display MAZDA MODEL 3 HATCHBACK 2020 (in English) Manual Online

Steering assist function
The steering assist function operates when all of the following conditions are met.
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 the
RES 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.
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 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.
Press and release immediately: 1 km/h (1 mph)
Press and hold: 10 km/h (5 mph)
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(To increase speed using accelerator pedal)
Depress the accelerator pedal and press the RES switch up (SET+ ) or down (SET-) at the
desired speed. If the switch is not operated, the system return s to the set speed after you
release your foot from the accelerator pedal.
NOTE
The warnings and brake control do not operate while depressing the accelerator pedal.
The lowest possible speed which can be set on the TJA is 30 km/h (19 mph).
(Automatic transmission vehicle)
The vehicle speed setting can be changed by operating the RES switch during stop hold
control.

Changing the distance between ve hicles during headway control
The distance-between-vehicles can be set to 4 levels; Long, medium, short, and extremely
short distance.
The distance-between-vehicles is set to a shorter distance by p ressing the CANCEL switch
down. The distance-between-vehicles is set to a longer distance by pressing the CANCEL
switch up.
Distance-between-vehicles guide‐ line
(at 80 km/h (50 mph) vehicle speed) Indication on display
Indication on multi-information display Indication on active driving dis‐
play
*1
Long (about 50 m (164 ft))
Medium (about 40 m (131 ft))
Short (about 30 m (98 ft))
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Distance-between-vehicles guide‐line
(at 80 km/h (50 mph) vehicle speed) Indication on display
Indication on multi-information display Indication on active driving dis‐
play
*1
Extremely short (about 25 m (82 ft))
*1 Displays a pop-up image when the CANCEL switch is operated.
NOTE
The distance-between-vehicles differs depending on the vehicle speed, and the slower the
vehicle speed, the shorter the distance.
When the ignition is switched to ACC or OFF, the set distance-between-vehicles is taken
over automatically even when the engine is started again.

The function is temporarily canceled.
Headway control function
When the following operations are performed, the headway contro l function is temporarily
canceled and the TJA set indication (green) changes to the TJA standby indication (white) at
the same time.
The CANCEL switch is pressed one time.
The brake pedal is depressed.
(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.

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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.
The operation frequency of the braking by the TJA control is hi gh.
(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.
The headway control function is canceled.
White (yellow) lane lines cannot be detected or a vehicle ahead cannot be recognized.
Your vehicle speed is more than about 64 km/h (40 mph).
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.
The driver takes his/her hands off the steering wheel.
The steering wheel is operated abruptly.
There is a problem with the system.
The temperature in the Forward Sensing Camera (FSC) is high or low.
The windshield around the Forward Sensing Camera (FSC) is foggy .
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The windshield around the Forward Sensing Camera (FSC) is blocked by an obstruction,
causing poor forward visibility.

NOTE
If you take your hands off the steering wheel (not holding the steering wheel), the warning
sound is activated and an alert is indicated on the multi-information display and the active
driving display.
Multi-information display
Active driving display
If the steering wheel is held lightly, or depending on the road conditions, the system
determines that you have released the steeri ng 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 cancele d, it will resume operation at the previously set speed by
pressing the RES switch after all of the operation conditions h ave been met.
NOTE
If the set speed is not indicated on the display, the system does not operate even if the RES
switch is pressed.
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After the operation, the steering assist operation 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.
▼Stop Hold Control (Automatic
Transmission)
While in headway control using the TJA,
your vehicle will stop when a vehicle
ahead stops. When the vehicle is stopped
and the stop hold control operates, the TJA
indicator light turns on.
NOTE
Even if the TJA is temporarily canceled
during stop hold control, the vehicle is
held in its stopped position.
The parking brake is automatically
applied and the vehicle is held in its
stopped position when 10 minutes or
longer have passed since the stop hold
control operated. When this occurs, the
TJA is temporarily canceled.
The brake lights turn on during stop
hold control.

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To resume driving
After the vehicle ahead starts moving
while your vehicle is stopped under stop
hold control, press the RE S switch or
depress the accelerator pedal to cancel the
stop hold control and start driving.
NOTE
When you resume driving by pressing
the RES switch, your vehicle does not
start moving until the distance between
your vehicle and the vehicle ahead
lengthens to the specified distance or
farther.
If the TJA is temporarily canceled,
depress the accelerator pedal and start
driving the vehicle. If the TJA is
temporarily canceled, you cannot
resume driving by pressing the RES
switch when there are no vehicles in
front of your vehicle.
If the vehicle ahead starts moving within
3 seconds after your vehicle is stopped
by the stop hold control, headway
control will continue even if you do not
resume driving your vehicle, such as by
depressing the accelerator pedal.

Vehicle departur e information
If you do not resume driving within a few
seconds after the vehicle ahead starts
moving during stop hold control, the
multi-information display vehicle-ahead
indication flashes to urge the driver to
resume driving. If you do not resume
driving after the indicator light flashes, a
sound is activated to urge you to resume
driving.
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 electric power steering to
assist the driver’s steering operation. The
system also alerts the driver by displaying
an alert on the multi-information display
and the active driving display
*. Use the
system when you drive the vehicle on
roads with white (yellow) 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.
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Strong light is directed from the front of
the vehicle (such as sunlight, or
headlights (high-beam) of on-coming
vehicles).
▼ System Operation
When the ignition is switched ON, the
i-ACTIVSENSE status symbol (warning/
risk avoidance support system) (white)
turns on and the system goes on standby.
NOTE
If the i-ACTIVSENSE status symbol
(warning/risk avoidance support system)
(white) does not turn on, the system is
canceled using the i-ACTIVSENSE switch
or the personalization feature.
Operation conditions
When all of the following conditions are
met, the i-ACTIVSENSE status symbol
(warning/risk avoidance support system)
on the multi-in
formation display changes
from white to green and the system
becomes operational.
The vehicle speed is about 64 km/h (40
mph) or faster.
The system detects white (yellow) lane
lines.
NOTE
When the system does not detect a white
(yellow) lane line on one side only, the
system does not operate on the side that is
not being detected.
When temporarily canceling the system
The LAS goes on standby in the following
cases: The LAS opera tion is automatically
restored when the system's operation
conditions are met.
The system cannot detect white (yellow)
lane lines.
The vehicle speed is less than about 56
km/h (35 mph).
The turn signal lever is operated.
The accelerator pedal is depressed
abruptly.
The TCS/DSC is operating.
The DSC is turned off.
The steering wheel is operated.
The brake pedal is operated.
The function is temporarily stopped.
The LAS stops functioning in the
following cases:
The temperature in the forward sensing
camera (FSC) is high or low.
The windshield around the forward
sensing camera (FSC) is foggy.
The windshield around the forward
sensing camera (FSC) is blocked by an
obstruction, causing poor forward
visibility.
Strong light (such as sunlight, or
headlights (high-beam) of on-coming
vehicles) is directed at the forward
sensing camera (FSC).
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System malfunction
If there is a problem with the system, the
i-ACTIVSENSE status symbol (warning/
risk avoidance support system) (white)
and the i-ACTIVSENSE warning
indication/warning light on the
multi-information display turns on and a
message is indicated.
Refer to i-ACTIVSENSE Status Symbol
(Warning/Risk Avoidance Support
System) on page 4-85.
▼ Steering Wheel Ope
ration Assist
When the system determines that the
vehicle might be deviating from its lane,
the steering wheel operation assist
operates.
The system notifies the driver of the
direction in which the system provided
steering wheel operation assistance on the
multi-information di splay and the active
driving display
*.
Multi-information display
Active driving display*
NOTE
When the driver operates the steering
wheel while the steering wheel operation
assist is operating, the steering wheel
operation assistance is canceled.
▼ System Canceling
The LAS can be set to inoperable.
(If only the LAS
is turned off)
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(If the LAS is turne d off by operating
the i-ACTIVSENSE switch)
Refer to i-ACTIVSENSE Switch on
page 4-87.
NOTE
If the ignition is sw itched OFF while you
have canceled the system using the
i-ACTIVSENSE switch, the system is
automatically enabled the next time the
ignition is switched ON. However, if the
system is canceled using the
personalization features, the system is not
automatically enabled.
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