ECU LEXUS LS500 2019 Service Manual

1694-2. Driving procedures
LS500_OM_(U)_1810 4
Driving
Shift lever Operate the shift lever gently and securely
in the direction of the arrow on the shift
position indicator.
To shift to N, slide the shift lever in the
direction of the arrow and hold it.
Release the shift lever after each shifting
operation to allow it to return to its regular
position ( ).
Shifting to M is only possible when the shift
position is in D.
When shifting from P to N, D or R, from N,
D, M or R to P, from D or M to R, or from R
to D, ensure that the brake pedal is being
depressed and the vehicle is stationary.
Shift position indicator Meter display:
The current shift position is highlighted.
When any shift position other than D or M
is selected, the arrow toward M and the M
position indicator are displayed in gray.
Shift lever display:WARNING■
When driving on slippery road sur-
faces
Do not accelerate or shift the shift posi-
tion suddenly.
Sudden changes in engine braking may
cause the vehicle to spin or skid, resulting
in an accident.
NOTICE■
Situations where sh ift control system
malfunctions are possible
If any of the following situations occurs,
shift control system malfunctions are
possible.
Immediately stop the vehicle in a safe
place on level ground, apply the parking
brake, and then contact your Lexus
dealer. ●
When the warning message indicating
the shift control syst em appears on the
multi-information display.●
The display indicates that no shift posi-
tion is selected for more than a few
seconds. Shifting the shift lever
A
B

1814-3. Operating the lights and wipers
LS500_OM_(U)_1810 4
Driving lever away from you to turn on the
high beams.Pull the lever toward you to the center
position to turn the high beams off.
2 Pull the lever toward you and
release it to flash the high beams
once.You can flash the high beams with the
headlights on or off.
AFS (Adaptive Front-lighting System)
secures excellent visibility at intersec-
tions and on curves by automatically
adjusting the direction of the light axis
of the headlights according to vehicle
speed and the degree of the tire’s angle
as controlled by steering input. AFS operates at speed s of approximately
6 mph (10 km/h) or higher.
■
Customization
Some functions can be customized.
(  P.466)
 When the steering wheel or turn
signal lever is operated while the
headlights are on (low beam), a cor-
nering light will turn on and light up
the direction of movement of the
vehicle. The cornering lights are
designed to ensure excellent visibil-
ity when making a turn at an inter-
section. However, when vehicle speed is more than
approximately 22 mph (35 km/h), the cor-
nering lights will not turn on.  When the shift position is in R while
the headlights are on (low beam),
both cornering lights will turn on.
This is designed to enhance visibility
when parking. ■
Cornering lights
When the cornering lights are on for more
than 30 minutes, they will turn off automati-
cally.
AFS (Adaptive Front-lighting
System) (if equipped)
Cornering lights

1894-4. Refueling
LS500_OM_(U)_1810 4
Driving 4-4.Refueling
 Close all the doors and windows,
and turn the engine switch off.
 Confirm the type of fuel. ■
Fuel types
 P.455■
Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehi-
cle has a fuel tank opening that only accom-
modates the special nozzle on unleaded
fuel pumps.Opening the fuel tank cap Perform the following steps to open
the fuel tank cap:
Before refueling the vehicle
WARNING■
When refueling the vehicle
Observe the following precautions while
refueling the vehicle. Failure to do so may
result in death or serious injury.
●
After exiting the ve hicle and before
opening the fuel door, touch an
unpainted metal surface to discharge
any static electricity. It is important to
discharge static electricity before refu-
eling because sparks resulting from
static electricity can cause fuel vapors
to ignite while refueling.
●
Always hold the grips on the fuel tank
cap and turn it slowly to remove it.
A whooshing sound may be heard
when the fuel tank cap is loosened.
Wait until the sound cannot be heard
before fully removing the cap. In hot
weather, pressurized fuel may spray
out the filler neck and cause injury. ●
Do not allow anyone that has not dis-
charged static electricity from their
body to come close to an open fuel
tank. ●
Do not inhale vaporized fuel.
Fuel contains substances that are
harmful if inhaled. ●
Do not smoke while refueling the vehi-
cle.
Doing so may cause the fuel to ignite
and cause a fire. ●
Do not return to the vehicle or touch
any person or object that is statically
charged.
This may cause static electricity to
build up, resulting in a possible ignition
hazard. ■
When refueling
Observe the following precautions to
prevent fuel overflowing from the fuel
tank: ●
Securely insert the fuel nozzle into the
fuel filler neck. ●
Stop filling the tank after the fuel noz-
zle automatically clicks off. ●
Do not top off the fuel tank.
NOTICE
■
Refueling
Do not spill fuel during refueling.
Doing so may damage the vehicle, such
as causing the emission control system to
operate abnormally or damaging fuel
system components or the vehicle’s
painted surface.

254 4-5. Using the driving support systems
LS500_OM_(U)_1810 the farther away the vehicle will be detected, caus ing the outside rear view mirror indi-
cator to illuminate or flash.■
The Blind Spot Monitor is operational
when
The Blind Spot Monitor is operational when
all of the following conditions are met: ●
The Blind Spot Monitor is on.●
The shift position is in a position other
than R.●
The vehicle speed is greater than approx-
imately 10 mph (16 km/h).■
The Blind Spot Monitor will detect a
vehicle when
The Blind Spot Monitor will detect a vehicle
present in the detection area in the follow-
ing situations: ●
A vehicle in an adj acent lane overtakes
your vehicle.●
You overtake a vehicle in an adjacent lane
slowly.●
Another vehicle enters the detection
area when it changes lanes.■
Conditions under wh ich the Blind Spot
Monitor will not detect a vehicle
The Blind Spot Monitor is not designed to
detect the following types of vehicles and/or
objects: ●
Small motorcycles, bicycles, pedestrians,
etc. *
●
Vehicles traveling in the opposite direc-
tion●
Guardrails, walls, signs, parked vehicles
and similar stationary objects *
●
Following vehicles th at are in the same
lane *
●
Vehicles traveling 2 lanes away from your
vehicle *
●
Vehicles which are being overtaken rap-
idly by your vehicle *
*
: Depending on the conditions, detection
of a vehicle and/or object may occur. ■
Conditions under which the Blind Spot
Monitor may not function correctly ●
The Blind Spot Monitor may not detect
vehicles correctly in the following situa-
tions:
• When the sensor is misaligned due to a
strong impact to the sensor or its sur-
rounding area
• When mud, snow, ice, a sticker, etc. is
covering the sensor or surrounding area
on the rear bumper
• When driving on a road surface that is
wet with standing water during bad
weather, such as heavy rain, snow, or fog
• When multiple vehicles are approaching
with only a small gap between each vehi-
cle
• When the distance between your vehicle
and a following vehicle is short
• When there is a significant difference in
speed between your vehicle and the vehi-
cle that enters the detection area
• When the difference in speed between
your vehicle and another vehicle is
changing
• When a vehicle enters a detection area
traveling at about the same speed as your
vehicle
• As your vehicle starts from a stop, a vehi-
cle remains in the detection area
• When driving up and down consecutive
steep inclines, such as hills, dips in the
road, etc.
• When driving on roads with sharp bends,
consecutive curves, or uneven surfaces
• When vehicle lanes are wide, or when
driving on the edge of a lane, and the
vehicle in an adjacent lane is far away
from your vehicle
• When an accessory (such as a bicycle
carrier) is installed to the rear of the vehi-
cle
• When there is a significant difference in
height between your vehicle and the
vehicle that enters the detection area
• Immediately after the Blind Spot Monitor
is turned on
●
Instances of the Blind Spot Monitor
unnecessarily detecting a vehicle and/or
object may increase in the following situ-

2554-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving ations:
• When the sensor is misaligned due to a
strong impact to the sensor or its sur-
rounding area
• When the distance between your vehicle
and a guardrail, wall, etc. that enters the
detection area is short
• When driving up an d down consecutive
steep inclines, such as hills, dips in the
road, etc.
• When vehicle lanes are narrow, or when
driving on the edge of a lane, and a vehi-
cle traveling in a lane other than the adja-
cent lanes enters the detection area
• When driving on roads with sharp bends,
consecutive curves, or uneven surfaces
• When the tires are slipping or spinning
• When the distance between your vehicle
and a following vehicle is short
• When an accessory (such as a bicycle
carrier) is installed to the rear of the vehi-
cle *
: If equipped
■
Intuitive parking assist (if
equipped)
Ultrasonic sensors are used to detect
static objects in the detection area
when driving at a low speed or backing
up. (  P.257) ■
RCTA (Rear Cross Traffic Alert)
function (if equipped)
Radar sensors are used to detect
approaching vehicles in the detection
areas behind the vehicle when backing
up. (  P.263) ■
RCD (Rear camera detection)
function (if equipped)
A rear camera sensor is used to detect
pedestrians in the detection area
behind the vehicle when backing up.
(  P.267)PKSA (Parking Support
Alert) *
The Parking Support Alert system
consists of the following functions
that operate when driving at a low
speed or backing up, such as when
parking. When the system deter-
mines that a collision with a
detected object, such as a wall, or
pedestrian is high, a warning oper-
ates to urge the driver to take eva-
sive action.
PKSA (Parking Support Alert)
system

340 5-5. Using the storage features
LS500_OM_(U)_1810 The cargo net is provided for securing
loose items on the floor or items inside
the trunk. Raise the cargo hooks on the floor.
Hook the net on the cargo hooks.

Side
Pull the strap upwards to lift the lug-
gage mat and remove it.Trunk features
Cargo net (if equipped)
WARNING
■
When the cargo net is not in use
To avoid injury, always return the cargo
hooks on the floor to their stowed posi-
tions. Shopping bag hooks
NOTICE■
To prevent damage to the grocery
bag hooks
Do not hang any object heavier than 11 lb.
(5 kg) on the grocery bag hooks.
Luggage mats

342 5-5. Using the storage features
LS500_OM_(U)_1810 2 Pass the belt through the clip
3 Tighten the beltDepending on the size and shape of an
object, such as the case of a warning
reflector, the object may not be able to be
secured with the belts or stowed in an aux-
iliary box. ■
Stowing the belt
1 Fold the belt
2 Secure the belt with the clipTo prevent damage to the warning reflec-
tor storage belt when it is not in use, stow
the belt.

350 5-6. Using the other interior features
LS500_OM_(U)_1810 The HomeLink ®
wireless control sys-
tem in your vehicle has 3 buttons which
can be programmed to operate 3 dif-
ferent devices. Refer to the program-
ming methods on the following pages
to determine the method which is
appropriate for the device.
HomeLink ®
indicator light
Garage door operation indicators
HomeLink ®
iconIlluminates while HomeLink ®
is operating.
Buttons ■
Codes stored in the HomeLink ®
mem-
ory
●
The registered codes are not erased even
if the battery cable is disconnected.
●
If learning failed when registering a dif-NOTICE●
Do not attach items to the rear sun-
shade.●
Keep the opening clean and clear of
obstructions.●
Do not operate the rear sunshade con-
tinuously for long periods of time.
Garage door opener The garage door opener can be
programmed using the Home-
Link ®
to operate garage doors,
gates, entry doors, door locks,
home lighting systems, security sys-
tems, and other devices.
System components
A
B
C
D

366 6-2. Maintenance
LS500_OM_(U)_1810 Radiator, con-
denser, inter-
cooler radiator
and intercooler
sub radiator The radiator, con-
denser, intercooler
radiator and inter-
cooler sub radiator
should be free from
foreign objects.
(  P.378)
Washer fluid Is there sufficient
washer fluid?
(  P.379)
Trunk Items Check points
Battery Check the connec-
tions. (  P.380)
Vehicle interior Items Check points
Accelerator
pedal • The accelerator
pedal should move
smoothly (without
uneven pedal effort
or catching).
Automatic trans-
mission “Park”
mechanism •When parked on a
slope and the shift
position is in P, is the
vehicle securely
stopped?Items Check points
Brake pedal •Does the brake
pedal move
smoothly?
•Does the brake
pedal have appro-
priate clearance
from the floor?
•Does the brake
pedal have the cor-
rect amount of free
play?
Brakes • The vehicle should
not pull to one side
when the brakes are
applied.
•The brakes should
work effectively.
• The brake pedal
should not feel
spongy.
• The brake pedal
should not get too
close to the floor
when the brakes are
applied.
Head restraints •Do the head
restraints move
smoothly and lock
securely?
Indicators/buzz-
ers •Do the indicators
and buzzers function
properly?
Lights • Do all the lights
come on?Items Check points

3676-2. Maintenance
LS500_OM_(U)_1810 6
Maintenance and care Parking brake • Does the parking
brake operate nor-
mally?
•When parked on a
slope and the park-
ing brake is on, is the
vehicle securely
stopped?
Seat belts • Do the seat belts
operate smoothly?
• The seat belts should
not be damaged.
Seats • Do the seat controls
operate properly?
Steering wheel • Does the steering
wheel rotate
smoothly?
• Does the steering
wheel have the cor-
rect amount of free
play?
•There should not be
any strange sounds
coming from the
steering wheel.
Vehicle exterior Items Check points
Doors/trunk • Do the doors/trunk
operate smoothly?
Engine hood •Does the engine
hood lock system
work properly?
Fluid leaks •There should not be
any signs of fluid
leakage after the
vehicle has been
parked.Items Check points
Tires • Is the tire inflation
pressure correct?
• The tires should not
be damaged or
excessively worn.
• Have the tires been
rotated according to
the maintenance
schedule?
•The wheel nuts
should not be loose.
Windshield wip-
ers • The wiper blades
should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.
• The wiper blades
should clear the
windshield without
streaking or skip-
ping.Items Check points