seats INFINITI QX56 2007 Factory Service Manual

HEATER & COOLING UNIT ASSEMBLYATC-133
< SERVICE INFORMATION >
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Rear Heater and Cooling Unit Assembly
Removal and InstallationINFOID:0000000003533279
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-150, "
HFC-134a (R-134a) Service Proce-
dure".
4. Drain the coolant from the engine cooling system. Refer to MA-12, "
Changing Engine Coolant".
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 motor 6. 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 size E. O-ring size
⇐Front
NOTE: The O-ring size 8 is the high-side and the O-ring size 16 is the low-side.

ATC-134
< SERVICE INFORMATION >
HEATER & COOLING UNIT ASSEMBLY
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, "
Removal and Installation".
8. Remove the steering column. Refer to PS-10
.
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-3
.
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 tr im panels when removing the front heater and
cooling unit assembly with it at tached 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 com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the s pecified coolant mixture. Refer to MA-12, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to ATC-150, "
HFC-134a (R-134a) Service Procedure".
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-150, "HFC-134a (R-134a) Service Proce-
dure".
2. Drain the coolant from the engine cooling system. Refer to MA-12, "
Changing 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-34
.
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 com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the s pecified coolant mixture. Refer to MA-12, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to ATC-150, "
HFC-134a (R-134a) Service Procedure".
LJIA0021E

BL-8
< SERVICE INFORMATION >
SQUEAK AND RATTLE TROUBLE DIAGNOSIS
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-329
< SERVICE INFORMATION >
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Check compression pressure. Refer to EM-64, "On-Vehicle Service".
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 Check" .
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-80, "
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-613
.)
• Fuel pressure regulator (Refer to EC-80, "
Fuel Pressure Check" .)
• Fuel lines
• Fuel filter for clogging
>> Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. Refer to EC-71, "
Basic Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Follow the EC-71, "
Basic Inspection" .
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.At idling: Approximately 350 kPa (3.57 kg/cm
2 , 51 psi)
Items Specifications
Target idle speed 650 ± 50 rpm (in P or N position)
Ignition timing 15 ± 5° BTDC (in P or N position)
A/F sensor 1 terminal ECM terminal
Bank 1135
256
BBIA0376E

SQUEAK AND RATTLE TROUBLE DIAGNOSIS
EI-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 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.

EI-36
< SERVICE INFORMATION >
FLOOR TRIM
FLOOR TRIM
Removal and InstallationINFOID:0000000003533137
REMOVAL
1. Remove front seats. Refer to SE-83 .
• Remove subwoofer. Refer to AV-46, "
Removal and Installation" .
• Remove navigation display control unit. Refer to AV-145, "
Removal and Installation" .
2. Remove second row seats. Refer to SE-89, "
Removal and Installation" and SE-89, "Removal and Instal-
lation" , if equipped.
3. Remove third row rear seats. Refer to SE-95
.
4. Remove lower seat belt anchors. Refer to SB-3
.
5. Remove lower body side trim. Refer to EI-34
.
6. Remove luggage lower side finishers (left / right). Refer to EI-39
.
7. Remove kicking plates. Refer to EI-34
.
8. Remove center console. Refer to IP-10
.
9. Remove rear console, if equipped. Refer to IP-14, "
Disassembly and Assembly" .
10. Remove rear lower finisher. Refer to EI-39
.
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

EM-32
< SERVICE INFORMATION >
FUEL INJECTOR AND FUEL TUBE
7. Remove the fuel injector from the fuel tube using the followingsteps.
a. Spread open and remove the clip.
b. Remove the fuel injector from the fuel tube by pulling straight out.
CAUTION:
• Be careful with remaining fuel that may leak out from fueltube.
• Do not damage injector nozzles during removal.
• Do not bump or drop fuel injectors.
• Do not disassemble fuel injectors.
8. Remove the fuel damper from each fuel tube.
INSTALLATION
1. Install the fuel damper to each fuel tube using the following steps.
a. Apply engine oil to the new O-ring and set it into the cup of the fuel tube.
CAUTION:
• Handle O-ring with bare hands. Never wear gloves.
• Lubricate new O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of for-eign material.
• When installing O-ring, do not scratch it with tool or fin-
gernails.
• Do not twist or stretch the O-ring.
b. Make sure that the backup spacer is in the O-ring connecting surface of the fuel damper.
NOTE:
The backup spacer is part of the fuel damper assembly.
c. Insert the fuel damper until it seats on the fuel tube. CAUTION:
• Insert straight, making sure that the axis is lined up.
• Do not pressure-fit with excessive force.
d. Install the cap, and then tighten the bolts evenly. • After tightening the bolts, make sure that there is no gap between the cap and fuel tube.
2. Install new O-rings to the fuel injector paying attention to the items below. CAUTION:
• Upper and lower O-rings are different colors.
• Handle O-ring with bare hands. Never wear gloves.
KBIA2506E
Reference value :130 N (13.3 kg, 29.2 lb)
Fuel tube side : Blue
Nozzle side : Brown
KBIA2473E

EM-68
< SERVICE INFORMATION >
CYLINDER HEAD
7. Remove the valve oil seal using Tool.
8. Replace the valve seat if necessary. Refer to EM-69, "
Inspection After Disassembly".
9. Replace the valve guide if necessary. Refer to EM-69, "
Inspection After Disassembly".
10. Remove the spark plug tube, as necessary.
• Remove the spark plug tube out of the cylinder head using suitable tool.
CAUTION:
• Do not damage the cylinder head.
• Do not remove the spark plug tube unless absolutely necessary. Once removed, the spark plug
tube will be deformed and cannot be reused.
ASSEMBLY
1. Install the valve guide if necessary. Refer to EM-69, "Inspection After Disassembly".
2. Install the valve seat if necessary. Refer to EM-69, "
Inspection After Disassembly".
3. Install the valve oil seal using Tool.
• Apply new engine oil on the new valve oil seal joint and seal
lip.
• Install the valve oil seal to the specified height "H".
4. Install the valves in their original position.
5. Install the valve spring seats.
6. Install the valve springs.
• Install the narrow pitch end (paint mark side) to the cylinder
head side.
7. Install the valve spring retainers.Tool number : KV10107902 (J-38959)
WBIA0478E
Tool number : KV10115600 (J-38958)
Height "H" (without valve spring installed)
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
WBIA0490E
SEM085D

EM-72
< SERVICE INFORMATION >
CYLINDER HEAD
VALVE SEAT CONTACT
• After confirming that the dimensions of the valve guides and valves
are within specifications, perform this procedure.
• Apply prussian blue (or white lead) onto the contacting surface of
the valve seat to check the condition of the valve contact on the
surface.
• Check if the contact area band is continuous all around the circum-
ference.
• If not, grind to adjust the valve fit and check again. If the contacting
surface still has NG conditions even after the re-check, replace the
valve seat.
VALVE SEAT REPLACEMENT
When the valve seat is removed, replace it with oversized (0.5 mm, 0.020 in) valve seat.
1. Bore out the old seat until it collapses. Boring should not continue beyond the bottom face of the seat
recess in the cylinder head. Set the machine depth stop to ensure this.
2. Ream the cylinder head recess diameter for service valve seat.
• Be sure to ream in circles concentric to the valve guide center.
• This will enable valve seat to fit correctly.
3. Heat the cylinder head to 110° to 130°C (230° to 266°F) by
soaking it in heated oil.
4. Cool the valve seats well with dry ice. Force fit the valve seat into the cylinder head.
CAUTION:
• Avoid directly touching cold valve seats.
• Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
5. Finish the seat to the specified dimensions using suitable tool.
Refer to EM-103, "
Standard and Limit".
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on the cutter or cutting many different times may
result in stage valve seat.
SBIA0322E
Oversize [0.5 mm (0.020 in)] (Service):
Intake : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A
SEM934C

CYLINDER BLOCK
EM-85
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12. Install the connecting rod bearings to the connecting rod and
connecting rod cap.
• When installing the connecting rod bearings, apply engine oil
to the bearing surface (inside). Do not apply oil to the back
surface, but thoroughly clean it.
• When installing, align the connecting rod bearing stopper pro-
trusion with the cutout of the connecting rod to install.
• Check that the oil holes on the connecting rod and those on
the corresponding bearing are aligned.
13. Install the piston and connecting rod assembly to the crankshaft
using Tool.
• Position the crankshaft pin corresponding to the connecting
rod to be installed onto bottom dead center.
• Apply engine oil sufficiently to the cylinder bore, piston, and
crankshaft pin.
• Match the cylinder position with the cylinder No. on the con-
necting rod to install.
• Install the piston with the front mark on the piston crown facing
the front of the engine.
CAUTION:
Be careful not to damage the crankshaft pin, resulting from an interference of the connecting rod
big end.
14. Install connecting rod cap.
• Match the stamped cylinder number marks on the connecting
rod with those on the cylinder cap to install.
15. Tighten connecting rod bolts using Tool.
• Apply engine oil to threads and seats of connecting rod bolts.
• After tightening bolts, make sure the crankshaft rotates
smoothly.
• Check connecting rod side clearance. Refer to EM-93,
"Inspection After Disassembly".
PBIC0266E
Tool number : EM03470000 (J-8037)
WBIA0626E
KBIA2536E
Tool number : KV10112100 (BT-8653-A)
Connecting rod bolts
Step 1 : 19.6 N·m (1.5 kg-m, 11 ft-lb)
Step 2 : 90° clockwise
WBIA0627E