key Lexus GS350 2019 Workshop Manual

4707-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
InteriorbuzzerExteriorbuzzerWarning messageDetails/Actions
Once
The electronic key is not detected
when an attempt is made to start the
engine.
 Start the engine with the elec-
tronic key present.
Once3 times
The electronic key was carried out-
side the vehicle and a door other
than the driver’s door was opened
and closed while the engine switch
was in a mode other than off.
Bring the electronic key back
into the vehicle.
The driver’s door was opened and
closed while the electronic key was
not in the vehicle, the shift lever was
in P and the engine switch was not
turned off.
Turn the engine switch off or
bring the electronic key back
into the vehicle.
OnceCon-
tinuous
An attempt was made to exit the
vehicle with the electronic key and
lock the doors without first turning
the engine switch off when the shift
lever was in P.
Turn the engine switch off and
lock the doors again.
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(Displayed alternately)
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4717-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
7
When trouble arises
9 times
An attempt was made to drive when
the regular key was not inside the
vehicle.
 Confirm that the electronic key
is inside the vehicle.
Con-
tinuous
The driver’s door was opened when
the shift lever was not in P and the
engine switch was not turned off.
 Shift the shift lever to P.
Con-
tinuousCon-
tinuous
The driver’s door was opened and
closed while the electronic key was
not in the vehicle, the shift lever was
not in P and the engine switch was
not turned off.
Shift the shift lever to P.
 Bring the electronic key back
into the vehicle.
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Displayed alternately)
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4727-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
Con-
tinuous
• An attempt was made to lock thedoors using the sm art access sys-
tem with push-button start while
the electronic key was still inside
the vehicle.
• An attempt was made to lock either front door by opening a
door and putting the inside lock
button into the lock position, then
closing the door with the elec-
tronic key still inside the vehicle.
 Retrieve the electronic key
from the vehicle and lock the
doors again.
Once
• When the doors were unlocked
with the mechanical key and then
the engine swit ch 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.
Once
An attempt was made to start the
engine with the shift lever in an
incorrect position.
Shift the shift lever to P and start
the engine.

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.
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)

4737-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
7
When trouble arises
Once
The electronic key has a low battery.
 Replace the electronic key bat-
tery. ( P. 412)
Once
The driver’s door was opened and
closed with the engine switch turned
off and then the engine switch was
put in ACCESSORY mode twice
without the engine being started.
 Press the engine switch while
depressing the brake pedal.
During an engine starting proce-
dure in the event that the electronic
key was not functioning properly
( P. 505), the engine switch was
touched with the electronic key.
 Press the engine switch within
10 seconds of the buzzer sound-
ing.
Once
The steering lock could not be
released within 3 seconds of the
engine switch being pressed.
Press the engine switch while
depressing the brake pedal and
moving the steering wheel left
and right.
Once
The engine switch has been turned
off with the shift lever in a position
other than P or N.
Shift the shift lever to P.
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(GS350/GS300)
(GS F)
(Flashes)
(Flashes)

500
GS350_300_OM_OM30G96U_(U)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 follo
wing correct starting procedures.
( P. 203)
●There may be a malfunction in th e engine immobilizer system. (P. 77)
One of the following may be the cause of the problem:
●The battery may be discharged. ( P. 507)
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletio n or a blown fuse. However, an interim
measure is available to start the engine. ( P. 501)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. ( P. 507)
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
If the engine will not start even though correct starting procedures are being
followed (P. 203), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over
The starter motor does not turn over, the interior lights and headlights
do not turn on, or the horn does not sound.

504
GS350_300_OM_OM30G96U_(U)7-2. Steps to take in an emergency
If the electronic key does not operate properly
■Doors
Use the mechanical key (
P. 139)
in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof
* (turn and hold)
Unlocks the door
Turning the key rearward unlocks the
driver’s door. Turning the key once
again within 5 seconds unlocks the
other doors.
Opens the windows and moon roof* (turn and hold)
*: This setting must be custom ized at your Lexus dealer.
■Trunk
Turn the mechanical key clockwise
to open.
If communication between the electronic key and vehicle is interrupted
( P. 158) 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 su ch cases, the doors and trunk can be
opened and the engine can be started by following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key linked
functions
1
2
3
4

5057-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(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.
When the electronic key is detected, a buzze r sounds and the engine switch will turn
to IGNITION ON mode.
When the smart access system with push-button start is deactivated in customization
setting, the engine switch w ill turn to ACCESSORY mode.
Firmly depress the brake pedal and check that and a message (GS F
only) are shown on the multi-information display.
Press the engine switch.
In the event that the engine still cannot be started, contact your Lexus dealer.
Starting the engine
1
2
GS350/GS300GS F
3
4

5067-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
■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. 412)
■Alarm
If the trunk is opened using the mechanical key when the alarm system is set, the alarm
may be triggered. ( P. 79)
■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. 204)
■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. 549)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 157)
WARNING
■When using the mechanical key and operating the power windows or moon roof
Operate the power window or moon roof afte r 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 op erate the mechanical key. It is possible for children and
other passengers to get caught in the power window or moon roof.
3

507
GS350_300_OM_OM30G96U_(U)
7
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 vehicle by following the steps below.
Confirm that the electron ic key is being carried.
When connecting the jumper (or booster) cables, depending on the situation, the
alarm may activate and doors locked. ( P. 80)
Open the hood. ( P. 375)
GS300/GS F: Remove the engine cover.
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call your Lexus deal er or a qualified repair shop.
1
GS350/GS300GS F
2
3
GS300GS F
Raise the front of the engine cover to
remove the front clips, and then raise
the rear of the engine cover to
remove the rear clips.

5107-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
■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.