2004 INFINITI QX56 ECU

WINDSHIELD GLASS
GW-11
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Revision: August 20072004 QX56
WINDSHIELD GLASSPFP:72712
Removal and InstallationEIS002UL
REMOVAL
1. Remove inside mirror. Refer to GW-77, "Removal and Installation" .
2. Partially remove the headlining (front edge). Refer to EI-37, "
HEADLINING" .
3. Remove cowl top cover. Refer to EI-18, "
Removal and Installation" .
4. Apply a protective tape around the windshield glass to protect the painted surface from damage.

Remove glass using piano wire or power cutting tool and an inflatable pump bag.

If a windshield glass is to be reused, mark the body and the glass with mating marks.
WA RN ING:
When cutting the glass from the vehicle, always wear safety glasses and heavy gloves to help prevent
glass splinters from entering your eyes or cutting your hands.
CAUTION:

When a windshield glass is to be reused, do not use a cutting knife or power cutting tool.

Be careful not to scratch the glass when removing.

Do not set or stand glass on its edge. Small chips may develop into cracks.
INSTALLATION

Use a genuine NISSAN Urethane Adhesive Kit (if available) or equivalent and follow the instructions fur-
nished with it.

While the urethane adhesive is curing, open a door window. This will prevent the glass from being forced
out by passenger compartment air pressure when a door is closed.

The molding must be installed securely so that it is in position and leaves no gap.
LIIA0652E
PIIA0186E

POWER WINDOW SYSTEM
GW-33
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Revision: August 20072004 QX56
Work FlowEIS002UU
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-15, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction.
Refer to GW-36, "
Trouble Diagnoses Symptom Chart" .
4. Does power window system operate normally? Yes, GO TO 5, If No, GO TO 3.
5. INSPECTION END.
CONSULT-II Function (BCM)EIS002UV
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
2. Turn ignition switch ON.
3. Touch “START (NISSAN BASED VHCL)”.
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORT Changes setting of each function.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E

GW-54
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
Power Window Serial Link Check Front LH and RHEIS002V8
1. CHECK SERIAL LINK OUTPUT SIGNAL
With CONSULT-II
Check door lock and unlock switch (“LOCK SW DR/AS”, “UNLK SW DR/AS”) in DATA MONITOR mode for
“MULTI REMOTE ENT” with CONSULT-II. Refer to GW-34, "
DATA MONITOR" .

When door lock and unlock switch is turned to LOCK

When door lock and unlock switch is turned to UNLOCK
Without CONSULT-II
1. Remove key from ignition switch, and the door of driver side and passenger side is closed.
2. Check the signal between BCM connector and ground with oscilloscope when door lock and unlock
switch (front LH and front RH) is turned “LOCK” or “UNLOCK”.
3. Make sure signals which are shown in the figure below can be
detected during 10 second just after door lock and unlock switch
(front LH and front RH) is turned “LOCK” or “UNLOCK”.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK BCM OUTPUT SIGNAL
Check power window serial link (“POWER WINDOW DOWN”) in “ACTIVE TEST” mode with CONSULT-II.
Refer to GW-34, "
ACTIVE TEST" .
When “ACTIVE TEST” is executed, is the window of driver side and
passenger side lowered?
YES or NO
YES >> Further inspection is necessary. Refer to GW-36, "Tro u-
ble Diagnoses Symptom Chart" .
NO >> Replace BCM.LOCK SW DR/AS : ON
UNLK SW DR/AS : ON
LIIA0172E
ConnectorTerminals (Wire color)
Signal
(+) ( – )
M18 22 (W/V) Ground
LIIA0391E
PIIA2344E
PIIA3080E

GW-70
FRONT DOOR GLASS AND REGULATOR
Revision: August 20072004 QX56
FRONT DOOR GLASS REGULATOR
Removal
1. Remove the front door speaker. Refer to AV- 4 5 , "Removal and Installation of Front Door Speaker" .
2. Remove the hole cover over rear door glass bolt.
3. Temporarily reconnect the power window switch to the door harness.
4. Operate the power window main switch to raise/lower the door glass until the door glass bolts can be
seen.
5. Remove the inside seal.
6. Remove the door glass bolts.
7. Raise the front door glass and hold it in place with suitable tool
(A).
8. Disconnect the harness connector from the regulator assembly.
9. Remove the bolts and the regulator assembly.
Inspection After Removal
Check the regulator assembly for the following items. If a malfunc-
tion is detected, replace or grease it.

Wire wear

Regulator deformation

Grease condition for each sliding part
The arrows in the figure show the application points of the body
grease.
Disassembly
Remove the regulator motor from the regulator assembly.
Installation
1. Install the regulator assembly. Refer to GW-69, "Removal and Installation" .
2. Connect the harness connector to the regulator assembly.
3. Align the door glass and install the door glass bolts.
4. Reset the limit switch. Refer to GW-71, "
Setting of Limit Switch" .
5. Install front door speaker. Refer to AV- 4 5 , "
Removal and Installation of Front Door Speaker" .
FITTING INSPECTION AND SETTING AFTER INSTALLATION
Fitting

Check that the door glass is securely fit into the door glass run groove.

Lower the door glass slightly [approximately 10 to 20 mm (0.39 to 0.79 in)] and check that the clearance to
the sash is parallel. If the clearance between the glass and sash is not parallel, loosen the regulator bolts,
guide rail bolts, and door glass and guide rail bolts to correct the door glass position.
WIIA0767E
LIIA0670E
Door glass bolts : 6.1 N·m (0.62 kg-m, 54 in-lb)

GW-74
REAR DOOR GLASS AND REGULATOR
Revision: August 20072004 QX56
Inspection after removal
Check the regulator assembly for the following items. If a malfunction is detected, replace or grease it.

Gear wear

Regulator deformation

Spring damage

Grease condition for each sliding part
Installation
1. Connect the harness connector to the regulator assembly and
install the regulator and guide channel.
2. Install the door glass from outside to ensure that it is in both the
front and rear glass channels. Tighten door glass bolts to the
specified torque.
3. Install the inside seal.
4. Install the rear door finisher. Refer to EI-32, "
Rear Door" .
Fitting Inspection After Installation

Check that the door glass is securely fit into the glass run groove.

Lower the door glass slightly [approximately 10 to 20 mm (0.39 to 0.79 in)], and check that the clearance
to the sash is parallel. If the clearance between the glass and sash is not parallel, loosen the regulator
bolts, guide rail bolts, and glass and carrier plate bolts to correct the glass position.
SIIA0291E
Door glass bolts : 6.1 N·m (0.62 kg-m, 54 in-lb)
SIIA0290E

GW-86
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
CONSULT-II Function (BCM)EIS002VU
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “BCM”.
If “BCM” is not indicated, go to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORT Changes setting of each function.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E

GW-96
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
3. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror RH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror RH.
Rear Window Defogger Signal CheckEIS002W6
1. CHECK AV COMMUNICATION LINE
AV communication line check is executed. Refer to AT C - 3 2 , "
CAN Communication System Description" .
OK or NG
OK >> GO TO 2.
NG >> Replace display control unit.
2. CHECK CAN COMMUNICATION LINE
CAN communication line check is executed. Refer to LAN-5, "
CAN COMMUNICATION" .
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> In addition, it is necessary to check CAN communication line. Refer to LAN-5, "
CAN COMMUNI-
CATION" .
Filament CheckEIS002W7
1. When measuring voltage, wrap tin foil around the top of the neg-
ative probe.Then press the foil against the wire with your finger.
2. Attach probe circuit tester (in Volt range) to middle portion of
each filament.10 - 11 : Continuity should exist.
LIIA2305E
Is rear window defogger displayed on the display?
SEL122R
SEL263

SQUEAK AND RATTLE TROUBLE DIAGNOSIS
IP-5
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Revision: August 20072004 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, 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.