warning light lexus LC500 2018 Service Manual

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4-4. Refueling
1Press the opener.
2 Open the fuel filler door until it is
securely locked.
3 Turn the fuel tank cap slowly and
remove it, then put it into the holder
on the fuel filler door.
■If the fuel filler door cannot be opened
 P.388
After refueling, turn the fuel tank cap
until you hear a click. Once the cap is
released, it will turn slightly in the oppo-
site direction.
Opening the fuel tank capClosing the fuel tank cap
WARNING
■When replacing the fuel tank cap
Do not use anything but a genuine Lexus fuel tank cap designed for your vehicle. Doing so may cause a fire or other inci-
dent which may result in death or serious injury.

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4-5. Using the driving support systems
Driving
WARNING
●If the part of the windshield in front of the camera sensor is fogged up or covered with condensation or ice, use
the windshield defogger to remove the fog, condensation or ice. ( P.281)
●If water droplets cannot be properly removed from the area of the wind-
shield in front of the camera sensor by the windshield wipers, replace the wiper insert or wiper blade.
If the wiper inserts or wiper blades need to be replaced, contact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
●Do not attach window tinting to the windshield.
●Replace the windshield if it is damaged
or cracked. If the windshield needs to be replaced, contact any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer.
●Do not get the camera sensor wet.
●Do not allow bright lights to shine into the camera sensor.
●Do not dirty or damage the camera
sensor. When cleaning the inside of the wind-shield, do not allow glass cleaner to
contact the lens. Also, do not touch the lens. If the lens is dirty or damaged, contact
any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●Do not subject the camera sensor to a
strong impact.
●Do not change the installation position or direction of the camera sensor or remove it.
●Do not disassemble the camera sen-
sor.
●Do not install an electronic device or device that emits strong electric waves
near the camera sensor.
●Do not modify any components of the vehicle around the camera sensor (inside rear view mirror, etc.) or ceiling.
●Do not attach any accessories that
may obstruct the camera sensor to the hood, front grille or front bumper. Contact any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer for details.
●If a surfboard or other long object is to be mounted on the roof, make sure
that it will not obstruct the camera sen- sor.
●Do not modify the headlights or other lights.

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4-5. Using the driving support systems
■Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on ( P.92) of
the multi-information display.
The system is automatically enabled each
time the engine switch <power switch> is
turned to IGNITION ON mode <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.
■Changing the pre-collision warn-
ing timing
The pre-collision warning timing can
be changed on ( P.92) of the
multi-information display.
The operation timing setting is retained
when the engine switch <power switch> is
turned off.
1 Far
The warning will begin to operate earlier
than with the default timing.
WARNING
●When inspecting the vehicle using a drum tester such as a chassis dyna-mometer or speedo meter tester, or
when using an on vehicle wheel bal- ancer
●When a strong impact is applied to the front bumper or front grille, due to an
accident 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 the radar sensor or camera sensor is temporarily installed to the vehicle
Changing settings of the pre-col-
lision safety system

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4-5. Using the driving support systems
Driving
2Middle
This is the default setting.
3Near
The warning will begin to operate later
than with the default timing.
■Operational conditions
Availability of the pedestrian detection function and pre-collision braking function
depend on the region in which the vehicle was sold.
Read the following for details:
Region A (The pedestrian detection function is available)
The pre-collision system is enabled and the system determines that the possibility of a
frontal collision with a vehicle or pedestrian is high.
Each function is operational at the following speeds:
●Pre-collision warning:• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For
detecting a pedestrian, vehicle speed is between approximately 10 and 80 km/h [7 and 50 mph].)
• The relative speed between your vehicle and the vehicle or pedestrian ahead is approximately 10 km/h (7 mph) or more.
●Pre-collision brake assist:• Vehicle speed is between approximately
30 and 180 km/h (20 and 110 mph). (For detecting a pedestrian, vehicle speed is between approximately 30 and 80 km/h
[20 and 50 mph].) • The relative speed between your vehicle and the vehicle or pedestrian ahead is
approximately 30 km/h (20 mph) or
more.
●Pre-collision braking:
• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For detecting a pedestrian, vehicle speed is
between approximately 10 and 80 km/h [7 and 50 mph].)• The relative speed between your vehicle
and the vehicle or pedestrian ahead is approximately 10 km/h (7 mph) or more.
The system may not operate in the following situations:
●If a 12-volt battery terminal has been dis-connected and reconnected and then the vehicle has not been driven for a certain
amount of time
●If the shift position is in R
●If VSC is disabled (only the pre-collision warning function will be operational)
●If the PCS warning light is flashing or illu-minated
Region B (The pedestrian detection function is not
available)
The pre-collision system is enabled and the
system determines that the possibility of a frontal collision with a vehicle is high.
Each function is operational at the following speeds:
●Pre-collision warning:• Vehicle speed is between approximately
15 and 180 km/h (10 and 110 mph). • The relative speed between your vehicle and the vehicle ahead is approximately
10 km/h (7 mph) or more.
●Pre-collision brake assist:
• Vehicle speed is between approximately 30 and 180 km/h (20 and 110 mph).• The relative speed between your vehicle
and the vehicle ahead is approximately 30 km/h (20 mph) or more.
●Pre-collision braking:• Vehicle speed is between approximately 15 and 180 km/h (10 and 110 mph).
• The relative speed between your vehicle and the vehicle ahead is approximately 10 km/h (7 mph) or more.
RegionsFunction availability
Region AThe pedestrian detection
function is available
Region BThe pedestrian detection
function is not available

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4-5. Using the driving support systems
The system may not operate in the following situations:
●If a 12-volt battery terminal has been dis-connected and reconnected and then the vehicle has not been driven for a certain
amount of time
●If the shift position is in R
●If VSC is disabled (only the pre-collision warning function will be operational)
●If the PCS warning light is flashing or illu-minated
■Pedestrian detection function*2
The pre-collision system detects pedestri-
ans based on the size, profile, and motion of a detected object. However, a pedestrian may not be detected depending on the sur-
rounding brightness and the motion, pos- ture, and angle of the detected object, preventing the system from operating prop-
erly. ( P.215)
*2: Depending on the region in which the
vehicle was sold, the pedestrian detec-
tion function may not be available.
■Cancelation of the pre-collision braking
If either of the following occur while the pre-collision braking function is operating, it will be canceled:
●The accelerator pedal is depressed strongly.
●The steering wheel is turned sharply or abruptly.
■Conditions under which the system may
operate even if there is no possibility of a collision
●In some situations such as the following, the system may determine that there is a possibility of a frontal collision and oper-
ate.
• When passing a vehicle or pedestrian*2
• When changing lanes while overtaking a preceding vehicle• When overtaking a preceding vehicle
that is changing lanes • When overtaking a preceding vehicle that is making a left/right turn
• When passing a vehicle in an oncoming lane that is stopped to make a right/left
turn
• When driving on a road where relative
location to vehicle ahead in an adjacent lane may change, such as on a winding road
• When rapidly closing on a vehicle ahead • If the front of the vehicle is raised or low-
ered, such as when the road surface is uneven or undulating• When approaching objects on the road-
side, such as guardrails, utility poles, trees, or walls
• When there is a vehicle, pedestrian*2, or

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4-5. Using the driving support systems
Driving
improper tire inflation pressure, etc.) • When the vehicle is being driven on a gravel road or other slippery surface
●Some pedestrians such as the following may not be detected by the radar sensor
and camera sensor, preventing the sys-
tem from operating properly*2:
• Pedestrians shorter than approximately 1 m (3.2 ft.) or taller than approximately 2 m (6.5 ft.)
• Pedestrians wearing oversized clothing (a rain coat, long skirt, etc.), making their silhouette obscure
• Pedestrians who are carrying large bag- gage, holding an umbrella, etc., hiding part of their body
• Pedestrians who are bending forward or squatting• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle • Groups of pedestrians which are close together
• Pedestrians who are wearing white and look extremely bright• Pedestrians in the dark, such as at night
or while in a tunnel • Pedestrians whose clothing appears to be nearly the same color or brightness as
their surroundings • Pedestrians near walls, fences, guardrails, or large objects
• Pedestrians who are on a metal object (manhole cover, steel plate, etc.) on the road
• Pedestrians who are walking fast • Pedestrians who are changing speed abruptly
• Pedestrians running out from behind a vehicle or a large object• Pedestrians who are extremely close to
the side of the vehicle (outside rear view mirror, etc.)*2: Depending on the region in which the
vehicle was sold, the pedestrian detec-
tion function may not be available.
■If the PCS warning light flashes and a
warning message is displayed on the multi-information display
The pre-collision system may be temporar- ily unavailable or there may be a malfunc-
tion in the system. In this case, read the warning message and follow the instruction.
●In the following situations, the warning light will turn off, the message will disap-pear and the system will become opera-
tional when normal operating conditions return:• When the radar sensor or camera sensor
or the area around either sensor is hot, such as in the sun• When the radar sensor or camera sensor
or the area around either sensor is cold, such as in an extremely cold environment• When the radar sensor or front grille
emblem is dirty or covered with snow, etc.•When the part of the windshield in front
of the camera sensor is fogged up or cov- ered with condensation or ice (Defog-ging the windshield: P.281)
• If the camera sensor is obstructed, such as when the hood is open or a sticker is attached to the windshield near the cam-
era sensor
●If the PCS warning light continues to flash
or the warning message does not disap- pear, the system may be malfunctioning. Have the vehicle inspected by any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable repairer immedi-
ately.
■If VSC is disabled
●If VSC is disabled ( P.263), 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.

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4-5. Using the driving support systems
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. The LKA system does not automatically
drive the vehicle or reduce the amount of attention that must be paid to the area in front of the vehicle. The driver must
always assume full responsibility for driv- ing safely by paying careful attention to the surrounding conditions and operat-
ing the steering wheel to correct the path of the vehicle. Also, the driver must take adequate breaks when fatigued, such as
from driving for a long period of time. Failure to perform appropriate driving operations and pay careful attention may
lead to an accident, resulting in death or serious injury.
■To avoid operating LKA system by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA system
Do not use the LKA system in the follow- ing situations.The system may not operate properly
and lead to an accident, resulting in death or serious injury.
●A spare tire, tire chains, etc. are equipped.
●When the tires have been excessively
worn, or when the tire inflation pres- sure is low.
●Tires which differ by structure, manu-facturer, brand or tread pattern are
used.
●Objects or patterns that could be mis- taken for white (yellow) lines are pres-ent on the side of the road (guardrails,
curbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc. are present due to road repair.
●Vehicle is driven in a temporary lane or
restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather,
fallen snow, freezing, etc.
●Vehicle is driven in traffic lanes other than on highways and freeways.
●Vehicle is driven in a construction zone.
■Preventing LKA system malfunctions
and operations performed by mistake
●Do not modify the headlights or place
stickers, etc. on the surface of the lights.

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4-5. Using the driving support systems
●The vehicle is driven on a surface that is bright due to reflected light, etc.
●The vehicle is driven in an area where the brightness changes suddenly, such as at the entrances and exits of tunnels, etc.
●Light from the headlights of an oncoming vehicle, the sun, etc. enters the camera.
●The vehicle is driven where the road diverges, merges, etc.
●The vehicle is driven on a slope.
●The vehicle is driven on a road which tilts left or right, or a winding road.
●The vehicle is driven on an unpaved or rough road.
●The vehicle is driven around a sharp curve.
●The traffic lane is excessively narrow or wide.
●The vehicle is extremely tilted due to car-rying heavy luggage or having improper tire pressure.
●The distance to the preceding vehicle is extremely short.
●The vehicle is moving up and down a
large amount due to road conditions during driving (poor roads or road seams).
●The headlight lenses are dirty and emit a faint amount of light at night, or the beam
axis has deviated.
●The vehicle is struck by a crosswind.
●The vehicle has just changed lanes or crossed an intersection.
●Snow tires, etc. are equipped.
■Warning message
If the following warning message is dis- played on the multi-information display and the LKA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce- dure.
Warning mes-
sageDetails/Actions
“Lane Keep-
ing Assist
Malfunction
Visit Your
Dealer”
The system may not be
operating properly.
 Have the vehicle
inspected any authorized
Lexus retailer or Lexus
authorized repairer, or
any reliable repairer.
“Front Cam-
era Vision
Blocked
Clean and
Demist Wind-
shield”
Dirt, rain, condensation,
ice, snow, etc. are present
on the windshield in front
of the camera sensor.
 Turn the LKA system
off, remove any dirt, rain,
condensation, ice, snow,
etc. from the windshield,
and then turn the LKA sys-
tem back on.
“Front Cam-
era Unavail-
able”
The operation conditions
of the camera sensor
(temperature, etc.) are
not met.
 When the operation
conditions of the camera
sensor (temperature, etc.)
are met, the LKA system
will become available.
Turn the LKA system off,
wait for a little while, and
then turn the LKA system
back on.

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4-5. Using the driving support systems
In the following situations, the RSA sys-
tem alerts the driver using a warning
display.
 When the vehicle speed exceeds
the speed warning threshold
applied to the speed limit of the sign
displayed on the multi-information
display, the sign color becomes
inverted.
 If it is detected that your vehicle is
overtaking when a no overtaking
sign is displayed on the multi-infor-
mation display, the sign flashes.
 Vehicles with navigation system:
When the RSA system recognizes a
no-entry sign and detects that the
vehicle has entered a no-entry area
based on the map information of the
navigation system, the no-entry sign
flashes.
Depending on the situation, traffic
environment (traffic direction, speed,
unit) may be detected incorrectly and a
warning display may not operate prop-
erly.
■Automatic turn-off of RSA sign display
One or more signs automatically turn off in the following situations.
●A new sign is not recognized for a certain distance.
●The road changes due to a left or right turn, etc.
■Conditions in which the function may
not operate or detect correctly
In the following situations, RSA does not
operate normally and may not recognize
signs, display the incorrect sign, etc. How- ever, this does not indicate a malfunction.
●The camera sensor is misaligned due to a strong impact being applied to the sen-sor, etc.
●Dirt, snow, stickers, etc., are on the wind-shield near the camera sensor.
●In inclement weather such as heavy rain, fog, snow or sand storms
●Light from an oncoming vehicle, the sun, etc. enters the camera sensor.
●The sign is dirty, faded, tilted or bent, and if an electronic sign, the contrast is poor.
●All or part of the sign is hidden by the leaves of a tree, a pole, etc.
●The sign is only visible to the camera sen-sor for a short amount of time.
●The driving scene (turning, lane change, etc.) is judged incorrectly.
●Even if it is a sign not appropriate for the currently traveled lane, such a sign exists
directly after a freeway branches, or in an adjacent lane just before merging.
●Stickers are attached to the rear of the preceding vehicle.
●A sign resembling a system compatible sign is recognized.
●The vehicle is driven in a country with a different direction of traffic.
●Side road speed signs may be detected and displayed (if positioned in sight of the
camera sensor) while the vehicle is trav- eling on the main road.
●Roundabout exit road speed signs may be detected and displayed (if positioned in sight of the camera sensor) while trav-
eling on a roundabout.
●Vehicles without navigation system: The
speed information displayed on the meter and that displayed on the naviga-tion system may be different due to the
navigation system using map data.
■When driving vehicle in country with dif- ferent speed unit
Since RSA recognizes signs based on the set unit of the meter, it is necessary to
Warning display

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4-5. Using the driving support systems
This mode employs a radar sensor to detect the presence of vehicles up to approx-
imately 100 m (328 ft.) ahead, determines the current vehicle-to-vehicle following
distance, and operates to maintain a suitable following distance from the vehicle
ahead.
Note that vehicle-to-vehicle distance will clos e in when traveling on long downhill slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle distance
can also be set by operating the vehicle-to-vehicle distance switch.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appears
When a vehicle is detected running ahead of you, the system automatically decelerates
your vehicle. When a greater reduction in ve hicle speed is necessary, the system applies
the brakes (the stop lights will come on at th is time). The system will respond to changes in
the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by
the driver. Approach warning warns you when the system cannot decelerate sufficiently to
prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your vehi cle will also stop (vehicle is stopped by sys-
tem control). After the vehicle ahead starts off, pressing the +/RES switch or depressing the
accelerator pedal will resume follow-up cruising.
WARNING
●When an approach warning buzzer is heard often
Driving in vehicl e-to-vehicle distance control mode
A
B