2019 Lexus GX460 key battery

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GX460_OM_OM60Q84U_(U)7-2. Steps to take in an emergency
If the electronic key does not operate properly
Use the mechanical key (
P. 99) 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. 121) 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
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5577-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
7
When trouble arises
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.
If any of the doors is opened or closed
while the key is being touched to the
switch, an alarm will sound to indicate
that the start function cannot detect the
electronic key.
Press the engine switch within 10 seconds of the buzzer sounding, keeping the
brake pedal depressed.
In the event that the engine switch st ill cannot be operated, 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. 489)
■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. 194)
■When the electronic key does not work properly
Make sure that the smart access system with push-button start has not been deactivated
in the customization setting. If it is off, turn the function on.
(Customizable features: P. 592)
Starting the engine
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GX460_OM_OM60Q84U_(U)
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When trouble arises
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. 460)
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.
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5607-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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.
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620What to do if... (Troubleshooting)
GX460_OM_OM60Q84U_(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. 99)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 101)
●Is the electronic key battery weak or depleted? ( P. 489)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (P. 194)
●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. 121)
●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. 105)
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

621What to do if... (Troubleshooting)
GX460_OM_OM60Q84U_(U)
●Did you press the engine switch while firmly depressing the brake pedal?
( P. 193)
●Is the shift lever in P? ( P. 193)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 120)
●Is the steering wheel unlocked? ( P. 196)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (P. 557)
●Is the battery discharged? ( P. 559)
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode ( P. 202)
If you think something is wrong
The engine does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal

625Alphabetical index
GX460_OM_OM60Q84U_(U)
Bottle holders ...........................................413
BrakeFluid...........................................................575
Parking brake...................................... 205
Warning light ........................................ 518
Brake assist ............................................. 355
Break-in tips..............................................163
Brightness control Instrument panel light control .................................................... 88
BSM (Blind Spot Monitor)..................361 The Blind Spot Monitor function ............................................... 366
The Rear Cross Traffic Alert function ............................................... 369
Care ................................................ 444, 447 Aluminum wheels .............................. 444
Exterior.................................................... 444
Interior ..................................................... 447
Seat belts ............................................... 448
Cargo hooks ............................................416
Center differential................................ 346
CD player
*
Chains ........................................................ 381
Child restraint system............................ 55 Booster seats, definition ....................56
Booster seats, installation..................66
Convertible seats, definition ............56
Convertible seats, installation .............................................. 63 Installing child restraint system
with LATCH system.......................... 61
Installing child restraint system with seat belts...................................... 63
Installing child restraint system with top tether strap..........................67
Infant seats, definition.......................... 56
Infant seats, installation....................... 63
Child safety .................................................54 Airbag precautions.............................. 39
Back door precautions........................ 111
Battery precautions ................. 471, 561
Child restraint system......................... 55
Glass hatch precaution ..................... 116
How your child should wear the seat belt ...........................................32
Installing child restraints .................... 59
Moon roof precautions ................... 160
Power window lock switch.............154
Power window precautions ...........156
Rear door child-protectors ........... 105
Removed key battery precautions .......................................490
Seat belt precautions .......................... 33
Seat heater precautions .................403
Child-protectors ....................................105
Cleaning Aluminum wheels .............................. 444
Exterior ................................................... 444
Interior ..................................................... 447
Seat belts................................................ 448
Coat hooks ..............................................432
Compass ................................................. 433
C
*: For vehicles with a navigation system or a multimedia system, refer to the “NAVIGATION SYSTEM OWNER’S MANUAL” or“MULTIMEDIA OWNER’S MANUAL”.

626Alphabetical index
GX460_OM_OM60Q84U_(U)
Condenser .............................................. 467
Console box ............................................ 410
Cool box .................................................. 423
Cooling system ..................................... 465Engine overheating...........................562
Conversation mirror ........................... 426
Crawl Control .......................................350
Cruise control Cruise control...................................... 229
Dynamic radar cruise control...... 232
Cup holders .............................................. 412
Curtain shield airbags ........................... 36
Current fuel consumption .....................91
Customizable features ....................... 592
DAC (Downhill Assist Control system)................................................... 353
Daytime running light system ..........208
Defogger Front windshield .................................394
Outside rear view mirrors ............ 395
Rear window ....................................... 395
Differential ............................................... 573
Dimension ............................................... 568
Display Multi-information display ..................90
Trip information .......................................91
Warning message .............................526
Do-it-yourself maintenance ............. 457
Doors.......................................................... 102 Back door ............................................... 109
Door glasses ......................................... 154
Door lock ................................................ 102
Open door warning light.............. 520
Outside rear view mirrors ................ 151
Rear door child-protector.............. 105 Driver’s seat position memory.......... 139
Driving ........................................................ 162
AVS switch ........................................... 345
Break-in tips ...........................................163
Correct posture .................................... 28
Procedures ............................................. 162
Winter drive tips ................................. 381
Dynamic radar cruise control ..........232
Eco Driving Indicator .............................94
EDR (Event data recorder)................... 10
Electronic key ........................................... 98 Battery-saving function ......................121
If the electronic key does not operate properly ............................556
Replacing the battery ......................489
Emergency, in case of If the electronic key does not operate properly ............................556
If the engine will not start ...............554
If the vehicle has discharged battery ........................559
If the warning buzzer sounds .................................................. 518
If the warning light turns on ........... 518
If you have a flat tire ..........................540
If you lose your keys......................... 620
If you think something is wrong.....................................................516
If your vehicle becomes stuck......................................................565
If your vehicle needs to be towed .................................................... 510
If your vehicle overheats ................ 562
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