Page 65 of 648

651-1. For safe use
1
For safety and security
IS350/300/200t_U (OM53D76U)
WARNING
■When installing a booster seat 
To prevent the belt from going into ALR lock mode, do not fully extend the shoulder
belt. ALR mode causes the belt to tighten only. This could cause injury or discomfort to
the child. (→P. 32)
■When installing a child restraint system
Follow the directions given in the child rest raint system installation manual and fix the
child restraint system securely in place.
If the child restraint system is  not correctly fixed in place, the child or other passengers
may be seriously injured or ev en killed in the event of a sudden braking or an accident.
●If the driver’s seat interferes with the child
restraint system and prevents it from being
attached correctly, attach the child restraint
system to the right-hand rear seat.
●Adjust the front passenger seat so that it does
not interfere with the child restraint system.
●Only put a forward-faci ng child restraint sys-
tem on the front seat when unavoidable.
When installing a forward-facing child
restraint system on the front passenger seat,
move the seat as far back as possible even if
the “AIR BAG OFF” indicator light is illumi-
nated. Failure to do so may result in death or
serious injury if the airbags deploy (inflate). 
         
        
        
     
        
        Page 66 of 648

661-1. For safe use
IS350/300/200t_U (OM53D76U)
WARNING
■When installing a child restraint system
●When using the LATCH anchors for a child restraint system, move the seat as far
back as possible, with the seatback  close to the child restraint system.
●When a booster seat is installed, always en sure that the shoulder belt is positioned
across the center of the child’s shoulder. The  belt should be kept away from the child’s
neck, but not so that it could fall off the ch ild’s shoulder. Failing to do so may result in
death or serious injury in the event of sudden braking, sudden swerving or an acci-
dent.
●Ensure that the belt and plate are securely  locked and the seat belt is not twisted.
●Shake the child restraint system left and right, and forward and backward to ensure
that it has been securely installed.
●After securing a child  restraint system, never adjust the seat.
●Follow all installation instructions provided  by the child restraint system manufacturer.
●When securing some types of child restraint systems in rear seats, it may not be possi-
ble to properly use the seat belts in positions next to the child restraint without inter-
fering with it or affecting seat belt effectiveness. Be sure  your seat belt fits snugly
across your shoulder and low on your hips. If it  does not, or if it interferes with the child
restraint, move to a different position. Failure to do so ma y result in death or serious
injury.
■Do not use a seat belt extender
If a seat belt extender is used when insta lling a child restraint system, the seat belt will
not securely hold the child restraint system , which could cause death or serious injury
to the child or other passengers in the event of a sudden braking, sudden swerving or
an accident.
■To correctly attach a child re straint system to the anchors
When using the LATCH anchors, be sure that  there are no foreign objects around the
anchors and that the seat belt is not caught  behind the child restraint system. Make sure
the child restraint system is securely attached , or it may cause death or serious injury to
the child or other passengers in the event of a sudden braking, sudden swerve or an
accident. 
         
        
        
     
        
        Page 114 of 648

1143-2. Opening, closing and locking the doors and trunk
IS350/300/200t_U (OM53D76U)
The door cannot be opened from inside
the vehicle when the lock is set. Unlock
Lock
These locks can be set to prevent chil-
dren from opening the rear doors. Push
down on each rear door switch to lock
both rear doors. 
The following functions can be set or canceled:
For instructions on custom izing, refer to P. 602.
Rear door child-protector lock
1
2
Automatic door locking and unlocking systems
FunctionOperation
Speed linked door locking function
All doors are automatically locked when
vehicle speed is approximately 12 mph
(20 km/h) or higher.
Shift position linked door locking function
All doors are automatically locked when
shifting the shift lever to position other
than P.
Shift position linked door unlocking func-
tionAll doors are automatically unlocked
when shifting the shift lever to P.
Driver's door linked  door unlocking func-
tionAll doors are automatically unlocked
when driver’s door is opened. 
         
        
        
     
        
        Page 116 of 648

1163-2. Opening, closing and locking the doors and trunk
IS350/300/200t_U (OM53D76U)
■Impact detection door lock release system
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.
■Using the mechanical key
The doors can also be locked and unlocked with the mechanical key. ( →P. 559)
■Conditions affecting the oper ation of the smart access system with push-button start
or wireless remote control
→ P. 124
■Customization
Settings (e.g. unlocking function  using a key) can be changed. 
(Customizable features:  →P. 602)
WARNING
■To prevent an accident
Observe the following precautions while driving the vehicle.
Failure to do so may result in a door open ing and an occupant being thrown out of the
vehicle, resulting in death or serious injury.
●Ensure that all doors are properly closed and locked.
●Do not pull the inside handle of the doors while driving. 
Be especially careful with the front doors, as the doors may be opened even if the
inside lock buttons are in locked position.
●Set the rear door child-protector locks when  children are seated in the rear seats.  
         
        
        
     
        
        Page 120 of 648
1203-2. Opening, closing and locking the doors and trunk
IS350/300/200t_U (OM53D76U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■Before driving
●Make sure that the trunk lid is  fully closed. If the trunk lid is not fully closed, it may
open unexpectedly while driv ing and hit near-by objects or luggage in the trunk may
be thrown out, causing an accident.
●Do not allow children to play in the trunk.
If a child is accidentally locked in the trun k, they could suffer from heat exhaustion,
suffocation or other injuries.
●Do not allow a child to open or close the trunk lid.
Doing so may cause the trunk lid to open unexpectedly, or cause the child’s hands,
head, or neck to be caught by the closing trunk lid.
■Important points while driving
Never let anyone sit in the trunk. In the even t of sudden braking or a collision, they are
susceptible to death or serious injury.  
         
        
        
     
        
        Page 133 of 648
1333-3. Adjusting the seats
3
Operation of each component
IS350/300/200t_U (OM53D76U)
WARNING
Observe the following precautions. Failure to do so may result in death or serious injury.
■When folding the rear seatbacks down
●Do not fold the seatbacks down while driving.
●Stop the vehicle on level ground, set the pa rking brake and shift the shift lever to P.
●Do not allow anyone to sit on a folded seatback or in the  trunk while driving.
●Do not allow children to enter the trunk.
■After returning the rear seatback to the upright position
●Check that the seat belts are not twisted or caught in the seatback.
●Make sure that the seatback is securely
locked in position by lightly pushing it back
and forth. 
If the seatback is not securely locked, the red
marking will be visible on the seatback lock
release knob. Make sure that the red marking
is not visible. 
         
        
        
     
        
        Page 149 of 648
149
3
Operation of each component
IS350/300/200t_U (OM53D76U)3-5. Opening, closing the windows and moon roof
The power windows can be opened and closed using the switches.
Operating the switch move
s the windows as follows:
Closing
One-touch closing
*
Opening
One-touch opening
*
*
: To stop the window partway, operate the switch in the op posite direction.
Press the switch to lock the passenger
window switches.
The indicator will come on.
Use this switch to prevent children from
accidentally opening or closing a pas-
senger window.
Power windows
Opening and closing procedures
1
2
3
4
Window lock switch
Indicator 
         
        
        
     
        
        Page 152 of 648

1523-5. Opening, closing the windows and moon roof
IS350/300/200t_U (OM53D76U)
WARNING
Observe the following precautions. 
Failure to do so may result in death or serious injury.
■Closing the windows
●The driver is responsible for all the power window operations, including the operation
for the passengers. In order to prevent acci dental operation, especially by a child, do
not let a child operate the power windows. It  is possible for children and other passen-
gers to have body parts caught in the powe r window. Also, when riding with a child, it
is recommended to use the window lock switch. ( →P. 149)
●Check to make sure that all passengers do not have any part  of their body in a posi-
tion where it could be caught wh en a window is being operated.
●When exiting the vehicle, turn the engine sw itch off, carry the key and exit the vehicle
along with the child. There may be accidental operation, due to mischief, etc., that
may possibly lead to an accident.
■Jam protection function
●Never use any part of your body to intentionally activate the jam protection function.
●The jam protection function may not work if  something gets jammed just before the
window is fully closed. Be careful not to get any part of your body jammed in the win-
dow.
■Catch protection function
●Never use any part of your body or clothing to intentionally activate the catch protec-
tion function.
●The catch protection function may not work  if something gets caught just before the
window is fully opened. Be ca reful not to get any part of your body or clothing caught
in the window.