wheel LEXUS RX200T 2017 Workshop Manual

3144-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
◆Lane departure alert function
When the system determines that
the vehicle might depart from its
lane, a warning is displayed on the
multi-information display, and either
the warning buzzer sounds or the
steering wheel vibrates to alert the
driver.
When the warning buzzer sounds or the steering wheel vibrates, checkthe surrounding road situation and
carefully operate the steering wheel to move the vehicle back to the cen-ter within the white (yellow) lines.
Functions included in LKA system

3154-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
◆Lane departure control function
When the system determines that
the vehicle might depart from its
lane, the system provides assistance
as necessary by operating the steer-
ing wheel in small amounts for a
short period of time to keep the
vehicle in its lane.
If the system detects that the steering wheel has not been operated for afixed amount of time or the steering
wheel is not being firmly gripped, a warning is displayed on the multi-information display and the function
is temporarily canceled.
◆Vehicle sway warning
When the vehicle is swaying or
appears as if it may depart from its
lane multiple times, the warning
buzzer sounds and a message is dis-
played on the multi-information dis-
play to alert the driver.

3164-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
◆Lane-keeping assist function
This function is linked with radar
cruise control and provides the
required assistance by operating the
steering wheel to keep the vehicle in
its current lane.
When radar cruise control is not operating, the lane-keeping assistfunction does not operate.
Except for Israel: If the system detects that the steering wheel hasnot been operated for a fixed amount
of time or the steering wheel is not being firmly gripped, a warning is dis-played on the multi-information dis-
play and the function is temporarily canceled.
For Israel: If the system detects that
the steering wheel has not been operated for a fixed amount of timeor the steering wheel is not being
firmly gripped, a warning is displayed on the multi-information display andthe warning buzzer sounds.

3174-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. LKA is not a system which automatically drives the vehicle or reduces the amount of attention that must be paid to the area in
front of the vehicle. The driver must always assume full responsibility for driving safely by always paying careful attention to the surrounding conditions and operate the steer-ing wheel to correct the path of the vehicle. Also, make sure to take adequate breaks
when fatigued, such as from driv ing for a long period of time. Failure to perform appropriate driving operat ions and pay careful attention may lead to an accident, resulting in death or serious injury.
■To avoid operating LKA by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA
Do not use the LKA system in the following situations. The system may not operate properly and le ad 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 pressure is low.
●Tires which differ by structure, manufacturer, brand or tread pattern are used.
●Objects or patterns that could be mistaken for white (yellow) lines are present on the side of the road (guardrails, cu rbs, 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.
●When your vehicle is towing a trailer or during emergency towing
■Preventing LKA system malfunctions and operations performed by mistake
●Do not modify the headlights or place stic kers, etc., on the surface of the lights.
●Do not modify the suspension etc. If the suspension etc. needs to be replaced, con- tact any authorized Lexus dealer or repair er, or another duly qualified and equipped
professional.
●Do not install or place anything on the hood or grille. Also, do not install a grille guard (bull bars, kangaroo bar, etc.).
●If your windshield needs repairs, contact any authorized Lexus dealer or repairer, oranother duly qualified an d equipped professional.

3194-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
LKA indicator
The illumination condition of the
indicator informs the driver of the
system operation status.
Illuminated in white:
LKA system is operating.
Illuminated in green: Steering wheel assistance of the lane
departure control function or lane- keeping assist function is operating.
Flashing in amber:
Lane departure alert function is operat- ing.
Operation display of steering wheel
operation support
Indicates that steering wheel assistance of the lane departure control function
or lane-keeping assist function is operating.
Lane departure alert function display
Displayed when the multi-information display is switched to the driving assist
system information screen.
Indications on multi-information display
1
2
3
Inside of displayed white lines is
white
Inside of displayed white lines is
black
Indicates that the system is recognizing
white (yellow) lines. When the vehicle
departs from its lane, the white line dis-
played on the side the vehicle departs
from flashes amber.
Indicates that the system is not able to
recognize white (yellow) lines or is
temporarily canceled.

3204-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Operation conditions of each function
●Lane departure alert function
This function operates when all of the following conditions are met.
• LKA is turned on.
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• System recognizes white (yellow) lines.
• Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius of more than approximately 150 m (492 ft.).
• No system malfunctions are detected. ( P. 666)
●Lane departure control function
This function operates when all of the follo wing conditions are met in addition to the
operation conditions for the la ne departure alert function.
• Setting for “Steering Assist” in of the multi-information display is set to “On”.
(  P. 110)
• Vehicle is not accelerated or decelerated by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for changing
lanes.
• ABS, VSC, TRC and PCS are not operating.
• TRC or VSC is not turned off.
• Except for Israel: Hands off steerin g wheel alert is not displayed. (P. 321)
●Vehicle sway warning
This function operates when all of the following conditions are met.
• Setting for “Sway Warning” in of the multi-information display is set to “On”.
(  P. 110)
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• No system malfunctions are detected. ( P. 666)
●Lane-keeping assist function
This function operates when all of the following conditions are met.
• LKA is turned on.
• Setting for “Lane Center” in of the mu lti-information display are set to “On”.
(  P. 110)
• System recognizes white (yellow) lines.
• Dynamic radar cruise control with full-speed range is operating.
• Width of traffic lane is approximately 2.5 to 4.1 m (8.2 to 13.5 ft.).
• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius of more
than approximately 200 m (656 ft.).
• No system malfunctions are detected. ( P. 666)
• Vehicle does not accelerate or de celerate by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for changing
lanes.
• ABS, VSC, TRC and PCS are not operating.
• TRC or VSC is not turned off.
• Except for Israel: Hands off steering wheel alert ( P. 321) is not displayed.
• Lane departure control function is not operating.

3214-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Temporary cancellation of functions
When operation conditions are no longer met, a function may be temporarily canceled. However, when the operation conditions are met again, operation of the function is auto-
matically restored. ( P. 320)
■Lane departure control function/lane-keeping assist function
Depending on the vehicle speed, lane departure situation, road conditions, etc., the
operation of the functions may not be reco gnized or the functions may not operate.
■Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio playback, etc.
Also, it may be difficult to feel steering wh eel vibrations due to the road conditions, etc.
■Hands off steering wheel alert
Except for Israel: When the system determines that the driver has removed their hands
from the steering wheel while the lane departure control function or lane-keeping assist function is operating, a warning message is displayed on the multi-information display. If the driver continues to keep their hands off of the steering wheel, the buzzer sounds, a
warning message is displayed and the function is temporarily canceled. This alert also operates in the same way when the vehicle is driven with the steering wheel lightlygripped. However, depending on the road conditions, etc., the function may not cancel.
For Israel: When the system determines that the driver has removed their hands from the steering wheel while the lane departure contro l function or lane-keeping assist function is operating, a warning message is displaye d on the multi-information display and the
buzzer sounds.
■White (yellow) lines are only on one side of road
The LKA system will not operate for the side on which white (yellow) lines could not be
recognized.

3404-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the detecting of the sensor
■Conditions under which the vehicle-to-vehicle distance control mode may not function
correctly
In the case of the following conditions, op erate the brake pedal (or accelerator pedal, depending on the situation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system may not operate properly.
●When the vehicle ahead of you decelerates suddenly
●When your vehicle is pointing upwards(caused by a heavy load in the luggage com-
partment, etc.)
●Preceding vehicle has an extremely high
ground clearance
●When the road curves or when the lanes are narrow
●When steering wheel operation or your posi-tion in the lane is unstable

3494-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Operating conditions
●The Stop & Start system is operational when all of the following conditions are met:
• The brake pedal is being depressed firmly. (Except when the vehicle comes to a controlled stop while driving with the dyna mic radar cruise control with full-speed
range in vehicle-to-vehicle distance control mode [if equipped])
• The shift lever is in D or M.
• is off.
• The driver's seat belt is fastened.
• The engine is adequately warmed up.
• The driver's door is closed.
• The accelerator pedal is not being depressed.
• The outside temperature is -5°C (23°F) or higher.
• The hood is closed.
●In the following situations the engine may not be stopped by the Stop & Start system.
This is not a malfunction of the Stop & Start system.
• The air conditioning system is being used when the ambient temperature is high or
low.
• The battery is not sufficiently charged, such as if the vehicle has been parked for a long time and the battery charge has decreased, the electric load is large, the bat-
tery temperature is excessively low or the battery has deteriorated, or is undergoing
a periodic recharge.
• The brake booster vacuum is low.
• The vehicle is stoppe d on a steep incline.
• The steering wheel is being operated.
• Due to traffic or other circumstances the vehicle is being stopped repeatedly.
• The vehicle is being driven in a high altitude area.
• Engine coolant temperature or transmissi on fluid temperature is extremely low or
high.
• The battery fluid temperature is extremely low or high.
• For a while after the battery terminals have been disconnected and reconnected.
• For a while after the battery replacement.
●In the following situations, the engine will re start automatically if the engine is stopped
by the Stop & Start system. (To enable stoppi ng of the engine by the Stop & Start sys-
tem, drive the vehicle.)
• The air conditioning system is turned on.
• is turned on.
• The steering wheel is operated.
• The shift lever is shifted to a position other than D or M.
• The driver's seat belt is unfastened.
• The driver's door is opened.
• The accelerator pedal is depressed.
• The Stop & Start cancel switch is pressed.
• The vehicle starts to roll on an incline.

3524-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Multi-information display messages
If the following situations, and a message may be displayed on the multi-information
display.
●When the engine cannot be stopped by the Stop & Start system
MessageDetails
“Depress Brake
Firmly to Activate”
The brake pedal is not depressed enough.
If the brake pedal is depressed further, the system
will operate.
“For Climate Control”
• The air conditioning system is being used when the ambient temperature is high or low.
If the difference between the set temperature and
cabin temperature is small, the system will be
enabled.
• is ON.
“Battery Charging”
• The battery charge amount may be low. Engine stop is temporarily prohibited to prioritize
charging of the battery, but if the engine is operated
for a short while, engine stop is allowed.
• A refresh charge may be occurring, such as when the battery is undergoing a periodic recharge, for a
while after the battery terminals have been discon-
nected and reconnected, for a while after the bat-
tery has been replaced, etc.
After a refresh charge of approximately 5 to 60 min-
utes completes, the system can be operated.
• If the message is displayed continuously (more than 60 minutes), the battery may be deteriorated. Con-
tact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional for
details.
“For Brake System”
• The vehicle is being driven in a high altitude area.
• The brake booster vacuum is low. When the brake booster vacuum reaches a prede-
termined level, the system will be enabled.
“Steering Wheel
Turned”
The steering wheel has been operated.
“Driver Seat Belt
Unbuckled”
The driver seat belt is not fastened.
“Stop & Start Unavail-
able”
• The Stop & Start system is temporarily disabled. Operate the engine for a short while.
• The engine may have been started with the hood open.
Close the hood, turn the engine switch off, wait for
30 seconds or more, and then start the engine.