lane assist MAZDA MODEL 3 SEDAN 2019 User Guide

You may not be able to hear the LDWS
warning sound depending on the
surrounding conditions such as outside
noise.
If you set the LDWS to vibrate the
steering wheel, you may not feel the
vibrations depending on the road
surface conditions.
▼Canceling the System
The LDWS can be set to inoperable.
(If only the LDW
S is turned off)
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(If the LDWS is turned off by
operating the i-ACTIVSENSE switch)
Refer to i-ACTIVSENSE Switch on
page 4-85.
NOTE
When the ignition is switched OFF, the
system status before it was turned off is
maintained. For example, if the ignition is
switched OFF with the LDWS operable,
the LDWS remains operational the next
time the ignition is switched ON.
Blind Spot Monitoring
(BSM)
*
▼Blind Spot Monitoring (BSM)
The BSM is designed to assist the driver in
checking the area to the rear of the vehicle
on both sides during lane changes by
notifying the driver of the presence of
vehicles approaching
from the rear in an
adjacent lane.
BSM operation
The BSM detects vehicles approaching
from the rear while traveling in the
forward direction at a speed of 10 km/h
(6.3 mph) or faster and notifies the driver
by turning on the BSM warning indicator
light and displaying the vehicle detection
screen.
If the turn signal lever is operated to signal
a turn in the direction in which the BSM
warning indicator light is illuminated
while the approaching vehicle is detected,
the BSM notifies the driver of possible
danger flashing on the BSM warning
indicator light, and by activating the
warning sound and the warning screen
indicator display.
When Driving
i-ACTIVSENSE
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The detection area on this system covers
the driving lanes on both sides of the
vehicle and from the rear part of the front
doors to about 50 m (164 ft) behind the
vehicle.
1. Your vehicle
2. Detection areas
WA R N I N G
Always check the surrounding area visually
before making an actual lane change:
The system is only designed to assist you in
checking for vehicles at your rear when
making a lane change. Due to certain
limitations with the operation of this
system, the BSM warning indicator light,
the warning sound and the warning screen
indicator display may not activate or they
might be delayed even though a vehicle is
in an adjacent driving lane. Always make it
your responsibility as a driver to check the
rear.
NOTE
The BSM will operate when all of the
following conditions are met:
The ignition is switched ON.
The i-ACTIVSENSE warning
indication/warning light in the
instrument cluster is turned off.
The vehicle speed is about 10 km/h
(6.3 mph) or faster.
The BSM will not operate under the
following circumstances.
The vehicle speed falls below about
10 km/h (6.3 mph) even though the
i-ACTIVSENSE warning indication/
warning light is turned off.
The shift lever (manual transmission)/
selector lever (automatic
transmission) is shifted to reverse (R)
and the vehicle is reversing.
The turning radius is small (making a
sharp turn, turning at intersections).
In the following cases, the
i-ACTIVSENSE warning indication/
warning light turns on and operation of
the system is stopped. If the
i-ACTIVSENSE warning indication/
warning light remains illuminated, have
the vehicle inspected at an Authorized
Mazda Dealer as soon as possible.
Some problem with the system
including the BSM warning indicator
lights is detected.
A large deviation in the installation
position of a rear side radar sensor on
the vehicle has occurred.
There is a large accumulation of snow
or ice on the rear bumper near a rear
side radar sensor. Remove any snow,
ice or mud on the rear bumper.
Driving on snow-covered roads for
long periods.
The temperature near the rear side
radar sensor becomes extremely hot
due to driving for long periods on
slopes during the summer.
The battery voltage has decreased.
When Driving
i-ACTIVSENSE
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Traffic Jam Assist (TJA)*
▼Traffic Jam Assist (TJA)
The TJA is a system which consists of a
headway control fu
nction and steering
assist function for reducing driver fatigue
when driving in a traffic jam on
expressways or highways.
The system performs headway control to
maintain a constant distance between your
vehicle and a vehicle ahead at a preset
vehicle speed without you having to use
the accelerator or brake pedal. Even
further, with the steering assist function,
when vehicle lane lines are detected, the
function assists the driver in keeping the
vehicle within the lan e lines. If lane lines
are not detected, the function provides the
driver driving assistance in keeping the
vehicle along the motion path with the
vehicle ahead.
WA R N I N G
Do not rely completely on TJA:
 The TJA is not an automated driving
system. In addition, the functions have
limitations. Do not rely completely on the
system and always stay on course using
the steering wheel.
 Set a vehicle speed within the speed limit
according to the road conditions and the
weather conditions.
The TJA may not be able to detect a
vehicle ahead depending on the type of
vehicle ahead and its conditions, the
weather conditions, and the road
conditions. Additionally, the system
might be unable to decelerate sufficiently
if a vehicle ahead applies the brakes
suddenly, another vehicle cuts into the
driving lane, or the difference in vehicle
speed between your vehicle and the
vehicle ahead is larger, which could
result in an accident. Check the
surrounding conditions and always drive
carefully while keeping a safe distance
from vehicles ahead and on-coming
vehicles.
 While the TJA is in use, any intended
engine braking does not occur even if
you shift the shift lever (manual
transmission) or the selector lever
(automatic transmission). If deceleration
is required, lower the vehicle speed
setting or depress the brake pedal.

For the purposes of safety, switch the TJA
off when it is not being used.

Do not use the TJA under the following
conditions. Otherwise, it may result in an
accident.
 General roads other than expressways or
highways (Driving under these
conditions using the TJA is not possible.)
 Roads with sharp curves and where
vehicle traffic is heavy with insufficient
space between vehicles. Roads where
frequent and repetitive acceleration and
deceleration occur (Driving under these
conditions using the TJA is not possible).
When Driving
i-ACTIVSENSE
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The shade of a guardrail parallel to a
white (yellow) lane line is cast on the
road.
The width of a lane is excessively
narrow or wide.
The road is excessively uneven.
The vehicle is shaken after hitting a
road bump.
There are various road markings or
division lines (lane markings) of
various shapes near an intersection.
An object that obstructs the field of
view is installed to the vehicle.
Exhaust gas from the vehicle in front,
sand, snow, and water vapor rising
from manholes and grating, and water
splashed into the air.
The surroundings are dark such as
during the early evening or early
morning.
A vehicle ahead may be out of the
recognition area on roads with tight
curves, where the vehicle might not be
able to follow the vehicle ahead.

Headway control function
If a vehicle ahead is detected while
traveling at a constant speed, the
vehicle-ahead indication is displayed and
headway control is performed.

Steering assist function
When lane lines are detected, the function
assists the driver in keeping the vehicle
within the lane lines. If lane lines are not
detected, the function provides the driver
driving assistance in keeping the vehicle
along the motion path with the vehicle
ahead.
NOTE
Steering assist limit warning
If the steering assist function cannot keep
the vehicle within the lane lines while the
steering assist function is operating, a
warning sound is activated and a warning
is displayed on the multi-information
display to urge the driver to operate the
steering wheel.
When Driving
i-ACTIVSENSE
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▼Traffic Jam Assist (TJA) Display
Indication
The TJA setting status and operation
conditions are indicated on the
multi-information display or the active
driving display.
Multi-information display (Basic
display)
1. Vehicle ahead display
2. TJA set vehicle speed

Multi-information display
(i-ACTIVSENSE display)
1. Vehicle ahead display
2. TJA set vehicle speed

Active driving display
1. Vehicle ahead display
2. TJA set vehicle speed

Steering assist function display
When the steering assist function operates,
the steering assist operation display on the
display changes from white to green.
NOTE
You can view the multi-information display
to check whether the steering assist is
performing controls in conjunction with
the traffic lane lines or a vehicle ahead.
When Driving
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Steering assist function
The steering assist function operates under the following conditions.
Your vehicle is moving and less than about 56 km/h (35 mph).
White (yellow) lane lines on both sides are detected and you ar e driving near the center of
the lane, or your vehicle detects a vehicle ahead.
The steering wheel is not turned sharply.
The turn signal lever is not operated.
The headway control function is operating.
(Manual transmission vehicle)
The vehicle speed is about 30 km/h (19 mph) or faster.
NOTE
The steering assist function operates so that the vehicle remains near the center of the
driving lane, however, depending on conditions such as the road curvature, road slope and
undulations, and vehicle speed, th e function might not be able to keep the vehicle near the
center of the driving lane.
Setting method
1. CANCEL switch
2. RES switch
3. TJA switch

1. Press the TJA switch. The TJA standby indication (white) turns on. In addition, the T JA display indication is
displayed on the mu lti-information display at the same time.
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2. Adjust the vehicle speed to the desired setting using the accelerator pedal and press theRES switch up (SET+) or down (SET-) to start headway control.
The set speed is indicated on the display. At the same time, th e TJA standby indication
(white) changes to the TJA set indication (green).
3. The headway control is operable when all of the conditions fo r it to operate are met, or
the steering assist function is o perable when all of the conditions for it to operate are
met.
NOTE
If a vehicle ahead is detected while traveling at a constant speed, the vehicle-ahead
indication is displayed and headway control is performed. Additionally, when a vehicle
ahead is no longer detected, the vehicle-ahead indication turns off and the system
switches back to travel at constant speed.
The lowest possible speed which can be set on the TJA is 30 km/h (19 mph).
Headway control is not possible if the vehicle ahead is driving faster than your vehicle's
set speed. Adjust the system to the desired vehicle speed using the accelerator pedal.
When the ignition is switched OFF, the system status before it was turned off is
maintained. For example, if the ignition is switched OFF with the TJA operable, the TJA
remains operational the next time the ignition is switched ON.
When the TJA switch is pressed until the syst em switches to the cruise standby indication
(white) while the TJA is opera ting, the system switches to the cruise control function.
When the TJA is operating, the Lane-keep Assist System (LAS), Distance & Speed Alert
(DSA), and Smart Brake Support (SBS) also turns on automatically.
When the TJA switch is pressed while the Mazda Radar Cruise Control (MRCC) or the
Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function)
system is operating, the TJA operates. In addition, when the MRCC switch is pressed
while the TJA is operating, the Mazda Radar Cruise Control (MRCC) or the Mazda
Radar Cruise Control with Stop & Go functi on (MRCC with Stop & Go function) system
operates.

Changing the set vehicle speed
(To accelerate/decelerate using the RES switch)
When the RES switch is pressed up (SET+), the vehicle accelerat es and when the RES
switch is pressed down (SET-), it decelerates.
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In the following cases, the TJA cancel indication is displayed and a sound is activated one
time.
The DSC has operated.
The Smart Brake Support (SBS) has operated.
The vehicle is driven on a downslope for a long time.
There is a problem with the system.
The front radar sensor cannot detect target objects (during rai n, fog, snow or other
inclement weather conditions, or when the radiator grille is dirty).
The parking brake is applied.
Any of the doors is opened.
The driver's seat belt is unfastened.
(Automatic transmission vehicle)
The parking brake is automatical ly applied during stop hold control.
(Manual transmission vehicle)
The vehicle speed decreases below 25 km/h (15 mph).
The shift lever is in the neutral position for a certain period of time.
The clutch pedal is depressed for a certain period of time.
The engine has stalled.

Steering assist function
If any of the fo llowing conditions occurs, the steering assist function is temporarily
canceled.
White (yellow) lane lines cannot be detected or a vehicle ahead cannot be recognized.
CANCEL switch is pressed.
Your vehicle speed is more than about 64 km/h (40 mph).
The brake pedal is depressed.
The accelerator pedal is operated.
The turn signal lever is operated.
The vehicle is making a sharp curve.
The width of a lane is excessively narrow or wide.
The vehicle crosses a lane line.
(Automatic transmission vehicle)
The selector lever is in the P, N, or R position.
(Manual transmission vehicle)
The shift lever is in the R position.

In the following cases, the TJA cancel indication is displayed and a sound is activated one
time.
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Active driving display
If the steering wheel is held lightly, or depending on the road conditions, the system
determines that you have released the steering wheel (not holding the steering wheel) even if
you are holding it, and an alert is indicated on the multi-information display and the active
driving display.

To resume operation
If the TJA is temporarily cancel ed, it will resume operation at the previously set speed by
pressing the RES switch after a ll of the operation conditions have been met.
NOTE
If the set speed is not indicated on the displa y, the system does not operate even if the RES
switch is pressed.
After the operation, the steering assist ope ration may not operate for a period of 5
seconds at the most until the lane lines are detected or a vehicle ahead is recognized.

Turning off
When the TJA switch is pressed w hile the TJA is operating, the TJA turns off.
▼Shift-up/Shift-down Request Display
(Manual Transmission)
The shift-up or shift-down request display
might be displayed while the TJA is
operating. When this occurs, shift gears
because the gear position is not
appropriate.
Request Indication on display
Shift up Shift Up to a Higher Gear
Shift down Shift Do wn to a Lower Gear
NOTE
If the gears are not shifted up even
though the shift-up request indication is
displayed, load will be applied to the
engine and the TJA might be
automatically canceled or engine
damage could occur.
If the gears are not shifted down even
though the shift-down request indication
is displayed, the TJA might be
automatically canceled or engine
stalling could occur.
When Driving
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Lane-keep Assist System(LAS)
*
▼Lane-keep Assist System (LAS)
The LAS provides steering assistance to
help the driver stay within the vehicle lane
if the vehicle might be deviating.
The forward sensing camera (FSC) detects
the white lines (ye
llow lines) of the
vehicle lane in which the vehicle is
traveling and if the system determines that
the vehicle may deviate from its lane, it
operates the electri c power steering to
assist the driver’s steering operation. The
system also alerts the driver by displaying
an alert on the mult i-information display
or the active driving display
*. Use the
system when you drive the vehicle on
roads with white (ye llow) lines such as
expressways and highways.
1. Forward sensing camera (FSC)
WA R N I N G
Do not rely completely on the LAS:
 The LAS is not an automated driving
system. In addition, the system is not
designed to compensate for a driver’s
lack of caution, and over-reliance on the
system could lead to an accident.
The functions of the LAS have limitations.
Always stay on course using the steering
wheel and drive with care.
 Do not use the LAS under the following
circumstances, otherwise it may result in
an accident.
 The vehicle is driven on slippery roads
such as icy or snow-covered roads, and
unpaved roads.
 Tires of a different specified size are
used, such as a temporary spare tire.
 Tires with insufficient tread are used.
 The tire pressures are not adjusted to
the specified pressure.
 The vehicle is being used to tow a
camper or boat trailer.
 Tire chains are used.
 The vehicle is driven on roads with lane
lines other than white (yellow) lines,
such as an expressway.
CAUTION
Heed the following cautions so that the LAS
can operate normally.
Do not modify the vehicle's suspensions.
 Always use wheels of the
specified type
and size for the front and rear wheels.
Consult an Authorized Mazda Dealer for
tire replacement.
NOTE
The system may not operate normally
under the following conditions.
The white (yellow) lane lines are less
visible because of dirt or paint flaking.
White (yellow) lane lines are less visible
because of bad weather (rain, fog, or
snow).
When Driving
i-ACTIVSENSE
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