CMBS Dashboard Light Indicator Meaning

CMBS Collision Mitigation Braking System

When there is a chance of your car colliding with a vehicle or a person identified in front of you, the CMBS Collision Mitigation Braking System may aid you. When a collision is considered inevitable, the CMBS is meant to inform you and limit your vehicle speed to assist lessen impact severity.

Discover more about the CMBS Collision Mitigation Braking System. The Honda Collision Mitigation Braking System (CMBS) is an essential driver-assist technology that can detect a possible front-end collision and lessen potential impact by alerting the driver to engage the brakes. CMBS is a component of the Honda Sensing® safety package, which comes standard on many new Honda cars, and it delivers peace of mind on roads.

Honda CMBS

How Does CMBS™ Work?

Featuring a radar transmitter mounted in the front grille trim, CMBS™ can determine the distance and closing speed of obstacles ahead of you. If the radar and high-resolution camera detects another vehicle or a pedestrian in front of the car, it will provide both visual and audio warnings. If you do not immediately respond, the system will automatically apply the brakes.

What Are the Stages When Danger is Detected?

There are three stages or levels of response that CMBS™ deploys when a possible collision is detected. These stages include:

  • Stage 1: Visual and audio warnings alert you of an oncoming obstacle ahead of the vehicle.
  • Stage 2: The brakes are lightly applied to slow down the vehicle and help avoid a collision.
  • Stage 3: The brakes are applied strongly in order to dramatically reduce your speed.

Your attention should be focused on driving, so the third stage shouldn’t be needed. However, knowing that it’s part of the system response will provide extra confidence to your Torrington-area commute.

Important Note:

The CMBS system will not be able to apply enough braking force to prevent all collisions. CMBS also cannot detect all objects ahead; the driver must intervene in certain situations, and must always be attentive when using the system. Also, CMBS may not go through all three stages, and may automatically engage the final stage if the system deems it necessary.

Important Safety Reminder

The CMBSTM is designed to reduce the severity of an unavoidable collision. It does not prevent collisions nor stop the vehicle automatically. It is still your responsibility to operate the brake pedal and steering wheel appropriately according to the driving conditions.

The CMBSTM may not activate or may not detect a vehicle in front of your vehicle under certain conditions:

■ Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between objects and the background.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Roadway objects or structures are misinterpreted as vehicles and pedestrians.
• Reflections on the interior of the front windshield.
• Driving at night or in a dark place such as a tunnel (due to low-light conditions,
pedestrians or other vehicles may not be detected).

■ Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks, reflected lights, road spray, high contrast).
• Driving on curvy, winding, or undulating roads.
• The road is hilly or the vehicle is approaching the crest of a hill.

■ Vehicle conditions

• Headlight lenses are dirty or the headlights are not properly adjusted.
• The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.
• The inside of the windshield is fogged.
• An abnormal tire or wheel condition (wrong sized, varied size or construction, improperly inflated, etc.).
• When tire chains are installed.
• The vehicle is tilted due to a heavy load or suspension modifications.
• The camera temperature gets too high.
• Driving with the parking brake applied.
• When the radar sensor in the front grille gets dirty.
• Driving at night or in a dark place (e.g., a tunnel) with the headlights off.

The system may automatically shut off and the CMBS indicator will come on under certain conditions. Some examples of these conditions are listed above. Other conditions may reduce some of the CMBS functions.


4 Common FAQS for CMBS

Will Honda CMBS halt the vehicle?

Honda Sensing has adaptive cruise control, a Collision Mitigation Braking System, lane-departure warning, a Road Departure Mitigation System, and lane centering aid. Some Hondas, in addition to adaptive cruise control, have low-speed follow, which allows the car to stop and go in heavy traffic.

How do you permanently disable collision mitigation brakes?

To disable CMBS, just press and hold the CMBS button (placed to the left of the steering column) until you hear an audible beep and a message shows on the Multi-Information Display. The CMBS will remain inactive until the engine is turned off.

How do I reset my Honda collision mitigation brake system?

The system can only be reset by stopping the automobile, turning off the ignition, and then restarting the engine. While travelling at 50 mph, the Collision Mitigation Braking System activated, causing the vehicle to brake without warning.

Why is my CMBS light on?

The light illuminates if the system has been turned off, if the radar sensor is filthy or blocked, or if there is a failure in the system. In the second situation, a simple car wash may be sufficient to restore system functionality. In the worst-case scenario, take the vehicle to your dealer or an authorized service center for diagnosis and repair.

Compiled and researched with ❤️by Erwin Salarda.