2006 INFINITI QX56 seats

ATC-154
HEATER & COOLING UNIT ASSEMBLY
Revision: November 20092006 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YF
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Move the two front seats to the rearmost position on the seat track.
2. Disconnect the battery negative terminal and battery positive terminal.
3. Discharge the refrigerant from the A/C system. Refer to ATC-171, "
Discharging Refrigerant" .
WJIA2315E
1. Rear heater and cooling unit assembly 2. Rear A/C pipes 3. Rear A/C heater core pipes
4. Rear heater core hose 5. Rear blower motor6. Underfloor rear A/C pipes
7. Underfloor rear heater core pipes A. Bolt torque specifications B. Leak checking order (l - r)
C. Tightening torque D. Wrench sizeE. O-ring size
⇐ Front
NOTE: The O-ring size 8 is the high-side and the O-ring size 16 is the low-side.

HEATER & COOLING UNIT ASSEMBLYATC-155
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Revision: November 2009 2006 QX56
4. Drain the coolant from the engine cooling system. Refer to MA-13, "DRAINING ENGINE COOLANT" .
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Remove the instrument panel and console panel. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove the steering column. Refer to PS-10, "
STEERING COLUMN" .
9. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse block (J/B) electrical connectors. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
10. Disconnect the steering member from each side of the vehicle body.
11. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi- cle.
CAUTION:
Use care not to damage the seats and interior trim panels when removing the front heater and
cooling unit assembly with it attached to the steering member.
12. Remove the front heater and cooling unit assembly from the steering member.
Installation
Installation is in the reverse order of removal.
CAUTION:

Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply
compressor oil to it when installing it.

After charging the refrigerant, check for leaks.
NOTE:

Fill the engine cooling system with the specified coolant mixture. Refer to MA-14, "REFILLING ENGINE
COOLANT" .

Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-171, "Discharging Refrigerant" .
2. Drain the coolant from the engine cooling system. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
3. Disconnect the rear heater core hoses from the rear heater core.
4. Disconnect the rear A/C pipes from the rear expansion valve.
5. Remove the luggage side finisher lower RH. Refer to EI-35,
"BODY SIDE TRIM" .
6. Disconnect the following electrical connectors:

Rear blower motor

Rear blower motor resistor

Rear air mix door motor
7. Disconnect the ducts from the rear heater and cooling unit assembly.
8. Remove the rear heater and cooling unit assembly.
Installation
Installation is in the reverse order of removal.
CAUTION:

Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply
compressor oil to it when installing it.

After charging the refrigerant, check for leaks.
NOTE:

Fill the engine cooling system with the specified coolant mixture. Refer to MA-14, "REFILLING ENGINE
COOLANT" .

Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
LJIA0021E

BL-1
BODY, LOCK & SECURITY SYSTEM
I BODY
CONTENTS
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 4
Precautions for work ................................................ 4
PREPARATION ...................................................... ..... 5
Special service tool ............................................. ..... 5
Commercial Service Tool .................................... ..... 5
SQUEAK AND RATTLE TROUBLE DIAGNOSES ..... 6
Work Flow ................................................................ 6 CUSTOMER INTERVIEW ................................ ..... 6
DUPLICATE THE NOISE AND TEST DRIVE .. ..... 7
CHECK RELATED SERVICE BULLETINS ...... ..... 7
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ................................................. ..... 7
REPAIR THE CAUSE ...................................... ..... 7
CONFIRM THE REPAIR .................................. ..... 8
Generic Squeak and Rattle Troubleshooting ...... ..... 8
INSTRUMENT PANEL ..................................... ..... 8
CENTER CONSOLE ........................................ ..... 8
DOORS ............................................................ ..... 8
TRUNK ............................................................. ..... 9
SUNROOF/HEADLINING ................................ ..... 9
OVERHEAD CONSOLE (FRONT AND REAR) ..... 9
SEATS .............................................................. ..... 9
UNDERHOOD .................................................. ..... 9
Diagnostic Worksheet ......................................... ... 10
HOOD .................................................................... ... 12
Fitting Adjustment ............................................... ... 12
CLEARANCE AND SURFACE HEIGHT
ADJUSTMENT ................................................. ... 13
HOOD LOCK ADJUSTMENT .......................... ... 13
Removal and Installation of Hood Assembly ....... ... 13
Removal and Installation of Hood Lock Control .. ... 14
REMOVAL ........................................................ ... 14
INSTALLATION ................................................ ... 15
Hood Lock Control Inspection ............................. ... 15
POWER DOOR LOCK SYSTEM ........................... ... 16
Component Parts and Harness Connector Location ... 16
System Description ............................................. ... 17OUTLINE ..........................................................
... 18
Schematic ............................................................ ... 19
Wiring Diagram — D/LOCK — ............................ ... 20
Terminals and Reference Value for BCM ............ ... 25
Work Flow ............................................................... 25
CONSULT–II Function (BCM) ............................. ... 26
CONSULT–II INSPECTION PROCEDURE ...... ... 26
DATA MONITOR .............................................. ... 27
ACTIVE TEST ..................................................... 28
Trouble Diagnoses Symptom Chart .................... ... 29
BCM Power Supply and Ground Circuit Check ... ... 29
Door Switch Check ................................................. 31
Key Switch (Insert) Check ................................... ... 33
Door Lock/Unlock Switch Check ............................ 34
Glass Hatch Switch Circuit Inspection ................. ... 36
Front Door Lock Assembly LH (Actuator) Check . ... 38
Front Door Lock Actuator RH Check ................... ... 39
Rear Door Lock Actuator RH/LH Check .............. ... 40
Glass Hatch Lock Actuator Check .......................... 41
Front Door Lock Assembly LH (Key Cylinder Switch)
Check .................................................................. ... 42
REMOTE KEYLESS ENTRY SYSTEM .................. ... 44
Component Parts and Harness Connector Location ... 44
System Description .............................................. ... 45
INPUTS ............................................................ ... 45
OPERATING PROCEDURE ............................. ... 46
CAN Communication System Description ........... ... 48
Schematic ............................................................ ... 49
Wiring Diagram — KEYLES — ............................ ... 50
......................................................................... ... 50
......................................................................... ... 51
......................................................................... ... 52
Terminals and Reference Value for BCM ............ ... 53
Terminals and Reference Value for IPDM E/R .... ... 54
CONSULT-II Function (BCM) .............................. ... 55
CONSULT-II Inspection Procedure ...................... ... 55
“MULTI REMOTE ENT” .................................... ... 55
CONSULT-II Application Items ............................ ... 56
“MULTI REMOTE ENT” .................................... ... 56
Trouble Diagnosis Procedure .............................. ... 59

SQUEAK AND RATTLE TROUBLE DIAGNOSESBL-9
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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/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 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.

DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS-FIRE
EC-331
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Revision: November 2009 2006 QX56
7. CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-29, "
SPARK PLUG (PLATI-
NUM-TIPPED TYPE)" .
NG >> 1. Repair or clean spark plug.
2. GO TO 8.
8. CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
OK or NG
OK >> INSPECTION END
NG >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to MA-18, "
Changing
Spark Plugs" .
9. CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-63, "
CHECKING COMPRESSION PRESSURE" .
OK or NG
OK >> GO TO 10.
NG >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10. CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-80, "
FUEL PRESSURE RELEASE" .
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-82, "
FUEL PRESSURE CHECK" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . DETECT MALFUNCTIONING PART
Check the following.

Fuel pump and circuit (Refer to EC-604, "FUEL PUMP" .)

Fuel pressure regulator (Refer to EC-82, "FUEL PRESSURE CHECK" .)

Fuel lines

Fuel filter for clogging
>> Repair or replace.
SEF156I
Spark should be generated.
At idle: Approximately 350 kPa (3.57 kg/cm
2 , 51 psi)

EI-1
EXTERIOR & INTERIOR
I BODY
CONTENTS
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 3
Service Notice .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
PREPARATION ...................................................... ..... 4
Special Service Tools .......................................... ..... 4
Commercial Service Tools ................................... ..... 4
SQUEAK AND RATTLE TROUBLE DIAGNOSES ..... 5
Work Flow ................................................................ 5 CUSTOMER INTERVIEW ................................ ..... 5
DUPLICATE THE NOISE AND TEST DRIVE .. ..... 6
CHECK RELATED SERVICE BULLETINS ...... ..... 6
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ................................................. ..... 6
REPAIR THE CAUSE ...................................... ..... 6
CONFIRM THE REPAIR .................................. ..... 7
Generic Squeak and Rattle Troubleshooting ...... ..... 7
INSTRUMENT PANEL ..................................... ..... 7
CENTER CONSOLE ........................................ ..... 7
DOORS ............................................................ ..... 7
TRUNK ............................................................. ..... 8
SUNROOF/HEADLINING ................................ ..... 8
OVERHEAD CONSOLE (FRONT AND REAR) ..... 8
SEATS .............................................................. ..... 8
UNDERHOOD .................................................. ..... 8
Diagnostic Worksheet ......................................... ..... 9
CLIP AND FASTENER .......................................... ....11
Description .......................................................... .... 11
FRONT BUMPER .................................................. ... 13
Removal and Installation ..................................... ... 13
REMOVAL ........................................................ ... 13
INSTALLATION ................................................ ... 14
REAR BUMPER .................................................... ... 15
Removal and Installation ..................................... ... 15
REMOVAL ........................................................ ... 16
INSTALLATION ................................................ ... 16FRONT GRILLE .....................................................
... 17
Removal and Installation ..................................... ... 17
REMOVAL ........................................................ ... 17
INSTALLATION ................................................ ... 17
COWL TOP ............................................................ ... 18
Removal and Installation ..................................... ... 18
REMOVAL ........................................................ ... 18
INSTALLATION ................................................ ... 19
FRONT FENDER ................................................... ... 20
Removal and Installation ..................................... ... 20
REMOVAL ........................................................ ... 20
INSTALLATION ................................................ ... 20
OVER FENDER ...................................................... ... 21
Removal and Installation ..................................... ... 21
REMOVAL ........................................................ ... 21
INSTALLATION ................................................ ... 21
FENDER PROTECTOR ......................................... ... 23
Removal and Installation ..................................... ... 23
REMOVAL ........................................................ ... 23
INSTALLATION ................................................ ... 23
LICENSE LAMP FINISHER ................................... ... 24
Removal and Installation ..................................... ... 24
REMOVAL ........................................................ ... 24
INSTALLATION ................................................ ... 24
RUNNING BOARDS .............................................. ... 25
Removal and Installation ..................................... ... 25
REMOVAL ........................................................ ... 25
INSTALLATION ................................................ ... 25
REAR SPOILER ..................................................... ... 26
Removal and Installation ..................................... ... 26
REMOVAL ........................................................ ... 26
INSTALLATION ................................................ ... 26
ROOF RACK .......................................................... ... 27
Removal and Installation ..................................... ... 27
REMOVAL ........................................................ ... 27
INSTALLATION ................................................ ... 27
DOOR OUTSIDE MOLDING .................................. ... 28
Removal and Installation ..................................... ... 28
......................................................................... ... 28
......................................................................... ... 29

EI-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/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 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 installed to the engine wall
2. Components that pass through the engine wall
3. Engine wall mounts and connectors
4. Loose radiator installation 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.

FLOOR TRIMEI-37
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FLOOR TRIMPFP:74902
Removal and InstallationEIS004WS
REMOVAL
1. Remove front seats. Refer to SE-91, "FRONT SEAT" .

Remove subwoofer. Refer to AV- 5 9 , "SUBWOOFER" .

Remove navigation display control unit. Refer to AV- 1 6 7 , "DISPLAY CONTROL UNIT" .
2. Remove second row seats. Refer to SE-98, "
Second Row Outboard" and SE-98, "Second Row Center" ,
if equipped.
3. Remove third row rear seats. Refer to SE-105, "
THIRD SEAT" .
4. Remove lower seat belt anchors. Refer to SB-3, "
SEAT BELTS" .
5. Remove lower body side trim. Refer to EI-35, "
BODY SIDE TRIM" .
6. Remove luggage lower side finishers (left / right). Refer to EI-40, "
LUGGAGE FLOOR TRIM" .
7. Remove kicking plates. Refer to EI-35, "
BODY SIDE TRIM" .
8. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
9. Remove rear console, if equipped. Refer to IP-19, "
DISASSEMBLY AND ASSEMBLY" .
10. Remove rear lower finisher. Refer to EI-40, "
LUGGAGE FLOOR TRIM" .
11. Remove carpet.
12. Remove floor mat hook from front carpet.
INSTALLATION
Installation is in the reverse order of removal.
1. Carpet 2. Floor mat hook
WIIA0968E