Page 66 of 573

661-1. For safe use
IS350/250_U (OM53758U)
CAUTION
■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. 3 2 )
■When installing a child restraint system
Follow the directions given in the child restra int system installation manual and fix the
child restraint system securely in place.
If the child restraint system is not correctl y fixed in place, the child or other passengers
may be seriously injured or even killed in th e 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-facing 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 68 of 573

681-1. For safe use
IS350/250_U (OM53758U)
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhaled.
CAUTION
Exhaust gases include harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard.
■Important points while driving
●Keep the trunk lid closed.
●If you smell exhaust gases in the vehicle ev en when the trunk lid is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible.
■When parking
●If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
engine.
●Do not leave the vehicle with the engine on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior.
●Do not leave the engine running in an area with snow build-up, or where it is snowing.
If snowbanks build up around the vehicle wh ile the engine is running, exhaust gases
may collect and enter the vehicle.
■Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.
Page 70 of 573
69
1
For safety and security
IS350/250_U (OM53758U)1-2. Theft deterrent system
The indicator light flashes after the
engine switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the engine switch has been turned to
ACCESSORY or IGNITION ON
mode to indicate that the system has
been canceled.
■System maintenance
The vehicle has a maintenance-free type engine 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
Engine immobilizer system
The vehicle’s keys have built-in transponder chips that prevent the engine
from starting if a key has not been prev iously registered in the vehicle’s on-
board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
Page 72 of 573
711-2. Theft deterrent system
1
For safety and security
IS350/250_U (OM53758U)
The alarm uses light and sound to give an alert when an intrusion is detected.
The alarm is triggered in the following situations when the alarm is set:
●A locked door or trunk is unlocked or opened in any way other than using the
entry function, wireless remote control or mechanical key. (The doors will lock
again automatically.)
●The hood is opened.
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.
Do one of the following to de activate or stop the alarms:
●Unlock the doors or open the trunk.
●Turn the engine switch to ACCESSORY or IGNITION ON mode, or start
the engine. (The alarm will be deactivat ed or stopped after a few seconds.)
Alarm
The alarm
Setting the alarm system
Deactivating or stopping the alarm
Page 76 of 573
75
Instrument cluster2
IS350/250_U (OM53758U)
2. Instrument clusterWarning lights and indicators ........................................ 76
Gauges and meters ...................... 81
Multi-information display .......... 86
Fuel consumption information ................................... 92
Page 77 of 573
76
IS350/250_U (OM53758U)2. Instrument cluster
Except F SPORT models
F SPORT models
The units used on the meters and some indicators may differ depending on the target
region.
Warning lights and indicators
The warning lights and indicators on th
e instrument cluster and center panel
inform the driver of the status of the vehicle’s various systems.
For the purpose of explanation, the foll owing illustrations display all warning
lights and indicators illuminated.
Page 78 of 573
772. Instrument cluster
2
Instrument cluster
IS350/250_U (OM53758U)
Warning lights inform the driver of malfunctions in the indicated vehicle systems.
Warning lights
*1
(U.S.A.)
Brake system warning light
( P. 4 5 5 )
*1, 2
(if equipped)
Pre-collision system warn-
ing light
( P. 4 5 6 )
*1
(Canada)
Brake system warning light
( P. 4 5 5 )*1
Slip indicator ( P. 4 5 6 )
*1Charging system warning
light ( P. 4 5 5 )*1 Automatic headlight level-
ing system warning light
( P. 4 5 6 )
*1
(U.S.A.)
Malfunction indicator lamp
( P. 4 5 5 )*1Open door warning light
( P. 4 5 6 )
*1
(Canada)
Malfunction indicator lamp
( P. 4 5 5 )Low fuel level warning light
( P. 4 5 6 )
*1SRS warning light
( P. 4 5 5 )Seat belt reminder light
( P. 4 5 6 )
*1
(U.S.A.)
ABS warning light
( P. 4 5 5 )*1Master warning light
( P. 4 5 6 )
*1
(Canada)
ABS warning light
( P. 4 5 5 )*1Tire pressure warning light
( P. 4 5 7 )
*1Electric power steering sys-
tem warning light
( P. 4 5 5 )
Page 79 of 573

782. Instrument cluster
IS350/250_U (OM53758U)
*1: These lights turn on when the engine switch is turned to IGNITION ON mode to indicate that a system check is being perfor med. They will turn off after the engine is
on, or after a few seconds. There may be a ma lfunction in a system if the lights do not
come on, or turn off. Have the vehi cle inspected by your Lexus dealer.
*2: The light flashes to indicate a malfunction.
The indicators inform the driver of the operating state of the vehicle’s various sys-
tems.
Indicators
Turn signal indicator
( P. 1 7 0 )
(if equipped)
LDA (Lane Departure
Alert) indicator ( P. 2 0 8 )
(U.S.A.)
Headlight indicator
( P. 1 7 3 )
(if equipped)
Intuitive parking assist indi-
cator ( P. 2 1 4 )
(Canada)
Tail light indicator
( P. 1 7 3 ) *1, 2 Slip indicator ( P. 2 3 5 )
Headlight high beam indi-
cator ( P. 1 74 )
*1VSC OFF indicator
( P. 2 3 6 )
(if equipped)
Automatic High Beam indi-
cator ( P. 1 76 )*1, 3
(if equipped)
Pre-collision system warn-
ing light
( P. 241)
(if equipped)
Fog light indicator
( P. 1 8 1 )*4, 5
(if equipped)
BSM (Blind Spot Monitor)
outside rear view mirror
indicators ( P. 2 4 6 )
Cruise control indicator
( P. 192, 196)
*6Security indicator
( P. 6 9 , 7 1 )
(if equipped)
Dynamic radar cruise con-
trol indicator ( P. 1 9 6 )*7Low outside temperature
indicator ( P. 8 1 )
Cruise control “SET” indica-
tor (P. 192, 196)
*1Eco Driving Indicator Light
( P. 9 0 )