Page 67 of 860

671-1. For safe use
GS450h_U (OM30D01U)
1
For safety and security
CAUTION
■When installing a booster seat
To prevent the belt from going into ALR lock mode, do not fully extend the shoul-
der belt. ALR mode causes the belt to tighten only. This could cause injury or dis-
comfort to the child. (P. 3 4 )
■When installing a child restraint system
Follow the directions given in the child restraint 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 passen-
gers may be seriously injured or even 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 righ t-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
system on the front se at 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
illuminated. Failure to do so may result in
death or serious injury if the airbags deploy
(inflate).
Page 69 of 860

691-1. For safe use
GS450h_U (OM30D01U)
1
For safety and security
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if
inhale.
CAUTION
Exhaust gases include harmful carbon mono xide (CO), which is colorless and odor-
less. Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an acci-
dent 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 even when the trunk lid is closed, open
the windows and have the vehicle inspected at your Lexus dealer as soon as pos-
sible.
■When parking
●If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop
the hybrid system.
●Do not leave the vehicle with the hybrid system 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 hybrid system operating in an area with snow build-up, or where
it is snowing. If snowbanks build up around the vehicle while the hybrid system is
operating, 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 76 of 860

761-2. Hybrid system
GS450h_U (OM30D01U)
■If a warning light comes on, a warning message is displayed, or the 12-volt battery is
disconnected
The hybrid system may not start. In that case, try to start the system again. If the
“READY” indicator does not come on, contact your Lexus dealer.
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel
the vehicle with at least enough gasoline to make the low fuel level warning light
( P. 714) go off. If there is only a small amount of fuel, the hybrid system may not be
able to start. (The minimum amount of fuel to add to make the low fuel level warning
light go out is about 2.6 gal. [10.0 L, 2.2 Imp.gal.], when the vehicle is on a level sur-
face. This value may vary when the vehicle is on a slope.)
■Electromagnetic waves
●High voltage parts and cables on the hybr id vehicles incorporate electromagnetic
shielding, and therefore emit approximately the same amount of electromagnetic
waves as conventional gasoline powered vehicles or home electronic appliances.
●Your vehicle may cause sound interference in some third party-produced radio
parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery) has a limited service life. The lifespan of the
hybrid battery (traction battery) can change in accordance with driving style and
driving conditions.
Page 79 of 860
791-3. Theft deterrent system
GS450h_U (OM30D01U)
1
For safety and security
Immobilizer system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
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 to the security system (key with a
built-in transponder chip) of another vehicle
The vehicle’s keys have built-in tr ansponder 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 81 of 860
811-3. Theft deterrent system
GS450h_U (OM30D01U)
1
For safety and security
Alarm
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 deactivate or stop the alarms:
●Unlock the doors or open the trunk.
●Turn the power switch to ACCESS ORY or ON mode, or start the
hybrid system. (The alarm will be deactivated or stopped after a few
seconds.)
The alarm
Setting the alarm system
Deactivating or stopping the alarm
Page 83 of 860
83
GS450h_U (OM30D01U)
Instrument cluster2
2. Instrument cluster Warning lights and indicators .............................. 84
Gauges and meters ..................... 89
Multi-information display .......... 94
Head-up display .......................... 102
Energy monitor/ consumption screen ............... 109
Page 84 of 860
84
GS450h_U (OM30D01U)
2. Instrument cluster
Warning lights and indicators
◆Instrument cluster
The units used on the speedometer and some indicators may differ depending on
the target region.
◆Center panel
The warning lights and indicators on the instrument cluster and center
panel inform the driver of the status of the vehicle’s various systems.
For the purpose of explanation, th e following illustration displays all
warning lights and indicators illuminated.
Page 85 of 860

GS450h_U (OM30D01U)
852. Instrument cluster
2
Instrument cluster
Warning lights inform the driver of malfunctions in the indicated vehicle’s
systems.
Warning lights
*1
(U.S.A.)
Brake system warning light
( P. 711)*1, 2
(if equipped)
“AFS OFF” indicator
( P. 7 1 3 )
*1
(Canada)
Brake system warning light
( P. 711)*1, 2Brake hold operated
indicator ( P. 7 1 3 )
*1Charging system warning
light ( P. 7 1 2 )*2
(U.S.A.)
Parking brake indicator
( P. 7 1 3 )
*1
(U.S.A.)
Malfunction indicator
lamp ( P. 7 1 2 )*2
(Canada)
Parking brake indicator
( P. 7 1 3 )
*1
(Canada)
Malfunction indicator
lamp ( P. 7 1 2 )*1Brake system warning light
( P. 7 1 4 )
*1SRS warning light
( P. 7 1 2 )Open door warning light
( P. 7 1 4 )
*1
(U.S.A.)
ABS warning light
( P. 7 1 2 )Low fuel level warning light
( P. 7 1 4 )
*1
(Canada)
ABS warning light
( P. 7 1 2 )Seat belt reminder light
( P. 7 1 4 )
*1Electric power steering
system warning light
( P. 7 1 2 )*1Master warning light
( P. 7 1 4 )