Infiniti QX56 (Z62). Manual - part 293

DAS

THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL

DAS-209

< SYMPTOM DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

2.

Check that the DCA system is normal. 

>> INSPECTION END

DAS-210

< SYMPTOM DIAGNOSIS >

[DCA]

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000006223665

PRECAUTIONS FOR DISTANCE CONTROL ASSIST (DCA) SYSTEM

• If the vehicle ahead comes to a stop, the vehicle decelerates to a standstill within the limitations of the sys-

tem. The system will cancel once it judges that the vehicle has come to a standstill with a warning chime. To
prevent the vehicle from moving, the 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 safely and be in control of the vehicle at all times.

• This system will not adapt automatically to road conditions. 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 control function, never rely solely on the DCA system. This

system does not correct careless, inattentive 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 surrounding circumstances in order to maintain a safe distance
between vehicles.

• The system may not detect the vehicle in front of own vehicle 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 object 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) from 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 automatically 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 system 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 the DCA system cannot decelerate the vehicle quickly
enough. If this occurs, the DCA system will sound a warning 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 operation to maintain proper distance from vehicles ahead.

DAS

NORMAL OPERATING CONDITION

DAS-211

< SYMPTOM DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

• 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 decelerates 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 illuminated, 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 decelerates to a standstill within the limitations of the

system. The system will release brake control with a warning chime once it judges the vehicle is at a stand-
still. To prevent the vehicle from moving, the driver must depress the brake pedal. [The system will resume
control automatically once the system reaches 5 km/h (3 MPH)].

JPOIA0221ZZ

JPOIA0220ZZ

DAS-212

< REMOVAL AND INSTALLATION >

[DCA]

ICC SENSOR

REMOVAL AND INSTALLATION

ICC SENSOR

Exploded View

INFOID:0000000006228177

CAUTION:

Always perform the laser beam aiming adjustment and check the operation after the replacement,
removal and installation of ICC sensor. 

Removal and Installation

INFOID:0000000006228178

REMOVAL

1.

Remove front under cover. Refer to 

EXT-25, "Exploded View"

.

2.

Disconnect the connector of ICC sensor.

3.

Remove the bolts.

4.

Remove ICC sensor from front bumper reinforcement.
NOTE:
Remove ICC sensor from under the bumper.

INSTALLATION

Install in the reverse order of removal.

CAUTION:

Always perform the laser beam aiming adjustment and check the operation after the replacement,
removal, and installation of ICC sensor. Refer to 

CCS-71, "Description"

. 

1.

ICC sensor

2.

Front bumper reinforcement

JSOIA0363ZZ