Precautions For Intelligent Brake Assist

The IBA system is a not collision avoidance system. It is the driver's responsibility to stay alert, drive safely and be in control of the vehicle at all times.
As there is a performance limit, it may not provide a warning or brake in certain conditions.
The system will not detect the following objects:
- Pedestrians, animals, or obstacles in the roadway
- Oncoming vehicles in the same lane
The system will not detect under the following conditions:
- When the sensor gets dirty and it is impossible to detect the distance from the vehicle ahead.
- When driving into a strong light (i.e. sunlight)
The sensor generally detects the signals returned from the reflectors on a vehicle ahead. Therefore, the system may not function properly under the following conditions:
- When the reflectors of the vehicle ahead are positioned high or close each other (including a small vehicle such as motorcycles).
- When the sensor gets dirty or and it is impossible to detect the distance from the vehicle ahead.
- When the reflectors on the vehicle ahead is missing, damaged or covered.
- When the reflector of the vehicle ahead is covered with dirt, snow and road spray.
- When visibility is low, such as rain, fog, snow, etc.
- When snow or road spray from traveling vehicles are raised up.
- When dense exhaust or other smoke (black smoke) from vehicles reduces the sensor visibility.
- When excessively heavy baggage is loaded in the rear seat or the luggage room of vehicle.
- When abruptly accelerating or decelerating.
- On steep downhill or roads with sharp curves.
- When there is a highly reflective object near the vehicle ahead (ie,) very close to other vehicle, signboard, etc.
- While towing a trailer.
Depending on certain road conditions (curved, beginning of a curve), vehicle conditions, steering position, vehicle position, or preceding vehicle's conditions, position in lane, etc. the system may not function properly.
The system may not function in offset conditions.
The system may not function when the distance to the vehicle ahead is extremely close.
The system detect highly reflective objects such as reflectors, signs, white markers, and other stationary objects on the road or near the traveling lane, and when in extreme conditions, detection of these objects may cause the system to function.
The system is designed to automatically check the sensor's functionality. If the sensor is covered with ice, a transparent or translucent plastic bag, etc., the system may not detect them. In these instances the system may not be able to warn properly. Be sure to check and clean the sensor regularly.
Excessive noise will interfere with the warning chime sound, and the chime may not be heard.
Never step in under the brake pedal to avoid an accident when IBA system turns on.

Fig 1: Precautions For Intelligent Brake Assist
Courtesy of NISSAN MOTOR CO., U.S.A.
Sudden appearance of the vehicle in front (ie, it abruptly cuts in) may not be detected and the system may not warn soon enough.
The system will be cancelled automatically with a beep sound and the IBA OFF indicator lamp will illuminate under the following conditions:
- When the sensor window is dirty
- When the system malfunctions