Lexus NX (2022 year). Manual in english — page 26
The actual vehicle-to-vehicle distance varies in accordance with the vehicle speed. Also,
when the vehicle is stopped by system control, it will be stopped at a certain distance from
the preceding vehicle, depending on the situation, regardless of the setting.
Approach warning
In situations where the vehicle approaches a preceding vehicle and the system
cannot provide sufficient deceleration, such as if a vehicle cuts in front of the
vehicle, a warning display will flash and a buzzer will sound to alert the driver.
Depress the brake pedal to ensure appropriate vehicle-to-vehicle distance.
■
Warnings may not occur when
In the following situations, the warning may not operate even though the vehicle-
to-vehicle distance is short.
●
When the preceding vehicle is traveling at the same speed or faster than your
vehicle
●
When the preceding vehicle is traveling at an extremely low speed
●
Immediately after the vehicle speed has been set
●
When the accelerator pedal is depressed
Curve speed reduction function
When a curve is detected, the vehicle speed will
begin being reduced. When the curve ends, the
vehicle speed reduction will end.
Depending on the situation, the vehicle speed will
then return to the set vehicle speed.
In situations where vehicle-to-vehicle distance control
needs to operate, such as when a preceding vehicle
cuts in front of your vehicle, the curve speed reduction
function will be canceled.
INFORMATION
■
Situations in which the curve speed reduction function may not operate
In situations such as the following, the curve speed reduction function may not operate:
●
When the vehicle is being driven around a gentle curve
●
When the accelerator pedal is being depressed
●
When the vehicle is being driven around an extremely short curve
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■
Changing the settings of the curve speed reduction function
Various settings of the curve speed reduction function can be changed through custom-
ize settings.
Overtaking prevention function
If a detected vehicle in the passing lane is traveling slower than your vehicle,
overtaking will be suppressed.
The overtaking prevention function will not operate if the passing lane is congested or
vehicles are traveling at low speeds. This function is not available for vehicles without a
DCM.
Support for lane change
If your vehicle is being driven at approximately 80 km/h (50 mph) or more and
a lane change to the passing lane is performed, when the turn signal lever is
operated and the lane is changed, the vehicle will accelerate up to the set speed to
assist in overtaking.
For vehicles with a DCM: The system’s recognition of which lane is the passing lane is
determined by location information and the driving condition of surrounding vehicles. The
support for lane change function and overtaking prevention function may not operate if it is
difficult to obtain location information or there are few surrounding vehicles.
For vehicles without a DCM: The system’s recognition of which lane is the passing lane
may be based solely on the location of the steering wheel in the vehicle (left-hand drive/
right-hand drive). If the vehicle is driven in a location where the passing lane is on the
opposite side of that where the vehicle was originally sold, the vehicle may accelerate
when the turn signal lever is operated away from the passing lane. (e.g. The vehicle was
manufactured for a right-hand traffic location, but is being driven in a left-hand traffic
location. The vehicle may accelerate when the turn signal lever is operated to the right.)
If your vehicle is being driven at approximately 80 km/h (50 mph) or more and the lane is
changed to that with a vehicle traveling slower than your vehicle, when the turn signal lever
is operated the vehicle will gradually decelerate to assist in changing lanes.
Dynamic Radar Cruise Control with Road Sign Assist
Vehicles without a head-up display: When RSA function is enabled and the dynam-
ic radar cruise control system is operating, if a speed limit sign is detected, the
detected speed limit will be displayed with an up/down arrow. The set speed can
be increased/reduced to the detected speed limit by pressing and holding the
[+RES] switch or [ - ] switch.
* :
If equipped
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Vehicles with a head-up display: When RSA function is enabled and the dynamic
radar cruise control system is operating, if a speed limit sign is detected, the
detected speed limit will be displayed with an up/down arrow. The set speed can
be increased/reduced to the detected speed limit by pressing and holding the [+]
switch or [ - ] switch.
■
When the set speed is lower than the detected speed limit
▶
Vehicles without a head-up display
Press and hold the [+RES] switch.
▶
Vehicles with a head-up display:
Press and hold the [ + ] switch.
■
When the set speed is higher than the detected speed limit
Press and hold the [ - ] switch.
■
Enabling/disabling the dynamic radar cruise control with road sign assist
The dynamic radar cruise control with road sign assist can be enabled/disabled
through a customize setting.
▶
Vehicles without a head-up
display
▶
Vehicles with a head-up dis-
play
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INFORMATION
■
The dynamic radar cruise control with road sign assist may not operate properly
when
As the dynamic radar cruise control with road sign assist may not operate properly in
situations where the RSA may not operate or cannot detect signs correctly
,
when using this function, make sure to confirm the actual speed limit.
Vehicles without a head-up display: In the following situations, the set speed may not
change to the detected speed limit by pressing and holding the [+RES] switch or [ - ]
switch:
Vehicles with a head-up display: In the following situations, the set speed may not change
to the detected speed limit by pressing and holding the [ + ] switch or [ - ] switch:
●
When speed limit information is not available
●
When the detected speed limit is the same as the set speed
●
When the detected speed limit is outside of the speed range which the dynamic radar
cruise control system can operate
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Cruise Control
Cruise control
The vehicle can be driven at a set speed even if the accelerator pedal is not
depressed.
Use the cruise control only on highways and expressways
WARNING
■
For safe use
●
Driving safely is solely the responsibility of the driver. Therefore, do not overly rely
on this system. The driver is solely responsible for paying attention to the vehicle’s
surroundings and driving safely.
●
Set the speed appropriately according to the speed limit, traffic flow, road conditions,
weather conditions, etc. The driver is responsible for confirming the set speed.
■
Situations in which cruise control should not be used
Do not use the cruise control in the following situations. As the system will not be able to
provide appropriate control, using it may lead to an accident resulting in death or serious
injury.
●
On roads with sharp bends
●
On winding roads
●
On slippery roads, such as those covered 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.
●
When it is necessary to disable the system:
System Components
■
Meter display
A
Set vehicle speed
B
Cruise control indicator
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Switches
▶
Vehicles without a head-up display:
A
Driving assist mode select switch
B
Driving assist switch
C
[+RES]switch
D
[ - ]switch
E
Cancel switch
▶
Vehicles with a head-up display:
A
The function of each switch differs depend-
ing on the conditions and settings.
When a switch is touched, the function of each
switch is displayed on the head-up display. If
the head-up display is off, the functions will be
displayed on the multi-information display.
B
Driving assist mode select switch
C
Driving assist switch
D
[RES]switch
E
[ + ]switch
F
[ - ]switch
G
Cancel switch
Using the cruise control
Setting the vehicle speed
1
Press the driving assist mode select switch to
select cruise control.
The cruise control indicator will illuminate.
▶
Vehicles without a head-up
display
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2
Using the accelerator pedal, accelerate to
the desired vehicle speed (approximately 30
km/h [20 mph] or more), and press the driv-
ing assist switch to set the set vehicle speed.
The vehicle speed at the moment the switch is re-
leased will be the set vehicle speed.
Adjusting the set vehicle speed
■
Adjusting the set vehicle speed using the switches
●
Vehicles without a head-up display: To change the set vehicle speed, press the
[+RES] or [ - ] switch until the desired speed is displayed.Vehicles with a head-up
display: To change the set vehicle speed, press the [ + ] or [ - ] switch until the
desired speed is displayed.
▶
Vehicles without a head-up display
▶
Vehicles with a head-up dis-
play
▶
Vehicles without a head-up
display
▶
Vehicles with a head-up dis-
play
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▶
Vehicles with a head-up display
1
Increase set vehicle speed
2
Decrease set vehicle speed
The set vehicle speed will increase or decrease as follows:
Fine adjustment: By 1 km/h (0.6 mph) or 1 mph (1.6 km/h) each time the switch
is pressed
Large adjustment: Increases continuously while the switch is pressed and held
■
Increasing the set vehicle speed using the accelerator pedal
1
Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.
2
Vehicles without a head-up display: Press the [+RES] switch. Vehicles with a
head-up display: Press the [ + ]switch
Canceling/resuming control
1
Press the cancel switch or driving assist
switch to cancel control.
Control will also be canceled if the brake pedal is
depressed.
▶
Vehicles without a head-up
display
▶
Vehicles with a head-up dis-
play
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2
Vehicles without a head-up display: Press the [+RES] switch to resume con-
trol.Vehicles with a head-up display: Press the [RES] switch to resume control.
Automatic cancellation of the cruise control
In the following situations, the cruise control will be canceled automatically:
●
When the vehicle speed drops approximately 16 km/h (10 mph) or more
below the set vehicle speed
●
When the vehicle speed drops below approximately 30 km/h (20 mph)
●
When the brake control or output restriction control of a driving support
system operates (For example: PCS, drive-start control)
●
When the parking brake has been operated
●
Situations in which some or all of the functions of the system cannot
operate:
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Emergency Driving Stop System
Emergency Driving Stop System
The emergency driving stop system is a system which automatically decelerates
and stops the vehicle within its lane if the driver becomes unable to continue
driving the vehicle, such as if they have suffered a medical emergency, etc.
During LTA (Lane Tracing Assist) control, if the system does not detect driving
operations, such as if the driver is not holding the steering wheel, and determines
the driver is not responsive, the vehicle will be decelerated and stopped within its
current lane to help avoid a collision or reduce the impact of a collision.
WARNING
■
For safe use
●
Driving safely is solely the responsibility of the driver. Pay careful attention to the
surrounding conditions in order to ensure safe driving. The emergency driving stop
system is designed to provide support in an emergency where it is difficult for the
driver to continue driving, such as if they have had a medical emergency. It is not
designed to support driving while drowsy or in poor physical health, or inattentive
driving.
●
Although the emergency driving stop system is designed to decelerate the vehicle
within its lane to help avoid or help reduce the impact of a collision if the system
determines that it is difficult for the driver to continue driving, its effectiveness may
change according to various conditions. Therefore, it may not always be able to
achieve the same level of performance. Also, if the operating conditions are not met,
this function will not operate.
●
After the emergency driving stop system operates, if driving becomes possible again,
immediately begin driving again or, if necessary, park the vehicle on the shoulder of
the road and set a warning reflector and flare to warn other drivers of your stopped
vehicle.
●
After this system operates, passengers should attend to the driver as necessary and
take appropriate hazard prevention measures, such as moving to a place where safety
can be ensured, such as the shoulder of the road or behind a guardrail.
●
This system detects the condition of the driver through the operation of the steering
wheel. This system may operate if the driver is aware but intentionally and continuously
does not operate the vehicle. Also, the system may not operate if it cannot determine
that the driver is not responsive, such as if they are leaning on the steering wheel.
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Summary of the system
Operation of this system is separated into 4 control states. Through control state
"warning phase 1" and "warning phase 2", the system determines if the driver
is aware and responsive while outputting a warning and controlling the vehicle
speed. If the system determines the driver is not responsive, it will operate in
control state "deceleration stop phase" and "stop hold phase" and decelerate and
stop the vehicle. It will then operate continuously in "stop hold phase".
INFORMATION
■
Operating conditions
This system operates when all of the following conditions are met:
●
When the LTA is on
●
When the vehicle speed is approximately 30 mph (50 km/h) or more
■
Operation cancelation conditions
In the following situations, system operation will be canceled:
●
When LTA control has been canceled (the LTA switch has been pressed, etc.)
●
When the dynamic radar cruise control has been canceled
●
When driver operations are detected (the steering wheel is held, the brake pedal,
accelerator pedal, parking brake, hazard light switch, or turn signal lever is operated)
●
When the driving assist switch is pressed while in the stop and hold phase
●
When the engine switch has been turned from ON to OFF
●
Situations in which some or all of the functions of the system cannot operate:
■
LTA control when operation is canceled
When emergency driving stop system operation is canceled, LTA control may also be
canceled.
Warning phase 1
If driving operations are not detected after the hands off steering wheel warning
operates, a buzzer will sound intermittently and a message will be displayed to
warn the driver, and the system will judge if the driver is responsive or not. If driving
operations, such as holding the steering wheel, are not performed within a certain
amount of time, the system will enter warning phase 2.
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Warning phase 2
After entering warning phase 2, a buzzer will sound in short intervals and a
message will be displayed to warn the driver, and the vehicle will slowly decelerate
to approximately 50 km/h (30 mph).
If driving operations, such as holding the steering wheel, are not performed within
a certain amount of time, the system will determine that the driver is not responsive
and enter the deceleration stop phase.
The audio system will be muted until the driver becomes responsive.
When the vehicle is decelerating, the brake lights may illuminate, depending on the road
conditions, etc.
After the vehicle has decelerated a certain amount, the emergency flashers (hazard lights)
will flash.
Deceleration stop phase
After the driver is judged as being not responsive, a buzzer will sound continuously
and a message will be displayed to warn the driver, and the vehicle will slowly
decelerate and stop. While the vehicle is decelerating, the emergency flashers
(hazard lights) will flash to warn other drivers of the emergency.
Stop hold phase
After the vehicle is stopped, the parking brake will be applied automatically. After
entering the stop and hold phase, the buzzer will continue sounding continuously,
the emergency flashers (hazard lights) will flash to warn other drivers of the
emergency, and the doors will unlock.
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Engine output restriction when the accelerator pedal and brake pedal
are depressed at the same time
Purpose of the brake override system
If the accelerator pedal and brake pedal are depressed at the same time, the brake
override system may operate and restrain the engine output. A warning message is
displayed on the multi-information display while the system is operating.
WARNING
To avoid depressing the wrong pedal, become familiar with the location of the brake
pedal and accelerator pedal before driving the vehicle.
If the accelerator pedal is mistaken for the brake pedal and depressed, the vehicle may
suddenly start off.
NOTICE
Do not depress the accelerator pedal and brake pedal at the same time while driving, as
this may cause the engine output to be restrained.
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Sudden start restraint control
Sudden start restraint control (Drive-Start Control [DSC])
When the following unusual operation is performed with the accelerator pedal
depressed, the engine output may be restrained.
●
When the shift lever is shifted to R
1
●
When the shift lever is shifted from P or R to forward drive shift positon such as
D
1
When the system operates, a message appears on the multi-information display.
Read the message and follow the instruction.
A warning light comes on while the system is operating.
INFORMATION
■
Drive-Start Control (DSC)
When the TRC is turned off, sudden start restraint control also does not operate.
If your
vehicle have trouble escaping from the mud or fresh snow due to sudden start restraint
control operation, deactivate TRC so that the vehicle may become able to escape from
the mud or fresh snow.
Also, sudden start restraint control will not operate in the following conditions:
●
When Trail Mode is turned on
Related Links
Driving assist systems(P. 325)
*1 :
Depending on the situation, the shift position may not be changed.
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Reducing impact to the occupants in a collision
Reducing impact to passengers in a collision
Seat belt pretensioners
When the vehicle is subjected to a severe frontal or side impact, the pretensioners
retract the seat belts of the front seats and rear outer seats to securely restrain the
occupants.
The pretensioners will not operate in minor frontal or side impacts, rear impacts, or vehicle
rollovers.
INFORMATION
■
Replacing the belt after the pretensioner has been activated
If the vehicle is involved in multiple collisions, the pretensioner will activate for the first
collision, but will not activate for the second or subsequent collisions.
■
PCS-linked control
If the PCS (Pre-Collision System) determines that the possibility of a collision with a
vehicle is high, the seat belt pretensioners will be prepared to operate.
WARNING
■
Seat belt pretensioners
If a pretensioner has operated, the SRS warning light will illuminate.
In this situation, the seat belt cannot be used and must be replaced by any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
Failure to do so may result in death or serious injury.
SRS airbags
The SRS airbags deploy when the vehicle is subjected to certain types of severe
impact that may cause significant injury to the occupants. The airbags work togeth-
er with the seat belts to help reduce the risk of death or serious injury.
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A
SRS driver airbag/front passenger airbag
Help reduce impact to the head and chest of the driver and front passenger
B
SRS knee airbags
Help reduce impact to the driver and front passenger
C
SRS side airbags
●
Help reduce impact to the chest of the occupants of the front seats
D
SRS curtain shield airbags
Help reduce impact to the heads of the occupants of the front and rear outer seats
E
SRS front center airbags
Help reduce impact to the head and neck of the occupants of the front seats
The main SRS airbag system components are shown above. The SRS airbag
system is controlled by the airbag sensor assembly. As the airbags deploy, a
chemical reaction in the inflators quickly fills the airbags with non-toxic gas to help
restrain the motion of the occupants.
INFORMATION
■
If the SRS airbags deploy (inflate)
●
Slight abrasions, burns, bruising, etc., may be sustained from SRS airbags, due to the
extremely high speed of deployment (inflation) by hot gases.
●
A loud noise and white powder will be emitted.
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