2011 Lexus CT200h key battery

82
1-3. Opening, closing and locking the doors
CT200h_EE (OM76041E)
Alarm
Using the wireless remote control to lock the doors will set the alarm sys-
tem.
(P. 138)
Conditions affecting operation
The smart entry & start system, wireless remote control and immobilizer
system use weak radio waves. In the following situations, the communica-
tion between the electronic key and the vehicle may be affected, preventing
the smart entry & start system, wireless remote control and immobilizer sys-
tem from operating properly.
(Ways of coping: P. 617)
When the electronic key battery is depleted
Near a TV tower, electric power plant, gas station, radio station, large
display, airport or other facility that generates strong radio waves or elec-
trical noise
When carrying a portable radio, cellular phone, cordless phone or other
wireless communication devices
When the electronic key is in contact with, or is covered by the follow-
ing 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 key (that emit radio waves) is being used nearby
When carrying the electronic key together with the following devices
that emit radio waves
• Another vehicle’s electronic key or a wireless key that emits radio
waves
• Personal computers or personal 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

83
1-3. Opening, closing and locking the doors
1
Before driving
CT200h_EE (OM76041E)
If the wireless remote control does not operate properly
Locking and unlocking the doors: Use the mechanical key. (P. 617)
Electronic key battery depletion
The standard battery life is 1 to 2 years. (The card key battery life is
about a year and a half.)
If the battery becomes low, an alarm will sound in the cabin when the
hybrid system stops. (P. 577)
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 necessary. (P. 515)
• The smart entry & start system 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 1 m
(3 ft.) 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
• Glass top ranges
• Table lamps
When the electronic key battery is fully depleted
P. 5 1 5
Customization
Settings (e.g. door unlocking function) can be changed.
(Customizable features P. 655)

142
1-7. Theft deterrent system
CT200h_EE (OM76041E)
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 are locked automatically to pre-
vent 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 battery.
The doors are unlocked using the
mechanical key.
A person inside the vehicle opens a
door or hood.
The 12-volt battery is recharged or
replaced when the vehicle is locked.

198
2-1. Driving procedures
CT200h_EE (OM76041E)
Auto power off function
If the vehicle is left in ACCESSORY or ON mode (the hybrid system is not
operating) 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. 3 8
Electronic key battery depletion
P. 8 3
When the ambient temperature is low, such as during winter driving condi-
tions
It may take time until the “READY” indicator to come on.
Conditions affecting operation
P. 8 2
Notes for the entry function (vehicles with smart entry & start system)
P. 6 5
Note for the push-button start system (vehicles with push-button start sys-
tem)
P. 7 7
If the hybrid system does not start
The immobilizer system may not have been deactivated. (P. 131)
When the “POWER” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by any
authorized Lexus dealer or repairer, or another duly qualified and equipped
professional immediately.

199
2-1. Driving procedures
2
When driving
CT200h_EE (OM76041E)
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
any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional immediately.
If the hybrid system is malfunctioning
P. 5 6 0
If the electronic key battery is depleted
P. 5 1 5
Operation of the “POWER” switch
When operating the “POWER” switch, one short, firm press is enough.
If the switch is pressed improperly, the hybrid system may not start or
the “POWER” switch mode may not change. It is not necessary to press
and hold the switch.
If attempting to restart the hybrid system immediately after turning the
“POWER” switch off, the hybrid system may not start in some cases.
After turning the “POWER” switch off, please wait a few seconds before
restarting the hybrid system.
Automatically P position selection function
P. 2 1 0
When the P position control system malfunctions
The “POWER” switch will not be able to be turned off. In such a case, the
switch can be turned off after applying the parking brake.
Have the vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional immediately.

440
3-5. Using the interior lights
CT200h_EE (OM76041E)
Rear interior light
Turns the light on
Turns the door position on
*
*:
When the personal/interior
light main switch is in the off
position, the rear interior
light will not turn on even if
the door is opened with the
rear interior light switch in
door position.
Illuminated entry system
The lights automatically turn on/off according to “POWER” switch mode,
the presence 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 inte-
rior light switch (door position on/off) is on, the lights will go off automati-
cally after 20 minutes.
Customization
Settings (e.g. the time elapsed before the lights turn off) can be changed.
(Customizable features P. 655)
Rear interior light

4Maintenance and care
465
CT200h_EE (OM76041E)
4-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ........ 466
Cleaning and protecting
the vehicle interior ......... 471
4-2. Maintenance
Maintenance
requirements .................. 474
4-3. Do-it-yourself maintenance
Do-it-yourself service
precautions..................... 477
Hood ................................ 481
Positioning a floor jack .... 483
Engine compartment ........ 485
12-volt battery.................. 496
Tires ................................. 503
Tire inflation pressure ...... 507
Wheels ............................. 509
Air conditioning filter ....... 511
Electronic key battery ...... 515
Checking and replacing
fuses ............................... 520
Light bulbs ....................... 534

499
4-3. Do-it-yourself maintenance
4
Maintenance and care
CT200h_EE (OM76041E)
Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, observe the following precautions before
recharging:
If recharging with the 12-volt battery installed on the vehicle, be sure to
disconnect the ground cable.
Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12-volt battery.
After recharging/reconnecting the 12-volt battery
Unlocking the doors using the smart entry & start system may not be
possible immediately after reconnecting the 12-volt battery. If this hap-
pens, 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
reconnected, 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 con-
necting the battery if the “POWER” switch mode prior to discharge is
unknown.
Restart the hybrid system, depress the brake pedal, and confirm that it is
possible to shift into each shift position.
If the system will not start even after multiple attempts at all methods above,
contact any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.