Mazda 3 Sedan 2020 Owner's Manual page 296

When Driving
i-ACTIVSENSE
If a vehicle ahead is traveling at an

extremely low speed, the system may
not detect it correctly.
If there is a structure on the road or

an object (such as a monorail) at a
low height off the ground in front of
the vehicle, the system may operate.
Therefore, do not use the TJA.
Do not use the TJA under conditions

in which close proximity warnings
are frequently activated.
If it is necessary to accelerate for a

lane change or the vehicle ahead
brakes suddenly causing you to close
in on the vehicle rapidly, accelerate
using the accelerator pedal or
decelerate using the brake pedal
depending on the conditions.
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.
While braking by the TJA control is

operating, you might hear an
operation sound, however, this does
not indicate a problem.
The brake lights turn on while

braking by the TJA control is
operating, however, they may not
turn on while the vehicle is on a
down slope at the set vehicle speed
or traveling at a constant speed and
following a vehicle ahead.
Under the following conditions, the

TJA may not be able to detect white
(yellow) lines or vehicles ahead
correctly and the TJA may not
operate normally.
The forward sensing camera (FSC)

cannot recognize the area in front
of the vehicle due to soiling or fog.
4-142
The white (yellow) lane lines are

less visible because of dirt or paint
flaking.
White (yellow) lane lines or

vehicles ahead are less visible
because of bad weather (rain, fog,
or snow).
The vehicle is driven on a

temporary lane or section with a
closed lane resulting from
construction where there might be
multiple white (yellow) lane lines,
or they are interrupted.
The camera picks up an obscure

line, such as a temporary line being
used for construction, or because
of shade, unmelted snow, or
grooves filled with water.
The road surface is wet and shiny

after rain, or there are puddles on
the road.
Heavy luggage is loaded in the

trunk/luggage compartment or on
the rear seat causing the vehicle to
tilt.
A vehicle in front of your vehicle is

running near a white (yellow) lane
line making it less visible.
The windshield is dirty or foggy.

The vehicle is driven through an

intersection, a junction, or a fork in
the road.
While white (yellow) lane lines

cannot be detected due to road or
weather conditions.
The surrounding brightness

suddenly changes such as when
entering or exiting a tunnel.
The illumination of the headlights

is weakened because of dirt or the
optical axis is deviated at night.
Back-light is reflected off the road

surface or the road surface is wet
and shiny after rain.