2016 Lexus GX460 key battery

3925-1. Using the air conditioning system and defogger
GX460_OM_OM60M73U_(U)
■Registering air conditioning settings to electronic keys
●Unlocking the vehicle using an electronic key and turning the engine switch to
IGNITION ON mode will recall that key’s registered air conditioning settings.
●When the engine switch is turned off, the current air conditioning settings will automat-
ically be registered to the electronic key that was used to unlock the vehicle.
The system may not operate correctly if more th an one electronic key is in the vicinity or
if the smart access system with push-button start is used to unlock a passenger door.
Settings for the electronic key and the corresponding door can be changed.
Contact your Lexus dealer.
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the engine is
off.

398
GX460_OM_OM60M73U_(U)5-2. Using the interior lights
■Illuminated entry system
The lights automatically turn on/off according to engine 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 engine
switch is turned off the lights will go off
automatically after 20 minutes:
●Pe r s o n a l /i n t e r i o r l i g h t
●Inside door handle lights
●Footwell lights
●Running board lights
■Customization
Settings (e.g. adjust the time elapsed before the interior light s automatically turn off) can
be changed. (Customizable features: P. 5 8 6 )
Personal/interior lights
FrontRear
Turns the lights on/off Turns the lights on/off
NOTICE
To prevent battery discharge, do not leave the lights on longer than necessary when the
engine is not running.

437
GX460_OM_OM60M73U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior.................438
Cleaning and protecting the vehicle interior ....................441
6-2. Maintenance Maintenance requirements............................. 444
General maintena nce .............. 447
Emission inspection and maintenance (I/M)
programs .................................... 450
6-3. Do-it-yourself maintenance Do-it-yourself service precautions ..................................451
Hood ............................................... 454
Engine compartment ............... 455
Tires ..................................................468
Tire inflation pressure ................ 476
Wheels .......................................... 480
Air conditioning filter ............... 482
Electronic key battery ..............484
Checking and replacing fuses ..............................................486
Headlight aim ..............................489
Light bulbs...................................... 491

GX460_OM_OM60M73U_(U)
4656-3. Do-it-yourself maintenance
6
Maintenance and care
■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 disconnecting
the charger cables to the battery.
■After recharging/reconnecting the battery
The engine 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 engine.
●Unlocking the doors using the smart access system with push-button start may not be
possible immediately after reconnecting 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 switch in ACCESSORY mode. The engine may not
start with the engine switch turned off. However, the engine will operate normally from
the second attempt.
●The engine switch mode is recorded by the vehicle. If the battery is reconnected, the
vehicle will return the engine switch mode to the status it was in before the battery was
disconnected. Make sure to turn off the en gine before disconnect the battery. Take
extra care when connecting the battery if the engine switch mode prior to discharge is
unknown.
If the system will not start even after mult iple attempts, contact your Lexus dealer.
CAUTION
■Chemicals in the battery
Batteries contain 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 battery:
●Do not cause sparks by touching the battery terminals with tools.
●Do not smoke or light a match near the battery.
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the battery.
●Keep children away from the battery.
■Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a garage or
closed room where there is not sufficient ventilation.
1
2
3

484
GX460_OM_OM60M73U_(U)6-3. Do-it-yourself maintenance
Electronic key battery
●Flathead screwdriver
●Small Phillips-head 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 the following items:
Replacing the battery
1
2
3

GX460_OM_OM60M73U_(U)
4856-3. Do-it-yourself maintenance
6
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.
■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.
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 could result in death or serious injury.
NOTICE
■For normal operation afte r 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.

501
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7When trouble arises
7-1. Essential informationEmergency flashers ..................502
If your vehicle has to be stopped in
an emergency...........................503
7-2. Steps to take in an emergency If your vehicle needs to be towed ................................504
If you think something is wrong ............................................ 510
Fuel pump shut off system ......... 511
If a warning light turns on or a warning buzzer
sounds........................................... 512
If a warning message is displayed..................................... 520
If you have a flat tire...................534
If the engine will not start ........ 547
If the shift lever cannot be shifted from P............................ 549
If the electronic key does not operate properly .............550
If the vehicle battery is discharged ................................. 553
If your vehicle overheats ......... 556
If the vehicle becomes stuck ............................................. 559

5317-2. Steps to take in an emergency
GX460_OM_OM60M73U_(U)
7
When trouble arises
Once
• When the doors were unlocked with the mechanical key and then
the engine 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 engine switch was pressed
two consecutive times.
 Touch the electronic key to the
engine switch while depressing
the brake pedal.

Power was turned off due to the
automatic power off function.
Next time when starting the
engine, increase the engine
speed slightly and maintain that
level for approximately 5 min-
utes to recharge the battery.
Once
The electronic key has a low battery.
Replace the electronic key bat-
tery. ( P. 484)
Interior
buzzerExteriorbuzzerWa r n i n g m e s s a g eDetails/Actions
(Flashes)