2021 Lexus GX460 key battery

GX460_OM_OM60T19U_(U)
4936-3. Do-it-yourself maintenance
6
Maintenance and care
■Use a CR2032 lithium battery
●Batteries can be purchased at your Lexus dealer, loca l 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 rang e will be reduced.
WARNING
■Battery precautions
Observe the following precautions.
Failure to do so may result in death or serious injury.
●Do not swallow the battery. Doing so may cause chemical burns.
●A coin battery or button battery is used in the electronic key. If a battery is swallowed,
it may cause severe chemical burns in as li ttle as 2 hours and may result in death or
serious injury.
●Keep away new and remove d batteries from children.
●If the cover cannot be firmly closed, stop using the electronic key and stow the key in
the place where children cannot reach, and then contact your Lexus dealer.
●If you accidentally swallow a battery or put a battery into a part of your body, get
emergency medical attention immediately.
■To prevent battery explosion or leakage of flammable liquid or gas
●Replace the battery with a new battery of the same type. If a wrong type of battery is
used, it may explode.
●Do not expose batteries to extremely low pressure due to high altitude or extremely
high temperatures.
●Do not burn, break or cut a battery.
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.

507
GX460_OM_OM60T19U_(U)
7When trouble arises
7-1. Essential informationEmergency flashers ................. 508
If your vehicle has to be stopped in
an emergency ..........................509
If the vehicle is trapped in rising water ................................. 510
7-2. Steps to take in an emergency If your vehicle needs to be towed................................... 511
If you think something is wrong ............................................ 516
Fuel pump shut off system ........517
If a warning light turns on or a warning buzzer
sounds........................................... 518
If a warning message is displayed..................................... 527
If you have a flat tire ................... 531
If the engine will not start ........545
If the electronic key does not operate properly ............. 547
If the vehicle battery is discharged ................................ 550
If your vehicle overheats .........553
If the vehicle becomes stuck .............................................556

547
GX460_OM_OM60T19U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If the electronic key does not operate properly
Use the mechanical key (P. 105) in
order to perform the following opera-
tions (driver’s door only):
Locks all the doors
Closes the windows and moon roof
*
(turn and hold)
Unlocks the doors
Turning the key rearward unlocks the
driver’s door. Turning the key once again
unlocks the other doors.
Opens the windows and moon roof* (turn and hold)
*: These settings must be cust omized at your Lexus dealer.
If communication between the electronic key and vehicle is interrupted
( P. 127) or the electronic key ca nnot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors can be opened and
the engine can be started by following the procedure below.
Locking and unlocking the doors and key linked functions
1
2
3
4

5487-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the engine switch.
When the electronic key is detected, a
buzzer sounds and the engine switch
will turn to IGNITION ON mode.
When the smart access system with
push-button start is deactivated in cus-
tomization setting, the engine switch will
turn to ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
Press the engine switch shortly and firmly.
In the event that the engine still cannot be started, contact your Lexus dealer.
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when stopping
the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( P. 492)
■Changing engine switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and press the engine
switch.
The engine does not start and modes will be changed each time the switch is pressed.
(  P. 201)
■When the electronic key does not work properly
●Make sure that the smart access system wi th push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features:  P. 584)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 127)
Starting the engine
1
2
3
4

550
GX460_OM_OM60T19U_(U)7-2. Steps to take in an emergency
If the vehicle battery is discharged
If you have a set of jumper (or booster)
cables and a second vehicle with a 12-volt
battery, you can jump start your Lexus by following the steps below.
Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depe nding on the situa-
tion, the alarm may activate and the
doors locked. ( P. 80)
Open the hood. ( P. 458)
Connecting the jumper cables accord ing to the following procedure:
Positive (+) battery terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Connect the jumper cable to ground on your vehicle as shown in the illus-
tration.
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can call your Lexus dealer , or qualified repair shop.
1
2
3
1
2
3
4

5517-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximatel y 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once your vehicle’s engine has started, remove the jumper cables in the exact
reverse order in which they were connected.
Once the engine starts, have the vehicle checked at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine 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 battery
The electricity stored in the battery will disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off. If you are unsure what
mode the engine switch was in before the battery discharged, be especially careful
when reconnecting the battery.
4
5
6
7

592
GX460_OM_OM60T19U_(U)8-2. Customization
■Intuitive parking assist* (P. 270)
*: If equipped
■Alarm (P. 79)
*: The default setting varies according to country.
■In the following situations, customize mode will automatically be turned off.
●A warning message appears after the cu
stomize mode screen is displayed.
●The engine switch is turned to OFF.
●The vehicle begins to move while the customize mode screen is displayed.
FunctionDefault settingCustomized
setting
Intuitive parking assistOnOffO——
Buzzer volumeLevel 3Level 1 to 5—OO
Display settingAll sensors displayedDisplay off—OO
Detection distance of the
front center sensorFarNear—OO
Detection distance of the
rear center sensorFarNear—OO
123
FunctionDefault settingCustomized setting
Deactivates the alarm when
the doors are unlocked
using the mechanical key
*
OnOff––O
123
WARNING
■During customization
As the engine needs to be running during customization, ensure that the vehicle is
parked in a place with adequate ventilation. In a closed area such as a garage, exhaust
gases including harmful carbon monoxide (CO) may collect and enter the vehicle. This
may lead to death or a serious health hazard.
NOTICE
■During customization
To prevent battery discharge, ensure that the engine is running while customizing fea-
tures.

610What to do if... (Troubleshooting)
GX460_OM_OM60T19U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. ( P. 105)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 107)
●Is the electronic key battery weak or depleted? ( P. 492)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (P. 201)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
( P. 127)
●Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( P. 111)
If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened