air condition INFINITI QX56 2006 Factory Service Manual

GI-30
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: November 20092006 QX56
UNDER SEATING AREAS
An unclamped or loose harness can cause wiring to be pinched by seat components (such as slide guides)
during vehicle vibration. If the wiring runs under seating areas, inspect wire routing for possible damage or
pinching.
Heat Sensitive
The customer's concern may occur during hot weather or after car
has sat for a short time. In such cases you will want to check for a
heat sensitive condition.
To determine if an electrical component is heat sensitive, heat the
component with a heat gun or equivalent.
Do not heat components above 60°C (140 °F). If incident occurs
while heating the unit, either replace or properly insulate the compo-
nent.
Freezing
The customer may indicate the incident goes away after the car
warms up (winter time). The cause could be related to water freezing
somewhere in the wiring/electrical system.
There are two methods to check for this. The first is to arrange for
the owner to leave his car overnight. Make sure it will get cold
enough to demonstrate his complaint. Leave the car parked outside
overnight. In the morning, do a quick and thorough diagnosis of
those electrical components which could be affected.
The second method is to put the suspect component into a freezer
long enough for any water to freeze. Reinstall the part into the car
and check for the reoccurrence of the incident. If it occurs, repair or
replace the component.
Water Intrusion
The incident may occur only during high humidity or in rainy/snowy
weather. In such cases the incident could be caused by water intru-
sion on an electrical part. This can be simulated by soaking the car
or running it through a car wash.
Do not spray water directly on any electrical components.
Electrical Load
The incident may be electrical load sensitive. Perform diagnosis with
all accessories (including A/C, rear window defogger, radio, fog
lamps) turned on.
SGI842
SGI843
SGI844
SGI845

GI-38
CONSULT-II CHECKING SYSTEM
Revision: November 20092006 QX56
CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionEAS001FP

CONSULT-II is a hand-held type tester. When it is connected with a diagnostic connector equipped on the
vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various
kinds of diagnostic tests.

Refer to “CONSULT-II Software Operation Manual ” for more information.
Function and System ApplicationEAS001TO
Diagnostic test
mode Function
ENGINE
A/T
ICC
ABS
AIR BAG
IPDM E/R BCM
AUTO DRIVE POS.
REARVIEW CAMERA
AIR LEVELIZER
ALL MODE AWD/4WD HVAC
NVIS (NATS)
*1
NVIS (NATS BCM OR S/ENT)
*1
Work support This mode enables a technician to adjust some
devices faster and more accurately by following the
indications on CONSULT-II. x - xx - - xxxxx - - -
Self-diagnostic Self-diagnostic can be performed quickly. ----x---------
Self-diagnos-
tic results Self-diagnostic results can be read and erased
quickly.
xxxx - xxx - xxxxx
Trouble diag-
nostic record Current self-diagnostic results and all trouble diagnos-
tic records previously stored can be read.
--- - x---------
Data monitor Input/Output data in the ECM can be read. xxxx - x - xxxxx - -
Data monitor
(spec) Data monitor specification can be read.
x-------------
CAN diagno-
sis support
monitor The communication condition of CAN communication
line can be read.
xxxx - xxx - - xx - -
Active test Diagnostic Test Mode in which CONSULT-II drives
some actuators apart from the ECMs and also shifts
some parameters in a specified range.
x-xx-x-x-x----
Function test This mode can show results of self-diagnosis of ECU
with either “
OK” or “NG ”. For engines, more practical
tests regarding sensors/switches and/or actuators are
available. xx-xx- --- -----
DTC & SRT
confirmation The results of SRT (System Readiness Test) and the
self-diagnosis status/result can be confirmed.
x-------------
DTC work sup-
port The operating condition to confirm Diagnosis Trouble
Codes can be selected.
xx------------
ECM/ECU part
number ECM/ECU part number can be read.
x x x x - - x x x x x x - -
ECU discrimi-
nated No. Classification number of a replacement ECU can be
read to prevent an incorrect ECU from being installed.
----x---------
Passenger air
bag Displays the STATUS (readiness) of the front passen-
ger airbag.
----x---------
Configuration Sets control module parameters to match vehicle
options. ------x-------
PIN read
*2This mode shows the BCM-specific 5-digit code. -------------x
Control unit
initialization
*2All registered ignition key IDs in NATS components
can be initialized and new IDs can be registered. ------------x-

SQUEAK AND RATTLE TROUBLE DIAGNOSESGW-5
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SQUEAK AND RATTLE TROUBLE DIAGNOSESPFP:00000
Work FlowEIS004TN
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions 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's comments; refer to GW-9, "
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 when the noise occurs (or does not occur).

If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer
is concerned about. This can be accomplished by test driving the vehicle with the customer.

After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining 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 = higher pitch noise/softer surfaces = lower pitch 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 the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.

Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes 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/dead sound often brought on by activity.

Buzz —(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.

Often the degree of acceptable noise level will vary depending upon the person. A noise that you may
judge as acceptable may be very irritating to the customer.

Weather conditions, especially humidity and temperature, may have a great effect on noise level.
SBT842

GW-6
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Revision: November 20092006 QX56
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, half-clutch on M/T model, 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 mechanic's 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 bro-
ken 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 eliminated 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 GW-7, "
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× 135 mm (3.94×5.31 in)/76884-71L01: 60 ×85 mm (2.36× 3.35 in)/76884-71L02: 15× 25
mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 ×50 mm (1.97 ×1.97 in)/73982-50Y00: 10 mm (0.39 in) thick,
50 ×50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)

SQUEAK AND RATTLE TROUBLE DIAGNOSESGW-7
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80845-71L00: 30 mm (1.18 in) thick, 30×50 mm (1.18 ×1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.
68370-4B000: 15× 25 mm (0.59×0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll. The following mate-
rials 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 instead of UHMW tape that will be visible or not fit.
Note: Will only last a few months.
SILICONE SPRAY
Use when grease cannot be applied.
DUCT TAPE
Use to eliminate movement.
CONFIRM THE REPAIR
Confirm that the cause of a 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.
Generic Squeak and Rattle TroubleshootingEIS004TO
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 apply-
ing felt cloth tape or silicone spray (in hard to reach areas). Urethane pads can be used to insulate wiring har-
ness.
CAUTION:
Do not use silicone spray to isolate a squeak or rattle. If you saturate the area with silicone, you will
not be able to recheck the repair.
CENTER CONSOLE
Components to pay attention to 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 procedures also apply to the center console.
DOORS
Pay attention to the:
1. Finisher and inner panel making a slapping noise
2. Inside handle escutcheon to door finisher
3. Wiring harnesses tapping
4. Door striker out of alignment causing a popping noise on starts and stops
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.

GW-8
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Revision: November 20092006 QX56
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/HEADLINER
Noises in the sunroof/headliner 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 lense 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 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 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.

POWER WINDOW SYSTEMGW-35
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Trouble Diagnoses Symptom ChartEIS005XX

Check that other systems using the signal of the following systems operate normally.
DOOR SW-DRIndicates (ON/OFF) condition of front door switch driver side
DOOR SW-AS Indicates (ON/OFF) condition of front door switch passenger side
Symptom Repair orderRefer to page
None of the power windows can be operated using any switch 1. BCM power supply and ground circuit check
GW-37
2. Main power window and door lock/unlock
power supply and ground circuit checkGW-38
3. Power window serial link check front LH and
RHGW-39
Front power window LH alone does not operate 1. Main power window and door lock/unlock
power supply and ground circuit check
GW-382. Front power window motor LH circuit check
GW-40
3. Replace main power window and door lock/
unlock switch EI-32
Front power window RH alone does not operate 1. Power window and door lock/unlock switch
RH power supply and ground circuit check
GW-392. Power window serial link check front LH and
RHGW-51
3. Front power window motor RH circuit check
GW-41
4. Replace BCMBCS-20
Rear power window LH alone does not operate 1. Rear power window control unit LH or RH
power supply and ground circuit check
GW-53
2. Rear power window switch LH or RH power
supply and ground circuit checkGW-54
3. Rear power window motor LH circuit check
GW-54
4. Power window serial link check rear LH and
RHGW-59
5. Replace BCM
BCS-20
Rear power window RH alone does not operate 1. Rear power window control unit LH or RH
power supply and ground circuit check
GW-53
2. Rear power window switch LH or RH power
supply and ground circuit checkGW-54
3. Rear power window motor RH circuit check
GW-55
4. Power window serial link check rear LH and
RHGW-59
5. Replace BCM
BCS-20
Rear power vent windows do not operate 1. Rear power vent window switch circuit checkGW-61
Rear power vent window LH alone does not operate 1. Rear power vent window motor LH circuit
checkGW-61
Rear power vent window RH alone does not operate
1. Rear power vent window motor RH circuit
checkGW-61
Rear power vent windows do not open 1. Rear power vent window relay (OPEN)
check
GW-61
Rear power vent windows do not close 1. Rear power vent window relay (CLOSE)
checkGW-61

POWER WINDOW SYSTEMGW-37
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BCM Power Supply and Ground Circuit CheckEIS005XY
1. CHECK FUSE AND FUSIBLE LINK

Check 10A fuse (No. 4, located in the fuse block (J/B)]

Check 10A fuse (No. 59, located in the fuse and relay box)

Check 50A fusible link (letter f , located in the fuse and fusible link box)
NOTE:
Refer to GW-15, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
3, "PRECAUTIONS" .
2. CHECK BCM POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace the harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
Connector Terminals
Power
source Condition Voltage (V)
(Approx.)
(+) (-)
M20 70 Ground Battery
power
supply Ignition
switch
OFF Battery voltage
M18 38 Ground
Ignition
power
supply Ignition
switch
ON or
START Battery voltage
11 Ground ACC
power
supply Ignition
switch
ACC or ON Battery voltage
LIIA0995E
67 - Ground
: Continuity should exist.
LIIA0915E

POWER WINDOW SYSTEMGW-39
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4. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M20 terminals 68, 69 and ground.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace BCM.
Power Window and Door Lock/Unlock Switch RH Power Supply and Ground
Circuit Check
EIS005Y0
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between power window and door lock/unlock switch RH connector D105 terminal 10 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power window and door lock/unlock switch RH.
3. Check continuity between power window and door lock/unlock switch RH connector D105 terminal 11 and ground.
OK or NG
OK >> Power supply and ground circuit are OK.
NG >> Repair or replace harness.
3. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check continuity between BCM connector M20 (A) terminal 69 and power window and door lock/unlock switch RH connector
D105 (B) terminal 10.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness. 68 - Ground
: Battery voltage
69 - Ground : Battery voltage
LIIA0917E
10 - Ground : Battery voltage
LIIA1257E
11 - Ground: Continuity should exist.
LIIA1258E
69 - 10 : Continuity should exist.
LIIA2298E

GW-40
POWER WINDOW SYSTEM
Revision: November 20092006 QX56
4. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M20 terminal 69 and ground.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
Front Power Window Motor LH Circuit CheckEIS005Y1
1. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/ unlock switch connector D7 terminals 8, 11 and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace main power window and door lock/unlock switch. Refer to EI-32, "
REMOVAL" .
2. CHECK POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and front power window motor LH.
3. Check continuity between main power window and door lock/ unlock switch connector D7 terminals 8, 11 and front power win-
dow motor LH connector D9 terminals 1, 2.
OK or NG
OK >> Replace front power window motor LH.
NG >> Repair or replace harness. Refer to GW-66, "
FRONT DOOR GLASS REGULATOR" .
69 - Ground
: Battery voltage
WIIA0508E
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
D7 8
Ground UP Battery voltage
DOWN 0
11 UP
0
DOWN Battery voltage
LIIA0317E
8 - 2 : Continuity should exist.
11 - 1 : Continuity should exist.
LIIA1260E