Mazda 3 Owners Manual: Smart City Brake Support (SCBS)

The Smart City Brake Support (SCBS) system is designed to reduce damage in the event of a collision by operating the brake control (SCBS brake) when the system's laser sensor (front) detects a vehicle ahead and determines that a collision with a vehicle ahead is unavoidable. It may also be possible to avoid a collision if the relative speed between your vehicle and a vehicle ahead is less than about 15 km/h (9.3 mph).

In addition, when the driver depresses the brake pedal while the system is in the operation range at about 4 to 30 km/h (2 to 18 mph), the brakes are applied firmly and quickly to assist. (Brake Assist (SCBS brake assist))

NOTE

• The Smart City Brake Support (SCBS) system will not operate if the driver is deliberately performing driving operations (accelerator pedal and steering wheel).
• The Smart City Brake Support (SCBS) system will operate under the following conditions.

• The engine is running.
• The Smart City Brake Support (SCBS) warning light (amber) does not illuminate.
• The vehicle speed is between about 4 to 30 km/h (2 to 18 mph).
• The Smart City Brake Support (SCBS) system is not turned off.
• The DSC operation is not turned off using the DSC OFF switch.
• The DSC is not malfunctioning.

• The Smart City Brake Support (SCBS) detects a vehicle ahead by emitting a near-infrared laser beam and receiving the beam reflected off the reflector of the vehicle ahead, and then using it for the measurement. Consequently, the Smart City Brake Support (SCBS) may not operate under the following conditions:

• Reflection of the laser is poor due to the shape of the vehicle ahead.
• The vehicle ahead is significantly dirty.
• Under bad weather condition, such as rain, fog and snow.
• The window washer is being used or the windshield wipers are not used when it's raining.
• The windshield is dirty.
• The steering wheel is turned completely left or right, or the vehicle is accelerated rapidly and comes close to the vehicle ahead.
• Trucks with low loading platforms and vehicles with an extremely low or high profile.
• Vehicles with certain shapes such as a vehicle carrier.

• Under the following conditions, the Smart City Brake Support (SCBS) system may not operate normally.

• Heavy luggage is loaded in the luggage compartment or on the rear seat.
• If there is the possibility of partial contact with a vehicle ahead.
• When driving on continuously curving roads, and entering and exiting exits.
• Elongated luggage or cargo is loaded onto installed roof rails and covers the laser sensor (front).
• Exhaust gas from the vehicle in front, sand, snow, and water vapor rising from manholes and grating, and water splashed into the air.
• When towing a malfunctioning vehicle.

• In the following cases, the laser sensor (front) may inadvertently determine that there is a vehicle ahead and the Smart City Brake Support (SCBS) system may operate.

• Objects on the road at the entrance to a curve.
• Vehicles passing in the opposite lane while making a curve.
• Metal objects, bumps, or protruding objects on the road.
• When passing through a toll gate.
• When passing under a vinyl curtain or flag.
• Plastic objects such as pylons.
• Two-wheeled vehicles, pedestrians, animals or standing trees.
• Vehicle is driven with some of the tires having significant wear.

• When the system operates, the user is notified by the flashing Smart City Brake Support (SCBS) indicator light (red) and the active driving display * .
• The Smart City Brake Support (SCBS) warning light (amber) turns on when the system has a malfunction.

  Refer to Warning Lights on .

Smart City Brake Support (SCBS) Indicator Light (Red)

If the Smart City Brake Support (SCBS) is operating, the indicator light (red) flashes.

Stopping the Smart City Brake Support (SCBS) System Operation

The Smart City Brake Support (SCBS) system can be temporarily deactivated.

Refer to Personalization Features on .

When the Smart City Brake Support (SCBS) system is turned off, the Smart City Brake Support (SCBS) OFF indicator light turns on.

When the engine is restarted, the system becomes operational.

NOTE When the DSC OFF switch is pressed to stop the DSC operation, the Smart City Brake Support (SCBS) system operation also stops and the Smart City Brake Support (SCBS) OFF indicator light turns on.