Sounds the alarm
*: This setting must be customized at your Lexus dealer.
■Theft deterrent panic mode
When is pressed for longer than
about one second, an alarm will sound intermittently and the vehicle lights will flash
to deter any person from trying to break
into or damage your vehicle.
To stop the alarm, press any button on the
electronic key.
To take out the mechanical key, push
the release button and take the key out.
The mechanical key can
only be inserted in
one direction, as the key only has grooves
on one side. If the key cannot be inserted in
a lock cylinder, turn it over and re-attempt
to insert it.
After using the mechanical key, store it in
the electronic key. Carry the mechanical
key together with the electronic key. If the
electronic key battery is depleted or the
entry function does not operate properly,
you will need the mechanical key.
(  P.359)
NOTICE
●When installing the ba ttery, make sure
to check the direction of the battery.
Installing the battery in the wrong
direction may cause the battery to
deplete rapidly.
●The surface of the card key may be
damaged, or its coating may peel off in
the following situations:
• The card key is carried together with hard objects, such as coins and keys.
• The card key is scraped with a sharp object, such as the tip of a mechanical
pencil.
• The surface of the card key is wiped with thinner or benzene.
Wireless remote control
A
B
C
D
E
Using the mechanical key

933-2. Opening, closing and locking the doors and trunk
3
Before driving
To prevent unintended triggering of the
alarm, unlock the doors using the wireless
remote control and open and close a door
once after the settings have been changed.
(If a door is not opened within 60 seconds
after is pressed, the doors will be
locked again and the alarm will automati-
cally be set.)
In a case that the alarm is triggered, imme-
diately stop the alarm. (P.62)
■Impact detection door lock release sys-
tem
In the event that the vehicle is subject to a
strong impact, all the doors are unlocked.
Depending on the force of the impact or the
type of accident, however, the system may
not operate.
■Operation signals
A buzzer sounds and the emergency flash-
ers flash to indicate that the doors have
been locked/unlocked. (Locked: once;
Unlocked: twice)
A buzzer sounds to indicate that the win-
dows and moon roof are operating.
■Security feature
If a door is not opened within approximately
60 seconds after the vehicle is unlocked, the security feature automatically locks the
vehicle again.
■Welcome light illumination control
The front position, tail and license plate
lights automatically turn on at night when
the doors are unlocked using the entry
function or wireless remote control if the
light switch is in the “AUTO” position.
■When the doors cannot be locked by the
lock sensor on the upper part of the
door handle
If the door will not lock even when the top-
side sensor area is touched, try touching
both the topside and underside sensor
areas at the same time.
■Door lock buzzer
If an attempt to lock the doors is made when
a door is not fully closed, a buzzer sounds
continuously for 5 seconds. Fully close the
door to stop the buzzer, and lock the vehi-
cle once more.
■Setting the alarm
Locking the doors will set the alarm system.
(  P.62)
■Using the mechanical key
The doors can also be locked and unlocked
with the mechanical key. ( P.359)
■Conditions affecting the operation of
the smart access system with push-but-
ton start or wireless remote control
 P.100
■If the smart access system with
push-button start or the wireless remote
control does not operate properly
Use the mechanical key to lock and unlock
the doors. ( P.359)
Replace the key battery with a new one if it
is depleted. ( P.316)
Multi-information
display/BeepUnlocking function
Exterior: Beeps 3 times
Interior: Pings once
Holding the driver’s
door handle unlocks
only the driver’s
door.
Holding the front
passenger’s door
handle unlocks all
the doors.
Exterior: Beeps twice
Interior: Pings once
Holding either front
door handle unlocks
all the doors.

973-2. Opening, closing and locking the doors and trunk
3
Before driving
Press the trunk opener switch.
■Smart access system with
push-button start
While carrying the electronic key,
press the button on the trunk lid.
When all the doors are unlocked with the
power door lock system, the trunk can be
opened without carrying the electronic
key.
■Wireless remote control
Press and hold the switch. Using the trunk grip, lower the trunk
without applying force to the side and
push the trunk down from the outside
to close it.
■Trunk light
The trunk light turns on when the trunk is
opened.
■Function to prevent the trunk being
locked with the electronic key inside
●When all doors are locked, closing the
trunk lid with the electronic key left inside
the trunk will sound an alarm.
In this case, the trun k lid can be opened
pressing the trunk release button on the
trunk lid.
●If the spare electronic key is put in the
trunk with all the doors locked, the key
confinement prevention function is acti-
vated so the trunk can be opened. In
order to prevent theft, take all electronic
keys with you when leaving the vehicle.
●If the electronic key is put in the trunk with
all the doors locked, the key may not be
Opening the trunk from inside
the vehicle
Opening the trunk from outside
the vehicle
When closing the trunk