Mazda 3 2020 Owner's Manual page 273

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 30

km/h (19 mph) or faster.
The BSM will not operate under the

following circumstances.
The vehicle speed falls below

about 25 km/h (15 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
expert repairer (we recommend an
Authorised Mazda Repairer) 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.

Under the following conditions, the

rear side radar sensor cannot detect
target objects or it may be difficult to
detect them.
The rear bumper around the rear

side radar sensor is deformed.
Radio wave interference from a

radar sensor equipped on a nearby
vehicle.
The approaching vehicle is any of

the following shapes.
a) The size of the vehicle body is
extremely small.
b) The vehicle height is extremely
low or high.
c) A special type of vehicle with a
complex shape.
A vehicle is in the detection area at

the rear in an adjacent driving lane
but it does not approach. The BSM
determines the condition based on
radar detection data.
A vehicle is travelling alongside

your vehicle at nearly the same
speed for an extended period of
time.
Vehicles approaching in the

opposite direction.
A vehicle in an adjacent driving

lane is attempting to pass your
vehicle.
A vehicle is in an adjacent lane on

a road with extremely wide driving
lanes. The detection area of the
rear side radar sensor is set at the
road width of expressways.
When Driving
i-ACTIVSENSE
4-115