Mazda CX-3 Owner's Manual page 659

NOTE
Placing heavy items on the front
   
passenger seat may cause the front
passenger seat belt warning function
to operate depending on the weight
of the item.
To allow the front passenger seat
   
weight sensor to function properly,
do not place and sit on an additional
seat cushion on the front passenger
seat. The sensor may not function
properly because the additional
seat cushion could cause sensor
interference.
When a small child sits on the front
   
passenger seat, it is possible that the
warning beep will not operate.
Rear seat
*
The warning beep only sounds if a seat
belt is unfastened after being fastened.
Warning/Indicator Lights and Warning Sounds
Ignition Not Switched Off (STOP)
Warning Beep
European models
If the driver's door is opened with the
ignition switched to ACC, a beep will
be heard 6 times in the cabin to notify
the driver that the ignition has not been
switched OFF (STOP). Under this
condition, the keyless entry system will
not operate, the vehicle cannot be locked,
and the battery voltage will be depleted.
Except European models
If the driver's door is opened with the
ignition switched to ACC, a beep will
be heard continuously in the cabin to
notify the driver that the ignition has not
been switched OFF (STOP). Under this
condition, the keyless entry system will
not operate, the vehicle cannot be locked,
and the battery voltage will be depleted.
If Trouble Arises
7–65
*Some models.