Collision Mitigation Brake System (CMBS) Description - Overview (2017)

The CMBS can detect a possible collision and assist brake operation to reduce the impact on occupants and vehicle damage.

Courtesy of HONDA, U.S.A., INC.

CMBS Operation Sequence:

1.
When a speed difference between your vehicle and the leading vehicle or the pedestrian in front of your vehicle is greater than 3 mph (5 km/h) and the system detects a possible collision, the system issues a warning message on the multi information display (MID), sets an alarm off and flashes the head up warning.
2.
When your vehicle is getting close to the leading vehicle or the pedestrian ahead of your vehicle, the system issues a warning message on the MID and sets an alarm off to give the warning to the driver that there is a possible collision (First step). For an opposing vehicle, the system vibrates the steering wheel to give an additional warning to the driver.
3.
When your vehicle gets even closer to the leading vehicle or the pedestrian ahead of your vehicle and the system anticipates a collision, the CMBS applies light braking force while issuing the MID warning and setting an alarm off (Second step).
4.
When the system determines that a collision is inevitable, the CMBS applies strong brake force while issuing the MID warning and setting an alarm off (Third step).

Courtesy of HONDA, U.S.A., INC.

The braking force does not change whether the object is a pedestrian or a vehicle.
The multipurpose camera unit records the number of operations from when the vehicle is turned to the ON mode to the OFF (LOCK) mode. When the limit for the number of operations is exceeded, "excessive CMBS operation" is judged and the CMBS function is disabled. The warning indicator comes on and DTCs are stored. The limit for the number of operations differs according to the CMBS operation conditions.
When the multipurpose camera is malfunctioning (including a temporary function stop), CMBS does not function.

Operation Conditions

		Vehicle Ahead	Opposite Vehicle	Pedestrian
Conditions for the object		Passenger vehicles, subcompact, or large vehicle (The system may have difficulty recognizing two wheeled vehicles, like motorcycles, or other unusual body styles. The system will function as designed if the vehicles are detected.).		Adult (judgment basically is by body height. Analysis is performed for compatibility with human patterns, which were programmed in advance), an analysis for children is performed when detection was successful. Pedestrians behind the vehicle, and pedestrians crossing the road: In some cases, pedestrians crossing the road may not be detected if they jump out onto the road or are running. Depending on shape and material, human shaped posters and signs along the road may be detected.
System operation conditions	Operation vehicle speed	About 3 mph (5 km/h) or more	Between about 3 mph (5 km/h) and 62 mph (100 km/h)
	Relative velocity	About 3 mph (5 km/h) or more	About 9 mph (15 km/h) or more	About 3 mph (5 km/h) or more
	Environment conditions*	There is sufficient visibility and light available for the multipurpose camera to recognize objects In environments where millimeter wave transmission/reception is not blocked (Some weather conditions such as fog, snowfall may have impact on system operation)

*: For more details on environmental conditions and objects that are hard to be recognized, refer to the Owner's Manual. However, these are not selectable when CMBS is turned OFF.

Customization

The alarm activation distance can be set in 3 steps.