sensor INFINITI QX80 2021 Repair Manual

JVS1238X
DCA SYSTEM DISPLAY AND IN-
DICATORS
The display is located between the speed-
ometer and tachometer.
1. Vehicle ahead detection indicator:Indicates whether it detects a vehicle in
front of you.
2. DCA system indicator: The indicator will appear in orange if
there is a malfunction in the DCA system.
DCA SYSTEM LIMITATIONS
WARNING
Listed below are the system limitations
of the DCA system. Failure to operate
the vehicle in accordance with these
system limitations could result in serious
injury or death.
.This system will not adapt automati-
cally to road conditions. Do not use
the system on roads with sharp
curves, or on icy roads, in heavy rain
or in fog.
. The DCA system will not apply brake
control while the driver’s foot is on
the accelerator pedal.
. As there is a performance limit to the
distance control function, never rely
solely on the DCA system. This sys-
tem does not correct careless, inat-
tentive or absent-minded driving, or
overcome poor visibility in rain, fog,
or other bad weather. Decelerate the
vehicle speed by depressing the brake
pedal, depending on the distance to
the vehicle ahead and the surround-
ing circumstances in order to main-
tain a safe distance between vehicles. .
The system may not detect the
vehicle in front of you in certain road
or weather conditions. To avoid ac-
cidents, never use the DCA system
under the following conditions:
— On roads with sharp curves
— On slippery road surfaces such as on ice or snow, etc.
— On off-road surfaces such as on sand or rock, etc.
— During bad weather (rain, fog, snow, etc.)
— When rain, snow or dirt adhere to the system sensor
— On steep downhill roads (fre- quent braking may result in over-
heating the brakes)
— On repeated uphill and downhill roads
— When towing a trailer or other vehicle
. In some road or traffic conditions, a
vehicle or object can unexpectedly
come into the sensor detection zone
and cause automatic braking. You
may need to control the distance
from other vehicles using the accel-
erator pedal. Always stay alert and
Starting and driving5-91

5-92Starting and driving
avoid using the DCA system when it
is not recommended in this section.
The radar sensor will not detect the follow-
ing objects:
. Stationary and slow moving vehicles
. Pedestrians or objects in the roadway
. Oncoming vehicles in the same lane
. Motorcycles traveling offset in the travel
lane
The following are some conditions in which
the sensor cannot detect the signals:
. When the snow or road spray from
traveling vehicles reduces the sensor’s
visibility
. When excessively heavy baggage is
loaded in the rear seat or the luggage
room of your vehicle
SSD0252
The detection zone of the sensor is limited. A
vehicle ahead must be in the detection zone
for the system to operate.
A vehicle ahead may move outside of the
detection zone due to its position within the
same lane of travel. Motorcycles may not be
detected in the same lane ahead if they are
traveling offset from the centerline of the
lane. A vehicle that is entering the lane ahead
may not be detected until the vehicle has
completely moved into the lane. If this
occurs, the system may warn you by blink-
ing the system indicator and sounding the
chime. The driver may have to manually
control the proper distance away from
vehicle traveling ahead.

SSD0253
When driving on some roads, such as wind-
ing, 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 travel-
ing ahead. This may cause the system to
work inappropriately.
The detection of vehicles may also be
affected by vehicle operation (steering man-
euver or traveling 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 unexpect-
edly. You will have to manually control the
proper distance away from the vehicle
traveling ahead.
SYSTEM TEMPORARILY UNA-
VAILABLE
Condition A:
Under the following conditions, the DCA
system is automatically canceled. The chime
will sound and the following message will
appear. The system will not be able to be set.
. “Currently unavailable”:
— When the VDC system is off (To use the DCA system, turn on the VDC,
then push the dynamic driver assis-
tance switch.)
For details about the VDC system,
see “Vehicle Dynamic Control (VDC)
system” (P.5-125).
— When the SNOW mode switch is ON (To use the DCA system, turn off the
SNOW mode switch, then turn on the
dynamic driver assistance switch
.)
For details about the SNOW mode
switch, see “SNOW mode switch”
(P.2-52).
— When the 4WD shift switch is in the 4H or 4L position (for 4WD models)
— When the radar signal is temporarily interrupted
. “Not available: Poor Road Conditions”:
— When the VDC or ABS (including the traction control system) operates
Starting and driving5-93

5-94Starting and driving
Action to take:
When the conditions listed above are no
longer present, turn the system off with the
dynamic driver assistance switch
. Turn the
DCA system back on to use the system.
. If the vehicle is parked in direct sunlight
under high temperature conditions (over
approximately 104 °F (40 °C)) and then
started, the DCA system may be deacti-
vated automatically and the “Unavail-
able: High Accelerator Temperature”
message will appear in the vehicle in-
formation display for a period of time.
Action to take:
When the interior temperature is reduced,
turn on the DCA system again.
Condition B:
Under the following conditions, making it
impossible to detect a vehicle ahead, the
DCA system is automatically canceled.
The chime will sound, the DCA system
indicator (orange) will come on and the
“Not Available: Front Radar Blocked” warn-
ing message will appear in the vehicle
information display.
. When the radar sensor area of the front
bumper is covered with dirt or is ob-
structed Action to take:
If the DCA system indicator (orange) comes
on and the warning message appears, stop
the vehicle in a safe place, place the shift
lever in the P (Park) position and turn the
engine off. When the radar signal is tem-
porarily interrupted, clean the sensor area of
the front bumper and restart the engine. If
the warning message continues to be dis-
played, have the DCA system checked. It is
recommended you visit an INFINITI retailer
for this service.
.
When driving on roads with limited road
structures or buildings (for example, long
bridges, deserts, snow fields, driving next
to long walls)
Action to take:
When the above conditions no longer exist,
turn the DCA system back on to use the
system.
SYSTEM MALFUNCTION
Condition:
When the DCA system is not operating
properly, the chime sounds and the system
warning message “Malfunction” will appear.
Action to take:
If the warning message appears, park the
vehicle in a safe place. Turn the engine off,
restart the engine, and turn on the DCA
system again.
If it is not possible to set the system or the
indicator stays on, it may indicate that the
system is malfunctioning. Although the
vehicle is still driveable under normal con-
ditions, have the vehicle checked. It is
recommended you visit an INFINITI retailer
for this service.

JVS1154X
SENSOR MAINTENANCE
The sensor for the DCA systemis located
behind the grille of the front bumper.
The DCA system is designed to automati-
cally check the sensor’s operation. When the
sensor is covered with dirt or is obstructed,
the system will automatically be canceled. If
the sensor is covered with ice, a transparent
or translucent vinyl bag, etc., the DCA
system may not detect them. In these
instances, the DCA system may not be able
to decelerate the vehicle properly. Be sure to
check and clean the sensor regularly.
To keep the DCA system operating properly,
be sure to observe the following: .
Always keep the sensor area of the front
bumper clean.
. Do not strike or damage the areas around
the sensor.
. Do not cover or attach stickers or similar
objects on the front bumper near the
sensor area. This could cause failure or
malfunction.
. Do not attach metallic objects near the
sensor area (brush guard, etc.). This
could cause failure or malfunction.
. Do not alter, remove or paint the front
bumper. Before customizing or restoring
the front bumper, it is recommended you
contact an INFINITI retailer.
Radio frequency statement
Model: ARS4–A
IC: 4135A-ARS4A
FCC ID: OAYARS4A
This device complies with Part 15 of the FCC
Rules and with Industry Canada licence
exempt RSS standard(s). Operation is sub-
ject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interfer- ence received, including interference
that may cause undesired operation.
WARNING
Failure to follow the warnings and
instructions for proper use of the FEB
with pedestrian detection system could
result in serious injury or death.
.The FEB with pedestrian detection
system is a supplemental aid to the
driver. It is not a replacement for the
driver’s attention to traffic condi-
tions or responsibility to drive safely.
It cannot prevent accidents due to
carelessness or dangerous driving
techniques.
. The FEB with pedestrian detection
system does not function in all driv-
ing, traffic, weather and road condi-
tions.
The FEB with pedestrian detection system
can assist the driver when there is a risk of a
forward collision with the vehicle ahead in
the traveling lane or with a pedestrian.
Starting and driving5-95
FORWARD EMERGENCY BRAKING
(FEB) WITH PEDESTRIAN DETECTION

5-96Starting and driving
JVS1158X
The FEB with pedestrian detection system
uses a radar sensorlocated behind the
grille of the front bumper to measure the
distance to the vehicle ahead in the same
lane.
For pedestrians, the FEB system uses a
camera
installed behind the windshield in
addition to the radar sensor.WAF0320X
Vehicle ahead detection indicator
FEB warning indicator
FEB system warning light

5-98Starting and driving
JVS1214X
TURNING THE FEB WITH PE-
DESTRIAN DETECTION SYSTEM
ON/OFF
Perform the following steps to turn the FEB
with pedestrian detection system ON/OFF.
1. Push the MENU button
and touch
[Driver Assistance] on the lower display.
2. Touch [Emergency Assist].
3. Touch [Emergency Braking] to turn the system ON/OFF.
When the FEB system with pedestrian
detection is turned off, the FEB system
warning light (orange) illuminates. The FEB
with pedestrian detection system will be automatically turned ON when the engine is
restarted. The displayed keys on the lower
display may vary depending on models,
specifications and software version.
NOTE:
The FEB with pedestrian detection system
will be automatically turned ON when the
engine is restarted. The Predictive Forward
Collision Warning (PFCW) system is inte-
grated into the FEB with pedestrian detec-
tion system. There is not a separate
selection in the display for the PFCW
system. When the FEB with pedestrian
detection system is turned off, the PFCW
system is also turned off.
FEB WITH PEDESTRIAN DETEC-
TION SYSTEM LIMITATIONS
WARNING
Listed below are the system limitations
for the FEB with pedestrian detection
system. Failure to operate the vehicle in
accordance with these system limita-
tions could result in serious injury or
death.
.
The FEB with pedestrian detection
system cannot detect all vehicles or
pedestrians under all conditions. .
The radar sensor FEB with pedes-
trian detection system does not de-
tect the following objects:
— Small pedestrians (including small children), animals and cyclists.
— Pedestrians in wheelchairs or using mobile transport such as
scooters, child-operated toys, or
skateboards.
— Pedestrians who are seated or otherwise not in a full upright
standing or walking position.
— Oncoming vehicles
— Crossing vehicles
— Obstacles on the roadside
. The FEB with pedestrian detection
system has some performance limita-
tions.
— If a stationary vehicle is in the vehicle’s path, the FEB with pe-
destrian detection system will not
function when the vehicle is driven
at speeds over approximately 50
MPH (80 km/h).
— For pedestrian detection, the FEB with pedestrian detection
system will not function when
the vehicle is driven at speeds

over approximately 37 MPH (60
km/h) or below approximately 6
MPH (10 km/h).
. The FEB with pedestrian detection
system will not function for pedes-
trians in darkness or in tunnels, even
if there is street lighting in the area.
. For pedestrians, the FEB with pedes-
trian detection system will not issue
the first warning and will not push
the accelerator pedal up.
. The FEB with pedestrian detection
system may not function if the vehi-
cle ahead is narrow (for example a
motorcycle).
. The FEB with pedestrian detection
system may not function if speed
difference between the two vehicles
is too small.
. The radar sensor FEB with pedes-
trian detection system may not func-
tion properly or detect a vehicle
ahead in the following conditions:
— Poor visibility (conditions such as rain, snow, fog, dust storms,
sandstorms, and road spray from
other vehicles)
— Driving on a steep downhill slope or roads with sharp curves. — Driving on a bumpy road surface,
such as an uneven dirt road.
— If dirt, ice, snow or other material is covering the radar sensor area.
— Interference by other radar sources.
— The camera area of windshield is fogged up, or covered with dirt,
water drops, ice, snow, etc.
— Strong light (for example, sun- light or high beams from oncom-
ing vehicles) enters the front
camera. Strong light causes the
area around the pedestrian to be
cast in a shadow, making it diffi-
cult to see.
— A sudden change in brightness occurs. (For example, when the
vehicle enters or exits a tunnel or a
shaded area or lightning flashes.)
— The poor contrast of a person to the background, such as having
clothing color or pattern which is
similar to the background.
— The pedestrian’s profile is par- tially obscured or unidentifiable
due to the pedestrian transport-
ing luggage, wearing bulky or very
loose-fitting clothing or acces- sories.
— When towing a trailer or other vehicle.
. The system performance may de-
grade in the following conditions:
— The vehicle is driven on a slippery road.
— The vehicle is driven on a slope.
— Excessively heavy baggage is loaded in the rear seat or the
luggage area of your vehicle.
. The system is designed to automati-
cally check the sensor (radar and
camera)’s functionality, within cer-
tain limitations. The system may not
detect blockage of sensor areas cov-
ered by 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 FEB with pedestrian detection
system may unexpectedly apply par-
tial braking. When acceleration is
necessary, depress the accelerator
pedal to override the system.
. Excessive noise will interfere with the
warning chime sound, and the chime
Starting and driving5-99

SSD0253
When driving on some roads, such as wind-
ing, hilly, curved, narrow roads, or roads
which are under construction, the radar
sensor may detect vehicles in a different
lane, or may temporarily not detect a vehicle
traveling ahead. This may cause the FEB
with pedestrian detection system to work
inappropriately.
The detection of vehicles may also be
affected by vehicle operation (steering man-
euver or traveling position in the lane, etc.) or
vehicle condition.If this occurs, the system
may warn you by blinking the vehicle ahead
detection indicator and sounding the chime
unexpectedly. You will have to manually
control the proper distance away from the vehicle traveling ahead.
WAF0318X
SYSTEM TEMPORARILY UNA-
VAILABLE
Condition A
In the following conditions, the FEB system
warning light (orange)will illuminate or
blink and the system will be turned off
automatically.
. The radar sensor picks up interference
from another radar source.
. The camera area of windshield is misted
or frozen.
. Strong light is shining from the front.
. The cabin temperature is over approxi-
mately 104°F (40°C) in direct sunlight.
Starting and driving5-101

5-102Starting and driving
.The camera area of windshield glass is
continuously covered with dirt, etc.
Action to take:
When the above conditions no longer exist,
the FEB with pedestrian detection system
will resume automatically.
NOTE:
When the inside of the windshield on
camera area is misted or frozen, it will take
a period of time to remove it after air
conditioner turns on. If dirt appears on this
area, it is recommended you visit an
INFINITI retailer.
Condition B
Under the following conditions, making it
impossible to detect a vehicle ahead, the
FEB with pedestrian detection system is
automatically turned off.
The FEB system warning light (orange)
will illuminate and the “Not Available: Front
Radar Blocked” warning message will ap-
pear in the vehicle information display.
. When the sensor area of the front
bumper is covered with dirt or is ob-
structed
Action to take:
If the FEB system warning light (orange)
comes on, stop the vehicle in a safe place,
place the shift lever in the P (Park) position and turn the engine off. Clean the radar
cover below the front bumper with a soft
cloth, and restart the engine. If the FEB
system warning light continues to illuminate,
have the FEB with pedestrian detection
system checked. It is recommended you visit
an INFINITI retailer for this service.
.
When driving on roads with limited road
structures or buildings (for example, long
bridges, deserts, snow fields, driving next
to long walls)
Action to take:
When the above conditions no longer exist,
the FEB with pedestrian detection system
will resume automatically.
Condition C
When the accelerator pedal actuator detects
that the internal motor temperature is high,
the FEB with pedestrian detection system is
automatically turned off. The FEB system
warning light (orange)
will illuminate.
Action to take:
When the above conditions no longer exist,
the FEB with pedestrian detection system
will resume automatically.
Condition D
When VDC system is OFF, the FEB brake
will not operate. In this case only visible and
audible warning operates. The FEB system warning light (orange)
will illuminate.
Action to take:
When VDC system is ON, the FEB with
pedestrian detection system will resume
automatically.
SYSTEM MALFUNCTION
If the FEB with pedestrian detection system
malfunctions, it will be turned off automa-
tically, a chime will sound, the FEB system
warning light (orange)
will illuminate and
the warning message “Malfunction” will
appear.
Action to take:
If the warning light (orange)
comes on,
stop the vehicle in a safe location and place
the shift lever in the P (Park) position. Turn
the engine off and restart the engine. If the
warning light continues to illuminate, have
the FEB with pedestrian detection system
checked. It is recommended you visit an
INFINITI retailer for this service.
NOTE:
If the FEB with pedestrian detection system
stops working, the PFCW system will also
stop working.