2018 LEXUS LS500 Owners Manual

571-2. Child safety
LS500_OM_OM50F54U_(U) 1
For safety and security WARNING●
Firmly attach the top tether strap and
make sure that the belt is not twisted.●
Do not attach the top tether strap to
anything other than the anchor
bracket.●
After securing a child restraint system,
never adjust the seat.●
Follow all installation instructions pro-
vided by the child restraint system
manufacturer.●
Be sure to have the top tether strap
pass over the top of the head restraint.
If the belt passes below the head
restraint, it is possible that the child
restraint system may not be securely
fixed.
NOTICE■
Anchor brackets (for top tether
strap)
When not in use, make certain to close
the lid. If it remains open, the lid may be
damaged.

58 1-3. Theft deterrent system
LS500_OM_OM50F54U_(U) 1-3.Theft deterrent system
The indicator light flashes after the
engine switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the engine switch has been turned to
ACCESSORY or IGNITION ON
mode to indicate that the system has
been canceled. ■
System maintenance
The vehicle has a maintenance-free type
engine immobilizer system. ■
Conditions that may cause the system to
malfunction ●
If the grip portion of the key is in contact
with a metallic object ●
If the key is in close proximity to or touch-
ing a key to the security system (key with
a built-in transponder chip) of another
vehicle
■
Certification for the en gine immobilizer system
For vehicles sold in the U.S.A. , Hawaii, Guam and Puerto RicoEngine immobilizer system The vehicle’s keys have built-in tran-
sponder chips that prevent the
engine from starting if a key has not
been previously registered in the
vehicle’s on-board computer.
Never leave the keys inside the
vehicle when you leave the vehicle.
This system is designed to help pre-
vent vehicle theft but does not
guarantee absolute security
against all vehicle thefts.
Operating the system

591-3. Theft deterrent system
LS500_OM_OM50F54U_(U) 1
For safety and security 
For vehicles sold in Canada
NOTICE■
To ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.

60 1-3. Theft deterrent system
LS500_OM_OM50F54U_(U) ■
Items to check before locking the
vehicle
To prevent unexpected triggering of
the alarm and vehicle theft, make sure
of the following:
 Nobody is in the vehicle.
 The windows, moon roof (if
equipped) and panoramic moon
roof (if equipped) are closed before
the alarm is set.
 No valuables or other personal
items are left in the vehicle. ■
Setting
Close the doors, trunk and hood, and
lock all the doors. The system will be
set automatically after 30 seconds. The indicator light changes from being on
to flashing when the system is set. ■
Canceling or stopping
Do one of the following to deactivate
or stop the alarms:
 Unlock the doors.
 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.) ■
System maintenance
The vehicle has a maintenance-free type
alarm system. ■
Triggering of the alarm
The alarm may be triggered in the following
situations:
(Stopping the alarm deactivates the alarm
system.) ●
The trunk is opened using the mechanical
key.
●
A person inside the vehicle opens a door,
the trunk or hood, or unlocks the vehicle.Alarm The alarm uses light and sound to
give an alert when an intrusion is
detected.
The alarm is triggered in the follow-
ing situations when the alarm is set:
 A locked door or trunk is
unlocked or opened in any way
other than using the entry func-
tion, wireless remote control or
mechanical key. (The doors will
lock again automatically.)
 The hood is opened.
Setting/canceling/stopping the
alarm system

611-3. Theft deterrent system
LS500_OM_OM50F54U_(U) 1
For safety and security ●
The battery is rech arged or replaced
when the vehicle is locked. ( → P.441)
■
Alarm-operated door lock
In the following cases, depending on the sit-
uation, the door may automatically lock to
prevent improper entry into the vehicle: ●
When a person remaining in the vehicle
unlocks the door and the alarm is acti-
vated.●
While the alarm is activated, a person
remaining in the vehicle unlocks the door.
NOTICE■
To ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.

62 1-3. Theft deterrent system
LS500_OM_OM50F54U_(U)

63
LS500_OM_OM50F54U_(U) 2 2
Vehicle status information and indicators Vehicle status information
and indicators .
2-1. Instrument cluster
Warning lights and indicators
........................................................... 64
Gauges and meters (except F
SPORT models) ........................ 69
Gauges and meters (F SPORT
models) ........................................... 72
Multi-information display.......... 76
Head-up display ........................... 83
Fuel consumption information
........................................................... 87

64 2-1. Instrument cluster
LS500_OM_OM50F54U_(U) 2-1.Instrument cluster
For the purpose of explanatio n, the following illustrations display all warning lights
and indicators illuminated. 
Except F SPORT models

F SPORT modelsWarning lights and indicators The warning lights and indicators on th e instrument cluster, center panel and
outside rear view mirrors inform the driver of the status of the vehicle’s various
systems.
Warning lights and indicators displayed on the instrument cluster