INFINITI QX56 2008 Factory Service Manual

CCS
ICC SYSTEM DOES NOT CANCEL WHEN A/T SELECTOR LEVER SETS ON "N"
CCS-61
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ICC SYSTEM DOES NOT CANCEL WHEN A/T SELECTOR LEVER SETS
ON "N"
Diagnosis ProcedureINFOID:0000000001744725
1.CHECK D RANGE SWITCH
1. With "DATA MONITOR", check that “NP RANGE SW” operates normally.
Does the monitor item display normally?
YES >> Replace ICC unit and erase DTC. Refer to CCS-70, "ICC Unit". Perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 2
2.CHECK CAN COMMUNICATION
1. With self-diagnosis, check “CAN COMM CIRCUIT”.
Does "CAN COMM CIRCUIT" display with self-diagnosis?
YES >> Refer to CCS-24, "DTC 20 CAN COMM CIRCUIT".
NO >> GO TO 3
3.CHECK NP RANGE SWITCH
1. With "DATA MONITOR", check that “N” position switch operates normally.
Does the monitor item display normally?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit". Perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test".
NO >> Repair or replace as necessary. Perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS-62
< SYMPTOM DIAGNOSIS >
CHIME DOES NOT SOUND
CHIME DOES NOT SOUND
Diagnosis ProcedureINFOID:0000000001744726
The chime may not sound occasionally in the following cases even if the distance from the vehicle ahead is
short:
• When the speed difference from that of the vehicle ahead is small (both vehicles driving at similar speed).
• When the vehicle ahead drives at faster s peed (the actual distance is increasing).
• When depressing the accelerator.
• Chime does not sound when the vehicle is not driving.
• Chime does not sound when the system does not detect any vehicle ahead. Diagnose the conditions under which the system is detecting the vehicle ahead and when the system is malfunctioning. If there is any mal-
function in detecting the vehicle ahead. Refer to CCS-64, "
Diagnosis Procedure".
1.CHECK ICC WARNING CHIME
Check warning chime operation.
Did the ICC warning chime fail to operate?
YES >> Determine preceding vehicle detection status when malfunction occurred. If chime should have sounded replace ICC unit. Refer to CCS-70, "
ICC Unit". Perform ICC system running test. Refer
to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 2
2.CAN COMMUNICATION INSPECTION
1. With -self-diagnosis, check “CAN COMM CIRCUIT”.
Does "CAN COMM CIRCUIT" display with self-diagnosis?
YES >> Refer to CCS-24, "DTC 20 CAN COMM CIRCUIT".
NO >> Replace combination meter. Refer to MWI-76, "
Removal and Installation". Erase DTC and per-
form ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS
DRIVING FORCE IS HUNTINGCCS-63
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DRIVING FORCE IS HUNTING
Diagnosis ProcedureINFOID:0000000001744727
1.CHECK ECM
1. Perform self-diagnosis of ECM.
Does the ECM pass the self-diagnosis test?
YES >> Refer to CCS-64, "Diagnosis Procedure".
NO >> Repair as necessary. Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS-64
< SYMPTOM DIAGNOSIS >
ICC SYSTEM FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD/ DETEC-TION ZONE IS SHORT
ICC SYSTEM FREQUENTLY CANNOT DETECT THE VEHICLE AHEAD/
DETECTION ZONE IS SHORT
Diagnosis ProcedureINFOID:0000000001744728
The detection function may become disrupted in the following cases:
• When the reflector of the vehicle ahead is small or not clean enough to reflect the laser.
• When driving a road with extremely sharp corners.
• When the laser cannot detect the reflector of the v ehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
1.VISUAL CHECK
1. Check ICC sensor body window for contamination and foreign materials.
Is the ICC sensor window clean and free of obstruction?
YES >> GO TO 2
NO >> If any contamination or foreign materials ar e found, remove them. Then perform ICC system run-
ning test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2.CHECK FUNCTION
1. After performing laser beam aiming adjustment, perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test". Check that preceding vehicle detection performance has
been improved.
Is the ICC system operating normally?
YES >> INSPECTION END.
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS
THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
CCS-65
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THE SYSTEM DOES NOT DETECT THE VEHICLE AHEAD AT ALL
Diagnosis ProcedureINFOID:0000000001744729
1.VISUAL CHECK
With ignition switch turned ON (engine not started), che ck that all indicator lamps in ICC system display are
continuously lit. (Check for a missing segment in preceding vehicle detection display.)
Does the display operate normally?
YES >> GO TO 2
NO >> Check combination meter. Refer to MWI-24, "
Diagnosis Description".
2. VISUAL CHECK
Check ICC sensor window for contamination and foreign materials.
Is the ICC sensor window clean and free of obstruction?
YES >> If any contamination or foreign materials are found, remove them. Perform ICC system running
test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 3
3.VISUAL CHECK
Check ICC sensor window for cracks and scratches.
Is the ICC sensor window intact?
YES >> GO TO 4
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
4.ADJUST ICC SENSOR
• After performing laser beam aiming adjustment, perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test". Check that preceding vehicle detection performance has been improved.
Is the ICC system operating normally?
YES >> INSPECTION END.
NO >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to CCS-71, "
ICC Sen-
sor".
• Perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
Revision: March 2010 2008 QX56

CCS-66
< SYMPTOM DIAGNOSIS >
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000001731913
PRECAUTIONS FOR VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
• Intelligent Cruise Control is functionally limited. This never support careless driving and low visibility (rain,fog, etc.). Drive the vehicle safely. Keep a safe di stance between vehicles by decreasing the vehicle speed
according to the driving condition etc.
• Intelligent Cruise Control never stop the vehicle autom atically. Intelligent Cruise Control is automatically
released, and the buzzer sounds if any vehicle ahead is not detected when the vehicle speed is approxi-
mately 35 km (21.5 MPH) or less.
• Use this system when the vehicle speed does not extr emely change. This system may not properly function
when any vehicle cuts in, or when the vehicle ahead s uddenly applies the brake. Then, the warning (buzzer
and indication) activates.
• Never use Intelligent Cruise Control in the following conditions.
- A well-trafficed road, and a tight turn. It may cause any accident because the dr iving does not fit to the road condition.
- A slippery road (e.g., freezing, or snowy road) The vehicle may lose the control by wheelspin.
- The vehicle drives in bad whet her (rain, fog, snow etc.).
The distance from the vehicle ahead is not detected pr ecisely if the whether condition is bad. Intelligent
Cruise Control is released automatically if the wiper activates in low or high speed.
- The vehicle receives bright light (sunshine etc.). The distance from the vehicle ahead is not detected pr ecisely if bright light enters in the vehicle.
- Raindrop or snow is on the sensor.
The distance from the vehicle ahead is not detected prec isely if raindrop or snow attaches on the sensor.
- A steep downhill The setting vehicle speed may exceed if Intelligent Cruise Control does not detect the vehicle ahead. The
brake may heat up in the vehicle- to-vehicle distance control mode.
- A repeated uphill and downhill Intelligent Cruise Control may not detect the vehicl e ahead precisely. An accident may occur by tailgating.
- Maintaining proper vehicle distance is difficult due to frequent acceleration/deceleration. It may cause any accident because the driving does not fit to the road condition if keeping a proper vehicle-
to-vehicle distance is difficult.
- When entering in the highway interchange (swerving off the main line),
Unexpected accident may cause if the vehicle ahead drives slower
than the preset vehicle speed. T he vehicle-to-vehicle distance con-
trol mode accelerates automatically because the vehicle ahead is
not detected on the lane if the own vehicle or the vehicle ahead
changes the lane.
• Intelligent Cruise Control does not activate to the parking vehicles, and vehicles driving extremely slow er than the own vehicle. Never
hit the vehicle stopping at a tollgate, or the tail end of traffic jam.
• Intelligent Cruise Control does not activate to the vehicle edging way, and non-vehicle objects (passengers etc.).
• This function detects the reflector of the vehicle ahead. Intelligent Cruise Control may not detect the vehicle
ahead, and keep a proper vehicle-to-vehicle distance in t he following conditions. Drive the vehicle according
to the driving condition.
- The vehicle ahead installs the reflector higher (trailer etc.).
- The rear of the vehicle ahead is extremely dirt.
- The vehicle ahead or vehicle on other lanes splashes water or snow on the road.
- The vehicle ahead provides dark exhaust gas. Smoke blocks the visibility.
- The vehicle ahead attaches film on the reflector. The v ehicle ahead does not install the reflector. The reflec-
tor is broken.
- Extremely heavy load is on the rear seat or in the cargo area.
- The vehicle drives on a repeated uphill and downhill
EL-2980D
Revision: March 2010 2008 QX56

CCS
NORMAL OPERATING CONDITIONCCS-67
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• The sensor detection distance is limited if the vehicle-to-vehicle distance is close. The vehicle distance may not maintain properly
because the motorcycle (A) driving on the lane edge is not
detected or detecting the vehicle ahead (cutting in the own vehicle)
delays.
• The sensor dirt is detected automat ically. But it is not perfect. Dirt
is not judged despite the sensor is dirt. Dirt is not detected if snow
or ice is on the sensor.
Keeping the vehicle-to-vehicle distance is difficult. Drive the vehi-
cle safely. Always clean the sensor.
Intelligent Cruise Control is released automatically if dirt is
detected.
• The vehicle ahead may not be detected temporarily, the vehicle or object on the neighboring lane may be
detected or the warning buzzer may sound according to the road shape (curve and narrow road) and the
own vehicle condition (steering, driving lane position, accident , malfunction etc.).
The vehicle ahead is not detected temporarily. The vehicle approaches too close.
PRECAUTIONS FOR CONVENTIONAL (F IXED SPEED) CRUISE CONTROL MODE
• Conventional cruise control mode does neither control the brake nor activate the warning.
Drive the vehicle safely. Keep a safe distance between vehicles by decreasing the vehicle speed according
to the driving condition etc.
• Never use the conventional cruise control mode in the following conditions.
- A well-trafficed road, and a tight turn. It may cause any accident because the driving does not fit to the road condition.
- A slippery road (e.g., freezing, or snowy road) The vehicle may lose the control by wheelspin.
- A steep downhill The engine brake does not activate effectively on a steep downhill. The preset vehicle speed may exceed.
JSOIA0050ZZ
Revision: March 2010 2008 QX56

CCS-68
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006218458
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
ICC System ServiceINFOID:0000000001731915
• Do not look straight into the laser beam discharger when adjusting laser beam aiming.
• Turn the MAIN switch OFF in conditions similar to dr iving, such as free rollers or a chassis dynamometer.
• Do not use the ICC sensor integrated unit removing from vehicle. Never disassemble and remodel.
• Erase DTC when replacing parts of ICC system, then c heck the operation of ICC system after adjusting laser
beam aiming if necessary.
Revision: March 2010 2008 QX56

CCS
PREPARATIONCCS-69
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000001806221
The actual shapes of Kent-Moore tools may differ fr om those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
KV99110100
(J-45718)
ICC target board Performing laser beam aiming ad-
justment
PKIA0358J
Revision: March 2010
2008 QX56

CCS-70
< ON-VEHICLE REPAIR >
ICC C/U
ON-VEHICLE REPAIR
ICC C/U
ICC UnitINFOID:0000000001673149
1. Rear inner side panel LH (shown with finisher removed) 2. ICC unit harness connector 3. ICC unit
⇐ Vehicle front
WKIA4607E
Revision: March 2010 2008 QX56