2008 INFINITI QX56 sensor

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
< SYMPTOM DIAGNOSIS >
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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
ICC SENSOR INTEGRATED UNITCCS-71
< ON-VEHICLE REPAIR >
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ICC SENSOR INTEGRATED UNIT
ICC SensorINFOID:0000000001673150
CAUTION:
Perform the laser beam aiming procedure every time the ICC sensor is removed or installed. Refer to
CCS-5
.
1. ICC sensor bracket 2. ICC frame bracket3. ICC sensor
4. Frame side rail ⇐Vehicle front
WKIA4608E
Revision: March 2010 2008 QX56

CHG-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004857596
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.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004857595
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

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PRECAUTIONSCHG-3
< PRECAUTION >
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5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Precaution for Power Generation Variable Voltage Control SystemINFOID:0000000001538880
CAUTION:
For this model, the battery current sensor that is installed to the negative battery cable measures the
charging/discharging current of the battery and performs various engine controls. If an electrical com-
ponent is connected directly to the negative battery terminal, the current flowing through that compo-
nent will not be measured by the battery current sensor. This condition may cause a malfunction of
the engine control system and battery discharge m ay occur. Do not connect an electrical component
or ground wire directly to the battery terminal.
Revision: March 2010 2008 QX56