WARNING   WARNING:  You must remain in your vehicle when the system turns on. At all times, you are responsible for controlling your vehicle, supervising the system and intervening, if required. Failure to take care may result in the loss of control of your vehicle, serious personal injury or death.
WARNING   WARNING:  The system does not detect vehicles that are driving in a different direction, 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 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 fail or operate with reduced function during cold and severe weather conditions. Snow, ice, rain, spray and fog can adversely affect the system. Keep the front camera and radar free of snow and ice. Failure to take care may result in the loss of control of your vehicle, serious personal injury or death.
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.

Using the Pre-Collision Assist System
The system is active at speeds above 3 mph (5 km/h) and pedestrian detection is active at speeds up to 50 mph (80 km/h).
Missing Image
If your vehicle is rapidly approaching another stationary vehicle, a vehicle traveling in the same direction as yours, or a pedestrian within your driving path, the system provides three levels of functionality:
  1. Alert.
  1. Brake support.
  1. Active braking.
Missing ImageMissing Image
Alert: When active, a flashing visual warning and an audible warning tone sounds.
Brake support: The system helps reduce the impact speed by preparing the brakes for rapid braking. The system does not automatically apply the brakes. If you press the brake pedal, the system can apply additional braking up to maximum braking force, even if you lightly press the brake pedal.
Active braking: It activates if the system determines that a collision is about to occur. The system may help the driver reduce impact damage or completely avoid the crash.
Note:   Brake support and active braking are active at speeds up to 74.6 mph (120 km/h). If your vehicle has a radar sensor with adaptive cruise control, then brake support and active braking are active up to the maximum speed of your vehicle.
Note:   If you perceive pre-collision assist alerts as being too frequent or disturbing, you can reduce the alert sensitivity, though the manufacturer recommends using the highest sensitivity setting. Setting lower sensitivity would lead to fewer and later system warnings.
Note:   The system turns off when you manually disable AdvanceTrac™, or when you select track mode.
Distance Indication and Alert
Distance indication and alert provides a graphical indication of the time gap to other preceding vehicles traveling in the same direction. The distance indication and alert screen in the information display shows an image similar to the one that follows.
Missing Image
If the time gap to a preceding vehicle is small, a red visual indication displays to the driver.
Note:   Distance indication and alert deactivates and the images do not display when adaptive cruise control is active.

Speed   Sensitivity   Images   Distance Gap   Time Gap  
62 mph (100 km/h)   Normal   Grey   >82 ft (25 m)   >0.9sec  
62 mph (100 km/h)   Normal   Yellow   56–82 ft (17–25 m)   0.6sec - 0.9sec  
62 mph (100 km/h)   Normal   Red   <56 ft (17 m)   <0.6sec  

Adjusting Pre-Collision Assist Settings
Adjust the alert and distance alert sensitivity to one of three possible settings by using the information display control.   See   Information Displays
You can switch the distance alert and indication function off using the information display controls.   See   Information Displays
You can switch active braking off using the information display controls.   See   Information Displays
Note:   Active braking turns on every time you switch your vehicle on.
Blocked Sensors
Missing Image
1Camera.
2Radar sensor.
If a message regarding a blocked sensor or camera appears in the information display, the radar signals or camera images are detecting an obstruction. If your vehicle has a radar sensor, it is behind the fascia cover in the center of the lower grille. With a blocked sensor or camera, the pre-collision assist system may not operate, or performance may reduce. The following table lists possible causes and actions for when this message displays.
Camera Troubleshooting

Cause   Action  
The windshield in front of the camera is dirty or the sensor is detecting an obstruction.   Clean the outside of the windshield in front of the camera.  
The windshield in front of the camera is clean but the message remains in the display screen.   Wait a short time. It could take several minutes for the camera to detect that there is no obstruction.  

Radar Troubleshooting

Cause   Action  
The surface of the radar in the grille is dirty or the sensor is detecting an obstruction.   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 could 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 temporarily turns off. Pre-collision assist 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 temporarily turns off. Pre-collision assist 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 check the radar for proper coverage and operation.  

Note:   Proper system operation requires a clear view of the road by the camera. Repair any windshield damage in the area of the camera's field of view.
Note:   If something hits the front end of your vehicle or damage occurs, the radar sensing zone may change. This could cause missed or false vehicle detections. Contact an authorized dealer to check the radar for proper coverage and operation.
Note:   If your vehicle detects excessive heat at the camera or a potential misalignment condition, a message may display in the information display indicating temporary sensor unavailability. When operational conditions are correct, the message deactivates. For example, when the ambient temperature around the sensor decreases or the sensor successfully recalibrates.