2013 Lexus IS300h Smart key battery

4487-3. Do-it-yourself maintenance
IS300h_EE(OM53B95E)
The meanings of each caution symbol on the top of the 12-volt battery are
as follows:
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
The hybrid system may not start. Follow the procedure below to initialize the
system.
Shift the shift lever to P.
Open and close any of the doors.
Restart the hybrid system.
Unlocking the doors using the smart entry & start system 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 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 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
switch before disconnecting the 12-volt battery. Take extra care when connect-
ing the 12-volt battery if the power switch mode prior to the 12-volt battery
being disconnected is unknown.
If the system will not start even after multiple attempts at all the methods above,
contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Caution symbols
No smoking, no naked
flames, no sparks12-volt battery acid
Shield eyesNote operating instruc-
tions
Keep away from childrenExplosive gas
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4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53B95E)
Remove the depleted battery.
Insert a new battery with the “+” ter-
minal facing up.
Use a CR2032 lithium battery
Batteries can be purchased at any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional, 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 entry & start system and wireless remote control will not function
properly.
The operational range will be reduced.
Certification for the key battery
Replace only with the same or equivalent type recommended by the manufac-
turer.
Dispose of used batteries according to local laws.
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5288-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Once
The electronic key has a low bat-
tery.
Replace the electronic key
battery. (P. 472)
Once
The steering lock could not be
released within 3 seconds of the
power switch being pressed.
Press the power switch while
depressing the brake pedal
and moving the steering wheel
left and right.
Once
Indicates a malfunction in the
smart entry & start system
Have the vehicle inspected by
any authorized Lexus dealer
or repairer, or another duly
qualified and equipped profes-
sional.
Once
• When the doors were unlocked
with the mechanical key and
then the power switch was
pressed, the electronic key
could not be detected in the
vehicle.
• The electronic key could not
be detected in the vehicle even
after the power switch was
pressed two consecutive times.
Touch the electronic key to
the power switch while
depressing the brake pedal.
Once
During a hybrid system starting
procedure in the event that the
electronic key was not function-
ing properly (P. 550), the
power switch was touched with
the electronic key.
Press the power switch within
10 seconds of the buzzer
sounding.
Interior
buzzerExterior
buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

5498-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
Doors
Use the mechanical key (P.
131) in order to perform the fol-
lowing operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks all the doors
Opens the windows and moon roof (turn and hold)
*
*
: This setting must be customized at any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
Trunk
Turn the mechanical key clock-
wise to open.
If the electronic key does not operate properly
If communication between the electronic key and vehicle is interrupted
(P. 151) or the electronic key cannot be used because the battery is
depleted, the smart entry & start system and wireless remote control can-
not be used. In such cases, the doors and trunk can be opened and the
hybrid system can be started by following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key
linked functions
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5508-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of
the electronic key to the power
switch.
When the electronic key is detected,
a buzzer sounds and the power
switch will turn to ON mode.
When the smart entry & start system
is deactivated in customization set-
ting, the power switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on the
multi-information display.
Press the power switch.
In the event that the hybrid system still cannot be started, contact any
authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Stopping the hybrid system
Shift the shift lever to P and press the power switch as you normally do when
stopping the hybrid system.
Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec-
tronic key battery be replaced immediately when the battery is depleted. (P.
472)
Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set, the
alarm may be triggered.
Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the switch
is pressed. (P. 210)
When the electronic key does not work properly
Make sure that the smart entry & start system has not been deactivated in the
customization setting. If it is off, turn the function on.
(Customizable features P. 575)
Check if battery-saving mode is set. If it is set, cancel the function. (P. 150)
Starting the hybrid system
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5538-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
Once the hybrid system has started, remove the jumper cables in the
exact reverse order from which they were connected.
Once the hybrid system starts, have the vehicle inspected at any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped
professional as soon as possible.
Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
To prevent 12-volt battery discharge
Turn off the headlights and the audio system while the hybrid system is off.
Turn off any unnecessary electrical components when the vehicle is running at
a low speed for an extended period, such as in heavy traffic.
Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the 12-volt battery
may discharge, and the hybrid system may be unable to start. (The 12-volt bat-
tery recharges automatically while the hybrid system is operating.)
When recharging or replacing the 12-volt battery
For vehicles with an alarm: Make sure that the key is not inside the vehicle
when recharging or replacing the 12-volt battery. The key may be locked in the
vehicle if the alarm is activated. (P. 98)
In some cases, it may not be possible to unlock the doors using the smart entry
& start system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a mal-
function.
The power switch mode is memorized by the vehicle. When the 12-volt battery
is reconnected, the system will return to the mode it was in before the 12-volt
battery was discharged. Before disconnecting the 12-volt battery, turn the
power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery
discharged, be especially careful when reconnecting the 12-volt battery.
8

601Alphabetical index
IS300h_EE(OM53B95E)
Jack
Positioning the jack ..............438
Vehicle-equipped jack ..........460
Jack handle ................................460
Jam protection function
Moon roof .............................188
Power window ......................185
Keyless entry
Smart entry & start
system.........................136, 143
Wireless remote control136, 143
Keys...........................................130
Battery-Saving Function.......150
Electronic key .......................130
If the electronic key does not
operate properly .................549
Key number plate .................130
Keyless entry ................136, 143
Mechanical key.....................131
Power switch ........................209
Replacing the battery ............472
Warning buzzer ....................137
Wireless remote control........130
Knee airbags ................................43Lane Departure Alert (LDA) .... 264
Language
(multi-information display).... 118
LDA (Lane Departure Alert) .... 264
Lever
Auxiliary catch lever ........... 437
Hood lock release lever ....... 437
Shift lever ............................ 216
Turn signal lever .................. 222
Wiper lever .......................... 235
Lexus Display Audio system.... 316
Lexus Display Audio controller 318
Lexus parking assist-sensor ...... 271
License plate lights ................... 226
Light switch ......................... 226
Replacing light bulbs ........... 493
Light bulbs
Replacing ............................. 481
Wattage ................................ 572
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