Reverse drive detection (Some Models)

When you are driving in reverse, the following functions of the Smart Brake Support (SBS) operate.

  • Rearward detection function

  • Rear crossing

 

Do not rely completely on the SBS:

The SBS is only designed to reduce damage in the event of a collision. Over reliance on the system leading to the accelerator pedal or brake pedal being mistakenly operated could result in an accident.

Heed the following cautions so that the SBS can operate normally:

  • Do not apply stickers (including transparent stickers) to the areas around the rear side radar sensors and the rear ultrasonic sensors. Otherwise, a rear side radar sensor and a rear ultrasonic sensor may not be able to detect vehicles and obstructions correctly which could result in an accident.

  • Do not disassemble the rear side radar sensors and rear ultrasonic sensors.

  • If you recognize scratches around the rear side radar sensors and rear ultrasonic sensors, stop using the SBS immediately and always have the vehicle inspected by an Authorized Mazda Dealer.

    Refer to Stopping the Smart Brake Support (SBS) System Operation (Search).

  • Consult an Authorized Mazda Dealer for rear bumper removal/installation.

Do not modify the suspension:

If the vehicle height or inclination is changed, the SBS may not operate correctly because it cannot detect obstructions correctly.

Do not hit the rear side radar sensors and rear ultrasonic sensors forcefully:

When washing the vehicle, do not spray highly pressurized water against the rear side radar sensors and the rear ultrasonic sensors, or rub them strongly. In addition, do not hit the rear bumper forcefully when loading and unloading cargo. Otherwise, the system will be unable to detect obstructions correctly and the SBS may not operate normally.

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  • In the following cases, turn the SBS off to prevent a mis-operation.

    • A trailer is pulled or an accessory such as a bicycle carrier is installed to the rear of the vehicle.

    • The vehicle is driven on rough roads such as in areas where there is grass and foliage or off-road.

      Refer to Stopping the Smart Brake Support (SBS) System Operation (Search).

  • Always use tires for all wheels that are of the specified size, and the same manufacture, brand, and tread pattern. In addition, do not use tires with significantly different wear patterns on the same vehicle. If such improper tires are used, the SBS may not operate normally.

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Rearward detection function

The rearward detection function is designed to reduce damage in the event of a collision with a target object when reversing.

The rearward detection function detects obstructions using the rear ultrasonic sensors. In addition, if there is the possibility of your vehicle colliding with a target object at the rear while you are driving in reverse, you are notified of possible danger by a warning sound and a warning indication on the display.

Furthermore, if the possibility of a collision increases, brake control is performed to reduce damage in the event of a collision.

 

Always check the surrounding area visually when reversing the vehicle:

The operation of the rearward detection function has certain limitations. Therefore, the function might not operate or it might be delayed even if there is a target object at the rear of your vehicle. Always make it your responsibility as a driver to check the rear.

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Operation conditions

The rearward detection function operates when all of the following conditions are met.

  • The engine is running.

  • The SBS is on.

  • The selector lever is in the R position.

  • The vehicle speed is about 2 km/h (2 mph) to 8 km/h (4 mph).

  • There is no problem with the DSC.

  • The Electric Parking Brake (EPB) is not operating.

 

  • When any of the following conditions is met, the rearward detection function may not operate.

    • Directly after the engine starts.

    • The height of the obstruction is low such as low walls or trucks with low loading platforms.

    • The height of the obstruction is high such as trucks with high loading platforms.

    • The obstruction is not as large as a vehicle or wall.

    • The obstruction is thin such as a signpost.

    • The surface of the obstruction is not pointed vertically relative to your vehicle.

    • The obstruction is soft such as a hanging curtain or snow stuck to a vehicle.

    • The obstruction is shaped irregularly.

    • The obstruction is extremely close.

  • When any of the following conditions is met, the rearward detection function may not operate normally.

    • Snow, ice, or mud adheres to the area around a rear ultrasonic sensor.

    • The vehicle posture is unstable due to sudden operation of the steering wheel, accelerator pedal, or brake pedal.

    • There is another obstruction near one obstruction.

    • During inclement weather such as rain, fog, and snow.

    • High or low humidity.

    • High or low temperatures.

    • Strong winds.

    • The path of travel is not flat.

    • Heavy luggage is loaded in the luggage compartment or on the rear seat and the vehicle is tilted.

    • Objects such as a wireless antenna, fog light, or illuminated license plate is installed near a rear ultrasonic sensor.

    • The orientation of a rear ultrasonic sensor has deviated for reasons such as a collision.

    • The vehicle is affected by other sound waves such as the horn, engine noise, or rear ultrasonic sensor of another vehicle.

  • When any of the following conditions is met, the rearward detection function may operate.

    • Reversing towards a steep ascending slope.

    • There are grating, wheel blocks, a road curb, or a bump.

    • There is a hanging curtain or railroad crossing gate.

    • Reversing near objects such as foliage, barriers, vehicles, walls, or fences.

    • The vehicle is driven on rough roads such as in areas where there is grass and foliage or off-road.

    • When reversing through low gates, narrow gates, car washing machines, tunnels, or into a mechanical parking garage.

    • A towing bar is installed or a trailer is connected.

  • If the system performs brake control and the vehicle is stopped, the system will continue to hold the brakes for a brief time unless there is an operation performed by the driver.

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Collision warning

If there is the possibility of your vehicle colliding with a vehicle approaching from the rear on the left or right, or from the rear while you are driving in reverse, a warning sound is activated continuously and a warning is displayed on the multi-information display and the active driving display.

Multi-information display

  1. “BRAKE!” message is displayed

 

Active driving display

  1. “BRAKE!” message is displayed

 

During brake control, the collision warning sound is activated intermittently.

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Rear crossing

The Rear Crossing detection function is designed to reduce the damage in the event of a collision with a vehicle approaching from the rear sides while driving in reverse.

The Rear Crossing detection function detects approaching vehicles using the rear side radar sensors. If there is the possibility of your vehicle colliding with a vehicle approaching from the rear sides while you are driving in reverse, you are notified of possible danger by a warning sound and a warning indication on the display.

Furthermore, if the possibility of a collision increases, brake control is performed to reduce damage in the event of a collision.

 

Always check the surrounding area visually when reversing the vehicle:

The operation of the Rear Crossing detection function has certain limitations. Therefore, the function might not operate or it might be delayed even if there is a vehicle passing through the rear of your vehicle. Always make it your responsibility as a driver to check the rear.

Do not rely completely on the Rear Crossing detection function:

The Rear Crossing detection function operates on vehicles while you are driving in reverse. It will not operate on walls, pedestrians, or animals.

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Operation conditions

The Rear Crossing detection function operates when all of the following conditions are met.

  • The engine is running.

  • The SBS is on.

  • The selector lever is in the R position.

  • The vehicle speed is about 10 km/h (6.2 mph) or slower.

  • There is no problem with the DSC.

 

  • When any of the following conditions is met, the i-ACTIVSENSE warning indication/warning light is turned on and the system operation is stopped. If the i-ACTIVSENSE warning indication/warning light remains on, have the vehicle inspected by an Authorized Mazda Dealer as soon as possible.

    • There is a problem with the system.

    • A large deviation in the installation position of a rear side radar sensor on the vehicle has occurred.

    • Snow, ice, or mud is adhering around a rear side radar sensor.

    • The temperature around a rear side radar sensor is high.

    • Driving on snow-covered roads for long periods.

    • The battery voltage has decreased.

  • When any of the following conditions is met, the Rear Crossing detection function will not detect approaching vehicles or they may be difficult to detect.

    • The rear side radar sensor 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.)

      1. Your vehicle

         

    • A vehicle is approaching directly from the rear of your vehicle.

      1. Your vehicle

         

    • The vehicle is parked on a slant.

      1. Your vehicle

         

    • A vehicle is approaching from the opposite direction on a steep gradient.

      1. Your vehicle

         

    • Directly after the engine starts.

    • Just after the SBS operation has been enabled using [Settings] in Mazda Connect.

    • Radio wave interference from a radar sensor equipped on a vehicle parked nearby.

  • When any of the following conditions is met, the Rear Crossing may operate.

    • There is a hanging curtain or railroad crossing gate.

    • Reversing near objects such as foliage, barriers, vehicles, walls, or fences.

    • The vehicle is driven on rough roads such as in areas where there is grass and foliage or off-road.

    • When reversing through low gates, narrow gates, car washing machines, or tunnels.

    • A towing bar is installed or a trailer is connected.

  • If the system performs brake control and the vehicle is stopped, the system will continue to hold the brakes for a brief time unless there is an operation performed by the driver.

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Collision warning

If there is the possibility of your vehicle colliding with a vehicle approaching from the rear on the left or right, or from the rear while you are driving in reverse, a warning sound is activated continuously and a warning is displayed on the multi-information display and the active driving display.

Multi-information display

  1. “BRAKE!” message is displayed

 

Active driving display

  1. “BRAKE!” message is displayed

 

During brake control, the collision warning sound is activated intermittently.

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