INFINITI QX56 2011 Factory Service Manual

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< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
SYMPTOM DIAGNOSIS
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Work FlowINFOID:0000000006367800
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the c onditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer comments. Refer to EXT-10, "
Diagnostic Worksheet". This information is necessary to duplicate the
conditions that exist when the noise occurs.
 The customer may not be able to provide a detailed description or the location of the noise. Attempt to obtain
all the facts and conditions that exist w hen the noise occurs (or does not occur).
 If there is more than one noise in the vehicle, perform a diagnosis and repair the noise that the customer is
concerned about. This can be accomplished by per forming a test drive with the customer.
 After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so that the customer, service advis er, and technician use the same language when describing
the noise.
 Squeak – (Like tennis shoes on a clean floor) Squeak characteristics include the light contact / fast movement / brought on by road conditions / hard sur-
faces = high-pitched noise / softer surfaces = low-pitched noises / edge to surface = chirping
 Creak – (Like walking on an old wooden floor) Creak characteristics include firm contact / slow movement/twisting with a rotational movement / pitch
dependent on materials / often brought on by activity.
 Rattle – (Like shaking a baby rattle) Rattle characteristics include fast repeated contact / vibr ation or similar movement / loose parts/missing clip
or fastener / incorrect clearance.
 Knock – (Like a knock on a door) Knock characteristics include hollow sounds / someti mes repeating / often brought on by driver action.
 Tick – (Like a clock second hand) Tick characteristics include gentle contacting of light materials / loose components / can be caused by driver
action or road conditions.
 Thump – (Heavy, muffled knock noise)
Thump characteristics include softer knock / dull sounds often brought on by activity.
 Buzz – (Like a bumblebee) Buzz characteristics include high frequency rattle / firm contact.
 Often the degree of acceptable noise level varies depending upon the person. A noise that a technician may
judge as acceptable may be very irritating to a customer.
 Weather conditions, especially humidity and temperat ure, may have a great effect on noise level.
DUPLICATE THE NOISE AND TEST DRIVE
SBT842
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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 lo cation of the noise. This information can be used to
duplicate the same conditions when the repair is reconfirmed.
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 items:
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, half-cl utch on M/T models, drive position on A/T models).
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, che ck ASIST for Technical Service Bulletins (TSBs) related
to the 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, and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 Removing the component(s) in the area that is / are suspected to be the cause of the noise.
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(s) that is / are suspected to be the cause of the noise.
Do not tap or push/pull the component(s) with excessive force, otherwise the noise is eliminated only tempo-
rarily.
 Feeling for a vibration by hand by touching the component(s ) that is / are suspected to be the cause of the
noise.
 Placing a piece of paper between components that are suspected to be the cause of the noise.
 Looking for loose components and contact marks. Refer to EXT-8, "
Inspection Procedure".
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 components, 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 the authorized NISSAN Parts
Department.
CAUTION:
Never use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISSA N 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 ×135 mm (3.937 ×5.315 in)
 76884-71L01: 60 ×85 mm (2.362 ×3.346 in)
 76884-71L02: 15 ×25 mm (0.591 ×0.984 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
 73982-9E000: 45 mm (1.772 in) thick, 50 ×50 mm (1.969 ×1.969 in)
 73982-50Y00: 10 mm (0.394 in) thick, 50 ×50 mm (1.969 ×1.969 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.181 in) thick, 30 ×50 mm (1.181 ×1.969in)
FELT CLOTHTAPE
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SQUEAK AND RATTLE TROUBLE DIAGNOSES
Used to insulate where movement does not occur. Ideal for instrument panel applications.
 68370-4B000: 15 ×25 mm (0.591 ×0.984 in) pad
 68239-13E00: 5 mm (0.197 in) wide tape roll
The following materials, not found in the kit, can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Insulates where slight movement is present. Ideal for instrument panel applications.
SILICONE GREASE
Used in place of UHMW tape that is visible or does not fit. Only lasts a few months.
SILICONE SPRAY
Used when grease cannot be applied.
DUCT TAPE
Used to eliminate movement.
CONFIRM THE REPAIR
After repair is complete, test drive the vehicle to confir m that the cause of noise is repaired by test driving the
vehicle. Operate the vehicle under the same conditions as when the noise originally occurred. Refer to the
notes on the Diagnostic Worksheet.
Inspection ProcedureINFOID:0000000006367801
Refer to Table of Contents for specific component removal and installation information.
INSTRUMENT PANEL
Most incidents are caused by contact and movement between:
1. The cluster lid A and instrument panel
2. Acrylic lens and combination meter housing
3. Instrument panel to front pillar garnish
4. Instrument panel to windshield
5. Instrument panel mounting pins
6. Wiring harnesses behind the combination meter
7. A/C defroster duct and duct joint
These incidents can usually be located by tapping or moving the components to duplicate the noise or by
pressing on the components while driving to stop the noise. Most of these incidents can be repaired by
applying felt cloth tape or silicon spray (in hard to reach areas). Urethane pads can be used to insulate
wiring harness.
CAUTION:
Never use silicone spray to isolate a squeak or ra ttle. If the area is saturated with silicone, the
recheck of repair becomes impossible.
CENTER CONSOLE
Components to check include:
1. Shifter assembly cover to finisher
2. A/C control unit and cluster lid C
3. Wiring harnesses behind audio and A/C control unit
The instrument panel repair and isolation pr ocedures also apply to the center console.
DOORS
Check the following items:
1. Finisher and inner panel making a slapping noise
2. Inside handle escutcheon connection to door finisher
3. Wiring harnesses tapping
4. Door striker out of alignment causing a popping noise on starts and stops
Tapping, moving the components, or pressing on them wh ile driving to duplicate the conditions can isolate
many of these incidents. The areas can usually be insula ted 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 customer.
In addition check for the following items:
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1. Trunk lid dumpers out of adjustment
2. Trunk lid striker out of adjustment
3. Trunk lid torsion bars knocking together
4. A loose license plate or bracket
Most of these incidents can be repaired by adjusting, se curing, or insulating the item(s) or component(s) caus-
ing the noise.
SUNROOF/HEADLINING
Noises in the sunroof / headlining area can of ten be traced to one of the following items:
1. Sunroof lid, rail, linkage, or seals making a rattle or light knocking noise
2. Sunvisor shaft shaking in the holder
3. Front or rear windshield touching headlining 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.
SEATS
When isolating seat noise it is important to note the position the seat is in and the load placed on the seat
when the noise occurs. These conditions should be duplic ated when verifying and isolating the cause of the
noise.
Causes of seat noise include:
1. Headrest rods and holder
2. A squeak between the seat pad cushion and frame
3. The rear seatback 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 thes e 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 c an usually be made by moving, adjusting, securing, or
insulating the component causing the noise.
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SQUEAK AND RATTLE TROUBLE DIAGNOSES
Diagnostic Worksheet
INFOID:0000000006367802
PIIB8741E
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PIIB8742E
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< REMOVAL AND INSTALLATION >
FRONT BUMPER
REMOVAL AND INSTALLATION
FRONT BUMPER
Exploded ViewINFOID:0000000006367597
JMKIA5429GB
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Removal and InstallationINFOID:0000000006367598
REMOVAL
CAUTION:
Bumper fascia is made of resin. Never apply strong force to it, and be careful to prevent contact with
oil.
1. Fully open hood assembly.
2. Remove front grille. Refer to EXT-19, "
Removal and Installation".
3. Remove bumper molding. 1. Remove front fender drip cover. Refer to DLK-223, "
FRONT FENDER DRIP COVER : Removal and
Installation".
2. Remove bumper molding upper fixing screws (A) (LH and
RH).
3. Remove bumper molding fixing clips (A).
1. Bumper molding bracket LH 2. Energy absorber LH 3. Rivet
4. Bumper molding 5. Grommet 6. Bumper molding bracket RH
7. Energy absorber RH 8. Bumper fascia assembly 9. Front fog lamp RH
10. Front fog lamp finisher RH 11. Front grille lower molding 12. Front bumper grille (with ICC)
13. Front bumper grille (without ICC) 14. License plate bracket 15. Front fog lamp finisher LH
16. Front fog lamp LH 17. U nut 18. Bumper retainer bracket LH
19. Bumper retainer 20. Bumper side bracket LH 21. Grommet
22. Bumper side bracket RH 23. Grommet 24. Bumper molding stay RH
25. Bumper retainer bracket RH 26. Bumper retainer bracket CTR 27. Bumper molding stay LH
28. double-sided tape [t: 0.13 mm (0.005 in)]
: Pawl
: Metal clip
: Vehicle front
JMKIA5426ZZ
JMKIA5427ZZ
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FRONT BUMPER
4. Pull bumper molding (1) toward the direction shown in thefigure, and then disengage bumper molding fixing metal
clips (LH and RH).
5. Remove bumper molding.
4. Remove front over fender front side. Refer to EXT-26, "
Removal and Installation".
5. Remove clips of bumper upper side.
6. Remove bumper fascia assembly fixing screws (A) (LH and RH).
7. Pull bumper fascia assembly toward the vehicle outside as shown by the arrow in the figure, and then disengage the
bumper fascia assembly from bumper side brackets (LH and
RH).
8. Disconnect corner sensor harness c onnector and fog lamp harness connector.
9. Remove bumper fascia assembly. CAUTION:
When removing bumper fascia assembly, 2 workers are required so as to prevent it from dropping.
10. Remove the following parts after removing bumper fascia assembly.  Front grille lower molding.
 Front bumper grille.
 Sonar sensor (LH and RH). Refer to AV-239, "
Removal and Installation".
 Front fog lamp assembly (LH and RH). Refer to EXL-128, "
Removal and Installation" .
 Front fog lamp finishers (LH and RH)
 Bumper side bracket (LH and RH)
 License plate bracket
11. Remove bumper upper retainer.
INSTALLATION
Note the following item, and then install in the reverse order of removal.
NOTE:
: Metal clip
JMKIA5428ZZ
JMKIA5430ZZ
: Pawl
JMKIA5431ZZ
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 The following table shows the specified values for checking normal installation status.
 Fitting adjustment cannot be performed.
JMKIA5454ZZ
Portion Clearance Surf ace height difference
Front grille –
Hood A – A3.7 – 8.3 mm
(0.146 – 0.327 in) (-0.9) – (+3.9) mm
[(-0.035) – (+0.154) in]
Bumper fascia assembly –
Front bumper molding B – B0.1 – 3.4 mm
(0.004 – 0.134 in) (-1.9) – (+1.9) mm
[(-0.075) – (+0.075) in]
Front bumper molding –
Headlamp C – C0.1 – 2.5 mm
(0.004 – 0.098 in) —
Front bumper molding –
Hood D – D1.2 – 5.8 mm
(0.047 – 0.228 in) (-2.4) – (+2.4) mm
[(-0.094) – (+0.094)]
Front bumper molding–
Headlamp E – E0.1 – 2.5 mm
(0.004 – 0.098 in) —
Bumper fascia assembly –
Headlamp F – F0.2 – 3.1 mm
(0.008 – 0.122 in) 0.5 – 3.5 mm
(0.020 – 0.138 in)
Front fender –
Front bumper molding G – G0.0 – 0.7 mm
(0.000 – 0.028 in) (-1.0) – (+1.0) mm
[(-0.039) – (+0.039) in]
Front fender –
Bumper fascia assembly H – H0.0 – 0.8 mm
(0.000 – 0.031 in) (-0.7) – (+1.3) mm
[(-0.028) – (+0.051) in]
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