Infiniti QX: Intelligent Brake Assist (IBA) system (if so equipped)
The Intelligent Brake Assist (IBA) system warns the driver by a warning light and chime when there is a risk of a collision with the vehicle ahead in the traveling lane and the driver must take avoidance action immediately. The system helps reduce the rear-end collision speed by applying the brakes when the system judges that the collision cannot be prevented. The IBA system will function when your vehicle is driven at speeds of approximately 10 MPH (15 km/h) and above, and when your vehicle is driven at speeds approximately 10 MPH (15 km/h) faster than the vehicle ahead.
The IBA system uses a distance sensor A located below the front bumper to measure the distance to the vehicle ahead. When the system judges that your vehicle is getting close to the vehicle ahead in the traveling lane, the vehicle ahead detection indicator on the instrument panel blinks and a warning chime sounds. The IBA system will be turned on/off by pushing the IBA OFF switch. The IBA OFF indicator light will illuminate when the system is turned off.
Precautions on IBA system
WARNING
► The IBA system is not a 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, the
system may not provide a warning or
braking in certain conditions.
► The system will not detect the following
objects:
— Pedestrians, animals or obstacles in
the roadway
— Motorcycles traveling offset in the
traveling lane
— Oncoming vehicles in the same lane
► The system will not detect another
vehicle 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 (for
example 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 to
each other (including a small vehicle
such as motorcycles).
— When the sensor gets dirty and it is
impossible to detect the distance
from the vehicle ahead.
— When the reflectors on the vehicle
ahead are missing, damaged or
covered.
— When the reflectors of the vehicle
ahead are covered with dirt, snow or
road spray.
— When visibility is low (such as rain,
fog, snow, etc.).
— When snow or road spray from
traveling vehicles is splashed.
— When dense exhaust or other smoke
(black smoke) from vehicles reduces
the visibility of the sensor.
— When excessively heavy baggage is
loaded in the rear seat or the
luggage room of your vehicle.
— When abruptly accelerating or decelerating.
— On a steep downhill slope or on
roads with sharp curves.
— When there is a highly reflective
object near the vehicle ahead (for
example being very close to another
vehicle, signboard, etc.).
— When towing a trailer or other
vehicle.
► Depending on certain road conditions
(curved or beginning of a curve), vehicle
conditions (steering position or vehicle
position), or the 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.
WARNING
► The system may detect highly reflective
objects such as reflectors, signs, white
markers and other stationary objects on
the road or near the traveling lane.
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 the driver 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.
► A sudden appearance of a vehicle in
front (for example it abruptly cuts in)
may not be detected and the system may
not warn the driver soon enough.
► The system will be cancelled automatically
with a beep sound and the IBA
warning light will illuminate under the
following conditions:
— When the sensor window is dirty
— When the system malfunctions
If the IBA OFF indicator light illuminates with a beep sound, pull off the road to a safe location, stop the vehicle and turn the engine off. Check to see if the sensor window is dirty. If the sensor window is dirty, clean it with a soft cloth and restart the engine. If the sensor window is not dirty, restart the engine. If the IBA OFF indicator light continues to illuminate even if the IBA system is turned on, have the system checked by an INFINITI retailer.
IBA system operation
The IBA system will function when your
vehicle is driven at speeds of approximately
10 MPH (15 km/h) or above, and
when the vehicle’s speed is approximately
10 MPH (15 km/h) faster than that of the
vehicle ahead.
To turn the system off or on, push and hold
the IBA OFF switch B (located on the
lower side of the instrument panel) for
more than 1 second after starting the
engine. When the IBA OFF indicator light
A on the instrument panel turns off and
the IBA OFF switch is pushed, the system
will turn off and the IBA OFF indicator light will illuminate. When the IBA OFF
switch is
pushed again, the system will turn on and
the IBA OFF indicator light will turn off.
The IBA system will remain in the last ON
or OFF state it was left in until it is
manually changed by pressing the IBA
OFF switch.
Illumination of the IBA OFF indicator light
without a beep sound is an indication that
the IBA system is temporarily unavailable.
It will occur under the following conditions:
► When driving into a strong light (for
example, sunlight)
► When the 4WD shift switch is in the 4H
or 4L position (for 4WD models)
The IBA OFF indicator light will turn off
when the system returns to its normal
operating conditions.
For the sensor maintenance, see “Intelligent
Cruise Control (ICC) system” earlier in
this section.
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