INFINITI QX56 2011 Factory Service Manual

CCS-166
< SYMPTOM DIAGNOSIS >[ICC]
CHIME DOES NOT SOUND
CHIME DOES NOT SOUND
DescriptionINFOID:0000000006224449
Symptom check: In the following conditions, the warni
ng chime may not sound even if the vehicle distance is
short.
 When the vehicles are traveling at the same s peed and the distance between vehicles is not changing.
 When the vehicle ahead is traveling faster and t he distance between vehicles is increasing.
 The warning chime will not sound when the accelera tor pedal is depressed, overriding the system.
 The warning chime will not sound when own vehicle approaches vehicles that are parked or moving slowly.
 The warning chime does not sound when the system does not detect any vehicle ahead. (Diagnose the con-
ditions under which the system is detecting the vehicle ahead and when the system is malfunctioning. If
there is any malfunction in detecting the v ehicle ahead, check the system following the CCS-169, "
Descrip-
tion".)
Diagnosis ProcedureINFOID:0000000006224450
1.PERFORM ACTIVE TEST
Check if the warning chime sounds on the active test item “ICC BUZZER” of “ICC/ADAS” with CONSULT-III.
Does the warning chime sound?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK THE MALFUNCTION SYMPTOM D URING WARNING CHIME OPERATION
Understand the vehicle ahead detecting condition when the malfunction occurred. If the warning chime should
have sounded, replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 8.
3.CHECK ICC WARNING CHIME CIRCUIT
Check the meter buzzer circuit. Refer to WCS-40, "
Component Function Check".
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 6.
4.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the “U1000” is detected in self-diagnosis results of “ICC/ADAS”.
Is
“U1000” detected?
YES >> GO TO 5.
NO >> GO TO 7.
5.CAN COMMUNICATIONS SYSTEM INSPECTION
Check the CAN communication system and repair or replace malfunctioning parts. Refer to CCS-145, "
ADAS
CONTROL UNIT : DTC Logic".
>> INSPECTION END
6.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.
>> GO TO 8.
7.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 8.
Revision: 2010 May2011 QX56

CCS
CHIME DOES NOT SOUNDCCS-167
< SYMPTOM DIAGNOSIS > [ICC]
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8.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS-168
< SYMPTOM DIAGNOSIS >[ICC]
DRIVING FORCE IS HUNTING
DRIVING FORCE IS HUNTING
DescriptionINFOID:0000000006224451
The vehicle causes hunting when the ICC system is active.
Diagnosis ProcedureINFOID:0000000006224452
1.PERFORM SELF-DIAGNOSIS OF ECM
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the DTC is detected in self-diagnosis results of “ENGINE”. Refer to EC-98, "
DTC Index".
Is any DTC detected?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ICC SENSOR BODY WINDOW
1. Check the vehicle driving conditions. Refer to CCS-169, "
Description".
2. Check the ICC sensor body window for contaminat ion, foreign materials, or cracks. Refer to CCS-169,
"Diagnosis Procedure".
>> INSPECTION END
3.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts identified by the self-diagnosis result.
>> GO TO 4.
4.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perfo rm “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS
FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD / DETECTION ZONE IS
SHORT
CCS-169
< SYMPTOM DIAGNOSIS > [ICC]
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FREQUENTLY CANNOT DETECT TH E VEHICLE AHEAD / DETECTION
ZONE IS SHORT
DescriptionINFOID:0000000006224453
The detection function may become unstable in the following cases.
 When the reflector of the vehicle ahead is def icient/ not clean enough to reflect ICC sensor.
 When driving a road with extremely sharp corners.
 When the sensor cannot detect the reflector of the vehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
Diagnosis ProcedureINFOID:0000000006224454
1.VISUAL CHECK (1)
Check ICC sensor body window for cont amination and/or foreign materials.
Do foreign materials adhere?
YES >> GO TO 2.
NO >> GO TO 3.
2.WIPE OUT DIRT AND FOREIGN MATERIALS
Wipe out the contamination and/or foreign ma terials from the ICC sensor body window.
>> GO TO 7.
3.VISUAL CHECK (2)
Check ICC sensor body window for cracks and scratches.
Are there any cracks or scratches?
YES >> GO TO 5.
NO >> GO TO 4.
4.ADJUST LASER BEAM AIMING
1. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
2. Perform ICC system action test. Refer to CCS-77, "
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 ICC sensor. Refer to CCS-176, "
Exploded View".
2. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
3. Perform ICC system action test. Refer to CCS-77, "
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 ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 7.
7.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
Revision: 2010 May2011 QX56

CCS-170
< SYMPTOM DIAGNOSIS >[ICC]
FREQUENTLY CANNOT DETECT THE VEHI
CLE AHEAD / DETECTION ZONE IS
SHORT
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS
THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
CCS-171
< SYMPTOM DIAGNOSIS > [ICC]
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THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
DescriptionINFOID:0000000006224455
When ICC system is active, the ICC system does not perform any control even through there is a vehicle
ahead.
Diagnosis ProcedureINFOID:0000000006224456
1.CHECK ICC SYSTEM DISPLAY ON MULTI INFORMATION DISPLAY
1. Start the self-diagnosis mode of combination meter. Refer to MWI-29, "
On Board Diagnosis Function".
2. Check that the multi information display turns on normally.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the combination meter.
2.VISUAL CHECK (1)
Check ICC sensor body window for cont amination and/or foreign materials.
Do foreign materials adhere?
YES >> GO TO 3.
NO >> GO TO 4.
3.WIPE OUT DIRT AND FOREIGN MATERIALS
Wipe out the contamination and/or foreign ma terials from the ICC sensor body window.
>> GO TO 8.
4.VISUAL CHECK (2)
Check ICC sensor body window for cracks and/or scratches.
Are there cracks?
YES >> GO TO 6.
NO >> GO TO 5.
5.LASER BEAM AIMING ADJUSTMENT
1. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
2. Perform ICC system action test. Refer to CCS-77, "
Description".
3. Check that the vehicle ahead detection performance improves.
Does it improve?
YES >> INSPECTION END
NO >> GO TO 6.
6.REPLACE ICC SENSOR
1. Replace the ICC sensor. Refer to CCS-176, "
Exploded View".
2. Adjust the laser beam aiming. Refer to CCS-72, "
Description".
3. Perform ICC system action test. Refer to CCS-77, "
Description".
4. Check that the vehicle ahead detection performance improves.
Does it improve?
YES >> INSPECTION END
NO >> GO TO 7.
7.REPLACE ADAS CONTROL UNIT
Replace ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 8.
8.CHECK ICC SYSTEM
Revision: 2010 May2011 QX56

CCS-172
< SYMPTOM DIAGNOSIS >[ICC]
THE SYSTEM DOES NOT DETECT
THE VEHICLE AHEAD AT ALL
1. Erase the self-diagnosis results, and then perfo rm “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS
NORMAL OPERATING CONDITIONCCS-173
< SYMPTOM DIAGNOSIS > [ICC]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006224457
PRECAUTIONS FOR VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
 ICC 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.
 The system is primarily intended for use on straight, dry, open roads with light traffic. It is not advisable to
use the system in city traffic or congested areas.
 This system will not adapt automatically to road condi tions. This system should be used in evenly flowing
traffic. Do not use the system on roads with sharp curves, or on icy roads, in heavy rain or in fog.
 The ICC sensor will not detect under most conditions.
- Stationary and slow moving vehicles.
- Pedestrians or objects in the roadway.
- Oncoming vehicles in the some 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 ICC 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.
 If the vehicle ahead comes to a stop, the vehicle decelerat es 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 and sound a warning
chime. To prevent the vehicle from movi ng, the driver must depress the brake pedal.
 The system may not detect the vehicle in front of the dr iver in certain road or weather conditions. To avoid
accidents, never use the ICC syst em under the following conditions:
- On roads where the traffic is heavy or there are 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 the windshield wipers are operating at high speed. The ICC system may cancel when the wipers are
set to the AUTO position.
- 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 (the vehicle may go beyond the set vehicle speed and frequent braking may result
in overheating the brakes).
- On repeated uphill and downhill roads.
- When traffic conditions make it difficult to keep a proper distance between vehicles because of frequent
acceleration or deceleration.
- 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. The driver may need to c ontrol the distance from other vehicles using the
accelerator pedal. Always stay alert and avoid using t he ICC system when it is not recommended in this sec-
tion.
 The vehicle-to-vehicle distance control mode uses a sensor located on the front of the vehicle to detect vehi-
cles traveling ahead. The sensor generally detects t he signals returned from the reflectors on a vehicle
ahead. Therefore, if the sensor c annot detect the reflector on the v ehicle ahead, the ICC system may not
maintain the selected distance.
 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.
- When the vehicle is towing a trailer, etc.
 The ICC system is designed to automatic ally check the sensor's operation within the limitation of the system.
When the sensor is covered with dirt or is obstruct ed, the system will automatically be canceled. If the sen-
sor is covered with ice, a transparent or translucent vinyl bag, etc., the ICC system may not detect them. In
these instances, the vehicle-to-vehicle distance control mode may not cancel and may not be able to main-
tain the selected following distance from the vehicle ahead. Be sure to check and clean the sensor regularly.
Revision: 2010 May2011 QX56

CCS-174
< SYMPTOM DIAGNOSIS >[ICC]
NORMAL OPERATING CONDITION
 The ICC system does not control vehicle speed or warn
the driver when own vehicle approaches stationary
and slow moving vehicles. The driver must pay attent ion to vehicle operation to maintain proper distance
from vehicles ahead when approaching toll gates or traffic congestion.
 The detection zone of the ICC sens or is limited. A vehicle ahead
must be in the detection zone for the vehicle-to-vehicle distance
detection mode to maintain the selected distance from the vehicle
ahead. 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 ICC system may warn the driver by
blinking the system indicator and sounding the chime. The driver
may have to manually control the proper distance away from vehi-
cle traveling ahead.
 When driving on some roads, such as winding, hilly, curved, nar- row roads, or roads which are under construction, the ICC sensor
may detect vehicles in a differ ent lane, or may temporarily not
detect a vehicle traveling ahead. This may cause the ICC system
to decelerate or accelerate the vehicle. The detection of vehicles
may also be affected by vehicle operation (steering maneuver or
traveling position in the lane, et c.) or vehicle condition. If this
occurs, the ICC system may warn the 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.
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Revision: 2010 May2011 QX56

CCS
NORMAL OPERATING CONDITIONCCS-175
< SYMPTOM DIAGNOSIS > [ICC]
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 When driving on the freeway at a set speed and approaching a slower traveling vehicle ahead, the ICC will adjust the speed to
maintain the distance, selected by the driver, from the vehicle
ahead. If the vehicle ahead changes lanes or exits the freeway, the
ICC system will accelerate and maintain the speed up to the set
speed. Pay attention to the driving operation to maintain control of
the vehicle as it accelerates to the set speed. The vehicle may not
maintain the set speed on winding or hilly roads. If this occurs, the
driver will have to manually control the vehicle speed.
 The sensor sensitivity can be affected by vehicle oper ation (steering maneuver or driving position in the
lane) or traffic or vehicle condition (for exampl e, if a vehicle is being driven with some damage).
 Normally when controlling the distance to a vehicle ahead, this system automatically accelerates or deceler-
ates own vehicle according to the speed of the vehi cle ahead. Depress the accelerator to properly acceler-
ate own vehicle when acceleration is required for a lane change. Depress the brake pedal when
deceleration is required to maintain a safe distance to the vehicle ahead due to its sudden braking or if a
vehicle cuts in. Always stay alert when using the ICC system.
PRECAUTIONS FOR CONVENTIONAL (F IXED SPEED) CRUISE CONTROL MODE
 In the conventional (fixed speed) cruise control mode, a warning chime does not sound to warn the driver if
own vehicle is too close to the vehicle ahead, as nei ther the presence of the vehicle ahead nor the vehicle-
to-vehicle distance is detected.
 Pay special attention to the distance between own v ehicle and the vehicle ahead or a collision could occur.
 Always confirm the setting in the ICC system display.
 Do not use the conventional (fixed speed) cruise c ontrol mode when driving under the following conditions:
- When it is not possible to keep the vehicle at a set speed.
- In heavy traffic or in traffic that varies in speed.
- On winding or hilly roads.
- On slippery roads (rain, snow, ice, etc.).
- In very windy areas.
 Doing so could cause a loss of vehicle control and result in an accident.
 To avoid accidentally engaging cruise control, make sure to the MAIN switch OFF when not using ICC sys- tem.
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Revision: 2010 May2011 QX56