2015 LEXUS LX570 key battery

501-2. Opening, closing and locking the doors
LX570_OM_OM60L96U_(U) ■
Operation signals ●
Doors: A buzzer sounds and the emergenc y flashers flash to indicate that the
doors have been locked/unlocked. (Locked: Once; Unlocked: Twice) ●
Windows and moon roof: A buzzer sounds to indicate that the windows and
moon roof are opening.■
Operating conditions
The wireless remote control will not operate when the “ENGINE START STOP”
switch is in any position other than OFF. ■
Door lock buzzer
If a door is not fully closed, a buzzer soun ds continuously for 5 seconds if an attempt
to lock the door is made. Fully close the d oor to stop the buzzer, and lock the vehi-
cle once more. ■
Power back door operation
The power back door can be opened while the vehicle is locked. (one motion) ■
Alarm
Using the wireless remote control to lock the door will set the alarm system. ■
Electronic key battery depletion
 P. 42■
Security feature
 P. 44■
If the wireless remote control does not operate properly ●
Locking and unlocking the doors: Use the mechanical key. (  P. 872)●
Starting the engine:  P. 873■
When the electronic key battery is fully depleted
 P. 784■
Conditions affecting operation
 P. 40■
Customization
Settings (e.g. unlocking fu nction) can be changed.
(Customizable features  P. 912)

1231-6. Theft deterrent system
1
Before driving
LX570_OM_OM60L96U_(U) ■
When the battery is disconnected
Be sure to cancel the alarm system.
If the battery is disconnected before canceling the alarm, the system may be trig-
gered when the battery is reconnected. ■
Alarm-operated door lock ●
When the alarm is operating, the door s 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 wh en recharging or replacing the battery.■
Panic mode
NOTICE■
To ensure the system operates correctly
Do not modify or remove the system. If mo dified or removed, the proper operation
of the system cannot be guaranteed. When is pressed for longer than about
one second, the head lights/tail lights/emer-
gency flashers will flash, the front and rear
interior lights will come on, and an alarm will
sound for about 60 seconds to deter any
person from trying to break into or damage
your vehicle.
To stop the alarm, press any button on the
wireless remote control.

1792-1. Driving procedures
2
When driving
LX570_OM_OM60L96U_(U) ■
Operation of the “ENG INE START STOP” switch
When operating the “ENGINE START STOP ” switch, one short, firm press is
enough. If the switch is pressed improp erly, the engine may not start or the
“ENGINE START STOP” switch mode may not change. It is not necessary to press
and hold the switch. ■
When the steering lock cannot be released
■
If the engine does not start
The engine immobilizer system may not have been deactivated. (  P. 119)
Contact your Lexus dealer. ■
When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately. ■
Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes with the shift
lever in P, the “ENGINE START STOP” switch will automatically turn off. However,
this function cannot entirely prevent battery discharge. Do not leave the vehicle
with the “ENGINE START STOP” switch in ACCESSORY mode for long periods
of time when the engine is not running. ■
Electronic key battery depletion
 P. 42■
When the electronic key battery is discharged
 P. 872■
Conditions affecting operation
 P. 40 The green indicator light on the “ENGINE
START STOP” switch will flash and a mes-
sage will be shown on the multi-information
display. Press the “ENGINE START STOP”
switch again while turning the steering wheel
left and right.

Maintenance and care
4
733
LX570_OM_OM60L96U_(U) 4-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ............ 734
Cleaning and protecting
the vehicle interior ............. 737
4-2. Maintenance
Maintenance
requirements ....................... 740
General maintenance.......... 743
Emission inspection and
maintenance (I/M)
programs ............................... 746
4-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ............................ 747
Hood .......................................... 750
Engine compartment ............ 751
Tires ............................................ 766
Tire inflation pressure .......... 775
Wheels ....................................... 779
Air conditioning filter ............ 781
Electronic key battery ......... 784
Checking and
replacing fuses..................... 786
Light bulbs ................................ 803

7844-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) Electronic key battery Replace the battery with a ne w one if it is discharged.
■ You will need the following items:
● Flathead screwdriver (T o prevent damage to the key, cover the
tip of the screwdriver with rag.)
● Small Phillips-head screwdriver
● Lithium battery (CR1632)
■ Replacing the battery
Take out the mechanical key
(  P. 31).
Remove the cover.
Remove the depleted battery. Insert a new battery with the “+”
terminal facing up.STEP 1
STEP 2
STEP 3

7854-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) ■
If the electronic key battery is discharged
The following symptoms may occur. ●
The smart access system with push-butto n start and wireless remote control will
not function properly. ●
The operational range is reduced.■
Use a CR1632 lithium battery ●
Batteries can be purchased at your Lexus dealer, jewelers, or camera stores. ●
Replace only with the same or equiva lent type recommend ed by your Lexus
dealer. ●
Dispose of used batteries according to the local laws.■
When the card key battery needs to be replaced
The battery for the card key is available on ly at Lexus dealer. Your Lexus dealer can
replace the battery for you.
CAUTION■
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 co uld 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 comp onents inside the electronic key.●
Do not bend the battery terminals.

When trouble arises
5
815
LX570_OM_OM60L96U_(U) 5-1. Essential information
Emergency flashers ............... 816
If your vehicle needs to be
towed ....................................... 817
If you think something is
wrong ..................................... 824
Fuel pump shut off
system .................................... 825 5-2. Steps to take in an
emergency
If a warning light turns on
or a warning buzzer
sounds... ................................. 826
If a warning message is
displayed................................ 837
If you have a flat tire .............. 854
If the engine will not
start ......................................... 868
If the shift lever cannot be
shifted from “P”.................... 870
If you lose your keys ............... 871
If the electronic key does
not operate properly ......... 872
If the battery is
discharged ............................ 875
If your vehicle overheats ..... 878
If the vehicle becomes
stuck......................................... 881
If your vehicle has to be
stopped in an
emergency............................ 883

5
When trouble arises
8495-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) * : If the engine does not start when the electronic key is inside the vehicle, the
electronic key battery may be depleted or there may be difficulty receiving sig-
nal from the key. (  P. 872)Interior
buzzer Exterior
buzzerWarning message Details Correction
procedure
Once 
(Flashes) An attempt was
made to start the
engine without
the electronic key
being present, or
the electronic key
was not function-
ing normally.
An attempt was
made to drive
when the regular
key was not inside
the vehicle. Start the engine
with the elec-
tronic key
present
* .