key LEXUS LS500 2019 Workshop Manual

432 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 Remove the cover inside the trunk and
pull the lever.If you lose your keys New genuine mechanical keys can
be made by your Lexus dealer using
another mechanical key and the
key number stamped on your key
number plate.
Keep the plate in a safe place such
as your wallet, not in the vehicle. NOTICE■
When an electronic key is lost
If the electronic key remains lost, the risk
of vehicle theft increases significantly.
Visit your Lexus deal er immediately with
all remaining electronic keys and the
card key (if equipped) that were pro-
vided with your vehicle. If the fuel filler door cannot
be opened If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the following procedure
can be used to open the fuel filler
door.
Opening the fuel filler door

4337-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises ■
When the electronic key does not work
properly●
Make sure that the smart access system
with push-button start has not been dis-
abled at your Lexus dealer. If it has been
disabled, re-enable it.●
Check if battery-saving mode is set. If it is
set, cancel the function. (  P.113)
■
Unlocking the door
Use the mechanical key (  P.98) in
order to perform the following opera-
tions: 1 Pull the driver’s door handle and
insert the mechanical key.
2 Unlock the door.
3 Remove the key, return the handle,
and then pull the handle again. ■
Locking the door
1 With the door open, push down the
inside lock button.
2 Close the door. ■
Trunk
Turn the mechanical key clockwise to
open. (  P.65)If the electronic key does not
operate properly If communication between the
electronic key and vehicle is inter-
rupted (  P.113) or the electronic
key cannot 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 and trunk can be opened and
the engine can be started by follow-
ing the procedure below.
NOTICE■
In case of a smart access system with
push-button start malfunction or
other key-related problems
Take your vehicle with all the electronic
keys provided with your vehicle to your
Lexus dealer.
Locking and unlocking the
doors, unlocking the trunk

434 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 ■
Key linked functions
1 Closes the windows and the moon
roof *
or panoramic moon roof *

(turn and hold)
2 Opens the windows and the moon
roof *
or panoramic moon roof *

(turn and hold)These settings must be customized at your
Lexus dealer. *
:If equipped 1 Depress the brake pedal.
2 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 custom-
ization setting, the engine switch will turn
to ACCESSORY mode.
3 Firmly depress the brake pedal and
check that is shown on the
multi-information display.
4 Press the engine switch.
In the event that the engine still cannot
be started, contact your Lexus dealer. ■
Stopping the engine
Set the parking brake, shift the shift position
to P and press the engine switch as you nor-
mally do when stop ping the engine.
■
Electronic 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.399)
■
Changing engine switch modes
Release the brake pe dal and press the
engine switch in step 3 above. The engine
does not start and modes will be changed
each time the switch is pressed. (  P.166)WARNING
■
When using the mechanical key and
operating the power windows or the
moon roof or panoramic moon roof
Operate the power window or the moon
roof or panoramic moon roof after
checking to make sure that there is no
possibility of any passe nger having any of
their body parts caught in the window or
the moon roof or panoramic moon roof.
Also, do not allow ch ildren to operate the
mechanical key. It is possible for children
and other passengers to get caught in
the power window or the moon roof or
panoramic moon roof. Starting the engine

4357-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises 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. 
Method connecting jumper (or
booster) cables to the battery
1 Confirm that the electronic key is
being carried. When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
(  P.66)
2 Open the trunk lid and remove the
luggage mat. (  P.340)In the event that the trunk opener cannot
be used, use the mechanical key to open
the trunk. (  P.433)
3 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Negative (-) battery terminal (your vehicle)If the vehicle battery is dis-
charged The following procedures may be
used to start the engine if the vehi-
cle’s battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the engine
A
B
C
D
A
B
C
D

436 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 4 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
5 Open and close any of the doors of
your vehicle with the engine switch
off.
6 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
7 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected. 
Method connecting jumper (or
booster) cables to the exclusive
jump starting terminal
1 Confirm that the electronic key is
being carried.When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
(  P.66) 2 Open the hood. Remove the pas-
senger side engine compartment
cover. (  P.371, 374)
3 Remove the service
cover.(  P.375)
4 Open the fuse box cover. Push the tab in and lift the lid off.
5 Open the exclusive jump starting
terminal cover.
6 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then, A
B

438 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 low speed for an extended period, such
as in heavy traffic.■
When the battery is removed or dis-
charged●
Information stored in the ECU is cleared.
When the battery is depleted, have the
vehicle inspected at your Lexus dealer.●
Some systems may require initialization.
(  P.481)■
When removing the battery terminals
When the battery terminals are removed,
the information stored in the ECU is
cleared. Before removi ng the battery termi-
nals, contact your Lexus dealer. ■
Charging the battery
The electricity stored in the battery will dis-
charge gradually even when the vehicle is
not in use, due to natural discharge and the
draining effects of certain electrical appli-
ances. 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 bat-
tery●
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 di sconnecting the bat-
tery, turn the engine switch off.
If you are unsure what mode the engine
switch was in befo re the battery dis-
charged, be especially careful when
reconnecting the battery.
■
When replacing the battery
●
Use a Central Degassing type battery
(European Regulations). ●
Use a battery with the same case size as
the previous battery and an equivalent
20 hour rate capacity (20HR) or greater.
• If the sizes differ, the battery cannot be
properly secured.
• If the 20 hour rate capacity is low, even if
the time period where the vehicle is not
used is a short time, the battery may dis-
charge and the engine may not be able to
start. ●
Use a battery with a handle. If a battery
without a handle is used, removal is more
difficult. ●
After replacing, firm ly attach the follow-
ing items to the exhaust hole of the bat-
tery.
• Use the exhaust hose that was attached
to the battery before replacing and con-
firm that it is firmly connected to the hole
section of the vehicle.
• Use the exhaust hole plug included with
the battery replaced or the one installed
on the battery prior to the replacement.
(Depending on the battery to be
replaced, the exhaust hole may be
plugged.)
Exhaust hole plug
Exhaust hole
Exhaust hose
For details, consult your Lexus dealer. A
B
C

4698-2. Customization
LS500_OM_(U)_1810 8
Vehicle specifications *
:If equipped ■
Door lock (  P.100, 104, 433)Route guidance to destina-
tion/street name *
On Off — O — —
Driving support system dis-
play On Off — O — —
Compass *
On Off — O — —
Audio system operation sta-
tus On Off — O — —
Function Default setting Customized set-
ting
Unlocking using a mechani-
cal key Driver’s door
unlocked in one
step, all doors
unlocked in two
step All doors
unlocked in one
step — — — O
Automatic door locking func-
tion Shift position
linked door lock-
ing operation Off
O — — OSpeed linked
door locking
operation
Automatic door unlocking
function Shift position
linked door
unlocking opera-
tion Off
O — — ODriver’s door
linked door
unlocking opera-
tion
Locking/unlocking of the
trunk when all doors are
locked/unlocked On Off — — — OFunction Default setting Customized set-
ting A B C D
A B C D

4738-2. Customization
LS500_OM_(U)_1810 8
Vehicle specifications ■
Power windows, and moon roof *
or panoramic moon roof *
(  P.142, 145, 147)*
:If equipped ■
Reverse warning buzzer (  P.168)
■
Automatic light control system (  P.179)
■
Lights (  P.179) Function Default setting Customized set-
ting
Mechanical key linked opera-
tion Off On — — — O
Wireless remote control
linked operation Off On (open only) — — — O
Wireless remote control
linked operation signal
(buzzer) On Off — — — O
Function Default setting Customized set-
ting
Signal (buzzer) when the shift
position is in R Single Intermittent — — — O
Function Default setting Customized set-
ting
Light sensor sensitivity Standard -2 to 2 O — — O
Time elapsed before head-
lights automatically turn off
after doors are closed 30 seconds Off
O — — O60 seconds
90 seconds
Windshield wiper linked
headlight illumination On Off — — — O
Function Default setting Customized set-
ting
Daytime running lights On
Off *1
O — — O
Welcome lighting On Off — — — O
AFS (Adaptive Front-lighting
System) *2
On Off — — — O A B C D
A B C D
A B C D
A B C D

4798-2. Customization
LS500_OM_(U)_1810 8
Vehicle specifications ■
Illumination (  P.331)
■
Vehicle customization
●
When the smart access system with
push-button start is off, the entry unlock
function cannot be customized. ●
When the doors remain closed after
unlocking the doors and the timer acti-
vated automatic door lock function acti-
vates, signals will be generated in
accordance with the operation buzzer
volume and operational signal (Emer-Function Default setting Customized set-
ting
Time elapsed before the inte-
rior lights turn off 15 seconds Off
O — — O7.5 seconds
30 seconds
Operation after the engine
switch is turned off On Off — — — O
Operation when the doors
are unlocked On Off — — — O
Operation when you
approach the vehicle with the
electronic key on your person On Off — — — O
Footwell lights On Off — — — O
Instrument panel ornament
light and door trim ornament
lights On Off — — — O
Time elapsed before the outer
foot lights turn off 15 seconds Off
O — — O7.5 seconds
30 seconds
Operation of the outer foot
lights when you approach the
vehicle with the electronic
key on your person On Off — — — O
Operation of the outer foot
lights when the doors are
unlocked On Off — — — O
Operation of the outer foot
lights when a door is opened On Off — — — O
Fading out of the outer foot
lights when they turn off Long Short — — — O A B C D

494 What to do if... (Troubleshooting)
LS500_OM_(U)_1810 1-1.What to do if... (Troubleshooting)
What to do if... (Troubleshooting)  If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
(  P.432)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. (  P.432)
 Is the electronic key battery weak or
depleted? (  P.399)
 Is the engine switch in IGNITION
ON mode? When locking the doors, turn the engine
switch off. ( 
P.166 )
 Is the electronic key left inside the
vehicle? When locking the doors, make sure that
you have the electronic key on your per-
son.  The function may not operate prop-
erly due to the condition of the radio
wave. (  P.113)
 Is the child-protector lock set? The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( 
P.103 )
 The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. (  P.109)
 Did you press the engine switch
while firmly depressing the brake
pedal? (  P.164)
 Is the electronic key anywhere
detectable inside the vehicle?
(  P.112)
 Is the steering wheel unlocked?
(  P.164)
 Is the electronic key battery weak or
depleted?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 electronic key does not
operate properly
The doors cannot be locked or
unlocked The rear door cannot be opened
The trunk lid is closed with the
electronic key left inside
If you think something is wrong The engine does not start