2011 INFINITI QX56 Factory Service Manual

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Page 1169 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-204
< SYMPTOM DIAGNOSIS >[DCA]
CHIME DOES NOT SOUND
>> GO TO 9.
8.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 9.
9.CHECK DCA

Page 1170 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
NO FORCE GENERATED FOR PUTTING BACK THE ACCELERATOR PEDALDAS-205
< SYMPTOM DIAGNOSIS > [DCA]
C
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NO FORCE GENERATED FOR PUTTI NG BACK THE ACCELERATOR
PEDAL
DescriptionIN

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INFINITI QX56 2011 Factory Service Manual
DAS-206
< SYMPTOM DIAGNOSIS >[DCA]
FREQUENTLY CANNOT DETECT THE VEHI
CLE AHEAD / DETECTION ZONE IS
SHORT
FREQUENTLY CANNOT DETECT TH E VEHICLE AHEAD / DETECTION
ZONE IS SHORT
DescriptionINFOID:00000

DAS-206
< SYMPTOM DIAGNOSIS >[DCA]
FREQUENTLY CANNOT DETECT THE VEHI
CLE AHEAD / DETECTION ZONE IS
SHORT
FREQUENTLY CANNOT DETECT TH E VEHICLE AHEAD / DETECTION
ZONE IS SHORT
DescriptionINFOID:0000000006223661
Symptom check: Detection function may bec ome unstable under the following conditions.
When the reflector of vehicle ahead is broken or dirty.
When the vehicle is driving on a curve such as S-curve where the curvature changes.
When the vehicle is driving on up-and-down road or passi ng the peak or foot of slope or passing the break of
the inclination of hill.
Diagnosis ProcedureINFOID:0000000006223662
1.VISUAL CHECK (1)
Check ICC sensor body window for contamination and foreign materials.
Do foreign materials adhere?
YES >> GO TO 2.
NO >> GO TO 3.
2.WIPE OUT DIRT AND FOREIGN OBJECTS
Wipe out the contamination and/or foreign materials from the ICC sensor body window.
>> GO TO 7.
3.VISUAL CHECK (2)
Check ICC sensor body window for cracks and/or scratches.
Are there cracks?
YES >> GO TO 5.
NO >> GO TO 4.
4.LASER BEAM AIMING ADJUSTMENT
1. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
2. Perform action test. Refer to DAS-128, "
Description".
3. Check that the vehicle ahead detection performance improves.
Does it improve?
YES >> INSPECTION END
NO >> GO TO 5.
5.REPLACE ICC SENSOR
1. Replace the ICC sensor. Refer to DAS-212, "
Exploded View".
2. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
3. Perform action test. Refer to DAS-128, "
Description".
4. Check that the vehicle ahead detection performance improves.
Does it improve?
YES >> INSPECTION END
NO >> GO TO 6.
6.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 7.
7.CHECK DCA SYSTEM
1. Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to DAS-128, "
Description" for action test.)
2. Check that the DCA system is normal.
Revision: 2010 May2011 QX56

Page 1172 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD / DETECTION ZONE IS
SHORT
DAS-207
< SYMPTOM DIAGNOSIS > [DCA]
C
D
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F
G H
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N P A
>> INSPECTION END
Revision: 2010 May2011 QX56

Page 1173 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-208
< SYMPTOM DIAGNOSIS >[DCA]
THE SYSTEM DOES NOT DETECT
THE VEHICLE AHEAD AT ALL
THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
DescriptionINFOID:0000000006223663
When DCA system is activ

Page 1174 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
DAS-209
< SYMPTOM DIAGNOSIS > [DCA]
C
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2. Check that the DCA system is normal. >> INSPECTION END
Revision: 2010 May

Page 1175 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-210
< SYMPTOM DIAGNOSIS >[DCA]
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006223665
PRECAUTIONS FOR DISTANCE CONTROL ASSIST (DCA) SYSTEM
If the vehicle ahead

DAS-210
< SYMPTOM DIAGNOSIS >[DCA]
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006223665
PRECAUTIONS FOR DISTANCE CONTROL ASSIST (DCA) SYSTEM
If the vehicle ahead comes to a stop, the vehicle deceler
ates to a standstill within the limitations of the sys-
tem. The system will cancel once it judges that the vehi cle has come to a standstill with a warning chime. To
prevent the vehicle from moving, t he driver must depress the brake pedal.
The DCA system will not apply brake control while the driver is depressing the accelerator pedal.
This system is only an aid to assist the driver and is not a collision warning or avoidance device. It is the
driver's responsibility to stay alert, drive safe ly and be in control of the vehicle at all times.
This system will not adapt automatically to road condi tions. Do not use the system on roads with sharp
curves, or on icy roads, in heavy rain or in fog.
The distance sensor will not detect under most conditions.
- Stationary and slow moving vehicles
- Pedestrians or objects in the roadway
- Oncoming vehicles in the same lane
- Motorcycles traveling offset in the travel lane
As there is a performance limit to the distance contro l function, never rely solely on the DCA system. This
system does not correct careless, inat tentive or absent-minded driving, or overcome poor visibility in rain,
fog, or other bad weather. Decelerate the vehi cle speed by depressing the brake pedal, depending on the
distance to the vehicle ahead and the surrounding circumstances in order to maintain a safe distance
between vehicles.
The system may not detect the vehicle in front of own v ehicle in certain road or weather conditions. To avoid
accidents, 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 strong light (for example, at sunrise or sunset) is directly shining on the front of the vehicle
- When rain, snow or dirt adhere to the system sensor
- On steep downhill roads (frequent braking may result in overheating the brakes)
- On repeated uphill and downhill roads
- When towing a trailer or other vehicle
In some road or traffic conditions, a vehicle or objec t can unexpectedly come into the sensor detection zone
and cause automatic braking. Driver may need to control the distance from other vehicles using the acceler-
ator pedal. Always stay alert and avoid using the DCA system when it is not recommended in this section.
The following are some conditions in which the sensor cannot detect the signals.
- When the reflector of the vehicle ahead is positioned high on the vehicle (trailer, etc.)
- When the reflector 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 the snow or road spray from traveling vehicles reduces the sensor's visibility
- When dense exhaust or other smoke (black smoke) fr om vehicles reduces the sensor's visibility
- When excessively heavy baggage is loaded in the rear seat or the luggage room of own vehicle
The DCA system is designed to autom atically 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 trans-
parent or translucent vinyl bag, etc., the DCA syste m may not detect them. In these instances, the DCA sys-
tem may not be able to decelerate the vehicle properly. Be sure to check and clean the sensor regularly.
The DCA system is designed to help assist the driver to maintain a following distance from the vehicle
ahead. The system will decelerate as necessary and if the vehicle ahead comes to a stop, the vehicle decel-
erates to standstill. However, the DCA system can only apply up to 25% of the vehicles total braking power.
If a vehicle moves into the traveling lane ahead or if a vehicle traveling ahead rapidly decelerates, the dis-
tance between vehicles may become closer because t he DCA system cannot decelerate the vehicle quickly
enough. If this occurs, the DCA system will sound a warn ing chime and blink the system display to notify the
driver to take necessary action.
The DCA system does not control vehicle speed or warn when driver approach stationary and slow moving
vehicles. Driver must pay attention to vehicle operat ion to maintain proper distance from vehicles ahead.
Revision: 2010 May2011 QX56

Page 1176 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
NORMAL OPERATING CONDITIONDAS-211
< SYMPTOM DIAGNOSIS > [DCA]
C
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N P A
The detection zone of the sensor is limited. A vehicle ahead must be in the detection zone for the sy

DAS
NORMAL OPERATING CONDITIONDAS-211
< SYMPTOM DIAGNOSIS > [DCA]
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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 center line 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 driver by blinking the
system indicator and sounding the chime. The driver may have to
manually control the proper distance away from vehicle traveling
ahead.
- When driving on some roads, such as winding, hilly, curved, nar- row roads, or roads which are under construction, the sensor may
detect vehicles in a different lane, or may temporarily not detect a
vehicle traveling ahead. This may cause the system to work inap-
propriately. The detection of vehicles may also be affected by vehi-
cle operation (steering maneuver or traveling position in the lane,
etc.) or vehicle condition. If this occurs, the system may warn
driver by blinking the system indicator and sounding the chime
unexpectedly. The driver will have to manually control the proper
distance away from the vehicle traveling ahead.
The approach warning chime may sound and the system display may blink when the sensor detects some reflectors which are fitted
on vehicles in other lanes or on the side of the road. This may
cause the DCA system to operate inappropriately. The sensor may
detect these reflectors when the vehicle is driven on winding
roads, hilly roads or when entering or exiting a curve. The sensor
may also detect reflectors on narrow roads or in road construction
zones. In these cases driver will have to manually control the
proper distance ahead of own vehicle. Also, the sensor sensitivity
can be affected by vehicle operation (steering maneuver or driving
position in the lane) or traffic or vehicle condition (for example, if a
vehicle is being driven with some damage).
The DCA system automatically dec elerates own vehicle to help
assist the driver to maintain a following distance from the vehicle
ahead. Manually brake when deceleration is required to maintain a safe distance upon sudden braking by
the vehicle ahead or when a vehicle suddenly appears in front of own vehicle. Always stay alert when using
the DCA system.
When the vehicle ahead detection indicator lamp is not illum inated, system will not control or warn the driver.
Never place a foot under the brake pedal. A foot may be caught when the system controls the brake.
Depending on the position of the accelerator pedal, the system may not be able to assist the driver to
release the accelerator pedal appropriately.
If the vehicle ahead comes to a standstill, the vehicle decel erates to a standstill within the limitations of the
system. The system will rel ease brake control with a warning chime once it judges the vehicle is at a stand-
still. To prevent the vehicle from moving, the driv er must depress the brake pedal. [The system will resume
control automatically once the system reaches 5 km/h (3 MPH)].
JPOIA0221ZZ
JPOIA0220ZZ
Revision: 2010 May2011 QX56

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