2015 Lexus GS450h key battery

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GS450h_OM_OM30E26U_(U)
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6-3. Do-it-yourself maintenanceDo-it-yourself service precautions................................ 423
Hood ............................................... 426
Positioning a floor jack..............427
Engine compartment ............... 429
12-volt battery ............................. 439
Tires.................................................. 443
Tire inflation pressure ............... 453
Wheels ........................................... 456
Air conditioning filter ............... 458
Electronic key battery.............. 460
Checking and replacing fuses.............................................. 462
Headlight aim ............................... 477
Light bulbs .....................................479
7-1. Essential information Emergency flashers .................. 494
If your vehicle has to be stopped in an emergency.... 495 7-2. Steps to take in an emergency
If your vehicle needs to be towed................................ 496
If you think something is wrong ................ 502
If a warning light turns on or a warning buzzer sounds..... 503
If a warning message is displayed ..................................513
If you have a flat tire ....................541
If the hybrid system will not start ............................... 554
If the shift lever cannot be shifted from P ..................... 556
If the parking brake cannot be released .................................557
If the electronic key does not operate properly ..................... 559
If the 12-volt battery is discharged............................. 562
If your vehicle overheats ......... 566
If the vehicle becomes stuck ............................................... 571
7When trouble arises

841-3. Theft deterrent system
GS450h_OM_OM30E26U_(U)
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the fol-
lowing:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
■Alarm-operated door lock
●When the alarm is operating, the doors ar e locked automatically to prevent intrud-
ers.
●Do not leave the key inside the vehicle when the alarm is operating, and make sure
the key is not inside the vehicle when re charging or replacing the 12-volt battery.
●A person inside the vehicle opens a door,
the trunk or hood.
●The 12-volt battery is recharged or replaced
when the vehicle is locked. (P. 5 6 4 )
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper operation
of the system cannot be guaranteed.

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GS450h_OM_OM30E26U_(U)
3-1. Key information
Keys
The following keys are provided with the vehicle.Electronic keys
• Operating the smart access systemwith push-button start ( P. 1 2 3 )
• Operating the wireless remote control function ( P. 1 3 6 )
Mechanical keys
Key number plate
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 cylin-
der, 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. 559)
The keys
1
2
3
Using the mechanical key

GS450h_OM_OM30E26U_(U)
1293-2. Opening, closing and locking the doors and trunk
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Operation of each component
■Battery-saving function
The battery-saving function will be activa ted in order to prevent the electronic key
battery and the 12-volt battery from bein g discharged while the vehicle is not in
operation for a long time.
●In the following situations, the smart acce ss system with push-button start may take
some time to unlock the doors.
• The electronic key has been left in an area of approximately 6 ft. (2 m) of the outside of the vehicle for 10 minutes or longer.
• The smart access system with push-butto n start has not been used for 5 days or
longer.
●If the smart access system with push-butto n start has not been used for 14 days or
longer, the doors cannot be unlocked at an y doors except the driver’s door. In this
case, take hold of the driver’s door handle, or use the wireless remote control or the
mechanical key, to unlock the doors.
■Electronic Key Battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping the
electronic key from receiving radio waves.
Press twice while pressing and holding
. Confirm that the electronic key indi-
cator flashes 4 times.
While the battery-saving mode is set, the
smart access system wi th push-button start
cannot be used. To cancel the function, press
any of the electronic key buttons.

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GS450h_OM_OM30E26U_(U)
3-2. Opening, closing and locking the doors and trunk
■Conditions affecting operation
The smart access system with push-button start uses weak radio waves. In the follow-
ing situations, the communication between the electronic key and the vehicle may be
affected, preventing the smar t access system with push-button start, wireless remote
control and immobilizer system from operating properly. (Ways of coping: P. 559)
●When the electronic ke y battery is depleted
●Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility that generates strong radio waves or electrical noise
●When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
●When the electronic key is in contact with, or is covered by the following metallic
objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
•Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When other wireless keys (that emit radio waves) are being used nearby
●When carrying the electronic key togeth er with the following devices that emit
radio waves
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or person al digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or metallic objects are attached to the rear
window

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GS450h_OM_OM30E26U_(U)
3-2. Opening, closing and locking the doors and trunk
■Note for locking the doors
●Touching the door lock sensor while we aring gloves may delay or prevent lock
operation. Remove the gloves an d touch the lock sensor again.
●If the door handle becomes wet while the electronic key is within the effective
range, the door may lock and unlock repe atedly. In that case, follow the following
correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart access sys- tem with push-button start. ( P. 1 2 9 )
●If the electronic key is inside the vehicle and a door handle becomes wet during a
car wash, a message may be shown on th e multi-information display and a buzzer
will sound outside the vehicle. To turn off the alarm, lock all the doors.
●The lock sensor may not work properly if it comes into contact with ice, snow, mud,
etc. Clean the lock sensor and attempt to operate it again, or use the lock sensor
on the lower part of the door handle.
●Fingernails may scrape against the door during operation of the door handle. Be
careful not to injure fingernails or damage the surface of the door.
■Note for the unlocking function
●A sudden approach to the effective rang e or door handle may prevent the doors
from being unlocked. In this case, return the door handle to the original position
and check that the doors unlock befo re pulling the door handle again.
●Gripping the door handle when wearing a glove may not unlock the door.
●If the door handle becomes wet while the electronic key is within the effective
range, the door may lock and unlock repe atedly. In that case, follow the following
correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart access sys- tem with push-button start. ( P. 1 2 9 )
●If there is another electronic key in the de tection area, it may take slightly longer to
unlock the doors after the door handle is gripped.
●Fingernails may scrape against the door during operation of the door handle. Be
careful not to injure fingernails or damage the surface of the door.

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GS450h_OM_OM30E26U_(U)
3-2. Opening, closing and locking the doors and trunk
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
●If the battery becomes low, an alarm will sound in the cabin when the hybrid system
stops. ( P. 5 3 9 )
●As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indicate
that the electronic key battery may be depleted. Replace the battery when neces-
sary. ( P. 4 6 0 )
• The smart access system with push-button start or the wireless remote control does not operate.
• 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 3 ft. (1 m) 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
■When the electronic key battery is fully depleted
 P. 4 6 0
■Customization
Settings (e. g. smart access system with push-button start) can be changed.
(Customizable features: P. 5 9 9 )
■If the smart access system with push-but ton start has been deactivated in a cus-
tomized setting
●Locking and unlocking the doors and opening the trunk:
Use the wireless remote control or mechanical key. ( P. 136, 559)
●Starting the hybrid system and changing power switch modes:  P. 5 6 0
●Stopping the hybrid system: P. 1 9 4

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GS450h_OM_OM30E26U_(U)
3-2. Opening, closing and locking the doors and trunk
■If the wireless remote control does not operate properly
Locking and unlocking the doors and open ing the trunk: Use the mechanical key.
(  P. 5 5 9 )
■Electronic key battery depletion
P. 1 3 4
■When the electronic key battery is fully depleted
P. 4 6 0
■Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask your
Lexus dealer for details.
■Customization
Settings (e.g. wireless remote control system) can be changed.
(Customizable features: P. 5 9 9 )
■Certification for wireless remote control
For vehicles sold in the U.S.A.
FCC ID: HYQ23AAB FCC ID: HYQ14FBA
FCC ID: NI4TMLF10-3 FCC ID: NI4TMLF10-50
FCC ID: NI4TMLF10-51
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesire d operation.
FCC WARNING:
Changes or modifications not expressly ap proved by the party responsible for com-
pliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
NOTE:
This device complies with Industry Cana da licence-exempt RSS standard(s). Oper-
ation is subject to the following two conditio ns: (1) this device may not cause interfer-
ence, and (2) this device must accept any interference, including interference that
may cause undesired operation of the device.