engine INFINITI QX56 2006 Factory Service Manual

PREPARATIONIP-3
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Revision: November 2009 2006 QX56
PREPARATIONPFP:00002
Special Service ToolsEIS004WX
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEIS004WY
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-39570)
Chassis ear Locating the noise
—
(J-43980)
NISSAN Squeak and Rattle kit Repairing the cause of noise
SBT839
SBT840
Tool name
(Kent-Moore No.)
Description
Engine ear
(J-39565) Locating the noise
Power Tool Loosening bolts and nuts
SIIA0995E
PBIC0191E

SQUEAK AND RATTLE TROUBLE DIAGNOSISIP-5
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DUPLICATE THE NOISE AND TEST DRIVE
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1. Close a door.
2. Tap or push/pull around the area where the noise appears to be coming from.
3. Rev the engine.
4. Use a floor jack to recreate vehicle “twist”.
5. At idle, apply engine load (electrical load, drive position on A/T model).
6. Raise the vehicle on a hoist and hit a tire with a rubber hammer.

Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.

If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool (Chassis Ear: J-39570, Engine Ear: J-39565 and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:

Removing the components in the area that you suspect the noise is coming from.
Do not use too much force when removing clips and fasteners, otherwise clips and fasteners
can be broken or lost during the repair, resulting in the creation of new noise.

Tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be elimi-
nated only temporarily.

Feeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing
the noise.

Placing a piece of paper between components that you suspect are causing the noise.

Looking for loose components and contact marks.
Refer to IP-6, "
Generic Squeak and Rattle Troubleshooting" .
REPAIR THE CAUSE

If the cause is a loose component, tighten the component securely.

If the cause is insufficient clearance between components:
–Separate components by repositioning or loosening and retightening the component, if possible.
–Insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape. A NISSAN Squeak and Rattle Kit (J-43980) is available through your authorized NISSAN
Parts Department.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISSAN Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 x 135 mm (3.94 x 5.31 in)/76884-71L01: 60 x 85 mm (2.36 x 3.35 in)/76884-71L02: 15 x 25
mm (0.59 x 0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.

SQUEAK AND RATTLE TROUBLE DIAGNOSISIP-7
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Tapping or moving the components or pressing on them while driving to duplicate the conditions can isolate
many of these incidents. You can usually insulate the areas with felt cloth tape or insulator foam blocks from
the NISSAN Squeak and Rattle Kit (J-43980) to repair the noise.
TRUNK
Trunk noises are often caused by a loose jack or loose items put into the trunk by the owner.
In addition look for:
1. Trunk lid bumpers out of adjustment
2. Trunk lid striker out of adjustment
3. The trunk lid torsion bars knocking together
4. A loose license plate or bracket
Most of these incidents can be repaired by adjusting, securing or insulating the item(s) or component(s) caus-
ing the noise.
SUNROOF/HEADLINING
Noises in the sunroof/headlining area can often be traced to one of the following:
1. Sunroof lid, rail, linkage or seals making a rattle or light knocking noise
2. Sun visor shaft shaking in the holder
3. Front or rear windshield touching headliner and squeaking
Again, pressing on the components to stop the noise while duplicating the conditions can isolate most of these
incidents. Repairs usually consist of insulating with felt cloth tape.
OVERHEAD CONSOLE (FRONT AND REAR)
Overhead console noises are often caused by the console panel clips not being engaged correctly. Most of
these incidents are repaired by pushing up on the console at the clip locations until the clips engage.
In addition look for:
1. Loose harness or harness connectors.
2. Front console map/reading lamp lens loose.
3. Loose screws at console attachment points.
SEATS
When isolating seat noise it's important to note the position the seat is in and the load placed on the seat when
the noise is present. These conditions should be duplicated when verifying and isolating the cause of the
noise.
Cause of seat noise include:
1. Headrest rods and holder
2. A squeak between the seat pad cushion and frame
3. The rearseat back lock and bracket
These noises can be isolated by moving or pressing on the suspected components while duplicating the con-
ditions under which the noise occurs. Most of these incidents can be repaired by repositioning the component
or applying urethane tape to the contact area.
UNDERHOOD
Some interior noise may be caused by components under the hood or on the engine wall. The noise is then
transmitted into the passenger compartment.
Causes of transmitted underhood noise include:
1. Any component mounted to the engine wall
2. Components that pass through the engine wall
3. Engine wall mounts and connectors
4. Loose radiator mounting pins
5. Hood bumpers out of adjustment
6. Hood striker out of adjustment
These noises can be difficult to isolate since they cannot be reached from the interior of the vehicle. The best
method is to secure, move or insulate one component at a time and test drive the vehicle. Also, engine RPM
or load can be changed to isolate the noise. Repairs can usually be made by moving, adjusting, securing, or
insulating the component causing the noise.

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TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of unit names listed on the column of diagnosis system selec-
tion screen of a check sheet table are not displayed on “SELECT SYSTEM” screen attached to the check
sheet.
NOTE:
Put a check mark to “No indication” of AUTO DRIVE POS. because AUTO DRIVE POS. is not displayed
on “SELECT SYSTEM ” screen.
2. Confirm the unit name that “UNKWN” is displayed from the copy of “CAN DIAG SUPPORT MNTR” screen
of “ENGINE ” attached to the check sheet, and then put a check mark to the check sheet table.
NOTE:
In “CAN DIAG SUPPORT MNTR ” screen, “UNKWN” is displayed on “VDC/TCS/ABS”, “METER/M&A ”,
“BCM/SEC ” and “IPDM E/R ”. Put a check mark to it.
3. Confirm the unit name that “UNKWN” is displayed on the copy of “CAN DIAG SUPPORT MNTR ” screen
of “A/T ” as well as “ENGINE”. And then, put a check mark to the check sheet table.
NOTE:

For “A/T ”, “UNKWN ” is displayed on “VDC/TCS/ABS”, “METER/M&A ”, “ICC/e4WD ” and “AWD/4WD ”.
But put a check mark to “VDC/TCS/ABS” and “METER/M&A ” because “UNKWN ” is listed on the col-
umn of reception diagnosis of the check sheet table.
PKIC4972E

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5. Confirm the unit name that “UNKWN” is displayed on the copy of “CAN DIAG SUPPORT MNTR ” screen
of “BCM ”, “HVAC”, “ABS” and “IPDM E/R ” as well as “ENGINE”. And then, put a check mark to the check
sheet table.
NOTE:

For “BCM ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.

For “HVAC ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.

For “ABS”, “UNKWN ” is displayed on “ECM”, “TCM ”, “METER/M&A ”, “ICC ” and “AWD/4WD ”. But put a
check mark to “ECM” and “TCM” because “UNKWN” is listed on the column of reception diagnosis of
the check sheet table.

For “IPDM E/R ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.
CAUTION:
“ALL MODE AWD/4WD” puts a check mark on the check
sheet when “Present” is “UNKWN” and “Past” is “0”.
PKIC3659E
SKIB3244E

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Example of Filling in Check Sheet When Initial Conditions Are Not Reproduced
1. See “SELF-DIAG RESULTS ” of all units attached to the check sheet. If “CAN COMM CIRCUIT” or “CAN
COMM CIRCUIT [U1000] ” is displayed, put a check mark to the applicable column of self-diagnostic
results of the check sheet table.
NOTE:

For “ENGINE ”, “CAN COMM CIRCUIT [U1001] ” is displayed. Put a check mark to it.

For “A/T”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.

For “AUTO DRIVE POS.”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.

For “BCM”, “NO DTC IS DETECTED ” is displayed. Do not put a check mark to it.

For “HVAC”, “NO DTC IS DETECTED ” is displayed. Do not put a check mark to it.

For “ABS”, “CAN COMM CIRCUIT [U1000]” is displayed. Put a check mark to it.

For “IPDM E/R ”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.
PKIC3661E

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CAN Diagnostic Support MonitorUKS004SU
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ECM
Display Results (Present)

OK: Normal

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.
Display Results (Past)

OK: Normal

0: There is malfunction now.

1 ~ 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0 →1→ 2...38→ 39 after returning to the
normal condition whenever IGN OFF →ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0
when malfunction is detected again in the process.

– : Undiagnosed
PKIC3562E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
PresentPast
ENGINE TRANSMIT DIAG Make sure of normal transmission.
OK/UNKWN/–
OK/0/1~39/–
VDC/TCS/ABS
Make sure of normal reception from ABS
actuator and electric unit (control unit). OK/UNKWN/
–
METER/M&A Make sure of normal reception from combina-
tion meter. OK/UNKWN/
–
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN/ –
ICC Make sure of normal reception from ICC unit. OK/UNKWN/ –
HVAC HVAC is not diagnosed. –
TCM Make sure of normal reception from TCM. OK/UNKWN/ –
EPS EPS is not diagnosed. –
IPDM E/R Make sure of normal reception from IPDM E/
R. OK/UNKWN/
–
e4WD e4WD is not diagnosed. –
AWD/4WD Make sure of normal reception from transfer
control unit. OK/UNKWN/
–

CAN COMMUNICATIONLAN-31
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CAN Communication UnitUKS000NV
Go to CAN system, when selecting your CAN system type from the following table.
×: Applicable
NOTE:
Vehicles equipped with ICC can be identified by the presence of a ICC switch.
TYPE1/TYPE2
System diagram

Ty pe 1
Body type Wagon
Axle 2WD 4WD
Engine VK56DE
Transmission A/T
Brake control VDC
ICC system ××
CAN system type 1234
CAN system trouble diagnosis LAN-39
LAN-57LAN-79LAN-98
BKIA0191E
PKIC2711E

LAN-32
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CAN COMMUNICATION
Revision: November 20092006 QX56

Ty p e 2
Input/output signal chart
T: Transmit R: Receive
PKIC3015E
SignalsECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
ABS actuator and electric unit (control unit) IPDM E/R
A/C compressor request signal T R
Accelerator pedal position signal T RR R
ASCD CRUISE lamp signal TR
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal TR
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal T R
Engine coolant temperature signal TRR
Engine speed signal T RRR R R R
Engine status signal TR
Fuel consumption monitor signal TR
TR
ICC steering switch signal TR
Malfunction indicator lamp signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal TR

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CAN COMMUNICATION
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ASCD CRUISE lamp signalTR
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal TR
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal T R
Engine coolant temperature signal TRR
Engine speed signal T RRR R R R R
Engine status signal TR
Fuel consumption monitor signal TR
TR
ICC steering switch signal TR
Malfunction indicator lamp signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal TR
A/T fluid temperature sensor signal TR
A/T position indicator lamp signal TR R R
A/T self-diagnosis signal R T
Current gear position signal TR R
Output shaft revolution signal R TR R
P range signal TR R R
Turbine revolution signal R TR
ICC sensor signal T R
Buzzer output signal TR
RT
ICC OD cancel request signal R RT
ICC operation signal R RT
ICC system display signal TR
System setting signal TR
RT
1st position switch signal RT
4th position switch signal RT
Distance to empty signal T R
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R