Mazda 3 Owner's Manual page 293

NOTE
The rear vehicle monitoring system operates when all of the following conditions are
satisfi ed:
The ignition is switched ON.
The RVM switch is pressed and the RVM indicator light (green) in the instrument
cluster is illuminated.
The vehicle speed is about 30 km/h (19 mph) or higher.
The rear vehicle monitoring system does not operate under the following conditions:
The vehicle speed falls below 30 km/h (19 mph) even though the RVM indicator
light (green) is illuminated.
The shift lever is shifted into reverse (R) and the vehicle moves in reverse.
In the following cases, the system illuminates the RVM warning light (amber) in the
instrument cluster and stops the operation of the system. If the RVM warning light
(amber) continues to illuminate, have the system inspected at an Authorised Mazda
Dealer as soon as possible:
A malfunction in the system, including the RVM warning indicator light, is detected.
The position of a radar sensor has changed signifi cantly. The direction in which the
radar sensors are pointed is factory-adjusted specifi c to the installation conditions for
each vehicle so that they detect approaching vehicles correctly. If the direction of a
radar sensor has deviated for some reason, it needs to be readjusted.
Large quantities of snow or ice are on the rear bumper near the radar sensors.
Driving on snow-covered roads for long periods.
The temperature surrounding the radar sensors becomes extremely high when the
vehicle is driven up-hill for long periods under hot summer weather conditions.
The battery voltage is low.
There is a limit to the detection capability of the radar sensors. In the following cases,
the rear vehicle monitoring system's detection capability may weaken and not operate
normally:
The rear bumper near a radar sensor is deformed.
Snow, ice or mud adheres to the area near a radar sensor on the rear bumper.
Under certain weather conditions including rain, snow, or fog.
Rear Vehicle Monitoring (RVM) System
When Driving
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