Nissan LEAF 2023 Owners Manual
9.17.8.2. IEB with pedestrian detection system limitations
Listed below are the system limitations for the IEB system. Failure to operate the vehicle in accordance with these system limitations could result in serious injury or death.
The IEB system cannot detect all vehicles or pedestrians under all conditions.
The IEB system does not detect the following:
Pedestrians that are small (for example, children), in a sitting position, operating toys/skateboards, on scooters or in wheelchairs, or not in an upright standing or walking position.
Animals of any size.
Obstacles (for example, cargo or debris) on the roadway or roadside.
Oncoming or crossing vehicles.
Vehicles where the tyres are difficult to see or the shape of the rear of the vehicle is unclear or obstructed.
Parked vehicles.
The IEB system has some performance limitations.
If a stationary vehicle is in the vehicle's path, the IEB system will not function when the vehicle is driven at speeds over approximately 80 km/h (50 MPH).
Pedestrian detection will not function when the vehicle is driven at speeds over approximately 60 km/h (37 MPH) or below approximately 10 km/h (6 MPH).
For pedestrians, the IEB system will not issue the first warning.
The IEB system may not function properly or detect a vehicle or pedestrian ahead in the following conditions:
In poor visibility conditions (such as rain, snow, fog, dust storms, sand storms, smoke, and road spray from other vehicles).
If dirt, ice, snow, fog or other material is covering the radar sensor area or camera area of the windscreen.
If strong light (for example, sunlight or high beams) enters the front camera or a sudden change in brightness occurs (for example, entering a tunnel or driving in lightning).
In dark or dimly lit conditions, such as at night or in tunnels, including cases where your vehicle’s headlights are off or dim, or the tail lights of the vehicle ahead are off.
When the direction of the camera is misaligned.
When driving on a steep downhill slope, on roads with sharp curves, and/or bumpy or dirt roads.
If there is interference by other radar sources.
When your vehicle’s position or movement is changed quickly or significantly (for example, lane change, turning vehicle, abrupt steering, sudden acceleration or deceleration).
When your vehicle or the vehicle or pedestrian ahead moves quickly or significantly such that the system cannot detect and react in time (for example, pedestrian moving quickly toward the vehicle at close range, vehicle cutting in, changing lanes, making a turn, steering abruptly, sudden acceleration or deceleration).
When the vehicle or pedestrian is offset from the vehicle’s forward path.
If the speed difference between the two vehicles is small.
The pedestrian’s profile is partially obscured or unidentifiable; for example, due to transporting luggage, pushing a stroller, wearing bulky or very loose-fitting clothing or accessories, or being in a unique posture (such as raising hands).
There is poor contrast of a person to the background, such as having clothing colour or pattern which is similar to the background.
For approximately 15 seconds after starting the EV system.
If the vehicle ahead has a unique or unusual shape, extremely low or high clearance heights, or unusual cargo loading or is narrow (for example, a motorcycle).
When the vehicle or pedestrian is located near a traffic sign, a reflective area (for example, water on road), or is in a shadow.
When multiple pedestrians are grouped together.
When the view of the pedestrian is obscured by a vehicle or other object.
The system performance may degrade in the following conditions:
The vehicle is driven on a slippery road.
The vehicle is driven on a slope.
Excessively heavy luggage is loaded in the rear seat or the luggage area of your vehicle.
The system is designed to automatically check the sensor’s (radar and camera) functionality, within certain limitations. The system may not detect some forms of obstruction of the sensor area such as ice, snow or stickers, for example. In these cases, the system may not be able to warn the driver properly. Be sure that you check, clean and clear sensor areas regularly.
In some road and traffic conditions, the IEB system may unexpectedly apply partial braking. When acceleration is necessary, depress the accelerator pedal to override the system.
The IEB system may operate when a pattern, object, shadow or lights are detected that are similar to the outline of vehicles, pedestrians or if they are the same size and position as a vehicle’s tail lights.
The system may keep operating when the vehicle ahead is turning right or left.
The system may operate when your vehicle is approaching and passing a vehicle ahead.
Depending on the road shape (curved road, entrance and exit of the curve, winding road, lane regulation, under construction, etc.), the system may operate temporarily for the oncoming vehicle in front of your vehicle.
The IEB system may react to:
objects on the roadside (traffic sign, guardrail, pedestrian, vehicle, etc.)
objects above road (low bridge, traffic sign, etc.)
objects on the road surface (railroad track, grate, steel plate, etc.)
objects in the parking garage (beam, pillar, etc.)
pedestrians or motorcycles approaching the travelling lane
vehicles, pedestrians or objects in adjacent lanes or close to the vehicle
oncoming pedestrians
objects on the road (such as trees)
A pedestrian approaches the driving lane in front of the vehicle.
Braking distances increase on slippery surfaces.
Excessive noise will interfere with the warning chime sound, and the chime may not be heard.
When driving on some roads, such as winding, hilly, curved, narrow roads, or roads which are under construction, the sensor may detect vehicles in a different lane, or may temporarily not detect a vehicle travelling ahead. This may cause the system to work inappropriately.
The detection of vehicles may also be affected by vehicle operation (steering manoeuvre or travelling position in the lane, etc.) or vehicle condition. If this occurs, the system may warn you by blinking the system indicator and sounding the chime unexpectedly. You will have to manually control the proper distance to the vehicle travelling ahead.