Mazda CX-3: i-ACTIVSENSE / Blind Spot Monitoring (BSM)(Some models)

Mazda CX-3 (2015-2022) Owner's Manual / When Driving / i-ACTIVSENSE / Blind Spot Monitoring (BSM)(Some models)

The BSM is designed to assist the driver in checking the area to the rear of the vehicle on both sides during lane changes by notifying the driver of the presence of vehicles approaching from the rear in an adjacent lane.

The BSM detects vehicles approaching from the rear while traveling in the forward direction at a speed of 10 km/h (6.3 mph) or faster and notifies the driver by turning on the BSM warning indicator light and displaying the vehicle detection screen (vehicles with active driving display).

If the turn signal lever is operated to signal a turn in the direction in which the BSM warning indicator light is illuminated while the approaching vehicle is detected, the BSM notifies the driver of possible danger by turning on the BSM warning indicator light, and by activating the warning sound and the warning screen indicator display (vehicles with active driving display).

The detection area on this system covers the driving lanes on both sides of the vehicle and from the rear part of the front doors to about 50 m (164 ft) behind the vehicle.

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

WARNING

Always check the surrounding area visually before making an actual lane change: The system is only designed to assist you in checking for vehicles at your rear when making a lane change. Due to certain limitations with the operation of this system, the BSM warning indicator light, the warning sound and the warning screen indicator display may not activate or they might be delayed even though a vehicle is in an adjacent driving lane. Always make it your responsibility as a driver to check the rear.

NOTE

  • The BSM will operate when all of the following conditions are met:
    • The ignition is switched ON.
    • The BSM OFF indicator light in the instrument cluster is turned off.
    • The vehicle speed is about 10 km/h (6.3 mph) or faster.
  • The BSM will not operate under the following circumstances.
    • The vehicle speed falls below about 10 km/h (6.3 mph) even though the BSM OFF switch indicator light is turned off.
    • The shift lever (manual transaxle)/selector lever (automatic transaxle) is shifted to R position and the vehicle is reversing.
    • The turning radius is small (making a sharp turn, turning at intersections).
  • In the following cases, the BSM OFF indicator light turns on and operation of the system is stopped. If the BSM OFF indicator light remains illuminated, have the vehicle inspected at an Authorized Mazda Dealer 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 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). Remove any snow, ice or mud on the rear bumper.
    • Driving on snow-covered roads for long periods.
    • The temperature near the radar sensors (rear) 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.
    • 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 traveling 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 radar sensors (rear) is set at the road width of expressways.
  • In the following case, the flashing of the BSM warning indicator light, and the activation of the warning sound and the warning screen indicator display may not occur or they may be delayed.
    • A vehicle makes a lane change from a driving lane two lanes over to an adjacent lane.
    • Driving on steep slopes.
    • Crossing the summit of a hill or mountain pass.
    • When there is a difference in the height between your driving lane and the adjacent lane.
    • Directly after the BSM system becomes operable by changing the setting.
  • If the road width is extremely narrow, vehicles two lanes over may be detected. The detection area of the radar sensors (rear) is set according to the road width of expressways.
  • The BSM warning indicator light may turn on and the vehicle detection screen may be displayed in the display in reaction to stationary objects (guardrails, tunnels, sidewalls, and parked vehicles) on the road or the roadside.

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

  • A BSM warning indicator light may flash or the warning beep and the warning screen indicator display may be activated several times when making a turn at a city intersection.
  • Turn off the BSM while pulling a trailer or while an accessory such as a bicycle carrier is installed to the rear of the vehicle. Otherwise, the radar’s radio waves will be blocked causing the system to not operate normally.
  • In the following cases, it may be difficult to view the illumination/flashing of the BSM warning indicator lights equipped on the door mirrors.
    • Snow or ice is adhering to the door mirrors.
    • The front door glass is fogged or covered in snow, frost or dirt.
  • The radar sensors (rear) of the BSM may be regulated under the radio wave related laws of the country where the vehicle is driven. The sensors in this system are approved for use in the U.S.A. (including territories), Canada, and Mexico. If a vehicle with a BSM is driven in a country other than the U.S.A., Canada, or Mexico, the system has to be turned off using the BSM OFF switch.
  • The system switches to the Rear Cross Traffic Alert function when the shift lever (manual transaxle) or the selector lever (automatic transaxle) is shifted to the reverse (R) position. Refer to Rear Cross Traffic Alert (RCTA).

Blind Spot Monitoring (BSM) Warning Indicator Lights/Blind Spot Monitoring (BSM) Warning Beep

The BSM or Rear Cross Traffic Alert (RCTA) system notifies the driver of the presence of vehicles in adjacent lanes or at the rear of the vehicle using the BSM warning indicator light, the warning sound and the display indicator (vehicles with active driving display) (BSM) while the systems are operational.

BSM warning indicator lights

The BSM warning indicator lights are equipped on the left and right door mirrors. The warning indicator lights turn on when a vehicle approaching from the rear in an adjacent lane is detected.

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

When the ignition is switched ON, the warning indicator light turns on momentarily and then turns off after a few seconds.

Forward driving (BSM operation)

The BSM detects vehicles approaching from the rear and turns on the BSM warning indicator lights equipped on the door mirrors according to the conditions. Additionally, while a BSM warning indicator light is illuminated, if the turn signal lever is operated to signal a turn in the direction in which the BSM warning indicator light is illuminated, the BSM warning indicator light flashes.

Reverse driving (Rear Cross Traffic Alert (RCTA) system operation)

The Rear Cross Traffic Alert (RCTA) system detects vehicles approaching from the left and right of your vehicle and flashes the BSM warning indicator lights.

Function for cancelling illumination dimmer

If the BSM warning indicator lights turn on when the parking lights are turned on, the brightness of the BSM warning indicator lights is dimmed. If the BSM warning indicator lights are difficult to see due to glare from surrounding brightness when traveling on snow-covered roads or under foggy conditions, press the dimmer cancellation button to cancel the dimmer and increase the brightness of BSM warning indicator lights when they turn on.

Refer to Dashboard Illumination.

Display indicator (Vehicles with active driving display) The detected approaching vehicle and warning are displayed in the active driving display when the vehicle is moving forward (BSM operational).

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

The detected direction is displayed with a detection indicator (white) when an approaching vehicle is detected. In addition, if the turn signal lever is operated to signal a lane change while the vehicle is detected, the display changes the color (amber) of the warning indicator.

BSM warning beep

The BSM warning beep is activated simultaneously with the flashing of a BSM warning indicator light.

Canceling Operation of Blind Spot Monitoring (BSM)

The BSM and Rear Cross Traffic Alert (RCTA) systems are turned off and the BSM OFF indicator light in the instrument cluster turns on.

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

Vehicles with BSM OFF switch

When the BSM OFF switch is pressed, the BSM and Rear Cross Traffic Alert (RCTA) systems are turned off and the

BSM OFF indicator light in the instrument cluster turns on.

Mazda CX-3. Blind Spot Monitoring (BSM)(Some models)

If the switch is pressed again, the BSM and Rear Cross Traffic Alert (RCTA) systems become operable and the BSM OFF indicator light turns off.

NOTE

When the ignition is switched OFF, the system status before it was turned off is maintained. For example, if the ignition is switched OFF while the BSM and Rear Cross Traffic Alert (RCTA) systems are operable, the BSM and Rear Cross Traffic Alert (RCTA) systems remain operable the next time the ignition is switched ON.

Vehicles without BSM OFF switch

The BSM system can be set to inoperable. Refer to Personalization Features.

When the BSM is set to inoperable, the BSM and Rear Cross Traffic Alert (RCTA) systems are turned off and the BSM OFF indicator light in the instrument cluster turns on.

NOTE

When the ignition is switched OFF, the system status before it was turned off is maintained. For example, if the ignition is switched OFF while the BSM and Rear Cross Traffic Alert (RCTA) systems are operational, the BSM and Rear Cross Traffic Alert (RCTA) systems remain operational the next time the ignition is switched ON.

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