key battery Lexus HS250h 2010 User Guide

100
1-7. Theft deterrent system
HS250h_U_75033U(Canada)
■Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
■When the 12 volt battery is disconnected
Be sure to cancel the alarm system.
If the 12 volt battery is disconnected before canceling the alarm, the system may be
triggered when the battery is reconnected.
■Alarm-operated door lock
●When the alarm is operating, the doors are locked automatically to prevent
intruders.
●Do not leave the key inside the vehicle when the alarm is operating, and make
sure the key is not inside the vehicle when recharging or replacing the 12 volt
battery.
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.
●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
HS250h_U_75033U(Canada)
■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 spec ific 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
dealer immediately.
■If the “READY” indicator does not come on
If the “READY” indicator does not come on when you press the “POWER” switch
with 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
HS250h_U_75033U(Canada)
■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 doors are opened/closed.
■To prevent 12-volt battery discharge
If the interior lights remain on when the door is not fully closed and the interior light
switch (door position on/ off) is on, the lights 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 74 )
Personal lights

Maintenance and care4
401
HS250h_U_75033U(Canada)
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
HS250h_U_75033U(Canada)
■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 key system may not be possible immedi-
ately after reconnecting 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 “POWER” 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
before 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 multiple attempts, contact your Lexus dealer.
■ Exterior
Make sure that the 12-volt battery terminals are not corroded and
that there are no loose connections, cracks or loose clamps.
Te r m i n a l s
Hold-down clamp

453
4-3. Do-it-yourself maintenance
4
Maintenance and care
HS250h_U_75033U(Canada)
Electronic key battery
Replace the battery with a new one if it is depleted.
■You will need th e following items:
● Flathead screwdriver
● Small Phillips-head screwdriver
● Lithium battery (CR1632)
■ Replacing 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.

454
4-3. Do-it-yourself maintenance
HS250h_U_75033U(Canada)
■Use a CR1632 lithium battery
●Batteries can be purchased at your Lexus dealer, local electrical appliance
shops or camera stores.
●Replace only with the same or equivalent type recommended by the manufac-
turer.
●Dispose of used batteries according to local laws.
■When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer
can replace the battery for you.
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart access system with push-button start and wireless remote control will
not function properly.
●The operational range will be reduced.
CAUTION
■Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child, they can
cause choking. Failure to do so could result in death or serious injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other components inside the remote control.
●Do not bend either of the battery terminals.

When trouble arises5
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HS250h_U_75033U(Canada)
5-1. Essential informationEmergency flashers .............. 482
If your vehicle needs to be towed ...................................... 483
If you think something is wrong ...................................... 489
Event data recorder.............. 490
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds..................................... 492
If a warning message is displayed................................. 501
If you have a flat tire................ 521
If the hybrid system will not start ......................................... 530
If you lose your keys .............. 532
If the electronic key does not operate properly.......... 533
If the vehicle 12-volt battery is discharged ......... 536
If your vehicle overheats ...... 541
If the vehicle becomes stuck........................................ 545
If your vehicle has to be stopped in an
emergency ............................. 547

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5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)

Power was turned
off due to the
automatic power
off function.
Next time when
starting the hybrid
system, increase
the engine speed
slightly and main-
tain that level for
approximately 5
minutes to
recharge the 12-
volt battery.
OnceThe electronic key
has a low battery.Replace the elec-
tronic key battery.
(→ P. 4 5 3 )
Interior
buzzerExterior buzzerWarning messageDetailsCorrection
procedure

530
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
■ The hybrid system will not star t even though the correct starting
procedure is being followed. ( →P. 145)
One of the following may be the cause of the problem:
● The electronic key may not be functioning properly.* ( →P. 533)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● There may be a malfunction in the immobilizer system.* ( →P. 9 6 )
● There may be a malfunction in the P position control system.*
(→ P. 148, 502)
● The hybrid system may be malfunctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunction, an interim measure is avail-
able to start the hybrid system. ( →P. 455)
*: It may not be possible to shift out of the P position.
■The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( →P. 5 3 6 )
● The 12-volt battery terminal connections may be loose or cor-
roded.