2007 INFINITI QX56 ECU

GW-74
< SERVICE INFORMATION >
REAR WINDOW DEFOGGER
Work Flow
INFOID:0000000003533073
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-68, "
System Description".
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to GW-74,
"Trouble Diagnosis Symptom Chart".
4. Does rear window defogger and door mirror defogger operate normally? YES: GO TO 5, NO: GO TO 3.
5. Inspection end.
CONSULT-II Function (BCM)INFOID:0000000003533074
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
DATA MONITOR
Display Item List
ACTIVE TEST
Display Item List
Trouble Diagnosis Symptom ChartINFOID:0000000003533075
Make sure other systems using the signal of the following systems operate normally.
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM for
setting the status suitable for required operation, input/output signals are received
from the BCM and received data is displayed.
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.
Monitor item “Operation” Content
REAR DEF SW “ON/OFF”Displays “Press (ON)/others (OFF)” status determined with the rear window defogger
switch.
IGN ON SW “ON/OFF” Displays “IGN (ON)/OFF” status determined with the ignition switch signal.
Test item Content
REAR WINDOW DEFOGGER Gives a drive signal to the rear window defogger to activate it.
Symptom Diagnoses / Service procedure Refer to page
Rear window defogger and door mirror defoggers do not
operate.1. BCM power supply and ground circuit checkBCS-15
2. IPDM E/R auto active test checkPG-20
3. Rear window defogger switch circuit checkGW-75
4. Rear window defogger circuit checkGW-76
5. Replace IPDM E/ RPG-28

GW-80
< SERVICE INFORMATION >
REAR WINDOW DEFOGGER
Check continuity between each door mirror RH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror RH. Refer to GW-84, "
Door Mirror
Assembly".
Rear Window Defogger Signal InspectionINFOID:0000000003533082
1.CHECK AV COMMUNICATION LINE
AV communication line check is executed. Refer to AV-123, "
CAN Communication Line Check".
OK or NG
OK >> GO TO 2.
NG >> Replace display control unit. Refer to AV-145, "
Removal and Installation".
2.CHECK CAN COMMUNICATION LINE
CAN communication line check is executed. Refer to AV-123, "
CAN Communication Line Check".
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-7
.
Filament CheckINFOID:0000000003533083
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.
LIIA2725E
Is rear window defogger displayed on the display?
SEL122R
SEL263

IDX-7
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IDX
ALPHABETICAL INDEX
Pressure switch 2 ............................................. AT-153
Pressure switch 3 ............................... AT-137, AT-157
Pressure switch 5 ............................... AT-145, AT-159
Pressure switch 6 ............................... AT-149, AT-161
Pressure test (A/T) ............................................. AT-52
Propeller shaft ........................................... PR-4, PR-8
Propeller shaft inspection .................................. MA-25
Propeller shaft on vehicle service ....................... PR-8
Propeller shaft vibration ............................ PR-4, PR-8
PS/SEN - Wiring diagram ................................ EC-471
R
R/VIEW - Wiring diagram .................................... DI-66
Radiator ............................................................. CO-14
Rear Audio Remote Control Unit ......................... AV-8
Rear axle ........................................................... RAX-5
Rear bumper ....................................................... EI-15
Rear case (Transfer) .......................... TF-148, TF-181
Rear combination lamp removal and installation ... LT-
101
Rear cover packing replacement diff. .............. RFD-28
Rear door ........................................... BL-117, GW-65
Rear seat belt ...................................................... SB-7
Rear suspension ............................................. RSU-23
Rear view monitor ............................................... DI-63
Rear washer .................................................... WW-29
Rear window defogger ..................................... GW-71
Rear wiper ....................................................... WW-29
Refrigerant connection precaution .................... ATC-6
Refrigerant discharging evacuating charging ATC-175
Refrigerant general precaution .......................... ATC-6
Refrigerant lines ........... ATC-175, ATC-183, ATC-184
Refrigerant pressure sensor ............ EC-692, ATC-184
Relay box .......................................................... PG-78
Remote keyless entry system ............................ BL-40
Removal and installation (A/T) ........... AT-238, AT-241
Removal and installation (Transfer) ................. TF-145
Ring gear diff. inspection ................................. RFD-18
Road wheel size ................................................. GI-51
Rocker cover ..................................................... EM-35
Room lamp ....................................................... LT-110
Room lamp - See Interior lamp ........................ LT-110
ROOM/L - Wiring diagram ................................ LT-116
RP/SEN - Wiring diagram ............................... EC-693
S
SAE J1979 - Service $01 - 09 ........................... EC-49
SEAT - Wiring diagram ..................................... SE-81
Seat belt inspection ............................... SB-12, MA-32
Seat belt pre-tensioner .................................... SRS-50
Seat belt, front ..................................................... SB-3
Seat belt, rear ...................................................... SB-7
Seat, front .......................................................... SE-89
Self-diagnosis (Transfer) .................................... TF-49
SEN/PW - Wiring diagram ............................... EC-483
SHIFT - Wiring diagram ................................... AT-217
Shift control (Transfer) ....................... TF-149, TF-176
Shift lock system .............................................. AT-216
Shock absorber (front) ..................................... FSU-11
Shock absorber (rear) ..................................... RSU-32
Side air bag (satellite) sensor .......................... SRS-49
Side curtain air bag .......................................... SRS-46
Side trim .............................................................. EI-35
SMJ (super multiple junction) ............................ PG-74
SONAR - Wiring diagram ................................... DI-53
Spare tire size ..................................................... GI-51
Spark plug ......................................................... EM-29
Specification value ........................................... EC-139
Speedometer ........................................................ DI-5
Spiral cable ...................................................... SRS-41
SROOF - Wiring diagram .................................. RF-13
SRS - See Supplemental Restraint System ...... SRS-5
SRS - Wiring diagram ...................................... SRS-13
SRS Trouble diagnoses ..................................... SRS-9
Stabilizer bar (front) ......................................... FSU-12
Stabilizer bar (rear) ......................................... RSU-39
Stall test (A/T) .................................................... AT-51
Standardized relay ............................................. PG-72
START - Wiring diagram ................................... SC-11
Starting system .................................................. SC-10
Steering gear, linkage and transfer gear inspection .....
MA-29
Steering linkage ................................................. PS-15
Steering wheel and column ................................. PS-7
Step lamp ......................................................... LT-111
Stop lamp ........................................................... LT-84
Stop lamp switch ................. EC-572, EC-584, EC-647
STOP/L - Wiring diagram ................................... LT-85
Strut (front) ...................................................... FSU-10
STSIG - Wiring diagram .................................... AT-97
Sub-oil pump (Transfer) ...................... TF-154, TF-167
Sun gear (Transfer) ............................ TF-149, TF-176
Sun roof, electric ................................................ RF-10
Sunload sensor .............................................. ATC-144
Sunroof .............................................................. RF-22
Supplemental Restraint System ........................ SRS-5
Supplemental restraint system - Wiring diagram . SRS-
13
Symbols and abbreviations ..................... GI-10, GI-23
Symptom matrix chart ........................................ EC-94
System readiness test (SRT) code .................... EC-55
T
Tachometer .......................................................... DI-5
Tail lamp ............................................................. LT-89
TAIL/L - Wiring diagram ...................................... LT-91
TCM circuit diagram .......................................... AT-50
TCS - Wiring diagram ..................................... BRC-16
TCS (traction control system) ........................... BRC-7
TCS component parts and connector location BRC-14
TCS wheel sensors ........................................ BRC-14
Telephone .......................................................... AV-62
Theft warning system - See Vehicle security (Theft warn-
ing) system ......................................................... BL-67
Thermometer ...................................................... DI-23

IDX-8
ALPHABETICAL INDEX
Three way catalyst ............................................ EM-21
Three way catalyst function (Bank 1) ............... EC-376
Three way catalyst function (Bank 2) ............... EC-376
Three way catalyst precautions ............................ GI-5
Throttle control motor ....................................... EC-601
Throttle control motor relay .............................. EC-589
Throttle position sensor (TPS) .. EC-224, EC-343, EC-
514, EC-516, EC-621
Throttle valve closed position learning ............... EC-80
Tie-rod ............................................................... PS-15
Timing chain ..................................................... EM-37
Tire rotation ....................................................... MA-28
Tire size .............................................................. GI-51
Torque converter installation AT-239, AT-240, AT-243,
AT-244
Torque convertor clutch solenoid valve ... AT-114, AT-
116
Tow truck towing ................................................. GI-44
Towing point ....................................................... GI-45
TPS1 - Wiring diagram .................................... EC-345
TPS2 - Wiring diagram .................................... EC-226
TPS3 - Wiring diagram .................................... EC-623
Traction control system - Wiring diagram ....... BRC-16
Transfer control device ............. TF-75, TF-79, TF-138
Transfer control unit inspection table ................. TF-35
Transfer dropping resistor .................................. TF-89
Transfer fluid temperature sensor TF-103, TF-154, TF-
167
Transfer motor .................................... TF-101, TF-142
Transfer motor relay ........................................ TF-101
Transfer oil replacement ................................... MA-24
Transfer serial number ........................................ GI-50
Transmission serial number ................................ GI-50
Tread-FR&RR (Dimensions) ............................... GI-51
Trim ..................................................................... EI-35
TRNSCV - Wiring diagram .................. BL-130, BL-146
Trouble diagnoses .............................................. GI-11
Turbine revolution sensor ................................ AT-105
TURN - Wiring diagram ...................................... LT-67
Turn signal lamp ................................................. LT-63
Two trip detection logic ...................................... EC-49
Two-pole lift ........................................................ GI-43
V
Vacuum hose (brake system) ............................ BR-20
Vacuum hose drawing (Engine control) ........... EC-106
Valve clearance ................................................ EM-55
Valve guide ....................................................... EM-69
Vanity mirror lamp ............................................. LT-110
VDC (vehicle dynamics control) ........................ BRC-7
VDC -Wiring diagram ...................................... BRC-16
Vehicle identification number .............................. GI-49
Vehicle recovery (freeing a stuck vehicle) .......... GI-45
Vehicle security (theft warning) system ............. BL-67
Vehicle speed sensor (VSS) ............................ EC-464
VEHSEC - Wiring diagram ................................. BL-71
VENT/V - Wiring diagram .................. EC-412, EC-419
VIN registration .................................................. EC-79
Viscosity number (SAE) .................................... MA-12
VSS A/T - Wiring diagram .................. AT-107, AT-109
W
W/ANT - Wiring diagram .................................... AV-59
Wait detection switch ......................................... TF-68
WARN - Wiring diagram ...................................... DI-29
Warning chime .................................................... DI-38
Warning lamps .................................................... DI-28
Washer, front ..................................................... WW-4
Washer, rear .................................................... WW-29
Water pump ...................................................... CO-19
Water temperature gauge ..................................... DI-5
Wheel alignment (front) ..................................... FSU-6
Wheel alignment (rear) ................................... RSU-25
Wheel bearing (front) ........................................ FAX-5
Wheel bearing (rear) ......................................... RAX-5
Wheel hub (rear) ............................................... RAX-5
Wheel size .......................................................... GI-51
Wheelbase (Dimensions) .................................... GI-51
Width (Dimensions) ............................................. GI-51
WINDOW - Wiring diagram .............................. GW-22
Window, door ...................................... GW-62, GW-65
Windshield ....................................................... GW-11
WIP/R - Wiring diagram ................................... WW-33
WIPER - Wiring diagram .................................... WW-8
Wiper, front ........................................................ WW-4
Wiper, rear ....................................................... WW-29
Wiring Diagram (Cell code) list ......................... PG-62
Wiring diagrams .................................................. GI-15
WT-T/WARN - Wiring diagram .......................... WT-11

SQUEAK AND RATTLE TROUBLE DIAGNOSIS
IP-5
< SERVICE INFORMATION >
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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.
73982-9E000: 45 mm (1.77 in) thick, 50 x 50 mm (1.97 x 1.97 in)/73982-50Y00: 10 mm (0.39 in) thick, 50 x 50
mm (1.97 x 1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 x 50 mm (1.18 x 1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.
68370-4B000: 15 x 25 mm (0.59 x 0.98 in) pad/68239-13E00: 5 mm (0.20 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.

SQUEAK AND RATTLE TROUBLE DIAGNOSIS
IP-7
< SERVICE INFORMATION >
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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.

HOW TO USE THIS SECTION
LAN-37
< SERVICE INFORMATION >[CAN]
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HOW TO USE THIS SECTION
CautionINFOID:0000000003533620
• This section describes information peculiar to a vehicle, sheets for trouble diagnosis, and inspection proce-
dures.
• For trouble diagnosis procedure, refer to LAN-14, "
Trouble Diagnosis Procedure".
Abbreviation ListINFOID:0000000003533621
Abbreviations in CAN communication signal chart, and the diagnosis sheet are as per the following list.
Abbreviation Unit nameSELECT SYSTEM
(CONSULT-II)CAN DIAG SUPPORT MNTR
(CONSULT-II)
4WD Transfer control unit ALL MODE AWD/4WD AWD/4WD
A-BAG Air bag diagnosis sensor unit AIR BAG –
ABS ABS actuator and electric unit (control unit) ABS VDC/TCS/ABS
ADP Driver seat control unit AUTO DRIVE POS. –
BCM BCM BCM BCM/SEC
DISP Display control unit – DISPLAY
DLC Data link connector – –
ECM ECM ENGINE ECM
HVAC Front air control HVAC –
ICC ICC unit ICCICC
ICC/e4WD
IPDM-E IPDM E/R IPDM E/R IPDM E/R
LASER ICC sensor – ICC SENSOR
M&A Combination meter – METER/M&A
STRG Steering angle sensor – STRG
TCM A/T assembly A/T TCM

LT-6
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
• to BCM terminal 38.
Ground is supplied
• to BCM terminal 67
• through grounds M57, M61 and M79, and
• to IPDM E/R terminals 38 and 59
• through grounds E9, E15 and E24.
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This
input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R con-
trols the headlamp low relay coil. When energized, this relay directs power
• through 15A fuse (No. 41, located in the IPDM E/R)
• through IPDM E/R terminal 54
• to front combination lamp RH terminal 5, and
• through 15A fuse (No. 40, located in the IPDM E/R)
• through IPDM E/R terminal 52
• to front combination lamp LH terminal 5.
Ground is supplied
• to front combination lamp LH and RH terminal 1
• through grounds E9, E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input request-
ing the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN com-
munication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator.
The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power
• through 10A fuse (No. 34, located in the IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 6, and
• through 10A fuse (No. 35, located in the IPDM E/R)
• through IPDM E/R terminal 55
• to front combination lamp LH terminal 6.
Ground is supplied
• to front combination lamp LH and RH terminal 2
• through grounds E9, E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
XENON HEADLAMP
Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is passed between two tungsten electrodes through a mixture
of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color.
Following are some of the many advantages of the xenon type headlamp.
• The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes.
• Light output is nearly double that of halogen headlamps, affording increased area of illumination.
• The light features a high relative spectral distribution at wavelengths to which the human eye is most sensi-
tive. This means that even in the rain, more light is reflected back from the road surface toward the vehicle,
for added visibility.
• Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, unless the combination switch (lighting
switch) position is changed. If the combination switch (lighting switch) position is changed, then the headlamps
are turned off.
AUTO LIGHT OPERATION
Refer to LT-34, "System Description" for auto light operation.
VEHICLE SECURITY SYSTEM (PANIC ALARM)