cruise control LEXUS NX300h 2015 User Guide

240 4-5. Using the driving support systems
NX300h_U_OM78007UDynamic radar cruise control Without accelerator pedal operation by the driver, in vehicle-to-vehicle distance
control mode, the vehicle automatically accelerates and decelerates in accor-
dance to the changes in speed of the pr eceding vehicle. In constant speed con-
trol mode, the vehicle runs at a fixed speed.
Use the dynamic radar cruise control on freeways and highways. ●
Vehicle-to-vehicle distance control mode (  P. 2 4 1 )●
Constant speed control mode (  P. 2 4 6 )
Indicators
Display
Set speed
Vehicle-to-vehicle distance button
Cruise control switch
 : If equippedSummary of functions 1
2
3
4
5

242 4-5. Using the driving support systems
NX300h_U_OM78007U Press the “ON/OFF” button to acti-
vate 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.
Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (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 be comes the set speed.Setting the vehicle speed (vehicle-to-vehicle distance control mode) 1
2

2454-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U Pulling the lever toward you cancels
the speed control. The speed setting is also canceled when
the brake pedal is depressed.
Pushing the lever up resumes the
speed control and returns vehicle
speed to the set speed. However, when a vehicle ahead is not detected in vehicle-to-vehicle distance control
mode, cruise control does not resume when the actual vehicle speed is approximately
25 mph (40 km/h) or less. Also, when the vehicle is in constant speed control mode
and the actual vehicle speed is approximately 25 mph (40 km/h) or less, cruise con-
trol does not resume as the set speed is cleared.
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 vehicle-
to-vehicle distance. ■
Warnings may not occur when
In the following instances, there is a po ssibility that the warnings will not occur:●
When the speed of the preceding vehicle matches or exceeds your vehicle
speed ●
When the preceding vehicle is traveling at an extremely slow speed ●
Immediately after the cruise control speed was set ●
When depressing the accelerator pedalCanceling and resuming the speed control 1
2
Approach warning (vehicle-to-vehicle distance control mode)

246 4-5. Using the driving support systems
NX300h_U_OM78007U When constant speed control mode is sele cted, your vehicle will maintain a set
speed without controlling the vehicle-to-vehicle distance. Select this mode only
when vehicle-to-vehicle distance contro l mode does not function correctly due
to dirt, etc.
Press the “ON/OFF” button to acti-
vate the cruise control. Press the button again to deactivate the
cruise control.
Switch to constant speed control
mode.
(Push the lever forward and hold for
approximately 1 second.) Cruise control indicator will come on.
When in constant speed control mode, to return to vehicle-to-vehicle distance con-
trol mode, push the lever forward agai n and hold for approximately 1 second.
After the desired speed has been set, it is not possible to return to vehicle-to-vehicle
distance control mode.
If the power switch is turned off and then turned to ON mode again, the vehicle will
automatically return to vehicle-to-vehicle distance control mode.
Adjusting the speed setting:  P. 2 4 3
Canceling and resuming the speed setting:  P. 2 4 5Selecting constant speed control mode 1
2

2474-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U ■
Dynamic radar 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 30 mph (50 km/h). ■
Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After accelerating, the
set speed resumes. However, during vehicle- to-vehicle distance control mode, the vehi-
cle speed may decrease below the set speed in order to maintain the distance to the pre-
ceding vehicle. ■
Automatic cancelation of vehicle- to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is automatically canceled in the following situ-
ations. “Radar Cruise Control Unavailable” will be displayed on the multi-information
display: ●
Actual vehicle speed falls below approximately 25 mph (40 km/h) when there are no
vehicles ahead. ●
The preceding vehicle leaves the lane when your vehicle is following at a vehicle speed
below 25 mph (40 km/h). Otherwise, the se nsor can not properly detect the vehicle.●
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. ●
The sensor cannot detect correctly because it is covered in some way. ●
The windshield wipers are oper ating at high speed (when the wiper switch is set to the
“AUTO” mode or the high speed wiper operation position). ●
Pre-collision braking is activated.
If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-
son, there may be a malfunction in the system. Contact your Lexus dealer. ■
Automatic cancelation of constant speed control mode
Constant speed control mode is automatica lly canceled in the following situations:●
Actual vehicle speed is more than approximately 10 mph (16 km/h) below the set vehi-
cle speed. ●
Actual vehicle speed falls below approximately 25 mph (40 km/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. ●
Pre-collision braking is activated.

248 4-5. Using the driving support systems
NX300h_U_OM78007U ■
Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle dis-
tance control mode operates properly. (Some obstructions, such as snow, ice and plastic
objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is cancel ed if an obstruction is detected.
■
Warning messages and buzzers for dynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or to inform
the driver of the need for caution while driv ing. If a warning message is shown on the
multi-information display, read the message and follow the instructions.■
Certification for the radar sensor
For vehicles sold in the U.S.A.
FCC ID: HYQDNMWR007
This device complies with part 15 of the FC C Rules. Operation is subject to the following
two conditions: (1) This device may not caus e harmful interference, and (2) this device
must accept any interference received, incl uding interference that may cause undesired
operation.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for compli-
ance could void the user’s authority to operate the equipment.
Radio frequency radiation exposure Information:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.
This equipment should be installed and operated with minimum distance of 20 cm
between the radiator (antenna) and your body.
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter. 
For vehicles sold in Canada
This device complies with Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause
undesired operation of the device.Grille cover
Radar sensor 1
2

2494-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U WA R N I N G ■
Before using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control mode.
Be aware of the set speed. If automatic deceleration/acceleration is not appropriate,
adjust the vehicle speed, as well as the distance between your vehicle and vehicles
ahead by applying the brakes, etc. ■
Cautions regarding the driving assist systems
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury. ●
Assisting the driver to measure following distance
The dynamic radar cruise control is only in tended to help the dr iver in determining
the following distance between the driver’s own vehicle and a designated vehicle
traveling ahead. It is not a mechanism that al lows careless or inattentive driving, 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 determines whether the following distance
between the driver’s own vehicle and a designated vehicle traveling ahead is appro-
priate or not. It is not capable of making an y 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 has no capa bility 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 control of the vehicl e and act appropriately in order to ensure
the safety of all involved. ■
To avoid inadvertent dynamic radar cruise control activation
Switch the dynamic radar cruise control off using the “ON/OFF” button when not in
use.

250 4-5. Using the driving support systems
NX300h_U_OM78007U WA R N I N G ■
Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an accident result-
ing 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. ●
Roads with continuous inclines and declines ●
At entrances to freeways and highways ●
When weather conditions are bad enough that they may prevent the sensors from
detecting correctly (fog, snow, sandstorm, heavy rain, etc.)●
When an approach warning buzzer is heard often ●
When your vehicle is towing a trailer or during emergency towing ■
When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the brake pedal
when deceleration of the system is insuff icient or operate the accelerator pedal when
acceleration is required.
As the sensor may not be able to correctly detect these types of vehicles, the approach
warning (  P. 245) will not be activated, which may lead to an accident resulting in
death or serious injury. ●
Vehicles that cut in suddenly ●
Vehicles traveling at low speeds ●
Vehicles that are not moving in the same lane ●
Vehicles with small rear ends (traile rs with no load on board, etc.)
●
Motorcycles traveling in the same lane ●
When water or snow thrown up by the surrounding vehicles hinders the detecting of
the sensor

252 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 dynami c radar cruise control can function effec-
tively.
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.

2534-5. Using the driving support systems
4
Driving
NX300h_U_OM78007UDynamic radar cruise control  with full-speed
range 
Without accelerator pedal operation by the driver, in vehicle-to-vehicle distance
control mode, the vehicle automatically accelerates, decelerates and stops in
accordance to the changes in speed of th e preceding vehicle. In constant speed
control mode, the vehicle runs at a fixed speed.
Use the dynamic radar cruise control with full-speed range on freeways and
highways. ●
Vehicle-to-vehicle distance control mode (  P. 2 5 4 )●
Constant speed control mode (  P. 2 6 0 )
Indicators
Display
Set speed
Vehicle-to-vehicle distance button
Cruise control switch
 : If equippedSummary of functions 1
2
3
4
5