Page 66 of 628

661-1. For safe use
IS300h_EE(OM53B95E)
(1) For the child restraint system which do not carry the ISO/XX size
class identification (A to G), for the applicable mass group, the car
manufacturer shall indicate the vehicle specific ISOFIX child
restraint system(s) recommended for each position.
Key of letters inserted in the above table:
IUF: Suitable for ISOFIX forward-facing child restraint systems of uni-
versal category approved for use in this mass group.
IL1: Suitable for “LEXUS MINI” (0 to 13 kg [0 to 28 lb.]) approved for
the use in this mass group.
IL2: Suitable for “LEXUS MIDI” (0 to 18 kg [0 to 39 lb.]) approved for
the use in this mass group.
When using a “LEXUS MINI” or “LEXUS MIDI”, adjust the support leg
and the ISOFIX connectors as follows:
Lock the support leg where 4th
hole can be seen. (“LEXUS
MIDI” rear-facing, “LEXUS
MINI”)
Lock the support leg where 6th
hole can be seen. (“LEXUS
MIDI” forward-facing only)
Lock the ISOFIX connectors
where numbers 4 and 5 can be
seen.
IL3: Refer to the “HTS iZi Kid X3” user manual for fitment method.
X: ISOFIX position not suitable for ISOFIX child restraint systems in
this mass group and/or this size class.
*: Remove the head restraint if it interferes with your child restraint system. Do
not sit on rear center seat when child restraint system is installed to rear left
seat.
The child restraint system mentioned in the table may not be available
outside of the EU area.
Other child restraint systems which are different from the systems men-
tioned in the table can be used, but the suitability of the systems must be
carefully checked with the child restraint system manufacturer and
retailer.
1
2
3
Page 91 of 628
90
IS300h_EE(OM53B95E)1-3. Theft deterrent system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operat-
ing.
The indicator light stops flashing
after the power switch has been
turned to ACCESSORY or ON
mode to indicate that the system has
been canceled.
System maintenance
The vehicle has a maintenance-free type immobilizer system.
Conditions that may cause the system to malfunction
If the grip portion of the key is in contact with a metallic object
If the key is in close proximity to or touching a key registered to the security
system (key with a built-in transponder chip) of another vehicle
Immobilizer system
The vehicle’s keys have built-in transponder chips that prevent the hybrid
system from starting if a key has not been previously registered in the
vehicle’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
Page 99 of 628
981-3. Theft deterrent system
IS300h_EE(OM53B95E)
Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
Alarm-operated door lock
In the following situations, the doors are locked automatically to prevent intrud-
ers:
The doors are unlocked manually without the mechanical key and the alarm is
triggered.
While the alarm is operating, the doors are unlocked manually without the
mechanical key.
The doors or trunk are unlocked using the
mechanical key.
A person inside the vehicle opens a door,
the trunk or hood, or unlocks the vehicle
using a inside lock button.
The 12-volt battery is recharged or
replaced when the vehicle is locked. (P.
552)
NOTICE
To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper oper-
ation of the system cannot be guaranteed.
Page 131 of 628
129
3
Operation of
each component
IS300h_EE(OM53B95E)
3-1. Key information
Keys .................................. 130
3-2. Opening, closing and
locking the doors and
trunk
Doors ................................ 136
Trunk................................. 143
Smart entry & start system 149
3-3. Adjusting the seats
Front seats ......................... 164
Rear seats .......................... 166
Driving position memory.. 168
Head restraints .................. 173
3-4. Adjusting the steering
wheel and mirrors
Steering wheel .................. 176
Inside rear view mirror ..... 178
Outside rear view mirrors . 180
3-5. Opening, closing the
windows and moon roof
Power windows................. 184
Moon roof ......................... 187
Page 132 of 628
130
IS300h_EE(OM53B95E)3-1. Key information
The following keys are provided with the vehicle.
Electronic keys
• Operating the smart entry & start
system (P. 149)
• Operating the wireless remote
control function
Mechanical keys
Key number plate
Card key (electronic key) (if
equipped)
Operating the smart entry & start
system (P. 149)
Locks the doors (P. 136)
Closes the windows and moon
roof
* (P. 136)
Unlocks the doors (P. 136)
Opens the windows and moon
roof
* (P. 136)
Opens the trunk (P. 144)
*: These settings must be customized at any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
Keys
The keys
1
2
3
4
Wireless remote control
1
2
3
4
5
Page 133 of 628
1313-1. Key information
3
Operation of each component
IS300h_EE(OM53B95E)
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 cyl-
inder, 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 func-
tion does not operate properly, you
will need the mechanical key. (P.
548)
Using the mechanical key
Page 134 of 628

1323-1. Key information
IS300h_EE(OM53B95E)
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 but-
ton using a pen tip etc. If it is still difficult to pull it out, use a coin etc.
When required to leave the vehicle’s key with a parking attendant
Set the luggage security system (P. 145) on and lock the glove box (P. 414)
as circumstances demand.
Remove the mechanical key for your own use and provide the attendant with the
electronic key only.
If you lose your mechanical keys
New genuine mechanical keys can be made by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional using the other
mechanical key and the key number stamped on your key number plate. Keep the
plate in a safe place such as your wallet, not in the vehicle.
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, reinstall
the battery with the positive terminal fac-
ing the Lexus emblem.
Page 135 of 628

1333-1. Key information
3
Operation of each component
IS300h_EE(OM53B95E)
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 accidentally. Pressing a button may cause the electronic key to emit radio
waves that could interfere with the operation of the aircraft.
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 when the hybrid
system is stopped. (P. 527)
As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery when
necessary. (P. 472)
• The smart entry & start system or the wireless remote control does not oper-
ate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
To avoid serious deterioration, do not leave the electronic key within 1 m (3 ft.)
of the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Table lamps
• Induction cookers
Replacing the battery
P. 472
Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask any
authorized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional for details.
If a wrong key is used
The key cylinder rotates freely to isolate inside mechanism.