2018 LEXUS NX300h Owners Manual

2174-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving For how to change settings, refer to P.419.
DisplaySteering control
function Turn steering wheel
assistance on and off
Vehicle sway warn-
ing function Turn function on and
off
Adjust alert sensitiv-
ityFunction Setting details
Dynamic radar cruise con-
trol with full-speed range In vehicle-to-vehicle distance con-
trol mode, the ve hicle automati-
cally accelerates, decelerates and
stops to match the speed changes
of the preceding vehicle even if the
accelerator pedal is not depressed.
In constant speed control mode,
the vehicle runs at a fixed speed.
Use the dynamic radar cruise con-
trol with full-speed range on free-
ways and highways.
 Vehicle-to-vehicle distance con-
trol mode ( → P.219)
 Constant speed control mode
( → P.224)
System Components
A

218 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U Set speed
Indicators
Vehicle-to-vehicle distance switch
Cruise control switch WARNING■
Before using dynamic radar cruise
control with full-speed range
Driving safely is the sole responsibility of
the driver. Do not rely solely on the sys-
tem, and drive safely by always paying
careful attention to your surroundings.
The dynamic radar cruise control with
full-speed range provides driving assis-
tance to reduce the driver’s burden.
However, there are limitations to the
assistance provided.
Set the speed appropriately depending
on the speed limit, traffic flow, road con-
ditions, weather conditions, etc. The
driver is responsible for checking the set
speed.
Even when the system is functioning nor-
mally, the condition of the preceding
vehicle as detected by the system may
differ from the condition observed by the
driver. Therefore, the driver must always
remain alert, assess the danger of each
situation and drive safely. Relying on this
system or assuming the system ensures
safety while driving can lead to an acci-
dent, resulting in death or serious injury.
■
Cautions regarding the driving assist
systems
Observe the following precautions, as
there are limitations to the assistance
provided by the system.
Failure to do so may cause an accident
resulting in death or serious injury. B
C
D
E ●
Assisting the driver to measure follow-
ing distance
The dynamic radar cruise control with
full-speed range is only intended to
help the driver in determining the fol-
lowing distance between the driver’s
own vehicle and a designated vehicle
traveling ahead. It is not a mechanism
that allows careless or inattentive driv-
ing, and it is not a system that can assist
the driver in low-visibility conditions. It
is still necessary for driver to pay close
attention to the vehicle’s surroundings. ●
Assisting the driver to judge proper
following distance
The dynamic radar cruise control with
full-speed range determines whether
the following distance between the
driver’s own vehicle and a designated
vehicle traveling ahead is within a set
range. It is not capable of making any
other type of judgement. Therefore, it
is absolutely necessary for the driver to
remain vigilant and to determine
whether or not there is a possibility of
danger in any given situation. ●
Assisting the driver to operate the
vehicle
The dynamic radar cruise control with
full-speed range has limited capability
to prevent or avoid a collision with a
vehicle traveling ahead. Therefore, if
there is ever any danger, the driver
must take immediate and direct con-
trol of the vehicle and act appropri-
ately in order to ensure the safety of all
involved.
■
To avoid inadvertent dynamic radar
cruise control with full-speed range
activation
Switch the dynamic radar cruise control
with full-speed range off using the “ON/
OFF” button when not in use.

2194-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving
This mode employs a radar sensor to detect the presence of vehicles up to approx-WARNING■
Situations unsuitable for dynamic
radar cruise control with full-speed
range
Do not use dynamic radar cruise control
with full-speed range in any of the follow-
ing situations.
Doing so may result in inappropriate
speed control and could cause an acci-
dent resulting in death or serious injury. ●
Roads where there are pedestrians,
cyclists, etc.●
In heavy traffic●
On roads with sharp bends●
On winding roads●
On slippery roads, such as those cov-
ered with rain, ice or snow●
On steep downhills , or where there
are sudden changes between sharp up
and down gradients
Vehicle speed may exceed the set
speed when driving down a steep hill.●
At entrances to freeways and highways●
When weather conditions are bad
enough that they may prevent the sen-
sors from detectin g correctly (fog,
snow, sandstorm, heavy rain, etc.)
●
When there is rain, snow, etc. on the
front surface of the radar sensor or
camera sensor
●
In traffic conditions that require fre-
quent repeated acceleration and
deceleration
●
When your vehicle is towing a trailer
or during emergency towing
●
When an approach warning buzzer is
heard often
Driving in vehicle-to-vehicle distance control mode

220 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U imately 328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following
distance, and operates to maintain a suit able following distance from the vehicle
ahead. Note that vehicle-to-vehicle distance will close in when tr aveling on downhill slopes.
Example of constant speed cruising
When there are no vehicles aheadThe vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle distance
can also be set by operating the ve hicle-to-vehicle distance switch.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appearsWhen a vehicle is detected running ahead of you, the system automatically decelerates
your vehicle. When a greater reduction in vehicle speed is necessary, the system applies
the brakes (the stop lights will come on at this time). The sy stem 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 th e system cannot decelera te 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, pushing the cruise control lever up or
depressing the accelerator pedal will resume follow-up cruising.
Example of acceleration
When there are no longer any preceding vehicles driving slower than the set
speedThe system accelerates until the set speed is re ached. The system then returns to constant
speed cruising. A
B
C

2214-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving 1 Press the “ON/OFF” button to
activate the cruise control.Radar cruise control indicator will come on
and a message will be displayed on the
multi-information display.
Press the button again to deactivate the
cruise control.
If the “ON/OFF” button is pressed and
held for 1.5 seconds or more, the system
turns on in constant speed control mode.
( → P.224)
2 Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 30 mph (50 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 becomes the set speed.
If the lever is operated while the vehicle
speed is below approximately 30 mph (50
km/h) and a preceding vehicle is present,
the set speed will be adjusted to approxi- mately 30 mph (50 km/h).
To change the set speed, operate the
lever until the desired set speed is dis-
played.
1 Increases the speed (Except when the vehicle has been
stopped by system control in vehicle-to-
vehicle distance control mode)
2 Decreases the speed
Fine adjustment: Momentarily move
the lever in the desired direction.
Large adjustment: Hold the lever up or
down to change the speed, and release
when the desired speed is reached.
In the vehicle-to-vehicle distance con-
trol mode, the set speed will be
increased or decreased as follows: 
For the U.S. mainland, Hawaii
Fine adjustment: By 1 mph (1.6 km/h) *1
or 1 Setting the vehicle speed (vehi-
cle-to-vehicle distance control
mode)
Adjusting the set speed

222 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U km/h (0.6 mph) *2
each time the lever is
operated
Large adjustment: Increases or decreases
in 1 mph (1.6 km/h) *1
or 1 km/h (0.6 mph) *2

increments for as long as the lever is held 
For Canada, Guam and Puerto Rico Fine adjustment: By 1 mph (1.6 km/h) *1
or 1
km/h (0.6 mph) *2
each time the lever is
operated
Large adjustment: Increases or decreases
in 5 mph (8 km/h) *2
or 5 km/h (3.1 mph) *1

increments for as long as the lever is held
In the constant speed control mode
( → P.224), the set speed will be
increased or decreased as follows:
Fine adjustment: By 1 mph (1.6 km/h) *1

or 1 km/h (0.6 mph) *2
each time the
lever is operated
Large adjustment: The speed will con-
tinue to change while the lever is held. *1
: When the set speed is shown in “MPH” *2
: When the set speed is shown in “km/h”
Pressing the switch changes the vehi-
cle-to-vehicle distance as follows: 1 Long
2 Medium
3 Short The vehicle-to-vehicle distance is set auto-
matically to long mode when the power
switch is turned ON mode.
If a vehicle is running ahead of you, the pre-
ceding vehicle mark will also be dis-
played.
Select a distance from the table below.
Note that the distances shown corre-
spond to a vehicle speed of 50 mph
(80 km/h). Vehicle-to-vehicle distance
increases/decreases in accordance
with vehicle speed. When the vehicle is
stopped by system control, the vehicle
stops at a certain vehicle-to-vehicle
distance depending on the situation.Changing the vehicle-to-vehicle
distance (vehicle-to-vehicle dis-
tance control mode) Vehicle-to-vehicle distance set-
tings (vehicle-to-vehicle dis-
tance control mode) A

2234-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving
After the vehicle ahead of you starts
off, push the lever up.
Your vehicle will also resume follow-up
cruising if the accelerator pedal is
depressed after the vehicle ahead of
you starts off. 1 Pulling the lever toward you can-
cels the speed control. The speed control is also canceled when
the brake pedal is depressed.
(When the vehicle has been stopped by
system control, depressing the brake pedal
does not cancel the setting.)
2 Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed. However, when a vehicle ahead is not
detected, cruise control does not resume
when the vehicle speed is approximately
25 mph (40 km/h) or less.
When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the driver.
An example of this would be if another
driver cuts in front of you while you are
following a vehicle. Depress the brake
pedal to ensure an appropriate vehi-
cle-to-vehicle distance.Distance options Vehicle-to-vehicle
distance
Long Approximately 160
ft. (50 m)
Medium Approximately 130
ft. (40 m)
Short Approximately 100
ft. (30 m)
Resuming follow-up cruising
when the vehicle has been
stopped by system control (vehi-
cle-to-vehicle distance control
mode) Canceling and resuming the
speed control
Approach warning (vehicle-to-
vehicle distance control mode)

224 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U ■
Warnings may not occur when
In the following instances, warnings
may not occur even when the vehicle-
to-vehicle distance is small.
 When the speed of the preceding
vehicle matches or exceeds your
vehicle speed
 When the preceding vehicle is trav-
eling at an extremely slow speed
 Immediately after the cruise control
speed was set
 When depressing the accelerator
pedal
When constant speed control mode is
selected, your vehicle will maintain a
set speed without controlling the vehi-
cle-to-vehicle distance. Select this
mode only when vehicle-to-vehicle dis-
tance control mode does not function
correctly due to a dirty radar sensor,
etc.
1 With the cruise control off, press
and hold the “ON/ OFF” button for
1.5 seconds or more.
Immediately after the “ON/OFF” button is
pressed, the radar crui se control indicator will come on. Afterwards , it switches to the
cruise control indicator.
Switching to constant speed control mode
is only possible when operating the lever
with the cruise control off.
2 Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or 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 beco mes the set speed.
Adjusting the speed setting: → P.221
Canceling and resuming the speed setting:
→ P.223
■
Dynamic radar cruise control with full-
speed range can be set when
●
The shift lever is in D or range 4 or higher
of S has been selected.
●
Range 4 or higher of D has been selected
by using the paddle shift switch.Selecting constant speed con-
trol mode