sensor INFINITI FX35 2008 Service Manual

CYLINDER HEADEM-227
< SERVICE INFORMATION > [VK45DE]
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 If the engine speed is out of specified range, check
battery liquid for proper gravity. Check engine speed
again with normal battery gravity.
 If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, pi ston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
 If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the piston rings and replace if necessary.
- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal- functioning. Check valves for damage. Repl ace valve or valve seat accordingly.
 If two adjacent cylinders have respectively low compression pressure and their compression remains low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-666, "
Trouble Diagnosis Introduction".
ComponentINFOID:0000000001325797
Removal and InstallationINFOID:0000000001325798
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-237, "Component".
2. Remove exhaust manifold. Refer to EM-179, "
Component".
3. Remove camshaft. Refer to EM-211, "
Component".
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2756E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-238
< SERVICE INFORMATION >[VK45DE]
ENGINE ASSEMBLY
1. Release fuel pressure. Refer to
EC-665, "Fuel Pressure Check".
2. Drain engine coolant from radiator. Refer to CO-37, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
3. Disconnect both battery terminal. Refer to SC-4, "
How to Handle 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 wh ere they are exposed to magnetism.
5. Remove the following parts:  Hood assembly: Refer to BL-13, "
Fitting Adjustment".
 Engine cover: Refer to EM-169
.
 Front and rear engine undercover
 Air duct (inlet), air duct and air cleaner case assembly: Refer to EM-173, "
Component".
 Drive belts: Refer to EM-170, "
Component".
 Radiator and radiator hoses (upper and lower): Refer to CO-40, "
Component".
 Front road wheels and tires
Engine Room LH
1. Disconnect engine room harness from the engine side and set it aside for easier work.
2. Disconnect heater hoses, and install plugs to avoid leakage of engine coolant.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Discharge refrigerant from A/C circuit. Refer to ATC-120, "
HFC-134a (R-134a) Service Procedure".
6. Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to AT C -
121, "Component".
Engine Room RH
1. Disconnect fuel feed hose and EVAP hose. Refer to EM-190, "Component".
CAUTION:
Fit plugs onto disconnected hose to prevent fuel leak.
2. Disconnect engine room harness from the engine side and set it aside for easier work.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Disconnect reservoir tank of power steering oil pum p from engine, and move it aside for easier work.
CAUTION:
When temporarily securing, keep reservoir tank upright to avoid a fluid leak.
Vehicle Underbody
1. Remove front cross bar. Refer to FSU-5, "On-Vehicle Inspection and Service".
2. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope for eas-
ier work. Refer to PS-29, "
Removal and Installation (VK45DE Models)".
3. Remove A/T fluid cooler tube. Refer to AT-241, "
Removal and Installation (2WD Models)".
4. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
Checking Exhaust Sys-
tem".
5. Remove RH and LH transverse link mounting bolts and nuts. Refer to FSU-13, "
Removal and Installation".
6. Disconnect stabilizer connecting rod lower. Refer to FSU-5, "
On-Vehicle Inspection and Service".
7. Remove A/T control rod at control device assembly side. Then temporarily secure it on transmission, so
that it does not sag. Refer to AT-205, "
Control Device Removal and Installation".
8. Remove rear plate cover from oil pan. Then remove bolts fixing drive plate to torque converter. Refer to EM-183, "
Component" and AT-241, "Removal and Installation (2WD Models)".
9. Remove transmission joint bolts which pierce at oil pan lower rear side. Refer to AT-241, "
Removal and
Installation (2WD Models)".
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CYLINDER BLOCKEM-241
< SERVICE INFORMATION > [VK45DE]
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CYLINDER BLOCK
ComponentINFOID:0000000001325803
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
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
PBIC4691E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-242
< SERVICE INFORMATION >[VK45DE]
CYLINDER BLOCK
 Refer to
GI-8, "Component" for symbols in the figure.
Disassembly and AssemblyINFOID:0000000001325804
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 separa te front suspension member, transmission and front
final drive from engine. Refer to EM-237, "
Component".
2. Remove the parts that may restrict installation of engine to widely use engine stand. NOTE:
The procedure is described assuming that you use wi dely 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 engine 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 240 kg ( 529 lb) or more] large enough for
supporting the engine weight.
 If the load capacity of stand is not adequate, remo ve the following parts beforehand to reduce the poten-
tial risk of overturning stand.
- Intake manifolds (upper and lower): Refer to EM-175, "
Component".
- Exhaust manifold: Refer to EM-179, "
Component".
- Fuel tube and fuel injector assembly: Refer to EM-190, "
Component".
22. Main bearing 23. Rear plate 24. Crankshaft
25. Pilot converter 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
A.Refererence: Installed on transmis-
sion B. Refer to
EM-242
C. Right bank
D. Cylinder block heater (For Canada) E. Chamfered F. Crankshaft side : Engine front
PBIC1656E
PBIC2367E
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CYLINDER BLOCKEM-243
< SERVICE INFORMATION > [VK45DE]
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- A/C compressor: Refer to
ATC-121, "Component".
- Ignition coil: Refer to EM-187, "
Component".
- Rocker cover: Refer to EM-196, "
Component".
- 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-24, "
Changing Engine Oil".
5. Drain engine coolant from inside engine by removing water drain plugs “B” as shown in the figure.
6. Remove the following parts and related parts (The parts listed in step 3 are not included here).  Oil pan and oil strainer: Refer to EM-183, "
Component".
 Crankshaft pulley, front cover and timing chain: Refer to EM-199, "
Component".
 Camshaft: Refer to EM-211, "
Component".
 Cylinder head: Refer to EM-226, "
On-Vehicle Service".
7. Remove knock sensor. CAUTION:
Carefully handle sensor, avoiding shocks.
8. Remove piston and connecting rod assembly as follows:  Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
EM-256, "
Inspection After Disassembly".
a. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b. Remove connecting rod bearing cap.
c. Using hammer handle or similar tool, push piston and connect- ing rod assembly out to the cylinder head side.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interf erence of the connecting rod big
end.
9. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
Identify installation po sitions, and store them without mixing them up.
PBIC0085E
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EM-250
< SERVICE INFORMATION >[VK45DE]
CYLINDER BLOCK
c. Then tighten all connecting rod nuts 60 degrees clockwise.
(Angle tightening)
CAUTION:
Use angle wrench (SST) to ch eck tightening angle. Do not
make judgment by visual inspection.
 After tightening connecting rod nuts, make sure that crank-
shaft rotates smoothly.
 Check the connecting rod side clearance. Refer to EM-256,
"Inspection After Disassembly".
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 rightbank.
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 bac k surface of knock sensor.
 Make sure that knock sensor does not interfere with other parts.
17. Note the following, and assemble in the re verse 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.
- 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.
CAUTION:
Make sure that guide pin is installed at the rear end of
crankshaft.
How to Select Piston and BearingINFOID:0000000001325805
DESCRIPTION
: 14.7 N·m (1.5 kg-m, 11 ft-lb)
PBIC0104E
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FAX-4
< SERVICE INFORMATION >[2WD]
FRONT WHEEL HUB AND KNUCKLE
FRONT WHEEL HUB AND KNUCKLE
On-Vehicle InspectionINFOID:0000000001327506
Make sure the mounting conditions (looseness, back
lash) of each component and component status (wear,
damage) are normal.
WHEEL BEARING INSPECTION
 Move wheel hub in the axial direction by hand. Che ck that there is no looseness of front wheel bearing.
 Rotate wheel hub and make sure there is no unusual noi se or other irregular conditions. If there are any
irregular conditions, replace wheel hub and bearing assembly.
Removal and InstallationINFOID:0000000001327507
COMPONENTS
REMOVAL
1. Remove tires from vehicle with power tool.
2. Remove brake caliper with power tool. Hang it in a place where it will not interfere with work. Refer to BR-
18.
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
3. Put alignment marks on disc rotor and wheel hub and bearing assembly, then remove disc rotor.
4. Remove wheel sensor from wheel hub and bearing assembly. Refer to BRC-52
.
CAUTION:
Do not pull on wheel sensor harness.
5. Remove cotter pin at steering outer socket, then loosen mount- ing nut.Axial end play : 0.05 mm (0.002 in) or less
1. Disc rotor 2. Wheel hub and bearing assembly 3. Splash guard
4. Steering knuckle 5. Cotter pin
Refer to
GI-8, "
Component", for the symbols in the figure.
PDIA1216E
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FRONT WHEEL HUB AND KNUCKLEFAX-5
< SERVICE INFORMATION > [2WD]
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6. Use a ball joint remover (SST) to remove steering outer socket from steering knuckle. Be careful not to damage ball joint boot.
CAUTION:
Tighten temporarily mounting nut to prevent damage to
threads and to prevent ball jo int remover (SST) from com-
ing off.
7. Remove cotter pin at transve rse link, then loosen mounting nut.
8. Use a ball joint remover (SST) to remove transverse link from steering knuckle. Be careful not to damage ball joint boot.
CAUTION:
Tighten temporarily mounting nut to prevent damage to
threads and to prevent ball jo int remover (SST) from com-
ing off.
9. Remove fixing bolts and nuts between strut assembly and steer- ing knuckle with power tool.
10. Remove steering knuckle from vehicle.
11. Remove fixing bolts between steering knuckle and wheel hub and bearing assembly with power tool.
12. Remove splash guard and wheel hub and bearing assembly from steering knuckle.
INSPECTION AFTER REMOVAL
Check for deformity, cracks and damage on each parts, replace if necessary.
Ball Joint Inspection
 Check for boot breakage, axial looseness, and torque of transverse link and steering outer socket ball joint.
Refer to FSU-13
, PS-17.
INSTALLATION
 Refer to "Removal and Installation" for tightening torque. Install in the reverse order of removal.
NOTE:
Refer to component parts location and do not reuse non-reusable parts.
 After removing/installing or replacing axle components, check wheel alignment. Refer to FSU-5, "
Wheel
Alignment Inspection".
 After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-8, "
Adjust-
ment of Steering Angle Sensor Neutral Position".
 Check the following item after service
- Installation condition of wheel sensor harness
SDIA1434E
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FRONT WHEEL HUB AND KNUCKLEFAX-11
< SERVICE INFORMATION > [AWD]
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FRONT WHEEL HUB AND KNUCKLE
On-Vehicle InspectionINFOID:0000000001327513
Make sure the mounting conditions (looseness, ba ck lash) of each component and component status (wear,
damage) are normal.
WHEEL BEARING INSPECTION
 Move wheel hub in the axial direction by hand. Che ck that there is no looseness of front wheel bearing.
 Rotate wheel hub and make sure there is no unusual noise or other irregular conditions. If there are any irregular conditions, replace wheel hub and bearing assembly.
Removal and InstallationINFOID:0000000001327514
COMPONENTS
REMOVAL
1. Remove tires from vehicle with power tool.
2. Remove brake caliper with power tool. Hang it in a place where it will not interfere with work. Refer to BR-
19, "Removal and Installation of Brake Caliper Assembly".
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
3. Put alignment marks on disc rotor and wheel hub and bearing assembly, then remove disc rotor.
4. Remove wheel sensor from steering knuckle. Refer to BRC-52
CAUTION:
Do not pull on wheel sensor harness.
Axial end play : 0.05 mm (0.002 in) or less
1. Cotter pin 2. Washer 3. Disc rotor
4. Wheel hub and bearing assembly 5. Splash guard 6. Steering knuckle
Refer to
GI-8, "
Component", for the symbols in the figure.
PDIA1217E
SDIA1480E
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FRONT DRIVE SHAFTFAX-13
< SERVICE INFORMATION > [AWD]
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FRONT DRIVE SHAFT
On-Vehicle InspectionINFOID:0000000001327515
 Check drive shaft mounting point and joint for looseness and other damage.
 Check boot for cracks and other damage. CAUTION:
Replace entire drive shaft assembly when noi se or vibration occur from drive shaft.
DRIVE SHAFT BOOT REPLACEMENT
1. Remove tires from vehicle with power tool.
2. Remove undercover with power tool.
3. Remove cotter pin. Then remove lock nut from drive shaft with power tool.
4. Remove wheel sensor harness fr om strut assembly. Refer to BRC-52
.
CAUTION:
Do not pull on wheel sensor harness.
5. Remove brake hose lock plate. Then remove brake hose from strut assembly. Refer to BR-10
.
6. Remove fixing bolts and nuts between strut assembly and steering knuckle with power tool.
7. Remove drive shaft from wheel hub and bearing assembly.
8. Using a puller (suitable tool), remove drive shaft from steering knuckle.
CAUTION:
When removing drive shaf t, do not apply an excessive
angle to drive shaft joint. Al so be careful not to excessively
extend slide joint.
9. Remove boot bands, and then remove boot from joint sub-assembly.
10. Screw a drive shaft puller (suitable tool) into joint sub-assembly screw part to a length of 30 mm (1.18 in) or more. Support drive
shaft with one hand and pull out joint sub-assembly with a slid-
ing hammer (suitable tool) from shaft.
CAUTION:
• Align a sliding hammer and drive shaft and remove them
by pulling firmly and uniformly.
 If joint sub-assembly cannot be pulled out, try after
removing drive shaft from vehicle.
11. Remove the circular clip from shaft.
12. Remove boot from shaft.
13. Clean the old grease on joint sub-assembly with paper towels.
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