2015 Lexus GS350 key battery

428
GS350_OM_OM30E15U_(U)
6-3. Do-it-yourself maintenance
■Use a CR2032 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 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 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.

459
GS350_OM_OM30E15U_(U)
When trouble arises7
7-1. Essential information Emergency flashers ..................460
If your vehicle has to be stopped in an emergency ......461
7-2. Steps to take in an emergency If your vehicle needs to be towed ................................ 462
If you think something is wrong ................468
Fuel pump shut off system ...... 469
If a warning light turns on or a warning buzzer sounds ..... 470
If a warning message is displayed ............................... 480
If you have a flat tire...................504
If the engine will not start ..........517
If the shift lever cannot be shifted from P ...................... 519
If the parking brake cannot be released ................................ 520
If the electronic key does not operate properly ..................... 522
If the vehicle battery is discharged ............................. 525
If your vehicle overheats ......... 529
If the vehicle becomes stuck ............................................. 532

5017-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
7
When trouble arises
InteriorbuzzerExterior
buzzerWa r n i n g m e s s a g eDetailsCorrection procedure

Power was turned
off due to the auto-
matic power off
function.
Next time
when start-
ing the
engine,
increase the
engine
speed
slightly and
maintain
that level for
approxi-
mately 5
minutes to
recharge
the battery.
OnceThe electronic key
has a low battery.
Replace the
electronic
key batter y.
(  P. 4 2 7 )

517
GS350_OM_OM30E15U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If the engine will not start
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again foll owing correct starting procedures.
( P. 177)
●There may be a malfunction in the engine immobilizer system.
( P. 7 0 )
One of the following may be the cause of the problem:
●The battery may be discharged. ( P. 525)
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an electrical
problem such as electronic key ba ttery depletion or a blown fuse. How-
ever, an interim measure is available to start the engine. ( P. 5 1 8 )
If the engine will not start even though correct starting procedures are
being followed ( P. 177), consider each of the following points:
The engine will not start even though the starter motor operates
normally.
The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
The starter motor does not turn over

5247-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when stop-
ping the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec-
tronic key battery be replaced immediately when the battery is depleted. ( P. 4 2 7 )
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is
pressed.( P. 1 7 8 )
■When the electronic key does not work properly
●Make sure that the smart access system with push-button start has not been deac-
tivated in the customization setting. If it is off, turn the function on.
(Customizable features:  P. 5 6 1 )
●Check if battery-saving mode is set. If it is set, cancel the function. ( P. 113)
CAUTION
■When using the mechanical key and operating the power windows and moon
roof
Operate the power window or moon roof af ter checking to make sure that there is
no possibility of any passenger having any of their body parts caught in the window
or moon roof.
Also, do not allow children to operate the mechanical key. It is possible for children
and other passengers to get caught in power window and moon roof.
3

5277-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
7
When trouble arises
■When recharging or replacing the battery
●Make sure that the key is not inside the vehicle when recharging or replacing the
battery. The key may be locked in the vehicle if the alarm is activated. ( P. 7 3 )
●In some cases, it may not be possible to unlock 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 dis-
charged. Before disconnecting the ba ttery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery dis-
charged, be especially careful when reconnecting the battery.
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prev ent accidentally igniting the flammable
gas that may be emi tted from the battery:
●Make sure each jumper cable is connected to the correct terminal and that it is
not unintentionally in contact with any other than the intended terminal.
●Do not allow the other end of the jumper cable connected to the “+” terminal to
come into contact with any other parts or metal surfaces in the area, such as
brackets or unpainted metal.
●Do not allow the + and - clamps of the jumper cables to come into contact with
each other.
●Do not smoke, use matches, cigarette lighters or allow open flame near the bat-
tery.

590What to do if... (Troubleshooting)
GS350_OM_OM30E15U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new 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. 1 0 6 )
●Is the electronic key battery weak or depleted? ( P. 4 2 7 )
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 1 7 8 )
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the elec-
tronic key on your person.
●The function may not operate properly due to the condition of
the radio wave. ( P. 1 1 4 )
If you have a problem, check the following 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

592What to do if... (Troubleshooting)
GS350_OM_OM30E15U_(U)
●Did you press the engine switch while firmly depressing the
brake pedal? (P. 177)
●Is the shift lever in P? ( P. 180)
●Is the electronic key anywhere detectable inside the vehicle?
( P. 110)
●Is the steering wheel unlocked? ( P. 181)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way.
( P. 523)
●Is the battery discharged? ( P. 525)
●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. 5 1 9 )
●It is locked automatically to prevent theft of the vehicle.
(P. 180)
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
The steering wheel cannot be turned after the engine is stopped