2006 INFINITI M35 Crankshaft Sensor

ENGINE ASSEMBLY
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Revision: 2006 January2006 M35/M45
Always use the support point specified for lifting.
Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.
For supporting points for lifting and jacking point at rear axle, refer to GI-42, "Garage Jack and
Safety Stand and 2-Pole Lift" .
REMOVAL
Outline
At first, remove engine, transmission assembly with front suspension member from vehicle downward. Then
separate engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-809, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-40, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
3. Disconnect both battery cables. Refer to SC-4, "
BATTERY" .
4. Remove crankshaft position sensor (POS) from transmission.
CAUTION:
Handle carefully to avoid dropping and shocks.
Do not disassemble.
Do not allow metal powder to adhere to magnetic part at sensor tip.
Do not place sensors in a location where they are exposed to magnetism.
5. Remove the following parts:
Front and rear engine undercover (power tool)
Air duct (inlet), air duct and air cleaner case assembly; Refer to EM-177, "AIR CLEANER AND AIR
DUCT" .
Front road wheels and tires (power tool)
Engine Room LH
1. Disconnect heater hoses, and install plugs to avoid leakage of engine coolant.
2. Disconnect wire bonding from exhaust manifold cover to vehicle.
3. Disconnect vacuum hose between vehicle and engine and set it aside.
4. Discharge refrigerant from A/C circuit. Refer to ATC-151, "
REFRIGERANT LINES" .
5. Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to AT C -
151, "REFRIGERANT LINES" .
Engine Room RH
1. Disconnect fuel feed hose and EVAP hose. Refer to EM-193, "FUEL INJECTOR AND FUEL TUBE" .
CAUTION:
Fit plugs onto disconnected hose to prevent fuel leak.
2. Disconnect ground cable (between vehicle and right bank cylinder head).
3. Disconnect vacuum hose between vehicle and engine and set it aside.
4. Disconnect reservoir tank of power steering oil pump from engine, and move it aside for easier work.
CAUTION:
When temporarily securing, keep reservoir tank upright to avoid a fluid leak.
Ve h i c le i n s i d e
Follow procedure below to disconnect engine room harness connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, dash side finisher, and glove box. Refer to EI-37, "
BODY SIDE
TRIM" and IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect engine room harness connectors at unit sides TCM, ECM and other.

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
CYLINDER BLOCKPFP:11010
ComponentsNBS004PM
1. Knock sensor sub harness 2. Knock sensor 3. Cylinder block
4. Cover 5. Main bearing 6. Top ring
7. Second ring 8. Oil ring 9. Crankshaft key
10. Piston 11. Connecting rod 12. Snap ring
PBIC2366E

EM-250
[VK45DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
Disassembly and AssemblyNBS004PN
DISASSEMBLY
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, note with difference in steps and etc.
1. Remove engine assembly from vehicle, and separate front suspension member, transmission from
engine. Refer to EM-244, "
ENGINE ASSEMBLY" .
2. Remove the parts that may restrict installation of engine to widely use engine stand.
NOTE:
The procedure is described assuming that you use widely use engine holding the surface, to which trans-
mission is installed.
a. Remove drive plate.
Holding ring gear with ring gear stopper (SST).
Loosen mounting bolts diagonally order.
CAUTION:
Do not disassemble drive plate.
Do not place drive plate with signal plate facing down.
When handling signal plate, take care not to damage or
scratch it.
Handle signal plate in a manner that prevents it from
becoming magnetized.
b. Remove rear plate.
3. Lift engine with hoist to install it onto widely use engine stand.
CAUTION:
Use engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough for
supporting the engine weight.
If the load capacity of stand is not adequate, remove the following parts beforehand to reduce the
potential risk of overturning stand.
–Intake manifolds (upper and lower); Refer to EM-179, "INTAKE MANIFOLD" .
–Exhaust manifold and three way catalyst; Refer to EM-183, "EXHAUST MANIFOLD AND THREE WAY
CATALYST" .
13. Piston pin 14. Connecting rod bearing 15. Connecting rod bearing cap
16. Block heater protector 17. Connector cap 18. Cylinder block heater
19. Gasket 20. Main bearing cap 21. Thrust bearing
22. Main bearing 23. Rear plate 24. Crankshaft
25. Pilot convertor 26. Drive plate 27. Thrust bearing
28. Side bolt 29. Reinforcement plate 30. Crankshaft position sensor (POS)
31. O-ring 32. Rear oil seal 33. Rear oil seal retainer
PBIC1656E
PBIC2367E

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
–Fuel tube and fuel injector assembly; Refer to EM-193, "FUEL INJECTOR AND FUEL TUBE" .
–Ignition coil; Refer to EM-190, "IGNITION COIL" .
–Rocker cover; Refer to EM-199, "ROCKER COVER" .
–Other removable brackets
NOTE:
The figure shows an example of widely use engine stand that
can hold mating surface of transmission with drive plate and rear
plate removed.
CAUTION:
Before removing the hanging chains, make sure the engine
stand is stable and there is no risk of overturning.
4. Drain engine oil. Refer to LU-28, "
Changing Engine Oil" .
5. Drain engine coolant from inside engine by removing water
drain plugs “B” as shown in the figure.
6. Remove oil pan and oil strainer; Refer to EM-187, "
OIL PAN AND OIL STRAINER" .
7. Remove crankshaft pulley as follows:
a. Lock crankshaft with a hammer handle or similar tool to loosen
crankshaft bolt.
b. Pull crankshaft pulley with both hands to remove it.
CAUTION:
Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect removed crank-
shaft pulley from dropping.
Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.
8. Remove the following parts and related parts (The parts listed in step 3 are not included here.)
Front cover and timing chain; Refer to EM-203, "TIMING CHAIN" .
Camshaft; Refer to EM-215, "CAMSHAFT" .
Cylinder head; Refer to EM-233, "CYLINDER HEAD" .
9. Remove knock sensor.
CAUTION:
Carefully handle sensor, avoiding shocks.
10. Remove piston and connecting rod assembly as follows:
Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer
to EM-266, "
CONNECTING ROD SIDE CLEARANCE" .
a. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b. Remove connecting rod bearing cap.
PBIC0085E
PBIC1265E
PBIC0053E

CYLINDER BLOCK
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Revision: 2006 January2006 M35/M45
16. Install knock sensor.
Install it with its connector facing the rear of engine.
Install the sub-harness with its shorter branch line to the right
bank.
CAUTION:
Do not tighten mounting bolts while holding connector.
If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.
Make sure that knock sensor does not interfere with other parts.
17. Note the following, and assemble in the reverse order of disassembly after this step.
Drive plate
When installing drive plate to crankshaft, be sure to correctly
align crankshaft side guide pin and drive plate side guide pin
hole.
CAUTION:
If these are not aligned correctly, engine runs roughly
and “MIL” turns on.
Install drive plate, reinforcement plate and pilot converter (if
not installed in step 4) as shown in the figure.
Face chamfered or rounded edge side to crankshaft.
Holding ring gear with ring gear stopper [SST: J-45476].
Tighten mounting bolts crosswise over several times.
When install pilot converter, using drift [outer diameter:
approx. 35 mm (1.38 in)]. Press-fit as far as it will go.
How to Select Piston and Bearing NBS004PO
DESCRIPTION
PBIC0105E
PBIC0106E
PBIC1965E
Selection points Selection parts Selection items Selection methods
Between cylinder block and
crankshaftMain bearingMain bearing grade
(bearing thickness)Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer
diameter determine connecting
rod bearing selection.
Between cylinder block and pis-
tonPiston and piston pin assembly
(Piston is available together
with piston pin as assembly.)Piston grade
(piston skirt diameter)Piston grade = cylinder bore
grade (inner diameter of bore)
Between piston and connecting
rod*———

TERMINOLOGY
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Revision: 2006 January2006 M35/M45
TERMINOLOGYPFP:00011
SAE J1930 Terminology List NAS00088
All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new
terms, new acronyms/abbreviations and old terms are listed in the following chart.
NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM
Air cleaner ACL Air cleaner
Barometric pressure BARO ***
Barometric pressure sensor-BCDD BAROS-BCDD BCDD
Camshaft position CMP ***
Camshaft position sensor CMPS Crank angle sensor
Canister *** Canister
Carburetor CARB Carburetor
Charge air cooler CAC Intercooler
Closed loop CL Closed loop
Closed throttle position switch CTP switch Idle switch
Clutch pedal position switch CPP switch Clutch switch
Continuous fuel injection system CFI system ***
Continuous trap oxidizer system CTOX system ***
Crankshaft position CKP ***
Crankshaft position sensor CKPS ***
Data link connector DLC ***
Data link connector for CONSULT-II DLC for CONSULT-II Diagnostic connector for CONSULT-II
Diagnostic test mode DTM Diagnostic mode
Diagnostic test mode selector DTM selector Diagnostic mode selector
Diagnostic test mode I DTM I Mode I
Diagnostic test mode II DTM II Mode II
Diagnostic trouble code DTC Malfunction code
Direct fuel injection system DFI system ***
Distributor ignition system DI system Ignition timing control
Early fuel evaporation-mixture heater EFE-mixture heater Mixture heater
Early fuel evaporation system EFE system Mixture heater control
Electrically erasable programmable read
only memoryEEPROM ***
Electronic ignition system EI system Ignition timing control
Engine control EC ***
Engine control module ECM ECCS control unit
Engine coolant temperature ECT Engine temperature
Engine coolant temperature sensor ECTS Engine temperature sensor
Engine modification EM ***
Engine speed RPM Engine speed
Erasable programmable read only memory EPROM ***
Evaporative emission canister EVAP canister Canister
Evaporative emission system EVAP system Canister control solenoid valve
Exhaust gas recirculation valve EGR valve EGR valve

IDX-3
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IDX
ALPHABETICAL INDEX
Camshaft(VQ35DE) ........................................... EM-84
CAN .................................................................... DI-77
CAN - Wiring diagram ......... EC-174, EC-887, AT-106,
LAN-50
, LAN-91, LAN-132, LAN-179, LAN-226,
LAN-277
, LAN-323, LAN-369, LAN-419, LAN-469,
LAN-523
, LAN-566, LAN-609, LAN-658, LAN-707
CAN (Controller Area Network) ... SB-5, BL-26, BL-60,
BL-224
, GW-19, GW-75, GW-97, SE-16
CAN communication ........... EC-173, EC-176, EC-748,
EC-886
, EC-889, AT-32, AT-105, TF-13, TF-32, WT-12,
SB-5
, BL-26, BL-60, BL-224, GW-19, GW-75, GW-97,
SE-16
, WW-11
Canister-See EVAP canister ............... EC-42, EC-752
Center bearing assembly (propeller shaft) ........ PR-12
Center bearing disassembly (propeller shaft) .... PR-11
CHARGE - Wiring diagram ................................ SC-25
Charging system ................................................ SC-23
Chassis and body maintenance ........................ MA-29
CHIME - Wiring diagram ..................................... DI-64
CIGAR - Wiring diagram .................................. WW-49
Cigarette lighter ............................................... WW-49
Circuit breaker ................................................... PG-17
Clock ................................................................. DI-108
CLOCK - Wiring diagram .................................. DI-108
Closed loop control .............................. EC-32, EC-742
Closed loop control (Bank 1) ........... EC-509, EC-1236
Closed loop control (Bank 2) ........... EC-509, EC-1236
Collision diagnosis ........................................... SRS-50
Combination lamp, front, removal and installation ........
LT-76
Combination lamp, rear, removal and installation ........
LT-266
Combination meter ............................................... DI-5
COMPAS - Wiring diagram ............................... DI-106
Compass .......................................................... DI-105
Component Location (auto A/C) ...................... ATC-42
Compression pressure(VK45DE) .................... EM-233
Compression pressure(VQ35DE) .................... EM-101
Compressor special service tool ...................... ATC-16
Condenser ..................................................... ATC-165
Connecting rod bearing clearance(VK45DE) .. EM-273
Connecting rod bushing clearance .................. EM-142
Connecting rod bushing clearance(VK45DE) .. EM-268
Connecting rod(VK45DE) ................................ EM-268
Connecting rod(VQ35DE) ................................ EM-140
CONSULT-II Reference value (A/T) .................. AT-90
Control units (terminal arrangement) ............... PG-104
Control valve (A/T) ............................................. AT-38
Controller Area Network (CAN) ... SB-5, BL-26, BL-60,
BL-224
, GW-19, GW-75, GW-97, SE-16
Converter housing installation ............ AT-274, AT-277
COOL/F - Wiring diagram ................ EC-515, EC-1242
Coolant replacement(VQ35DE) ......................... MA-15
Cooling circuit (engine)(VK45DE) ...................... CO-38
Cooling circuit (engine)(VQ35DE) ....................... CO-9
Cooling fan motor ............ EC-524, EC-1249, EC-1250
Cooling fan(VK45DE) ........................................ CO-51
Cooling fan(VQ35DE) ........................................ CO-22
Cowl top ............................................................... EI-18
Cowl top cover .................................................... EI-18
Crankcase ventilation system - See Positive crankcase
ventilation ............................................. EC-51
, EC-761
Crankshaft position sensor (POS) ... EC-376, EC-1099
Crankshaft(VK45DE) ...................................... EM-250
Crankshaft(VQ35DE) ...................................... EM-140
Crash zone sensor .......................................... SRS-45
CUR/SE - Wiring diagram .. EC-539, EC-545, EC-551,
EC-557
, EC-1265, EC-1271, EC-1277, EC-1283
Cylinder block boring(VK45DE) ...................... EM-271
Cylinder block(VK45DE) ................................. EM-249
Cylinder block(VQ35DE) ................................. EM-123
Cylinder head bolt tightening(VK45DE) .......... EM-235
Cylinder head bolt tightening(VQ35DE) .......... EM-104
Cylinder head(VK45DE) ................................. EM-233
Cylinder head(VQ35DE) ................................. EM-101
D
D/LOCK - Wiring diagram .................................. BL-28
Daytime light system ........................................... LT-79
Daytime running light - See Daytime light system LT-79
DEF - Wiring diagram ............................ SB-7, SE-118
Diagnosis sensor unit ..................................... SRS-48
Diagnostic trouble code (DTC) for OBD system EC-16,
EC-58
, EC-726, EC-769
Direct clutch solenoid valve ............... AT-155, AT-157
Display and amp.assembly ............... ATC-53, ATC-66
Door glass ........................................... GW-63, GW-67
Door glass Fitting Adjustment(Front) ................ GW-66
Door glass Fitting Adjustment(Rear) ................. GW-70
Door lock .......................................................... BL-196
Door mirror ...................................................... GW-120
Door trim ............................................................. EI-34
Door, front ........................................... BL-190, GW-63
Door, rear ............................................ BL-190, GW-67
Drive belt inspection ......................................... MA-22
Drive belt inspection(VQ35DE) ......................... MA-14
Drive belt(VK45DE) ........................................ EM-174
Drive belt(VQ35DE) .......................................... EM-15
Drive shaft ......................................................... MA-38
Drive shaft (rear) ............................................... RAX-8
Driver air bag .................................................. SRS-38
DTRL - Wiring diagram ....................................... LT-84
Duct and grilles .............................................. ATC-144
E
ECM power supply EC-166
, EC-492, EC-879, EC-1211
ECM/PW - Wiring diagram ............... EC-493, EC-1212
ECTS - Wiring diagram ...................... EC-228, EC-950
Electric sunroof .................................................. RF-10
Electric throttle control actuator ........ EC-613, EC-624,
EC-1344
, EC-1356
Electric throttle control actuator (VK45DE) ..... EM-179
Electric throttle control actuator (VQ35DE) ....... EM-19
Electrical load signal circuit .............. EC-697, EC-1439
Electrical unit ................................................... PG-104
Electrical units location ...................................... PG-96

LU-8
[VQ35DE]
ENGINE OIL
Revision: 2006 January2006 M35/M45
Crankshaft oil seals (front and rear)
Camshaft position sensor (PHASE)
OIL PRESSURE CHECK
WAR NING :
Be careful not to get burn yourself, as engine oil may be hot.
Oil pressure check should be done in “Parking position”.
1. Check the engine oil level. Refer to LU-7, "
ENGINE OIL LEVEL" .
2. Remove front engine undercover with power tool.
3. Disconnect harness connector at oil pressure switch, and
remove oil pressure switch using deep socket (commercial ser-
vice tool).
CAUTION:
Do not drop or shock oil pressure switch.
Remove the oil pressure switch using a 26 mm (1.02 in) box
wrench. (AWD models)
4. Install the oil pressure gauge (SST) and hose (SST).
5. Start the engine and warm it up to normal operating temperature.
6. Check the engine oil pressure with engine running under no-load.
NOTE:
When the engine oil temperature is low, the engine oil pressure becomes high.
Engine oil pressure [Engine oil temperature at 80
C (176 F)]
If difference is extreme, check engine oil passage and oil pump for engine oil leaks.
7. After the inspections, install oil pressure switch as follows:
SBIA0452E
SBIA0453E
SLC926
Engine speed (rpm)
Approximate discharge pressure [kPa (kg/cm2 , psi)]
Idle speed More than 98 (1.0, 14)
2,000 More than 294 (3.0, 43)