2015 Lexus CT200h key battery

CT200h_OM_OM76174U_(U)
1153-2. Opening, closing and locking the doors
3
Operation of each component
■Alarms and warning messages
An alarm sounds and warning message displays shown on the multi-information display
are used to protect against unexpected accidents or theft of the vehicle resulting from
erroneous operation. When a warning message is displayed, take appropriate measures
based on the displayed message. (→ P. 5 3 4 )
When only an alarm sounds, circumstances and correction procedures are as follows.
■Battery-saving function
The battery-saving function will be activated in order to prevent the electronic key bat-
tery and the 12-volt battery from being discharged while the vehicle is not in operation
for a long time.
●In the following situations, the smart access 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-button start has not been used for 5 days or longer.
●If the smart access system with push-button start has not been used for 14 days or
longer, the doors cannot be unlocked at any 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 mechan-
ical key, to unlock the doors.
■Conditions affecting operation
The smart access system with push-button start, wireless remote control and immobilizer
system use weak radio waves. In the following situations, the communication between the
electronic key and the vehicle may be affected, preventing the smart access system with
push-button start, wireless remote control and immobilizer system from operating prop-
erly. (Ways of coping: →P. 5 5 9 )
●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 electrical noise
●When carrying a portable radio, cellular phone, cordless phone or other wireless com-
munication devices
AlarmSituationCorrection procedure
Exterior alarm
sounds once for 5
secondsAn attempt was made to lock
the vehicle while a door was
open.Close all of the doors and
lock the doors again.
Interior alarm pings
repeatedly
The power switch was turned to
ACCESSORY m ode wh ile the
driver’s door was open (The
driver’s door was opened when
the power switch was in
ACCESSORY mode).
Turn the power switch off
and close the driver’s door.

158
CT200h_OM_OM76174U_(U)4-2. Driving procedures
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes 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 discharge. Do not leave the vehicle with the power switch in ACCES-
SORY or ON mode for long periods of time when the hybrid system is not operating.
■Sounds and vibrations specific to a hybrid vehicle
→
P. 6 7
■Electronic key battery depletion
→P. 1 0 3
■When the ambient temperature is low, such as during winter driving conditions
When starting the hybrid system, the flashing time of the “READY” indicator may be
long. Leave the vehicle as it is until the “REA DY” indicator is steady on, as steady means
the vehicle is able to move.
■Conditions affecting operation
→ P. 115
■Note for the entry function
→P. 116
■If the hybrid system does not start
The immobilizer system may not have been deactivated. ( →P. 7 3 )
Contact your Lexus dealer.
■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
In the event that the “READY” indicator does not come on even after performing the
proper procedures for starting the vehicle, contact your Lexus dealer immediately.
■If the hybrid system is malfunctioning
→ P. 5 3 7
■If the electronic key battery is depleted
→P. 5 0 2
■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. 1 6 5
■When the shift 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 your Lexus dealer immediately.

CT200h_OM_OM76174U_(U)
1714-3. Operating the lights and wipers
4
Driving
■Headlight control sensor
■Automatic light off system
●When the headlights come on: The headlights and tail lights turn off 30 seconds after a
door is opened and closed if the power switch is turned to ACCESSORY mode or
turned off. (The lights turn off immediately if on the key is pressed after all the doors
are locked.)
●When only the tail lights come on: The tail lights turn off automatically if the power
switch is turned to ACCESSORY mode or tu rned off and the driver’s door is opened.
To turn the lights on again, turn the power switch to ON mode, or turn the light switch off
once and then back to or .
■Automatic headlight leveling system (if equipped)
The level of the headlights is automatically adjusted according to the number of passen-
gers and the loading condition of the vehicle to ensure that the headlights do not inter-
fere with other road users.
■12-volt battery-saving function
In order to prevent the vehicle 12-volt battery from discharging, if the headlights and/or
tail lights are on when the power switch is turned off the 12-volt battery saving function
will operate and automatically turn off all the lights after approximately 20 minutes.
When the power switch is turned to ON mode, the 12-volt battery-saving function will be
disabled.
When any of the following are performed, the 12-volt battery-saving function is canceled
once and then reactivated. All the lights will turn off automatically 20 minutes after the
12-volt battery-saving function has been reactivated:
●When the headlight switch is operated
●When a door is opened or closed
■Customization
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features: →P. 5 9 1 )
The sensor may not function properly if an
object is placed on the sensor, or anything that
blocks the sensor is affixed to the windshield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.
NOTICE
■To prevent 12-volt battery discharge
Do not leave the lights on longer than necessary when the hybrid system is off.

426
CT200h_OM_OM76174U_(U)6-2. Using the interior lights
Turns the lights on/off
Turns the light on
Turns the door position on
*
*
: When the personal/interior light main switch is in the off position, the rear inte-
rior 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 automati cally 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.
●If the interior lights remain on when the power switch is turned off, the lights will go off
automatically after 20 minutes.
●Settings (e.g. the time elapsed before the lights turn off) can be changed.
(Customizable features: →P. 5 9 1 )
Front personal/interior lights
Rear interior light
1
2
NOTICE
To prevent 12-volt battery discharge, do not leave the lights on longer than necessary
when the hybrid system is off.

459
CT200h_OM_OM76174U_(U)
7Maintenance and care
7-1. Maintenance and careCleaning and protecting the vehicle exterior.................460
Cleaning and protecting the vehicle interior .................. 463
7-2. Maintenance Maintenance requirements............................. 465
General maintenance .............. 467
Emission inspection and maintenance (I/M)
programs .................................... 470
7-3. Do-it-yourself maintenance Do-it-yourself service precautions.................................. 471
Hood ................................................473
Positioning a floor jack ............. 475
Engine compartment ................ 476
12-volt battery.............................. 484
Tires................................................. 488
Tire inflation pressure ............... 495
Wheels ...........................................498
Air conditioning filter .............. 500
Electronic key battery ..............502
Checking and replacing fuses..............................................504
Light bulbs..................................... 507

486
CT200h_OM_OM76174U_(U)7-3. 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 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 access system with push-button start may not be
possible immediately 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 sys-
tem 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 12-volt battery is reconnected,
the vehicle will return the power switch mode to the status it was in before the 12-volt
battery was disconnected. Make sure to turn off the power before disconnect the 12-
volt battery. Take extra care when connecting the 12-volt 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 your
Lexus dealer.
WA R N I N G
■Chemicals in the 12-volt battery
The 12-volt battery contains poisonous and corrosive sulfuric acid and may produce
hydrogen gas which is flammable and explosive. To reduce the risk of death or serious
injury, take the following precautions while working on or near the 12-volt battery:
●Do not cause sparks by touching the 12-volt battery terminals with tools.
●Do not smoke or light a match near the 12-volt battery.
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the 12-volt battery.
●Keep children away from the 12-volt battery.
■Where to safely charge the 12-volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-volt battery in
a garage or closed room where there is insufficient ventilation.
■How to recharge the 12-volt battery
Only perform a slow charge (4.2 A or less). The 12-volt battery may explode if charged
at a quicker rate.

502
CT200h_OM_OM76174U_(U)7-3. Do-it-yourself maintenance
Electronic key battery
●Flathead screwdriver
●Lithium battery CR1632
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 “+” termi-
nal facing up.
Replace the battery with a new one if it is depleted.
You will need th
e following items:
Replacing the battery
1
2
3

CT200h_OM_OM76174U_(U)
5037-3. Do-it-yourself maintenance
7
Maintenance and care
■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 manufacturer.
●Dispose of used batteries according to the 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.
WA R N I N G
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking. Keep away
from children. 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 component inside the remote control.
●Do not bend either of the battery terminals.