2010 Lexus HS250h key battery

55
1-3. Opening, closing and locking the doors
1
Before driving
■Pa n i c m o d e
■Security feature
P. 4 8
■Alarm
Using the wireless remote control to lock the doors will set the alarm system. 
(  P. 9 8 )
■Conditions affecting operation
 P. 4 9
■If the wireless remote control does not operate properly
Locking and unlocking the doors, unlocking the trunk: Use the mechanical key.
( P. 5 3 3 )
■Electric key battery depletion
 P. 5 2
■When the electric key battery is fully depleted
P. 4 5 3
■Customization
Settings (e.g. door unlocking function) can be changed. 
(Customizable features  P. 5 7 2 )
When is pressed for longer than about
one second, an alarm will sound intermit-
tently and the vehicle lights will flash to deter
any person from trying to break into or dam-
age your vehicle.
To stop the alarm, press any button on the
electronic key.

87
1-5. Opening and closing the windows and moon roof
1
Before driving
■The power windows can be operated when
The “POWER” switch is in ON mode.
■Operating the power windows after turning the hybrid system off
The power windows can be operated for approximately 43 seconds even after the
“P
OWER” switch is turned to ACCESSORY mode or turned off. They cannot,
however, be operated once either front door is opened.
■Jam protection function
If an object becomes caught between th e
window and the window frame, window
travel is stopped and the window is opened slightly.
■Door lock linked window operation
●The power windows can be opened and closed using the mechanical key. * 
(  P. 5 3 3 )
●The power windows can be opened using the wireless remote control. *
( P. 5 4 )
*: This setting must be cust omiz
ed at your Lexus dealer.
■When the 12-volt battery is disconnected
The window lock switch is disabled. If necessary, press the window lock switch after
r

econnecting the battery.
■Customization
Settings (e.g. linked door lock operation) can be changed. 
(Customizable features  P. 5 7 2)

99
1-7. Theft deterrent system
1
Before driving
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
fo
llowing:
●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.
■Tr i g g e r i n g o f t h e a l a r m
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the alarm system.)
■ Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarms:
●U
nlock the doors or trunk using the entry function, wireless
remote control or mechanical key.
● Star
t the hybrid system. (The alarm will be deactivated or stopped
after a few seconds.)
●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.

147
2-1. Driving procedures
2
When driving
■Auto power off function
If the vehicle is left in ACCESSORY or ON mode (the hybrid system is not operat-
ing) for more than an hour with the shift
position in P, the “POWER” switch will
automatically turn off. However, this function cannot entirely prevent the 12-volt
battery from discharging. Do not leave the vehicle with the “POWER” switch in
ACCESSORY or ON mode for long periods of time when the hybrid system is not
operating.
■Sounds and vibrations specific to a hybrid vehicle
 P.
2 6
■Electronic key battery depletion
P.
5 2
■When the ambient temperature is low, such as during winter driving conditions
It may take time until the “READY” indicator to come on.
■Conditions affecting operation
P.
4 9
■Notes for the entry function
P.
5 0
■If the hybrid system does not start
The immobilizer system may not have been deactivated. ( P.
9 6 )
■When the “POWER” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
de

aler immediately.
■If the “READY” indicator does not come on
If the “READY” indicator does not come on when you press the “POWER” switch
wit
h the shift position in P and the brake pedal depressed, contact your Lexus
dealer immediately.
■If the hybrid system is malfunctioning
 P. 5 0 1
■If the electronic key battery is depleted
P.
4 5 3

362
3-5. Using the interior lights
■Illuminated entry system
The lights automatically turn on/off according to “POWER” switch mode, the pres-
ence of the electronic key, whether the doors are locked/unlocked, and whether
the do
ors are opened/closed.
■To prevent 12-volt battery discharge
If the interior lights remain on when the do or is
not fully closed and the interior light
switch (door position on/ off) is on, the li ghts will go off automatically after 20 min -
utes.
■Customization
Settings (e.g. the time elapsed before the lights turn
off) can be changed. (Custom -
izable features P. 5 7 2 )
Pe r s o n a l l i g h t s

Maintenance and care4
401
4-1. Maintenance and careCleaning and protecting 
the vehicle exterior............ 402
Cleaning and protecting 
the vehicle interior .............. 406
4-2. Maintenance Maintenance 
requirements ........................ 409
General maintenance ............ 411
Emission inspection and 
maintenance (I/M) 
programs................................. 415 4-3. Do-it-yourself maintenance
Do-it-yourself service 
precautions ............................ 416
Hood ........................................... 419
Positioning a floor jack ......... 420
Engine compartment ........... 422
12-volt battery ........................ 433
Tires............................................ 437
Tire inflation pressure........... 445
Wheels ...................................... 448
Air conditioning filter ........... 450
Electronic key battery.......... 453
Checking and replacing 
fuses ........................................ 455
Headlight aim 
(LED headlights) .................. 467
Light bulbs ................................ 469

434
4-3. Do-it-yourself maintenance
■Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flammable
and
explosive. Therefore, observe the following precautions before recharging:
●If recharging with the 12-volt battery installed on the vehicle, be sure to discon -
nect the ground cable.
●Make sure the power switch on the charger is off when connecting and discon -
necting the charger cables to the 12-volt battery.
■After recharging/reconnecting the 12-volt battery
●Unlocking the doors using the smart ke y system may not be possible immedi-
ately after disconnecting the 12
-volt battery. If this happens, use the wireless
remote control or the mechanical key to lock/unlock the doors.
●Start the hybrid system with the “P OWER” switch in ACCESSORY mode. The
hybrid system may not start with the “POWER” switch turned OFF. However,
the hybrid system will operate normally from the second attempt.
●The “POWER” switch mode is recorded by the vehicle. If the battery is recon -
nected, the vehicle will return the “POWER” switch mode to the status it was in
be
fore the battery was disconnected. Make sure to turn off the power before
disconnect the battery. Take extra care when connecting the battery if the
“POWER” switch mode prior to discharge is unknown.
If the system will not start even after mult i
ple attempts, contact your Lexus dealer.
■Exterior
Make sure that the 12-volt ba ttery terminals are not corroded and
that there are no loose connect ions, cracks or loose clamps.
Terminals
Hold-down clamp

453
4-3. Do-it-yourself maintenance
4
Maintenance and care
Electronic key battery
Replace the battery with a new one if it is depleted.
■You will need the following items:
●F
lathead screwdriver
●Small Phillips-head sc rewd
river
● Lithium batter
y (CR1632)
■ R
eplacing the battery
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a rag.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.