heater INFINITI QX56 2007 Factory Service Manual

IDX-2
ALPHABETICAL INDEX
Numerics
2-4WD shift solenoid valve ..... TF-93
, TF-154, TF-167
4WD - Wiring diagram ....................................... TF-24
4WD shift switch ................................................ TF-65
4WD solenoid valve ................ TF-89, TF-154, TF-167
4WD system description .................................... TF-15
4WD system diagram ........................................ TF-19
A
A/C air flow ...................................................... ATC-30
A/C compressor clutch removal and installation .. ATC-
180
A/C compressor mounting ............................. ATC-179
A/C compressor precaution ............................. ATC-11
A/C compressor special service tool ................ ATC-14
A/C control operation (auto A/C) ...................... ATC-27
A/C diagnostic work flow (auto A/C) .............. ATC-133
A/C evaporator ............................................... ATC-186
A/C HFC134a (R134a) system identification ..... ATC-6
A/C HFC134a (R134a) system precaution ........ ATC-5
A/C HFC134a (R134a) system service procedure ATC-
175
A/C HFC134a (R134a) system service tools ... ATC-14
A/C HFC134a system service equipment precaution ...
ATC-11
A/C lubricant (R134a) ...................................... ATC-22
A/C lubrication oil ............................................. ATC-22
A/C operational check ....................... ATC-56, ATC-58
A/C self-diagnoses (auto A/C) ........ ATC-54, ATC-133
A/C service data specification ........................ ATC-193
A/C trouble diagnoses (auto A/C) .................... ATC-34
A/C, A - Wiring diagram ................................... ATC-42
A/T fluid checking ...................... AT-12, AT-51, MA-22
A/T fluid cooler cleaning .................................... AT-14
A/T fluid replacement ............................. AT-12, MA-24
A/T fluid temperature sensor ........................... AT-123
A/T IND - Wiring diagram .................................... DI-36
A/T indicator ........................................................ DI-36
A/T shift lock system ........................................ AT-216
A/T trouble diagnoses ........................................ AT-42
ABS - Wiring diagram ..................................... BRC-16
ABS (anti-lock brake system) ........................... BRC-7
Accelerator control system ............................... ACC-3
Accelerator pedal position (APP) sensor . EC-608, EC-
614, EC-628
Accelerator pedal released position learning ..... EC-80
AF1B1-Wiring diagram EC-242, EC-250, EC-258, EC-
267, EC-638
AF1B2-Wiring diagram EC-244, EC-252, EC-260, EC-
269, EC-640
AF1HB1-Wiring diagram .................................. EC-175
AF1HB2-Wiring diagram .................................. EC-177
Aiming adjustment .................................. LT-23, LT-61
Air bag .............................................................. SRS-3
Air bag precautions .............................................. AV-4
Air cleaner and air duct ..................................... EM-15
Air cleaner filter replacement ................ EM-16, MA-16
Air conditioner cut control ................................. EC-29
Air flow meter - See Mass air flow sensor EC-197, EC-
206
Air fuel ratio sensor 1 .. EC-239, EC-248, EC-256, EC-
264, EC-636
Air fuel ratio sensor 1 heater ........................... EC-174
Air mix. door motor .......................................... ATC-69
Ambient sensor ............................. ATC-138, ATC-149
Angular tightening application ............................. EM-4
Antenna .............................................................. AV-58
APPS1 - Wiring diagram ................................. EC-610
APPS2 - Wiring diagram ................................. EC-616
APPS3 - Wiring diagram ................................. EC-630
ASC/BS - Wiring diagram ............................... EC-574
ASC/SW - Wiring diagram .............................. EC-557
ASCBOF - Wiring diagram .............................. EC-648
ASCD ................................................................ EC-30
ASCD (automatic speed control device) ........... ACS-3
ASCD brake switch ........................... EC-572, EC-647
ASCD indicator lamp ....................................... EC-654
ASCD steering switch ..................................... EC-555
ASCIND - Wiring diagram ............................... EC-655
ATP switch ............................ TF-106, TF-109, TF-114
Audio .................................................................... AV-6
AUDIO - Wiring diagram .................................... AV-11
AUT/DP - Wiring diagram .................................. SE-16
Auto air conditioner - Wiring diagram .............. ATC-42
Auto anti-dazzling inside mirror ........... GW-69, GW-70
Autolamp ............................................................ LT-38
Automatic amplifier ......................................... ATC-59
Automatic drive positioner .................................. SE-11
Automatic transmission number .......................... GI-50
B
Back door ........................................................... BL-88
Back door trim ..................................................... EI-32
Back sonar .......................................................... DI-50
BACK/L - Wiring diagram ................................... LT-87
Back-up lamp ..................................................... LT-87
Ball joint (front) ................................................ FSU-15
Basic inspection ................................................ EC-73
Battery ................................................................. SC-4
Battery current sensor . EC-520, EC-527, EC-534, EC-
541
Battery/Starting/Charging System Tester SC-6, SC-12,
SC-20
BCM (Body control module) ................ BCS-3, AV-106
Block heater ...................................................... EM-78
Blower motor ................................... ATC-93, ATC-153
Body alignment ................................................ BL-164
Body component parts ..................................... BL-151
Body construction ............................................ BL-163
Body exterior paint color .................................. BL-150
Body mounting ................................................. BL-149
Body repair ....................................................... BL-150
Body sealing .................................................... BL-160
Bose speaker amp. .............................................. AV-8
Brake booster .................................................... BR-17

IDX-5
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IDX
ALPHABETICAL INDEX
Grease .............................................................. MA-11
Ground distribution ............................................ PG-31
H
H/AIM - Wiring diagram ...................................... LT-51
H/LAMP - Wiring diagram .................................... LT-9
Handling precautions for plastics ..................... BL-179
Harness connector ............................................ PG-68
Harness layout .................................................. PG-41
Hazard warning lamp ......................................... LT-63
Headlamp ............................................................. LT-5
Headlamp aiming control ................................... LT-51
Headlamp leveler - See Headlamp aiming control . LT-
51
Headlamp removal and installation .................... LT-25
Heated oxygen sensor 2 (bank 1) .... EC-276, EC-287,
EC-300
Heated oxygen sensor 2 (bank 2) .... EC-276, EC-287,
EC-300
Heated oxygen sensor 2 heater (bank 1) ........ EC-181
Heated oxygen sensor 2 heater (bank 2) ........ EC-181
Heated seat ....................................................... SE-82
Heater and cooling unit (Heater core) . ATC-157, ATC-
160
Heater unit (heater core) ............... ATC-157, ATC-160
Height (Dimensions) ........................................... GI-51
HFC134a (R134a) system identification ........... ATC-6
HFC134a (R134a) system precaution ............... ATC-5
HFC134a (R134a) system service procedure ATC-175
HFC134a (R134a) system service tools ......... ATC-14
HFC134a system service equipment precaution ATC-
11
High and low reverse clutch solenoid valve .... AT-147,
AT-149
Homelink universal transceiver ........................ BL-146
Horn ................................................................ WW-48
HORN - Wiring diagram .................................. WW-48
How to erase DTC for OBD system .................. EC-63
HSEAT - Wiring diagram ................................... SE-84
I
IATS - Wiring diagram ..................................... EC-215
ICC - Wiring diagram ....................................... ACS-20
ICC/BS - Wiring diagram ................................. EC-565
ICC/SW - Wiring diagram ................................ EC-550
ICCBOF - Wiring diagram ............................... EC-672
Identification plate .............................................. GI-49
Idle air volume learning ..................................... EC-80
Idle speed .............................................. EC-73, EC-78
Idle speed control (ISC) .................... EC-466, EC-468
Ignition coil .......................................... EM-28, EC-679
Ignition control system .................................... EC-679
Ignition key hole illumination ............................ LT-110
Ignition timing ........................................ EC-73, EC-78
IGNSYS - Wiring diagram ............................... EC-680
ILL - Wiring diagram ......................................... LT-136
Illumination ....................................................... LT-130
In vehicle sensor ........................... ATC-141, ATC-150
In-cabin Microfilter ............................................. MA-21
INJECT - Wiring diagram ................................. EC-660
Injector ............................................................. EC-659
Input clutch solenoid valve ................. AT-135, AT-137
Instrument panel .................................................. IP-10
Intake air temperature sensor ............ EC-214, EC-234
Intake door control linkage adjustment . ATC-85, ATC-
88
Intake door motor ........................... ATC-83, ATC-164
Intake manifold .................................................. EM-17
Intake sensor ................................ ATC-146, ATC-152
Intake valve timing control (Bank 1) ................ EC-161
Intake valve timing control (Bank 2) ................ EC-161
Intake valve timing control position sensor (Bank 1) ....
EC-492
Intake valve timing control position sensor (Bank 2) ....
EC-492
Intake valve timing control solenoid valve (Bank 1) EC-
189
Intake valve timing control solenoid valve (Bank 2) EC-
189
Integrated homelink transmitter - See Homelink univer-
sal tranceiver .................................................... BL-146
Intelligent cruise control (ICC) system ............... ACS-6
Interior ................................................................. EI-35
Interior lamp ...................................................... LT-110
Interior lamp on-off control ................................ LT-111
Internal gear (Transfer) ....................... TF-149, TF-176
IPDM (Intelligent power distribution module engine
room) ................................................................. PG-18
IVCB1 - Wiring diagram ................................... EC-190
IVCB2 - Wiring diagram ................................... EC-192
IVCSB1 - Wiring diagram ................................ EC-493
IVCSB2 - Wiring diagram ................................ EC-495
IVIS (Infiniti vehicle immobilizer system) .......... BL-127
IVIS (Infiniti vehicle immobilizer system) precautions ...
GI-3
IVTB1 - Wiring diagram ................................... EC-164
IVTB2 - Wiring diagram ................................... EC-166
J
Jacking points ..................................................... GI-42
Junction box (J/B) .............................................. PG-76
K
Key illumination ................................................ LT-111
KEYLES - Wiring diagram .................................. BL-45
Knock sensor (KS) ........................................... EC-357
KS - Wiring diagram ........................................ EC-358
L
Laser beam aiming adjustment ....................... ACS-12
Length (Dimensions) .......................................... GI-51
License lamp ...................................................... LT-89
Lifting points ....................................................... GI-43

MA-4
< SERVICE INFORMATION >
GENERAL MAINTENANCE
GENERAL MAINTENANCE
General MaintenanceINFOID:0000000003533859
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owner can perform these
checks and inspections or have their INFINITI dealers perform them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed from time to time, unless otherwise specified.
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the vehicle,
etc.
ItemReference page
TiresCheck the pressure with a gauge at least once a month and always prior to a
long distance trip. Adjust to the specified pressure if necessary. Check carefully
for damage, cuts or excessive wear.—
Wheel lug nutsWhen checking the tires, make sure no nuts are missing, and check for any loose
nuts. Tighten if necessary.WT-7, "
Rotation"
WindshieldClean the windshield on a regular basis. Check the windshield at least every six
months for cracks or other damage. Repair as necessary.—
Tire rotationTires should be rotated every 12,000 km (7,500 miles).WT-7, "
Rotation"
Wheel alignment and
balanceIf the vehicle pulls to either side while driving on a straight and level road, or if
you detect uneven or abnormal tire wear, there may be a need for wheel align-
ment. If the steering wheel or seat vibrates at normal highway speeds, wheel bal-
ancing may be needed.WT-6, "Balancing
Wheels", FSU-6, "Front
Wheel Alignment"
Windshield wiper
bladesCheck for cracks or wear if they do not wipe properly.
—
Doors and engine
hoodCheck that all doors and the engine hood operate smoothly as well as the back
hatch. Also make sure that all latches lock securely. Lubricate if necessary. Make
sure that the secondary latch keeps the hood from opening when the primary
latch is released.
When driving in areas using road salt or other corrosive materials, check lubri-
cation frequently.MA-30, "
Lubricating
Locks, Hinges and Hood
Latches"
Lamps
Make sure that the head lamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check head
lamp aim. Clean the head lamps on a regular basis.LT- 2 0 , "Aiming Adjust-
ment" for US, LT- 3 3 ,
"Aiming Adjustment" for
Canada
ItemReference page
Warning lamps and
buzzers/chimesMake sure that all warning lamps and buzzers/chimes are operating properly.DI-21, "
Electrical Com-
ponent Inspection"
Windshield wiper and
washerCheck that the wipers and washer operate properly and that the wipers do not
streak.—
Windshield defrosterCheck that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioner.—
Steering wheelCheck that it has the specified play. Be sure to check for changes in the steering
condition, such as excessive play, hard steering or strange noises.PS-7, "
On-Vehicle In-
spection and Service"
SeatsCheck seat position controls such as seat adjusters, seat back recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every po-
sition. Check that the head restraints move up and down smoothly and that the
locks (if equipped) hold securely in all latched positions. Check that the latches
lock securely for folding-down rear seat backs.—
Seat beltsCheck that all parts of the seat belt system (e.g. buckles, anchors, adjusters and
retractors) operate properly and smoothly and are installed securely. Check the
belt webbing for cuts, fraying, wear or damage.SB-10, "
Seat Belt Inspec-
tion", MA-30, "Checking
Seat Belts, Buckles, Re-
tractors, Anchors and
Adjusters"
Accelerator pedalCheck the pedal for smooth operation. Keep the floor mats away from the pedal. —

ENGINE MAINTENANCE
MA-13
< SERVICE INFORMATION >
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3. Open the radiator drain plug at the bottom of the radiator, and
remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine
removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Refer to CO-9, "
Changing Engine Cool-
ant" .
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to GI-45
.
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
WBIA0391E
PBIC0146E
WBIA0392E
Radiator drain plug : Refer to CO-13 .
RH cylinder block drain plug : Refer to EM-78
.

MA-20
< SERVICE INFORMATION >
CHASSIS AND BODY MAINTENANCE
CHASSIS AND BODY MAINTENANCE
Changing In-cabin MicrofilterINFOID:0000000003533875
1. Remove the two lower glove box hinge pins to remove the glove
box from the instrument panel and let it hang from the cord.
2. Remove the screw and remove the in-cabin microfilter cover.
3. Remove the in-cabin microfilters from the front heater and cool-
ing unit assembly housing.
4. Insert the first new in-cabin microfilter into the front heater and
cooling unit assembly housing and slide it over to the right.
Insert the second new in-cabin microfilter into the front heater
and cooling unit assembly housing.
NOTE:
The in-cabin microfilters are marked with air flow arrows. The
end of the microfilter with the arrow should face the rear of the
vehicle. The arrows should point downward.
5. Install the in-cabin microfilter cover.
WLIA0027E
LJIA0134E
LJIA0148E
LJIA0134E

HARNESS
PG-61
< SERVICE INFORMATION >
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ICC/BS EC ICC Steering Switch
ICC/SW EC ICC Brake Switch
I/MIRR GW Inside Mirror (Auto Anti-Dazzling Mirror)
IATS EC Intake Air Temperature Sensor
IGNSYS EC Ignition System
ILL LT Illumination
INJECT EC Injector
INT/L LT Room/Map, Vanity, Cargo, Personal, Foot, Step, and Puddle Lamps
KEYLES BL Remote Keyless Entry System
KS EC Knock Sensor
MAFS EC Mass Air Flow Sensor
MAIN EC Main Power Supply and Ground Circuit
METER DI Speedometer, Tachometer, Temp. and Fuel Gauges
MIL/DL EC Malfunction Indicator Lamp
MIRROR GW Door Mirror
NATS BL Nissan Anti-Theft System
NAVI AV Navigation System
O2H2B1 EC Rear Heated Oxygen Sensor 2 Heater Bank 1
O2H2B2 EC Rear Heated Oxygen Sensor 2 Heater Bank 2
O2S2B1 EC Heated Oxygen Sensor 2 Bank 1
O2S2B2 EC Heated Oxygen Sensor 2 Bank 2
P/SCKT WW Power Socket
PGC/V EC EVAP Canister Purge Volume Control Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE) (Bank 1)
PNP/SW EC Park/Neutral Position Switch
POS EC Crankshaft Position Sensor (POS)
POWER PG Power Supply Routing
PRE/SE EC EVAP Control System Pressure Sensor
PS/SEN EC Power Steering Pressure Sensor
R/VIEW DI Rear View Monitor
RP/SEN EC Refrigerant Pressure Sensor
SEN/PW EC Sensor Power Supply
SHIFT AT A/T Shift Lock System
SONAR DI Rear Sonar System
SROOF RF Sunroof
SRS SRS Supplemental Restraint System
START SC Starting System
STOP/L LT Stop Lamp
T/TOW LT Trailer Tow
T/WARN WT Low Tire Pressure Warning System
TAIL/L LT Parking, License and Tail Lamps
T/F TF Transfer Case
TPS1 EC Throttle Position Sensor
TPS2 EC Throttle Position Sensor
TPS3 EC Throttle Position Sensor
TRNSCV BL HOMELINK® Universal Transceiver
TURN LT Turn Signal and Hazard Warning Lamps
VDC BRC Vehicle Dynamic Control System
VEHSEC BL Vehicle security (theft warning) system
VENT/V EC EVAP Canister Vent Control Valve
W/ANT AV Audio Antenna
WARN DI Warning Lamps

SC-18
< SERVICE INFORMATION >
CHARGING SYSTEM
Before starting, perform the preliminary inspection. Refer to "PRELIMINARY INSPECTION".
1. Stop the operation of the power generation variable voltage control system using either of the following
procedures.
• Using the CONSULT-II, select "ENGINE" from "SELECT SYSTEM" and set the "ALT DUTY" to 0%.
Keep "ALT DUTY" at 0% until the end of the inspection. When the "ALT DUTY" value is 0% or 100%,
normal power generation is performed according to the characteristic of the IC regulator in the genera-
tor.
• Turn the ignition switch off, and disconnect the battery current sensor connector. Disconnecting the bat-
tery current sensor may cause DTC (P1550 - P1554) to set. After finishing the inspection, connect the
battery current sensor connector and erase the self-diagnostic results history of the engine using CON-
SULT-II.
2. Turn off all loads on the vehicle electrical system.
3. Perform battery and starting system test with Battery/Starting/
Charging system tester.
4. Press “ENTER” to begin the charging system test.
5. Start engine.
6. Press “ENTER” until “LOADS OFF REV ENGINE 5 SEC” is dis-
played.
7. Raise and hold the engine speed at 1,500 to 2,000 rpm for about
5 seconds, then return the engine to idle.
Once the increase in engine rpm is detected, press “ENTER” to
continue.
NOTE:
• If after 30 seconds an increase in engine idle speed is not
detected, “RPM NOT DETECTED” will display.
• Some engines may have a higher idle initially after starting,
particularly when the engine is cold. The tester may detect this
without any other action being taken. If this occurs, continue
on with the testing process. The final results will not be affected.
8. The tester now checks the engine at idle and performs the
DIODE/RIPPLE check.
9. When complete, the tester will prompt you to turn on the follow-
ing electrical loads.
• Heater fan set to highest speed. Do not run the A/C or wind-
shield defroster.
• Headlamp high beam
• Rear window defogger
NOTE:
Do not run the windshield wipers or any other cyclical loads.
SEL417X
SEL418X
SEL419X

FRONT SEAT
SE-87
< SERVICE INFORMATION >
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4. From inside of the seatback, squeeze the headrest holder tabs
at the base of the stay pipe and pull up to remove.
NOTE:
Before installing the headrest holder, check its orientation (front/
rear and right/left).
Removal of seatback assembly
1. After completing the steps 1 and 2 of "Seatback Trim and Pad", remove the side air bag harness connec-
tor from the seat cushion.
2. Remove the mounting bolts (2 for each side) and seatback assembly.
Installation of seatback assembly
• Installation is in the reverse order of removal.
SEAT CUSHION TRIM AND PAD (DRIVER) OR SEAT CUSHION ASSEMBLY (PASSENGER)
CAUTION:
• Front passenger seat is equipped with an Occupant Classification System sensor and control mod-
ule. Do not disassemble front passenger seat cushion assembly or remove the trim as this will affect
the Occupant Classification System calibration.
• Always replace passenger seat cushion as an assembly.
• When removed, the passenger seat cushion must always be placed pan side UP to prevent damage.
• During installation, the wire harness clips must be reinstalled in the holes they were originally in.
Do not add clips.
• The Occupant Classification System control module can only be replaced as part of the seat cushion
assembly.
NOTE:
If the vehicle has been involved in a collision the seat must be inspected for damage. Refer to SRS-49
.
1. Remove the power seat switch knobs, power seat switch
escutcheon and lumbar switch bezel.
2. Remove the power seat and power lumbar switches.
3. Remove four bolts and the seat cushion assembly.
4. Remove the retainer on the seat cushion frame, then remove the harness connector for the seat heater.
LRS023
LIIA1581E
SIIA0503E

SE-88
< SERVICE INFORMATION >
FRONT SEAT
5. Remove the front seat cushion finisher (inner).
6. On the drivers seat only, after removing the seat cushion trim and pad, remove the hog rings to separate
the trim cover from the pad and seat cushion heater unit.
LIIA0285E