pressure INFINITI M35 2006 Factory Service Manual

EC-1436
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REFRIGERANT PRESSURE SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureNBS005Q9
1. CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch ON.
3. Check voltage between ECM terminal 70 and ground with CON-
SULT-II or tester.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
49 B/YSensor power supply
(Refrigerant pressure sen-
sor, Battery current sensor)[Ignition switch: ON]Approximately 5V
67 B/WSensor ground
(MAF sensor, IAT sensor,
ECT sensor, EVAP control
system pressure sensor,
PSP sensor, ASCD/ICC
steering switch, Battery cur-
rent sensor, Refrigerant
pressure sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
70 L/R Refrigerant pressure sensor[Engine is running]
Warm-up condition
Both A/C switch and blower fan motor
switch: ON (Compressor operates)1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E

REFRIGERANT PRESSURE SENSOR
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Revision: 2006 January2006 M35/M45
2. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-885, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
1. Body ground M70 2. Body ground M16
PBIB2782E
PBIA9537J
Voltage: Approximately 5V
PBIB0188E

EC-1438
[VK45DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2006 January2006 M35/M45
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-878, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationNBS005QA
REFRIGERANT PRESSURE SENSOR
Refer to ATC-167, "Removal and Installation of Refrigerant Pressure Sensor" . Continuity should exist.
Continuity should exist.

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-1461
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Revision: 2006 January2006 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureNBS005QT
Idle Speed and Ignition TimingNBS005QU
*: Under the following conditions:
Air conditioner switch: OFF
Electric load: OFF (Lights, heater fan & rear window defogger)
Steering wheel: Kept in straight-ahead position
Calculated Load ValueNBS005QV
Mass Air Flow SensorNBS005QW
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorNBS005QX
Engine Coolant Temperature SensorNBS005QY
Fuel Tank Temperature SensorNBS005QZ
Crankshaft Position Sensor (POS)NBS005R0
Refer to EC-1105, "Component Inspection" .
Camshaft Position Sensor (PHASE)NBS005R1
Refer to EC-1112, "Component Inspection" .
A/F Sensor 1 HeaterNBS005R2
Fuel pressure at idling kPa (kg/cm2 , psi)Approximately 350 (3.57, 51)
Target idle speed No load* (in P or N position) 65050 rpm
Air conditioner: ON In P or N position 650 rpm or more
Ignition timing In P or N position 12
5 BTDC
Condition Calculated load value% (Using CONSULT-II or GST)
At idle14 - 33
At 2,500 rpm12 - 25
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle0.9 - 1.2V*
Mass air flow (Using CONSULT-II or GST)2.0 - 6.0 gꞏm/sec at idle*
7.0 - 20.0 gꞏm/sec at 2,500 rpm*
Temperature C (F) Resistance k
25 (77)1.800 - 2.200
Temperature C (F) Resistance k
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Temperature C (F) Resistance k
20 (68)2.3 - 2.7
50 (122)0.79 - 0.90
Resistance [at 25C (77F)] 2.3 - 4.3

EM-2Revision: 2006 January2006 M35/M45 IGNITION COIL ......................................................... 42
Components ........................................................... 42
Removal and Installation ........................................ 42
REMOVAL ........................................................
... 42
INSTALLATION .................................................... 42
SPARK PLUG (PLATINUM-TIPPED TYPE) ............. 43
Components ........................................................... 43
Removal and Installation ........................................ 43
REMOVAL ........................................................
... 43
INSPECTION AFTER REMOVAL ........................ 43
INSTALLATION .................................................... 44
FUEL INJECTOR AND FUEL TUBE ........................ 45
Components ........................................................... 45
Removal and Installation ........................................ 45
REMOVAL ........................................................
... 45
INSTALLATION .................................................... 47
INSPECTION AFTER INSTALLATION ................ 50
ROCKER COVER ..................................................... 51
Components ........................................................... 51
Removal and Installation ........................................ 51
REMOVAL ........................................................
... 51
INSTALLATION .................................................... 52
FRONT TIMING CHAIN CASE ................................. 54
Removal and Installation ........................................ 54
REMOVAL ........................................................
... 54
INSTALLATION .................................................... 58
INSPECTION AFTER INSTALLATION ................ 63
TIMING CHAIN .......................................................... 64
Components ........................................................... 64
Removal and Installation ........................................ 65
REMOVAL ........................................................
... 65
INSPECTION AFTER REMOVAL ........................ 72
INSTALLATION .................................................... 72
INSPECTION AFTER INSTALLATION ................ 82
CAMSHAFT ............................................................... 84
Components ........................................................... 84
Removal and Installation ........................................ 85
REMOVAL ........................................................
... 85
INSPECTION AFTER REMOVAL ........................ 86
INSTALLATION .................................................... 89
INSPECTION AFTER INSTALLATION ................ 92
Valve Clearance ...................................................... 93
INSPECTION ....................................................... 93
ADJUSTMENT .................................................... 96
OIL SEAL ......................................................
............ 98
Removal and Installation of Valve Oil Seal ............. 98
REMOVAL ........................................................
... 98
INSTALLATION .................................................... 98
Removal and Installation of Front Oil Seal ............. 99
REMOVAL ........................................................
... 99
INSTALLATION .................................................... 99
Removal and Installation of Rear Oil Seal .............. 99
REMOVAL ........................................................
... 99
INSTALLATION ..................................................100
CYLINDER HEAD .................................................. .101
On-Vehicle Service ...............................................101
CHECKING COMPRESSION PRESSURE .......101
Components .........................................................102Removal and Installation .......................................102
REMOVAL ..........................................................102
INSPECTION AFTER REMOVAL ......................103
INSTALLATION ..................................................104
INSPECTION AFTER INSTALLATION ..............105
Disassembly and Assembly ..................................106
COMPONENTS .................................................106
DISASSEMBLY ..................................................106
ASSEMBLY ........................................................107
Inspection after Disassembly ................................108
VALVE DIMENSIONS ........................................108
VALVE GUIDE CLEARANCE ............................108
VALVE GUIDE REPLACEMENT .......................109
VALVE SEAT CONTACT ....................................110
VALVE SEAT REPLACEMENT ..........................110
VALVE SPRING SQUARENESS ....................... 111
VALVE SPRING DIMENSIONS AND VALVE
SPRING PRESSURE LOAD ..............................112
ENGINE ASSEMBLY ...............................................113
Components (2WD Models) ..................................113
Removal and Installation (2WD Models) ...............113
REMOVAL ..........................................................114
INSTALLATION ..................................................116
INSPECTION AFTER INSTALLATION ..............117
Components (AWD Models) .................................118
Removal and Installation (AWD Models) ..............118
REMOVAL ..........................................................119
INSTALLATION ..................................................121
INSPECTION AFTER INSTALLATION ..............122
CYLINDER BLOCK .................................................123
Components ..........................................................123
Disassembly and Assembly ..................................124
DISASSEMBLY ..................................................124
ASSEMBLY ......................................................
..128
How to Select Piston and Bearing ........................135
DESCRIPTION ..................................................135
HOW TO SELECT PISTON ...............................135
HOW TO SELECT CONNECTING ROD BEAR-
ING .....................................................................136
HOW TO SELECT MAIN BEARING ..................137
Inspection after Disassembly ................................140
CRANKSHAFT END PLAY ................................140
CONNECTING ROD SIDE CLEARANCE .........140
PISTON TO PISTON PIN OIL CLEARANCE .....140
PISTON RING SIDE CLEARANCE ...................141
PISTON RING END GAP ..................................141
CONNECTING ROD BEND AND TORSION .....142
CONNECTING ROD BIG END DIAMETER ......142
CONNECTING ROD BUSHING OIL CLEAR-
ANCE .................................................................142
CYLINDER BLOCK DISTORTION ....................143
MAIN BEARING HOUSING INNER DIAMETER .144
PISTON TO CYLINDER BORE CLEARANCE ..144
CRANKSHAFT MAIN JOURNAL DIAMETER ...145
CRANKSHAFT PIN JOURNAL DIAMETER ......146
CRANKSHAFT OUT-OF-ROUND AND TAPER .146
CRANKSHAFT RUNOUT ..................................146
CONNECTING ROD BEARING OIL CLEAR-

EM-4Revision: 2006 January2006 M35/M45 ROCKER COVER ...................................................199
Components .........................................................199
Removal and Installation ......................................199
REMOVAL ........................................................
.199
INSTALLATION ..................................................201
TIMING CHAIN ........................................................203
Components .........................................................203
Removal and Installation ......................................204
REMOVAL ........................................................
.204
INSPECTION AFTER REMOVAL ......................208
INSTALLATION ..................................................208
INSPECTION AFTER INSTALLATION ..............214
CAMSHAFT .............................................................215
Components .........................................................215
Removal and Installation ......................................215
REMOVAL ........................................................
.215
INSPECTION AFTER REMOVAL ......................216
INSTALLATION ..................................................219
INSPECTION AFTER INSTALLATION ..............221
INSPECTION AFTER INSTALLATION ..............222
Valve Clearance ....................................................222
INSPECTION .....................................................222
ADJUSTMENT ..................................................225
OIL SEAL ................................................................229
Removal and Installation of Valve Oil Seal ...........229
REMOVAL ........................................................
.229
INSTALLATION ..................................................229
Removal and Installation of Front Oil Seal ...........230
REMOVAL ........................................................
.230
INSTALLATION ..................................................230
Removal and Installation of Rear Oil Seal ............231
REMOVAL ........................................................
.231
INSTALLATION ..................................................231
CYLINDER HEAD .................................................. .233
On-Vehicle Service ...............................................233
CHECKING COMPRESSION PRESSURE .......233
Components .........................................................234
Removal and Installation ......................................234
REMOVAL ........................................................
.234
INSPECTION AFTER REMOVAL ......................235
INSTALLATION ..................................................235
Disassembly and Assembly ..................................237
COMPONENTS .................................................237
DISASSEMBLY .................................................237
ASSEMBLY ......................................................
.238
Inspection after Disassembly ................................239
VALVE DIMENSIONS ........................................239
VALVE GUIDE CLEARANCE ............................240
VALVE GUIDE REPLACEMENT .......................240
VALVE SEAT CONTACT ...................................242
VALVE SEAT REPLACEMENT .........................242
VALVE SPRING SQUARENESS .......................243
VALVE SPRING DIMENSIONS AND VALVE
SPRING PRESSURE LOAD .............................243ENGINE ASSEMBLY ...............................................244
Components ..........................................................244
Removal and Installation .......................................244
REMOVAL ..........................................................245
INSTALLATION ..................................................247
INSPECTION AFTER INSTALLATION ..............247
CYLINDER BLOCK .................................................249
Components ..........................................................249
Disassembly and Assembly ..................................250
DISASSEMBLY ..................................................250
ASSEMBLY ........................................................254
How to Select Piston and Bearing ........................259
DESCRIPTION ..................................................259
HOW TO SELECT PISTON ...............................260
HOW TO SELECT CONNECTING ROD BEAR-
ING .....................................................................261
HOW TO SELECT MAIN BEARING ..................262
Inspection after Disassembly ................................266
CRANKSHAFT END PLAY ................................266
CONNECTING ROD SIDE CLEARANCE .........266
PISTON TO PISTON PIN OIL CLEARANCE .....266
PISTON RING SIDE CLEARANCE ...................267
PISTON RING END GAP ..................................267
CONNECTING ROD BEND AND TORSION .....268
CONNECTING ROD BIG END DIAMETER ......268
CONNECTING ROD BUSHING OIL CLEAR-
ANCE .................................................................268
CYLINDER BLOCK DISTORTION ....................269
MAIN BEARING HOUSING INNER DIAMETER .270
PISTON TO CYLINDER BORE CLEARANCE ..270
CRANKSHAFT MAIN JOURNAL DIAMETER ...271
CRANKSHAFT PIN JOURNAL DIAMETER ......272
CRANKSHAFT OUT-OF-ROUND AND TAPER .272
CRANKSHAFT RUNOUT ..................................272
CONNECTING ROD BEARING OIL CLEAR-
ANCE .................................................................273
MAIN BEARING OIL CLEARANCE ...................274
CRUSH HEIGHT OF MAIN BEARING ..............275
CRUSH HEIGHT OF CONNECTING ROD
BEARING ...........................................................275
DRIVE PLATE ....................................................275
SERVICE DATA AND SPECIFICATIONS (SDS) ....276
Standard and Limit ................................................276
GENERAL SPECIFICATIONS ...........................276
DRIVE BELTS ....................................................276
INTAKE MANIFOLD AND EXHAUST MANI-
FOLD .................................................................276
SPARK PLUG ....................................................277
CAMSHAFT AND CAMSHAFT BEARING .........277
CYLINDER HEAD ..............................................279
CYLINDER BLOCK ............................................282
PISTON, PISTON RING AND PISTON PIN ......283
CONNECTING ROD ..........................................284
CRANKSHAFT ...................................................285
MAIN BEARING .................................................287
CONNECTING ROD BEARING .........................288

PRECAUTIONS
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[VQ35DE]PRECAUTIONSPFP:00001
Precautions for Procedures without Cowl Top CoverNBS004MF
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectNBS005RR
NOTE:
This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
Remove and install all control units after disconnecting both battery cables with the ignition knob in the
LOCK position.
Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the
ACC position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the
LOCK position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.
Precautions for Drain Engine Coolant and Engine OilNBS004MH
Drain engine coolant and engine oil when the engine is cooled.
Precautions for Disconnecting Fuel PipingNBS004MI
Before starting work, make sure no fire or spark producing items are in the work area.
Release fuel pressure before disconnecting and disassembly.
After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyNBS004MJ
When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-
structed operations.
Exercise maximum care to avoid damage to mating or sliding surfaces.
PIIB3706J

EM-10
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PREPARATION
Revision: 2006 January2006 M35/M45
Commercial Service ToolsNBS004MP
(Kent-Moore No.)
Tool nameDescription
(—)
Power toolLoosening nuts and bolts
(BT3373-F)
Belt tension gaugeChecking drive belt tension
(—)
TORX socketRemoving and installing drive plate
Size: T55
(—)
Manual lift table caddyRemoving and installing engine
(J24239-01)
Cylinder head bolt wrenchLoosening and tightening cylinder head bolt,
and used with the angle wrench [SST:
KV10112100 (BT8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
(—)
1.Compression gauge
2.AdapterChecking compression pressure
(—)
Spark plug wrenchRemoving and installing spark plug
PBIC0190E
AMA126
PBIC1113E
ZZA1210D
NT583
ZZA0008D
NT047

EM-24
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INTAKE MANIFOLD
Revision: 2006 January2006 M35/M45
INTAKE MANIFOLDPFP:14003
ComponentsNBS004N2
Removal and InstallationNBS004N3
REMOVAL
1. Release fuel pressure. Refer to EC-98, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-45, "
FUEL INJECTOR AND FUEL TUBE" .
4. Loosen mounting bolts and nuts in reverse order as shown in
the figure to remove intake manifold with power tool.
5. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
1. Harness bracket 2. Intake manifold 3. Gasket
SBIA0487E
PBIC0778E

OIL PAN AND OIL STRAINER
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Revision: 2006 January2006 M35/M45
OIL PAN AND OIL STRAINERP F P : 1111 0
Components (2WD Models)NBS004N6
Removal and Installation (2WD Models)NBS004N7
REMOVAL
CAUTION:
To avoid the danger of being scalded, never drain engine oil when the engine is hot.
NOTE:
When removing oil pan (lower) only, steps 2 to 6 are not necessary. Perform step 22 after completing step 7.
1. Remove front and rear engine undercover with power tool.
2. Remove front tire.
1. Oil pan gasket (rear) 2. Oil pan (upper) 3. O-ring
4. Oil pan gasket (front) 5. Oil filter 6. Connector bolt
7. Oil cooler 8. O-ring 9. Relief valve
10. Oil pressure switch 11. Bracket 12. Oil strainer
13. Drain plug 14. Drain plug washer 15. Oil pan (lower)
16. Baffle plate 17. Rear plate cover 18. Crankshaft position sensor (POS)
19. Seal rubber 20. Rear cover plate
PBIC3877E