Mazda CX-3 Owner's Manual page 324

Some problem with the system including the Blind Spot Monitoring (BSM) warning
indicator lights has occurred.
A large deviation in the installation position of a radar sensor (rear) on the vehicle has
occurred.
There is a large accumulation of snow or ice on the rear bumper near a radar sensor
(rear).
Driving on snow-covered roads for long periods.
The temperature near the radar sensors becomes extremely hot due to driving for long
periods on slopes during the summer.
The battery voltage has decreased.
Under the following conditions, the radar sensors (rear) cannot detect target objects or it
may be difficult to detect them.
The vehicle speed when reversing is about 10 km/h (6.3 mph) or faster.
The radar sensor (rear) detection area is obstructed by a nearby wall or parked vehicle.
(Reverse the vehicle to a position where the radar sensor detection area is no longer
obstructed.)
A vehicle is approaching directly from the rear of your vehicle.
The vehicle is parked at an angle.
(With Blind Spot Monitoring (BSM) OFF switch)
Directly after pressing the Blind Spot Monitoring (BSM) OFF switch and the system
becomes operable.
CX-3_8GT4-EE-18D_Edition8_old
When Driving
i-ACTIVSENSE
Your vehicle
Your vehicle
Your vehicle
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