WARNING   WARNING:  You are responsible for controlling your vehicle at all times. The system is designed to be an aid and does not relieve you of your responsibility to drive with due care and attention. Failure to follow this instruction could result in the loss of control of your vehicle, personal injury or death.
WARNING   WARNING:  The system does not detect vehicles that are driving in a different direction, pedestrians, cyclists or animals. Apply the brakes when necessary. Failure to follow this instruction could result in the loss of control of your vehicle, personal injury or death.
WARNING   WARNING:  The system is not designed to detect non-metallic objects and does not reliably detect some objects with limited metallic surfaces. For example, recreational vehicles, motorcycles and guard rails. Apply the brakes when necessary. Failure to follow this instruction could result in the loss of control of your vehicle, personal injury or death.
WARNING   WARNING:  The system does not operate during hard acceleration or steering. Failure to take care may lead to a crash or personal injury.
WARNING   WARNING:  The system may not operate properly during severe weather conditions, for example snow, ice, heavy rain and spray. Always drive with due care and attention. Failure to take care may result in a crash.
WARNING   WARNING:  Some situations and objects prevent hazard detection. For example low or direct sunlight, inclement weather, unconventional vehicle types, and pedestrians. Apply the brakes when necessary. Failure to follow this instruction could result in the loss of control of your vehicle, personal injury or death.
WARNING   WARNING:  The system cannot help prevent all crashes. Do not rely on this system to replace driver judgment and the need to maintain a safe distance and speed.
WARNING   WARNING:  Take additional care if your vehicle is heavily loaded or you are towing a trailer. These conditions could result in reduced performance of this system. Failure to follow this instruction could result in the loss of control of your vehicle, personal injury or death.

Using the Pre-Collision Assist System
If your vehicle is approaching a stationary vehicle in your lane of travel, the system provides an Alert. Stationary vehicle detection is active at speeds above approximately 10 mph (16 km/h).
Collision Alert
If your vehicle is rapidly approaching another vehicle traveling in the same direction as yours, the system provides two levels of functionality:
  1. Alert.
  1. Active Braking.
Collision Alert
Alert: When active, a flashing visual warning appears and an audible warning tone sounds.
Active Braking: Active Braking is active at speeds above approximately 15 mph (24 km/h). Active braking may activate if the system determines that a collision is imminent. The system may help the driver reduce impact damage or avoid the crash completely.
Pre-Collision Assist Settings
Active braking turns on every time you switch the ignition on. You cannot adjust the Pre-Collision Assist settings.
Note:   We recommend that you switch the system off if you install a snow plow or similar object in such a way that it may block the radar sensor. Your vehicle remembers the system status across key cycles.
Blocked Sensors
Air Brake Specific Pre-Collision Assist Sensor
1Radar sensor.
The information display shows a blocked sensor message to indicate a sensor obstruction. The radar sensor is located behind the bumper and mounted to the frame below the center of the grille. If you install a snow plow or similar object, you may block the radar sensor. With a blocked sensor, the Pre-Collision Assist system may not function, or performance may reduce. The following table lists possible causes and actions for when this message displays.
Radar Troubleshooting

Cause   Action  
The surface of the radar in the grille is dirty or obstructed in some way.   Clean the grille surface in front of the radar or remove the object causing the obstruction.  
The surface of the radar in the grille is clean but the message remains in the display screen.   Wait a short time. It may take several minutes for the radar to detect that there is no obstruction.  
Heavy rain, spray, snow or fog is interfering with the radar signals.   The Pre-Collision Assist system is temporarily disabled. Pre-Collision Assist automatically reactivates a short time after the weather conditions improve.  
Swirling water or snow or ice on the surface of the road may interfere with the radar signals.   The Pre-Collision Assist system is temporarily disabled. Pre-Collision Assist automatically reactivates a short time after the weather conditions improve.  
Radar is out of alignment due to a front end impact.   Contact an authorized dealer to have the radar checked for proper coverage and operation.  

Note:   If something hits the front end of your vehicle or damage occurs and your vehicle has a radar sensor, the radar sensing zone may change. This could cause missed or false vehicle detections. Contact an authorized dealer to have the radar checked for proper coverage and operation.

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