2015 LEXUS NX300h Owners Manual

2734-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U ■
Steering control function
In addition to the operation conditions for the lane deviation alert function,
when all of the following condit ions are fulfilled, it operates.●
When settings for the “Steering Assist” in the “Settings display” of the multi-
information display is set to “On” (  P. 2 76 )●
When the vehicle has not slowed down more than a defined setting. ●
When the steering wheel is operated wi th a steering force level that is not
equivalent to changing lanes. ●
When the ABS, VSC, TRAC, or PCS (if equipped) is not operating. ●
When intentional accelerator peda l operations are not performed.■
Lane deviation alert function
In any of the following cases, the lane deviation alert function will be tempo-
rarily canceled. When the conditions, in which the cancelation occurred
improves, the function will resume operations. ●
The vehicle speed deviates from the operating ranges of the function ●
The turn signal lever is operated ●
When the emergency flashers are operated ●
When the lane markers cannot be recognized while driving ●
When the system malfunctions ●
Immediately after the lane deviation alert operates
The lane deviation alert function will not operate again for a several sec-
onds after it has been activated, even if the vehicle leaves the lane again. ●
When more than half of the vehicle body straddles the lane■
Steering control function
In addition to the temporary cancelation conditions of the lane deviation alert
function, in any of the following cases the steering control function is tempo-
rarily canceled. When the conditions for which the cancelation occurred
improves, the function will restart operations. ●
When the vehicle has slowed down more than a defined setting.●
When the steering wheel is operated with a steering force level that is
equivalent to changing lanes. ●
When the ABS, VSC, TRAC, or PCS (if equipped) is operating. ●
When intentional accelerator pe dal operations are performed.●
Operations of the VSC and TRAC have been turned off (  P. 3 0 7 )Temporary cancelation of the functions

274 4-5. Using the driving support systems
NX300h_U_OM78007U When it is judged that there is a malfun ction in the system relating to steering
control function, the steering control function is canceled and “LDA Steering
Assist Deactivated Warnings Available” is displayed on the multi-information dis-
play. However, it is possible that the lane deviation alert function operates.
When the steering control function is canc eled, it will not return unless “Steering
Assist” is turned “On” again from the “S ettings display” of the multi-information
display (  P. 276) or the LDA switch is turned on again.
When the both lane lines turn white:
Indicates that both right and left lane
markers are recognized. If the vehicle deviates from the traffic
lane, the lane displa y on the side the
vehicle has deviated from will flash in
orange. (  P. 2 7 1 )
When the either lane line turns white:
Indicates that the lane marker on the
white-marked side is recognized. If the vehicle deviates from the side of a
lane with recognized lane markers, the
lane line will flash in orange. (  P. 2 7 1 )
When the inside of both lane lines are
black:
Indicates that no lane markers are rec-
ognized or the LDA is temporarily can-
celed.When the steering cont rol function was canceled
Indication on the multi-information display

2754-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U In steering control, the steering control
indicator will come on. ■
If “Lane Departure Alert Malfunction Visit Yo ur Dealer” is displaye d on the multi-infor-
mation display
Even if the LDA switch is pressed, when th e LDA indicator does not come on the system
may have a malfunction. Have the vehicle in spected by your Lexus dealer immediately.■
The steering control function
There are cases where it may be difficult to sense the steering force on the steering
wheel by the steering control, according to speed, the deviatio n situation, conditions of a
road, etc. ■
Alert buzzer for lane deviation alert
Depending on the audio system sound level or air conditioning fan noise while the audio
system or air conditioning system is in use, it may be difficult to hear the alert buzzer.■
After the vehicle has been parked in the sun
The LDA may not be available and a warning message will be displayed for a while after
driving has started. When the temperature in the cabin decreases and the temperature
around the lane recognition camera (  P. 270) becomes suitable for its operation, turn
the LDA switch on again after a short time. ■
If there are lane markers on only one side of the vehicle
The lane deviation alert will not operate for the side on which lane markers could not be
recognized. ■
Conditions in which the functi on may not operate correctly
In the following situations, the lane recognition camera may be unable to recognize lane
markers causing the lane deviation alert function to operate incorrectly. However, this
does not indicate a malfunction. ●
When there are shadows on the road running parallel with lane mark ers, or if a shadow
covers the lane markers ●
When driving through an area with no lane markers, such as a toll booth, a crossing or
before a ticket checkpoint ●
When the lane markers are broken, Botts’ dots (raised pavement markers) or stones ●
When lane markers are obscured or partially obscured by sand, dirt, etc. ●
When driving on a road surface that is wet du e to rain, previous rainfall, standing water,
etc. ●
When the lane markers are yellow (These may be more difficult for the system to rec-
ognize compared to white markers.)Display while in steering control

276 4-5. Using the driving support systems
NX300h_U_OM78007U ●
When the lane markers are on a curb, etc. ●
When driving on a particularly brig ht road surface, such as concrete●
When driving on a road surface that is bright due to reflected light ●
When driving in a location wh ere the light level changes rapi dly, such as the entrance to
or exit from a tunnel ●
When sunlight or the headlights of oncoming vehicles are shining directly into the cam-
era lens ●
When driving on roads that are branching or merging ●
When driving on a hill ●
When driving on winding roads or roads that are uneven ●
When driving on rough or unpaved roads ●
When driving on a sharp curve ●
When lane markers are extremely narrow or extremely wide ●
When the vehicle leans to one side an unus ual amount due to a heavy load or improper
tire inflation pressure ●
When the following distance between your vehicle and the vehicle ahead is extremely
short ●
When the vehicle experiences strong up-and -down motion such as when driving on an
extremely rough road or on a seam in the pavement ●
When headlight brightness at nighttime is reduced due to dirt on the lenses, or when
the headlights are misaligned ●
When receiving a side wind ■
When changing the tires
Depending on the tires used, sufficient performance may not be maintainable.■
Warning messages for the LDA
Warning messages are used to indicate a syst em malfunction or to inform the driver of
the need for caution while driving. If a wa rning message is shown on the multi-informa-
tion display, read the message and follow the instructions.
Also, even if a warning message is displayed, it will not impede normal driving. ■
When turning on/off the steering control function
From “Settings display” (  P. 103) of the multi-information display, the steering
control function can be turned on/off.
Pressing the or meter control switches (  P. 103), selects
With each press of meter control switch es, the control switches between “On” and
“Off” ■
Sensitivity adjustment for th e lane deviation alert buzzer
From
“Settings display” (  P. 103) of the multi-inform ation display, the alert sen-
sitivity for the alert buzzer when deviating from the lane can be adjusted.
Pressing the or meter control switches (  P. 103), selects
With each press of meter control switches, the control switches between “High”
and “Standard” 1
2
1
2

2774-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U WA R N I N G ■
Before using the LDA
Do not over rely on the LDA. The LDA does not drive the vehicle automatically, nor
does it reduce the amount of care you need to take. As such, the driver must always
assume full responsibility for understandin g his/her surroundings, for operating the
steering wheel to correct the driving line, and for driving safely. Also, take occasional
rests from fatigue due to driving over long periods of time, etc.
Inappropriate or negligent driving co uld lead to an unexpected accident.■
Do not drive without holding the steering wheel
While the steering control function is operating, when the system judges that the vehi-
cle is being driven without holding the steering wheel, a warning message is displayed.
(  P. 2 7 1 )
Inappropriate steering wheel operations and/or negligent driving could lead to an
unexpected accident. When driving, firmly ho ld the steering wheel and keep safe driv-
ing in mind. ■
To avoid operating the LDA by mistake
Switch the LDA off using the LDA switch when not in use. (  P. 2 7 2 )■
Situations unsuitable for LDA
Do not use the LDA in any of the following situations.
Otherwise, the system may not function correctly and could result in an accident. ●
When driving with snow tires, tire ch ains, a spare tire, or similar equipment●
When a tire with a different structure, maker, brand, or tread pattern is used. ●
When remain tread of the tire or the air pressure is insufficient●
When restructuring the suspension ●
When there are objects or structures along the roadside that might be misinterpreted
as lane markers (such as guardrails, a curb, reflector posts, etc.) ●
When driving on snowy roads ●
When pavement lane markers are difficult to see due to rain, snow, fog, sand, dust,
etc. ●
When there are visible lines on the pavement from road repairs, or if the remains of
old lane markers are still visible on the road ●
When driving on a road with lane closures due to maintenance, or when driving in a
temporary lane ●
When driving on road surfaces that are slippery from rain, snow, etc.●
When driving in traffic lanes other than highways and freeway ●
When driving through construction areas

278 4-5. Using the driving support systems
NX300h_U_OM78007U NOTICE ■
To prevent damage to or incorrect operation of the LDA
Observe the following to ensure that the LDA system functions correctly●
Do not modify the headlights or attach stickers to the surface of the lights. ●
Do not modify the suspension or replace it with non-genuine parts.●
Do not install or place anything on the hood or the grille. Also, do not install a grille
guard (bull bars, kangaroo bar, etc.). ●
If your windshield needs repair s, contact your Lexus dealer.●
Do not overload with luggage ■
Lane recognition camera
Observe the following to ensure that the LDA system functions correctly●
Keep the windshield clean at all times.
Performance could be affected if the windshie ld is dirty, or if raindrops, condensation
or ice are adhering to the windshield.
●
Do not spill liquids onto the lane recognition camera. ●
Do not attach window tinting to the windshield. ●
Do not install an antenna in fron t of the lane recognition camera.●
If the windshield area in fr ont of the lane recognition camera is fogged up, use the
windshield defogger to remove the fog from that area. (  P. 4 3 5 )
When it is cold, using the he ater with air blowing to the feet may allow the upper part
of the windshield to fog up. This will have a negative effect on the images.●
Do not scratch the camera lens, or let it get dirty.
When cleaning the inside of the windshield , be careful not to get any glass cleaner,
etc., on the lens. Also, do not touch the lens.
For lens repair, contact your Lexus dealer. ●
Do not change the installation position or direction of the lane recognition camera or
remove it.
The direction of the lane recognit ion camera is precisely adjusted.●
Do not subject the lane recognition camera to strong impact or force, and do not dis-
assemble the lane recognition camera. ●
Do not replace windshield wi th non-genuine windshield.
Contact your Lexus dealer. ●
Do not attach a sticker or other items to the
windshield near the lane recognition camera.

2794-5. Using the driving support systems
4
Driving
NX300h_U_OM78007UIntuitive parking assist 
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
Turns the intuitive parking assist on/off
When on, the indicator light comes on
to inform the driver that the system is
operational.
 : If equippedThe distance from your vehicle to near by obstacles when parallel parking or
maneuvering into a garage is measure d by the sensors and communicated via
the displays and a buzzer. Always chec k the surrounding area when using this
system.
Types of sensors 1
2
3
4
Intuitive parking assist switch

280 4-5. Using the driving support systems
NX300h_U_OM78007U When the sensors detect an obstacle, the following displays inform the driver of
the position and distance to the obstacle. ■
Multi-information display
Front corner sensor operation
Front center sensor operation
Rear corner sensor operation
Rear center sensor operation■
Lexus Display Audio or navigation system screen
Intuitive parking assist displayWhen the Lexus parking assist moni-
tor is not displayed.
A graphic is automatically displayed
when an obstacle is detected. The
screen can be set so that the graphic
is not displayed. (  P. 2 8 3 )
: Select to mute the buzzer
sounds.
Insert display When the Lexus parking assist moni-
tor is displayed.
A simplified image is displayed on
the right upper corner of the Lexus
Display Audio and the navigation
system screen when an obstacle is
detected.Display 1
2
3
4
1
2