2010 Lexus GX460 key battery

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1-2. Opening, closing and locking the doors and trunk
GX460_U.S.A. (OM60E69U)
■Conditions affecting operation
P. 4 0
■If the wireless remote control does not operate properly
Locking and unlocking the doors: Use the mechanical key. ( P. 7 3 8 )
■Key battery depletion
P. 4 5
■When the electronic key battery is fully depleted
P. 6 4 2
■Customization
Settings (e.g. wireless remote control system) can be changed. 
(Customizable features P. 7 8 1 )

118
1-6. Theft deterrent system
GX460_U.S.A. (OM60E69U)
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
following:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Tr i g g e r i n g o f t h e a l a r m
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
●A person inside the vehicle opens a door or hood.
●The battery is recharged or replaced when the vehicle is locked.
■Alarm memory function
After the alarm is activated, when you unlock any door using a entry function, wire-
less remote control or mechanical key, the tail lights turn on for about 2 seconds to
inform you that the system was activated.
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.

183
2-1. Driving procedures
2
When driving
GX460_U.S.A. (OM60E69U)
■Electronic key battery depletion
P. 4 5
■Conditions affecting operation
P. 4 0
■Notes for the entry function
P. 4 2
■If the engine does not start
The engine immobilizer system may not have been deactivated. ( P. 114)
■Steering lock
After turning the “ENGINE START STOP” switch off and opening and closing the
doors, the steering wheel will be locked due to the steering lock function. Operat-
ing the “ENGINE START STOP” switch again automatically cancels the steering
lock.
■When the steering lock cannot be released
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.

184
2-1. Driving procedures
GX460_U.S.A. (OM60E69U)
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended
if the engine is turned on and off repeatedly in a short period of time. In this case,
refrain from operating the engine. After about 10 seconds, the steering lock motor
will resume functioning.
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately.
■If the electronic key battery is depleted
 P. 6 4 2
CAUTION
■When starting the engine
Always start the engine while sitting in th e driver’s seat. Do not depress the acceler-
ator pedal while starting the engine under any circumstances. 
Doing so may cause an accident resu lting in death or serious injury.
■Caution while driving
If the vehicle begins to slide due to engine failure or other circumstances, do not
lock or open the doors until the vehicle reaches a safe and complete stop. Activa-
tion of the steering lock in this circumstance may lead to an accident, resulting in
death or serious injury.
■Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and
hold the “ENGINE START STOP” switch for more than 3 seconds. 
However, do not touch the "ENGINE START STOP" switch while driving except in
an emergency. Turning the engine off while dr iving will not cause loss of steering or
braking control, but the power assist to thes e systems will be lost. This will make it
more difficult to steer and brake, so you should pull over and stop the vehicle as
soon as it is safe to do so.

403
3-1. Using the air conditioning system and defogger
3
Interior features
GX460_U.S.A. (OM60E69U)
Adjusting the position and opening and closing the air outlets
Roof side outlets Direct air flow to the left or right,
up or down.
Turn the knob fully to the back of
the vehicle to close the vent.
■Air conditioning system settings
When the “ENGINE START STOP” switch is turned on, the air conditioning system
settings will be set to thos e that were in use the last time the “ENGINE START
STOP” switch was turned off.
Air conditioning system settings are memori zed individually on each electronic key,
so the settings reproduc ed will be specific to the key that is used.
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the engine
is stopped.

514
3-5. Using the interior lights
GX460_U.S.A. (OM60E69U)
■Illuminated entry system
The lights automatically turn on/off according to “ENGINE START STOP” switch
mode, the presence of the electronic key, whether the doors are locked/unlocked,
and whether the doors are open/closed.
■To prevent battery discharge
If the following lights remain on when the door is not fully closed and the personal/
interior light main switch is in the door position, the lights will go off automatically
after 20 minutes:
●Personal/interior light
●Inside door handle lights
●Footwell lights
●Running board lights
■Customization
Settings (e.g. adjust the time elapsed befo re the interior lights automatically turn
off) can be changed. (Customizable features P. 7 8 1 )

Maintenance and care4
587
GX460_U.S.A. (OM60E69U)
4-1. Maintenance and careCleaning and protecting 
the vehicle exterior............ 588
Cleaning and protecting 
the vehicle interior .............. 592 4-2. Maintenance
Maintenance 
requirements........................ 595
General maintenance ........... 597
Emission inspection and 
maintenance (I/M) 
programs ................................ 601
4-3. Do-it-yourself maintenance Do-it-yourself service 
precautions ........................... 602
Hood .......................................... 607
Engine compartment ........... 608
Tires............................................. 627
Tire inflation pressure........... 634
Wheels ...................................... 638
Air conditioning filter ........... 640
Electronic key battery.......... 642
Checking and replacing 
fuses ........................................ 645
Headlight aim (vehicles with low 
beam halogen bulbs) ......... 658
Light bulbs ................................ 660

623
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60E69U)
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, observe the following before recharging:
●If recharging with the 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 discon-
necting the charger cables to the battery.
■After recharging/reconnecting the battery
●Unlocking the doors using the smart key system may not be possible immedi-
ately after disconnecting the battery. If this happens, use the wireless remote
control or the mechanical key to lock/unlock the doors.
●Start the engine with the “ENGINE START STOP” switch in ACCESSORY
mode. The engine may not start with the “ENGINE START STOP” switch
turned OFF. However, the engine will operate normally from the second
attempt.
●The “ENGINE START STOP” switch mode is recorded by the vehicle. If the bat-
tery is reconnected, the vehicle will return the “ENGINE START STOP” switch
mode to the status it was in before th e battery was disconnected. Make sure to
turn off the engine before disconnect the battery. Take extra care when con-
necting the battery if the “ENGINE START STOP” switch mode prior to dis-
charge is unknown.
If the system will not start even after mult iple attempts, contact your Lexus dealer.