display LEXUS LS500 2019 Manual PDF

1774-2. Driving procedures
LS500_OM_(U)_1810 4
Driving
Press the brake hold switch to turn the
system on The brake hold standby indicator (green)
comes on. While the system is holding
the brakes, the brake hold operated indica-
tor (yellow) comes on.
■
Brake hold system operating conditions
The brake hold system cannot be turned on
in the following conditions:
●
The driver’s door is not closed.
●
The driver is not wearing the seat belt.
If any of the conditions above are detected
when the brake hold system is enabled, the
system will turn off and the brake hold
standby indicator light will go off. In addi-
tion, if any of the conditions are detected
while the system is holding the brake, a
warning buzzer will sound and a message will be shown on the multi-information dis-
play. The parking brake will then be set
automatically. ■
Brake hold function ●
If the brake pedal is left released for a
period of about 3 mi nutes after the sys-
tem has started holding the brake, the
parking brake will be set automatically. In
this case, a warning buzzer sounds and a
message is shown on the multi-informa-
tion display. ●
To turn the system off while the system is
holding the brake, firmly depress the
brake pedal and press the button again. ●
The brake hold function may not hold the
vehicle when the vehicle is on a steep
incline. In this situation, it may be neces-
sary for the driver to apply the brakes. A
warning buzzer will sound and the
multi-information display will inform the
driver of this situat ion. If a warning mes-
sage is shown on the multi-information
display, read the message and follow the
instructions. ■
When the parking brake is set automati-
cally while the system is holding the
brakes
Perform any of the following operations to
release the parking brake. ●
Depress the accelerator pedal. (The
parking brake will not be released auto-
matically if the seat belt is not fastened.) ●
Operate the parking brake switch with
the brake pedal depressed.
Make sure that the pa rking brake indicator
light goes off. (  P.174)
■
When an inspection at your Lexus
dealer is necessary
When the brake hold standby indicator
(green) does not illuminate even when the
brake hold switch is pressed with the brake
hold system operating conditions met, the
system may be malfun ctioning. Have the
vehicle inspected at your Lexus dealer.Brake Hold The brake hold system keeps the
brake applied when the shift posi-
tion is in D, M or N with the system
on and the brake pedal has been
depressed to stop the vehicle. The
system releases the brake when the
accelerator pedal is depressed with
the shift position in D or M to allow
smooth start off.
Enabling the system A
B

178 4-2. Driving procedures
LS500_OM_(U)_1810 ■
If “Brake Hold Fault Depress Brake to
Deactivate Visit Your Dealer” or “Brake
Hold Malfunction Visit Your Dealer” is
displayed on the mu lti-information dis-
play
The system may be ma lfunctioning. Have
the vehicle inspected by your Lexus dealer. ■
Warning messages and buzzers
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution. If a warn-
ing message is shown on the multi-informa-
tion display, read the message and follow
the instructions. ■
If the brake hold operated indicator
flashes
 P.422
WARNING■
When the vehicle is on a steep incline
When using the brake hold system on a
steep incline exercise caution. The brake
hold function may not hold the vehicle in
such a situation. ■
When stopped on a slippery road
The system cannot stop the vehicle when
the gripping ability of the tires has been
exceeded. Do not use the system when
stopped on a slippery road.
NOTICE
■
When parking the vehicle
The brake hold system is not designed
for use when parking the vehicle for a
long period of time. Turning the engine
switch off while the system is holding the
brake may release the brake, which
would cause the vehicle to move. When
operating the engine switch, depress the
brake pedal, shift the shift position to P
and set the parking brake.

1934-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving WARNING●
Keep the radar sensors and their sur-
rounding areas on the front bumper
clean at all times.
If a radar sensor or its surrounding area
on the front bumper is dirty or covered
with snow, the system may not operate
and a warning message (  P.428) will be
displayed.
If this occurs, clean off the dirt or snow
and drive the vehicle for approximately
10 minutes.
If the warning message does not disap-
pear, have your vehicle inspected by your
Lexus dealer. ●
Do not attach accessories, stickers
(including transparen t stickers), alumi-
num tape or other items to the radar
sensors or their surrounding area.
●
Do not subject a radar sensor or its
surrounding area on the front bumper
to a strong impact.
If a radar sensor is moved even slightly
off position, the system may malfunction
and vehicles may not be detected cor-
rectly.
In the following situations, have your
vehicle inspected by your Lexus dealer.
• If a radar sensor or its surrounding
area is subject to a strong impact
• If the area on the front bumper around
a radar sensor is scratched or dented,
or the front bumper has become par-
tially disengaged ●
Do not disassemble the radar sensors. ●
Do not modify the radar sensors or
their surrounding area on the front
bumper. ●
If a radar sensor or the front bumper
needs to be removed and installed, or
replaced, contact your Lexus dealer. ●
Do not paint the front bumper any
color other than an official Lexus color. ■
To avoid malfunction of the front cam-
era
Observe the following precautions.
Otherwise, the front camera may not
operate properly, possibly leading to an
accident resulting in death or serious
injury. ●
Keep the windshield clean at all times.
• If the windshield is dirty or covered
with an oily film, water droplets, snow,
etc., clean the windshield.
• As some glass coating agents may
affect the detection performance of
the front camera, consult your Lexus
dealer when using a glass coating
agent.
• If a glass coating agent is applied to the
windshield, it will still be necessary to
use the windshield wipers to remove
water droplets, etc. from the area of
the windshield in front of the front
camera.
• If the inner side of the windshield
where the front camera is installed is
dirty, contact your Lexus dealer.

196 4-5. Using the driving support systems
LS500_OM_(U)_1810 ■
If a warning message is displayed on the multi-information display
A system may be temporarily unavailable or there may be a malfunction in the system.●
In the following situations, perform the actions specified in the table. When the normal
operating conditions are detected, the me ssage will disappear and the system will
become operational.
If the message does not disappea r, contact your Lexus dealer.
Situation Actions
When the area around a sensor is covered
with dirt, moisture (f ogged up, covered with
condensation, ice, etc.), or other foreign
matter To clean the part of the windshield in front of
the front camera , use the windshield wipers
or the windshield defo gger of the air condi-
tioning system (  P.314).

202 4-5. Using the driving support systems
LS500_OM_(U)_1810 ■
If a warning message is displayed on the multi-information display
A system may be temporarily unavailable or there may be a malfunction in the system.●
In the following situations, perform the actions specified in the table. When the normal
operating conditions are detected, the me ssage will disappear and the system will
become operational.
If the message does not disappea r, contact your Lexus dealer.
Situation Actions
When the area around a sensor is covered
with dirt, moisture (f ogged up, covered with
condensation, ice, etc.), or other foreign
matter To clean the part of the windshield in front of
the front camera , use the windshield wipers
or the windshield defo gger of the air condi-
tioning system (  P.314).
When the temperature around the front
camera is outside of the operational range,
such as when the vehicle is in the sun or in an
extremely cold environment If the front camera is hot, such as after the
vehicle had been parked in the sun, use the
air conditioning system to decrease the tem-
perature around the front camera.
If a sunshade was used when the vehicle
was parked, depending on its type, the sun-
light reflected from the surface of the sun-
shade may cause the temperature of the
front camera to become excessively high.
If the front camera is cold, such after the
vehicle is parked in an extremely cold envi-
ronment, use the air conditioning system to
increase the temperature around the front
camera.

204 4-5. Using the driving support systems
LS500_OM_(U)_1810 ■
Pedestrian alert
When the system determines that
there is a possibility of a frontal collision
with a stationary or moving pedestrian
in front of your vehicle, a message will
be displayed on the head-up display to
warn the driver. ■
Pre-collision warning
When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes-
sage will be displayed on the
multi-information display to urge the
driver to take evasive action.
■
Pre-collision brake assist
When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed. ■
Pre-collision braking
If the system determines that the possi-
bility of a frontal collision is extremely
high, the brakes are automatically
applied to help avoid the collision or
reduce the impact of the collision. ■
Active steering assist
If the system determines that the possi-PCS (Pre-Collision System)
(vehicles with Lexus Safety
System + A) The pre-collision system uses a
front radar sensor and front camera
to detect vehicles and pedestri-
ans/bicyclists in front of your vehi-
cle and front side radar sensors to
detect vehicles approaching from
the front left or right side. When the
system determines that the possi-
bility of a frontal collision with a
vehicle or pedestrian/bicyclist is
high, a warning operates to urge
the driver to take evasive action
and the potential brake pressure is
increased to help the driver avoid
the collision. If the system deter-
mines that the possibility of a frontal
collision with a vehicle or pedes-
trian/bicyclist is extremely high, the
brakes are automatically applied to
help avoid the collision or help
reduce the impact of the collision.
The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. (  P.208)
System functions

2074-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving ■
Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on (  P.80) of
the multi-information display. The system is automa tically enabled each
time the engine switch is turned to IGNI-
TION ON mode.
If the system is disabled, the PCS warn-
ing light will turn on and a message will
be displayed on the multi-information
display.
If the pre-collision sy stem is disabled,
the pedestrian alert system will also be
disabled. At this time, the FCTA (Front
Cross Traffic Alert) (  P.222) system
will also be disabled.
■
Enabling/Disabling the pedestrian
alert system
The pedestrian alert can be
enabled/disabled on (  P.80) of
the multi-information display. At this
time, the FCTA (Front Cross Traffic
Alert) system will also be enabled/dis-
abled.WARNING●
When your vehicle is towing another
vehicle●
When transporting the vehicle via
truck, boat, train or similar means of
transportation●
When the vehicle is raised on a lift with
the engine running and the tires are
allowed to rotate freely●
When inspecting the vehicle using a
drum tester such as a chassis dyna-
mometer or speedometer tester, or
when using an on vehicle wheel bal-
ancer●
When a strong impact has been
applied to the front bumper, rear
bumper or front grille, due to an acci-
dent or other reasons●
If the vehicle cannot be driven in a sta-
ble manner, such as when the vehicle
has been in an accident or is malfunc-
tioning●
When the vehicle is driven in a sporty
manner or off-road●
When the tires are not properly
inflated
●
When the tires are very worn
●
When tires of a size other than speci-
fied are installed
●
When tire chains are installed
●
When a compact spare tire or an
emergency tire puncture repair kit is
used
●
If equipment (snow plow, etc.) that may
obstruct a radar sensor or the front
camera is temporarily installed to the
vehicle Changing settings of the pre-col-
lision system

208 4-5. Using the driving support systems
LS500_OM_(U)_1810 ■
Changing the pre-collision warn-
ing timing
The pre-collision warning timing can
be changed on (  P.80) of the
multi-information display. The warning
timing for the pedestrian and FCTA
(Front Cross Traffic Alert) system will
also be changed. The warning timing se tting is retained
when the engine switch is turned off. How-
ever, if the pre-collision system is disabled
and re-enabled, the operation timing will
return to the default setting (middle).
1 Early
2 Middle This is the default setting.
3 Late ■
Changing the pedestrian alert tim-
ing
If the pre-collision warning timing is
changed, the pedestrian alert and
FCTA (Front Cross Traffic Alert) timing
will also be changed accordingly.■
Operational conditions
The pre-collision system is enabled and the system determines that the possibility of a frontal
collision with a vehicle, pedestri an/bicyclist, guardrail, etc. or a front side collision with a
vehicle is high. Each function is operational at the following speeds:●
Pedestrian alert
●
Pre-collision warning objects Vehicle speed
Pedestrians Approx. 20 to 40 mph (30 to 65 km/h)
objects Vehicle speed Relative speed between your
vehicle and object
Preceding vehicles Approx. 3 to 110 mph (5 to
180 km/h) Approx. 3 to 110 mph (5 to
180 km/h)
Bicyclists and pedestrians Approx. 3 to 50 mph (5 to
80 km/h) Approx. 3 to 50 mph (5 to
80 km/h)

214 4-5. Using the driving support systems
LS500_OM_(U)_1810 ●
In some situations, such as the following,
the sensors may not detect the lane lines
or a safe space the vehicle can be steered
into, preventing the ac tive steering assist
from operating properly:
• When the white (yellow) lane lines are
difficult to see, such as when they are
faint, diverging/merging, or a shadow is
cast upon them
• When the lane is more wide or narrow
than normal
• When there is a light and dark pattern on
the road surface, such as due to road
repairs
• If the system determines that a collision
can be avoided by only using the brakes
• When a pedestrian is detected near the
centerline of the vehicle●
In some situations such as the following,
sufficient braking force or steering force
may not be obtained, preventing the sys-
tem from performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained
(brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a
gravel road or other slippery surface
• If there are deep ruts in the road
• When driving on a slope
• When driving on a horizontally slanted
road●
Some guardrails, such as the following,
may not be detected by the sensors, pre-
venting the system from operating prop-
erly:
• Guardrails which are less than approxi-
mately 1.9 ft. (60 cm) tall
• Short guardrails
• Irregularly-shaped guardrails (wire cable
guardrails, guardrails made of thin poles,
etc.)
• Guardrails which are not illuminated by
the headlights at night, in a tunnel, etc.
• Guardrails which appear to be nearly the
same color or brig htness as their sur-
roundings
• Guardrails which appear to be nearly the
same shape as their surroundings (walls,
etc.) • Guardrails which are over a metal object
(manhole cover, steel plate, etc.)
• Guardrails which are hidden behind thick
grass
• Guardrails which are extremely close to
the side of the vehicle (outside rear view
mirror, etc.)
• Curved guardrails or guardrails at the
entrance of a curve ●
In some situations su ch as the following,
the system may detect a pedestrian and
display a warning on the head-up display,
even though no pedestrian exists:
• If the front of the vehicle is raised or low-
ered, such as when the road surface is
uneven or undulating (due to ruts, etc.)
• When driving on a slope
• When driving on a horizontally slanted
road
• If the driver’s posture (driver seat posi-
tion) is extreme, such as excessively
reclined
• If the head-up display position is set
extremely high ■
If VSC is disabled ●
If VSC is disabled (  P.294), the pre-col-
lision brake assist and pre-collision brak-
ing functions are also disabled. ●
The PCS warning light will turn on and
“VSC Turned Off Pre-Collision Brake
System Unavailable” will be displayed on
the multi-information display.

2154-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving
The system can detect the following:
 Vehicles
 Bicyclists
 Pedestrians
■
Pre-collision warning
When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes- sage will be displayed on the
multi-information display to urge the
driver to take evasive action.
■
Pre-collision brake assist
When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed. ■
Pre-collision braking
If the system determines that the possi-
bility of a frontal collision is extremely
high, the brakes are automatically
applied to help avoid the collision or
reduce the impact of the collision. ■
Pre-collision seatbacks (front pas-
senger’s seat / power rear seat [if
equipped])
If the system determines that the possi-
bility of a frontal collision is high, it may
move the seatbacks of the front pas-
senger’s seat and power rear seats to
the upright position automatically, if
reclined. If a seat is being adjusted, it may not be
moved by the pre-collis ion seat function.
■
Suspension control
When the system determines that the
possibility of a frontal collision is high, PCS (Pre-Collision System)
(vehicles with Lexus Safety
System + 2.0) The pre-collision system uses a
radar sensor and front camera to
detect objects (  P.215) in front of
the vehicle. When the system
determines that the possibility of a
frontal collision with an object is
high, a warning operates to urge
the driver to take evasive action
and the potential brake pressure is
increased to help the driver avoid
the collision. If the system deter-
mines that the possibility of a frontal
collision with an object is extremely
high, the brakes are automatically
applied to help avoid the collision or
help reduce the impact of the colli-
sion.
The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. (  P.217)
Detectable objects
System functions