2021 LEXUS LS500 alarm

1143-2. Opening, closing and locking the doors and trunk
■Effective range (areas within which the
electronic key is detected)When locking or unlocking the doors
The system can be operated when the
electronic key is within about 2.3 ft. (0.7 m)
of an outside door handle. (Only the doors
detecting the key can be operated.)
When opening the trunk
The system can be operated when the
electronic key is within about 2.3 ft. (0.7 m)
of the trunk release button.
When starting the engine or changing
engine switch modes
The system can be operated when the
electronic key is inside the vehicle.
■Alarms and warning messages
An alarm sounds and warning messages
are displayed on the multi-information dis-
play to protect against unexpected acci-
dents or theft of the vehicle resulting from
erroneous operation. When a warning mes-
sage is displayed, take appropriate mea-
sures based on the displayed message.
(  P.436)
When only an alarm sounds, circumstances
and correction procedures are as follows.
●When an exterior alarm sounds once for
5 seconds
●When an interior alarm sounds continu-
ously
■If “Key Detected in Vehicle” is shown on
the multi-information display
An attempt was made to lock the doors
using the smart access system with
push-button start while the electronic key
was still inside the vehicle. Retrieve the elec-
tronic key from the vehicle and lock the
doors again.
■Battery-saving function
The battery-saving function will be acti-
vated in order to prevent the electronic key
battery and the battery from being dis-
charged while the vehicle is not in operation
for a long time.
●In the following situations, the smart
access system with pu sh-button start may
A
B
C
SituationCorrection
procedure
An attempt was made to lock the vehicle while a door was open.Close all of the doors and lock the doors again.
The trunk was closed
while the electronic key was still inside the trunk and all the doors were locked.Retrieve the
electronic key
from the trunk and close the trunk lid.
SituationCorrection procedure
The engine switch was
turned to ACCESSORY mode while the driver’s door was open (The
driver’s door was opened when the engine switch was in ACCESSORY mode).
Turn the engine switch off and close the
driver’s door.
The engine switch was turned off while the
driver’s door was open.Close the
driver’s door.

1163-2. Opening, closing and locking the doors and trunk
engine is started or engine switch modes
are changed.
●Do not leave the electronic key on top of
the instrument panel or near the door
pockets when exiting the vehicle.
Depending on the radio wave reception
conditions, it may be detected by the
antenna outside the cabin and the doors
will become lockable from the outside,
possibly trapping the electronic key
inside the vehicle.
●As long as the electron ic key is within the
effective range, the doors may be locked
or unlocked by anyone. However, only
the doors detecting the electronic key
can be used to unlock the vehicle.
●Even if the electronic key is not inside the
vehicle, it may be possible to start the
engine if the electronic key is near the
window.
●The doors may unlock or lock if a large
amount of water spla shes on the door
handle, such as in the rain or in a car
wash, when the electronic key is within
the effective range. (The doors will auto-
matically be locked after approximately
60 seconds if the d oors are not opened
and closed.)
●If the wireless remote control is used to
lock the doors when the electronic key is
near the vehicle, there is a possibility that
the door may not be unlocked by the
entry function. (Use the wireless remote
control to unlock the doors.)
●Touching the door lock sensor while
wearing gloves may delay or prevent lock
operation.
●When the lock operation is performed
using the lock sensor, recognition signals
will be shown up to two consecutive
times. After this, no recognition signals
will be given.
●If the door handle becomes wet while the
electronic key is within the effective
range, the door may lock and unlock
repeatedly. In this case, follow the follow-
ing correction procedures to wash the
vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle.
(Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart access system
with push-button start. ( P.115)
●If the electronic key is inside the vehicle
and a door handle becomes wet during a
car wash, a message may be shown on
the multi-information display and a
buzzer will sound outside the vehicle. To
turn off the alarm, lock all the doors.
●The lock sensor may not work properly if
it comes into contact with ice, snow, mud,
etc. Clean the lock sensor and attempt to
operate it again.
●A sudden approach to the effective
range or door handle may prevent the
doors from being unlocked. In this case,
return the door handle to the original
position and check that the doors unlock
before pulling the door handle again.
●If there is another electronic key in the
detection area, it may take slightly longer
to unlock the doors after the door handle
is gripped.
■When the vehicle is not driven for
extended periods
●To prevent theft of the vehicle, do not
leave the electronic key within 6 ft. (2 m)
of the vehicle.
●The smart access system with push-but-
ton start can be deactivated in advance.
●Setting the electronic key to battery-sav-
ing mode helps to reduce key battery
depletion. ( P.115)
■To operate the system properly
●Make sure to carry the electronic key
when operating the system. Do not get
the electronic key too close to the vehicle
when operating the system from the out-
side of the vehicle.
Depending on the position and holding
condition of the electr onic key, the key may
not be detected correctly and the system
may not operate properly. (The alarm may
go off accidentally, or the door lock pre-
vention function may not operate.)
●Do not leave the electr onic key inside the
trunk.

4437-2. Steps to take in an emergency
7
When trouble arises
■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 stopping 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.410)
■Alarm (for Canada)
If a door or trunk is unlocked using the
mechanical key when the alarm system is
set, the alarm may be triggered. ( P.66)
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

4447-2. Steps to take in an emergency
■Changing engine switch modes
Release the brake pedal 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.177)
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.67)
2 Open the trunk lid and remove the
luggage mat. ( P.349)
In the event that the trunk opener cannot
be used, use the mechanical key to open
the trunk. (P.442)
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

4457-2. Steps to take in an emergency
7
When trouble arises
3Connect 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)
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.67)
2 Open the hood. Remove the ser-
vice cover. ( P.381, 385)
3 Open the fuse box cover.
A
B
C
D
A
B
C
D

505What to do if... (Troubleshooting)
In this case, the engine can be started in a
temporary way. (P.443)
Is the battery discharged?
( P.444)
 It is locked automatically to prevent
theft of the vehicle. ( P.174)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.155)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY mode for a period of
time. ( P.177)
 The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( P.430)
 The parking brake indicator is on
Is the parking brake released? ( P.186)
Depending on the situation, other
types of warning buzzer may also sound. (
P.427, 436)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.66)
Do one of the following to deactivate
or stop the alarms:
 Except for Canada: Unlock the
doors.
 Except for Canada: Open the trunk.
 For Canada: Unlock the doors or
open the trunk using the entry func-
tion or wireless remote control.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine. (The alarm will be
deactivated or stopped after a few
seconds.)
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( P.436)
 When a warning light turns on or a
warning message is displayed, refer
to P.427, 436.
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed

507Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ...............................409
Front automatic air conditioning system......................................................................... 323
Front seat concentr ated airflow mode
(S-FLOW).................................................330
Micro dust and pollen filter...................330
Rear automatic air conditioning system ......................................................................... 333
ABS (Anti-lock Brake System).............. 304 Warning light ............................................... 429
Active stabilizer suspension system .... 304
Adaptive Front-lighting System (AFS) .192
Adaptive Variable Suspension System304
AFS (Adaptive Front-lighting System) .192
AHB (Automatic High Beam) .................193
Air conditioning filter ................................. 409
Air conditioning system Air conditioning filter ...............................409
Front automatic air conditioning system......................................................................... 323
Front seat concentr ated airflow mode
(S-FLOW).................................................330
Micro dust and pollen filter...................330
Rear automatic air conditioning system ......................................................................... 333
Airbags Airbag operating conditions..................... 31
Airbag precautions for your child ........ 34
Correct driving posture .............................23
Curtain shield airbag operating condi- tions ...................................................................32
Curtain shield airbag precautions ....... 34
Front passenger occupant classification system ............................................................. 40
General airbag precautions ................... 34
Locations of airbags.................................... 29
Modification and disposal of airbags . 36
Side airbag operating conditions ..........32
Side airbag precautions ............................ 34 Side and curtain shie
ld airbags operating
conditions ...................................................... 32
Side and curtain shield airbags precau- tions .................................................................. 34
SRS airbags...................................................... 29
SRS warning light.......................................428
Alarm ................................................................... 66 Warning buzzer ......................................... 427
Anchor brackets ..................................... 46, 55
Antennas (smart acc ess system with
push-button start)........................................ 113
Anti-lock Brake System (ABS).............. 304 Warning light ............................................... 429
Approach warning...................................... 260
Armrest............................................................ 353
Assist grips ..................................................... 353
Audio system-linked display ...................... 87
Automatic headlight leveling system ..... 191
Automatic High Beam ................................193
Automatic light control system................. 191
Automatic transmission ..............................178 M mode ........................................................... 183
Paddle shift switches .......................182, 183
Snow mode.................................................... 182
Auxiliary boxes ................................. 348, 350
Average fuel economy................................. 84
Average vehicle speed ................................ 84
B
Back-up lights Replacing light bulbs ................................. 416
Battery Battery checking ......................................... 391
If the battery is discharged .................... 444
Preparing and checking before winter......................................................................... 309
Warning light ...............................................428
Blind Spot Monitor (BSM)....................... 264
Boost gauge...................................................... 86
Brake Brake hold ......................................................188
Fluid........................................................ 389, 461

517Alphabetical Index
SunshadeRoof ................................................................... 156
Switches Activating the Automatic High Beam193
Automatic High Beam system..............193
Brake Hold switch ..................................... 188
Digital Rearview Mi rror control switches
...........................................................................143
Door lock switches .................................... 104
Driving mode select switch .................. 299
Driving position memory switches .....133
Dynamic radar cruise control with full-speed range switch ....................... 254
Electronic roof sunshade switches .... 158
Emergency flashers switch .................... 418
Engine switch................................................. 174
Garage door opener switches ..........360
Heated steering wheel switch............. 336
HUD (Head-up display) switch.............. 91
Ignition switch................................................ 174
Instrument panel light control switches ..................................................................... 77, 81
Light switches ............................................... 190
LTA (Lane Tracing As sist) switch..... 244
Meter control switches .............................. 83
Moon roof switches .................................. 156
“ODO TRIP” switch ............................. 76, 81
Outside rear view mirror switches ...... 151
Paddle shift switches ....................... 182, 183
Panoramic moon roof switches .......... 158
Parking brake switch ................................ 186
PCS OFF switch ........................................ 230
PKSB (Parking Support Brake) switch .........................................................................285
Power door lock switch .......................... 104
Power window switches ..........................153
RCD (Rear Camera Detection) switch ...........................................................................281
Rear door sunshade switch..................356
Rear seat heater ......................................... 333
Rear seat position memory switches. 137
Rear seat ventilator ................................... 333 Rear sunshades switch........................... 358
Rear window and outside rear view mir-
ror defoggers switch ............................ 323
Seat heater switches.................................336
Seat ventilator switches ..........................336
Snow mode switch..................................... 182
“SOS” button...................................................58
Tilt and telescopic steering control switch ............................................................................. 141
Tire pressure warning reset switch.. 399
Trunk closer switch ...................................... 110
Trunk opener main switch........................ 112
Trunk opener switch ................................. 108
Vehicle-to-vehicle distance switch...254
VSC OFF switch ...................................... 305
Window lock switch.................................. 155
Windshield wiper and washer switch196
Windshield wiper de-icer switch.......328
T
Tachometer............................................... 75, 78 Rev indicator .................................................. 80
Rev peak........................................................... 80
Tail lights Light switch .................................................... 190
Replacing light bulbs ................................. 416
Theft deterrent system Alarm...................................................................66
Engine immobilizer system...................... 64
Tire inflation pressure Maintenance data ...................................... 462
Tire inflation pressure display function......................................................................... 395
Warning light .................................................431
Tire information .............................................467 Glossary .........................................................470
Size ................................................................... 468
Tire identification number..................... 468
Uniform Tire Quality Grading ............469
Tire pressure display ... ............................... 395
Tire pressure warning system Function ......................................................... 395