2015 LEXUS NX300h Owners Manual

2654-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U WA R N I N G
■
Conditions under which the vehicle-to-vehic le distance control mode may not func-
tion correctly
Operate the brake pedal (or accelerator pe dal operation depending on the situation)
as necessary in the following conditions as the radar sensor may not be able to cor-
rectly detect vehicles ahead, which may lead to an accident resulting in death or seri-
ous injury.
●
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.)
●
When the road curves or when the lanes are
narrow
●
When steering wheel operation or your posi-
tion in the lane is unstable Accelerate Accelerate Decelerate

266 4-5. Using the driving support systems
NX300h_U_OM78007U WA R N I N G ■
Handling the radar sensor
Observe the following to ensure the dyna mic radar cruise control with full-speed
range can function effectively.
Otherwise, the radar sensor may not detect correctly and could result in an accident. ●
Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or damage
them. ●
Do not subject the sensor or surr ounding area to a strong impact.
If the sensor moves even slightly off positi on, the system may malfunction. If the sen-
sor or surrounding area is subject to a stro ng impact, always have the area inspected
and adjusted by your Lexus dealer. ●
Do not disassemble the sensor. ●
Do not attach accessories or stickers to the sensor, grille cover or surrounding area.●
Do not modify or paint the sensor and grille cover. ●
Do not replace them with non-genuine parts. ●
If the radar sensor needs to be re placed, contact your Lexus dealer.

2674-5. Using the driving support systems
4
Driving
NX300h_U_OM78007UCruise control Use the cruise control to maintain a set speed without operating the accelerator
pedal.
Use the cruise control on freeways and highways.
Indicators
Cruise control switch
Press the “ON/OFF” button to acti-
vate the cruise control. Cruise control indicator will come on.
Press the button again to deactivate the
cruise control.
Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (above
approximately 25 mph [40 km/h])
and push the lever down to set the
speed. Cruise control “SET” indicator will come
on.
The vehicle speed at the moment the
lever is released be comes the set speed.
 : If equippedSummary of functions 1
2
Setting the vehicle speed 1
2

268 4-5. Using the driving support systems
NX300h_U_OM78007U To change the set speed, operate the lever until the desired set speed is obtained.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily move
the lever in the desired direction.
Large adjustment: Hold the lever in the
desired direction.
The set speed will be increase d or decreased as follows:Fine adjustment: By approximately 1 mph (1.6 km/h) each time the lever is operated
Large adjustment: The set speed can be incr eased or decreased co ntinually until the
lever is released.
Pulling the lever toward you cancels
the constant speed control. The speed setting is also canceled when
the brake pedal is depressed.
Pushing the lever up resumes the
constant speed control. However, resuming is available when
the vehicle speed is more than approxi-
mately 25 mph (40 km/h).Adjusting the set speed 1
2
Canceling and resuming the constant speed control 1
2

2694-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U ■
Cruise control can be set when ●
The shift lever is in D or range 4 or higher of S has been selected.●
Vehicle speed is above approximately 25 mph (40 km/h). ■
Accelerating after setting the vehicle speed ●
The vehicle can be accelerated by operating accelerator pedal. After accelerating, the
set speed resumes. ●
Even without canceling the cruise control, the set speed can be increased by first accel-
erating the vehicle to the desired speed and then pushing the lever down to set the new
speed. ■
Automatic cancelation of cruise control
Cruise control is automatically canceled in any of the fo llowing situations.●
Actual vehicle speed falls more than approximately 10 mph (16 km/h) below the set
speed. ●
Actual vehicle speed is below approximately 25 mph (40km/h). ●
VSC is activated. ●
TRAC is activated for a period of time. ●
When the VSC or TRAC system is turned off by pressing the VSC OFF switch. ■
If “Cruise Control Malfunction Visit Your De aler” is displayed on the multi-information
display
Press the “ON/OFF” button once to deactivate the system, and then press the button
again to reactivate the system.
If the cruise control speed cannot be set or if the cruise control cancels immediately after
being activated, there may be a malfunction in the cruise control system. Have the vehi-
cle inspected by your Lexus dealer.
WA R N I N G ■
To avoid operating the cruise control by mistake
Switch the cruise control off using th e “ON/OFF” button when not in use.■
Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accident resulting in death or
serious injury. ●
Roads where there are pede strians, cyclers, etc.●
In heavy traffic ●
On roads with sharp bends ●
On winding roads ●
On slippery roads, such as thos e covered with rain, ice or snow●
On sharp inclines or declines
Vehicle speed may exceed the set speed when driving down a steep hill. ●
When your vehicle is towing a trailer or during emergency towing

270 4-5. Using the driving support systems
NX300h_U_OM78007ULDA (Lane Departure Alert with steering control) While driving on a highway or freeway that has white (or yellow) lane markers
and few curves, a camera, which is located on the upper part of the windshield,
uses this system to recognize the white (yellow) lane markers and when the
driver has deviated from the lane. If the system judges that the vehicle has devi-
ated from the current traffic lane, along with alerting the driver with a buzzer and
indications in the multi-information display, it will provide assistance by operating
the steering wheel to avoid further deviation from the marker lines.
Lane recognition camera
Indicators
Display
LDA switch
 : If equippedSummary of function
1
2
3

2714-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U ◆ Lane deviation alert function
When the system judges that the vehicle is deviating from the current traffic lane,
an alert buzzer sounds and it prompts cautions from the display screen of the
multi-information display. When the alert buzzer sounds, please ch eck the surrounding road situation and
return near the center of the white (yello w) lane markers by safely operating the
steering wheel.
◆ Steering control function
If the system judges that the vehicle has de viated from the current traffic lane, it is
displayed in the multi-information displa y and steering force is supplied to the
steering wheel by the steering control, pr oviding required assistance in steering
wheel operation to avoid further deviation from the marker lines. In order to prevent over relying on the system, when the system does not operate the
steering wheel and driving where hands are lightly supporting the steering wheel
continues, a warning message is displa yed on the multi-information display.Functions included with LDA Alert buzzer
Alert buzzer
In steering control

272 4-5. Using the driving support systems
NX300h_U_OM78007U Press the LDA switch to activate the
LDA. LDA indicator will come on and lane
lines will be displayed on the multi-infor-
mation display.
Press the switch again to deactivate the
LDA.
When the power switch is turned off, the
LDA returns to off.
■
Lane deviation alert function
When the following conditions are satisfied, the function operates.
When the lane deviation alert function operates, lane lines is displayed on the
multi-information display. (  P. 2 74 )●
When the LDA is on. (  P. 2 7 2 )●
When the vehicle speed is approximately32 mph (50 km/h) or more. ●
When the system recognizes white (yellow) lane markers. ●
When the lane width is more than approximately 8.2 ft. (2.5 m). ●
When turn signal lever is not operating. ●
When the emergency flashers are not operating. ●
When driving on a straight road or through a curve with a radius of more
than approximately 328 ft. (100 m) ●
When a system abnormality is not detected. (  P. 2 7 5 )Turning the LDA on
Ty p e A Ty p e B
Operating conditions for each function