INFINITI FX35 2006 Service Manual

AIR CLEANER AND AIR DUCT EM-177
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Revision: 2006 December 2006 FX35/FX45
AIR CLEANER AND AIR DUCTPFP:16500
ComponentsNBS003HU

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003HV
REMOVAL
1. Remove engine cover with power tool. Refer to EM-173, "ENGINE ROOM COVER" .
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), power duct, air cleaner case and mass air flow sensor assembly, air duct and res- onator assembly disconnecting their joints.

Add marks as necessary for easier installation.
5. Remove mass air flow sensor from air cleaner case. CAUTION:
Handle mass air flow sensor with following cares.

Do not shock it.

Do not disassemble it.
1. Power duct 2. Blind plug 3. Clip
4. Air duct (inlet) 5. Air cleaner case 6. Mounting rubber
7. Resonator 8. Air cleaner filter 9. Air cleaner case
10. O-ring 11. Mass air flow sensor 12. Air duct and resonator assembly
13. Vacuum hose 14. PCV hose
A. To VIAS control solenoid valve B. To rocker cover (left bank)
PBIC4551E

EM-178
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AIR CLEANER AND AIR DUCT
Revision: 2006 December 2006 FX35/FX45

Do not touch its sensor.
INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for crack or tear.

If anything found, replace air duct and resonator assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.

Align marks. Attach each joint. Screw clamps firmly.
Changing Air Cleaner FilterNBS003HW
REMOVAL
1. Remove air duct (inlet), power duct, air cleaner case and mass air flow sensor assembly.
2. Remove air cleaner filter from air cleaner case.
INSTALLATION
Install in the reverse order of removal.

INTAKE MANIFOLD EM-179
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Revision: 2006 December 2006 FX35/FX45
INTAKE MANIFOLDPFP:14003
ComponentsNBS004LX
PBIC4555E

EM-180
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INTAKE MANIFOLD
Revision: 2006 December 2006 FX35/FX45

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004LY
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
1. Remove engine cover with power tool.
2. Release fuel pressure. Refer to EC-746, "
FUEL PRESSURE RELEASE" .
3. Remove air duct (inlet), power duct, air cleaner case and air duct and resonator assembly. Refer to EM-
177, "AIR CLEANER AND AIR DUCT" .
4. Drain engine coolant from radiator. Refer to CO-38, "
DRAINING ENGINE COOLANT" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
1. PCV tube 2. PCV hose 3. PCV hose
4. Engine cover bracket (RH) 5. EVAP canister purge control sole-
noid valve 6. EVAP hose
7. EVAP service port 8. EVAP tube 9. Vacuum hose
10. Vacuum hose 11. PCV hose 12. PCV tube
13. PCV hose 14. PCV hose 15. Water hose
16. EVAP hose 17. Water hose 18. Intake manifold adapter
19. Gasket 20. Electric throttle control actuator 21. Gasket
22. Gasket 23. Intake manifold (lower) 24. Vacuum hose
25. VIAS control solenoid valve 26. Vacuum hose 27. Vacuum hose
28. Vacuum tank 29. Vacuum hose 30. Engine cover bracket (LH)
31. Vacuum hose 32. Water hose 33. Gasket
34. Intake manifold (upper)
A. To centralized under-floor piping B. To rocker cover (right bank) C. To rocker cover (left bank)
D. To thermostat housing E. To air duct and resonator assembly F. To heater pipe
PBIC4553E

INTAKE MANIFOLD EM-181
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Revision: 2006 December 2006 FX35/FX45
5. Disconnect fuel feed hose quick connector on engine side. Refer to EM-194, "
FUEL INJECTOR AND FUEL TUBE" .
6. Remove fuel damper and fuel hose assembly. Refer to EM-194, "
FUEL INJECTOR AND FUEL TUBE" .
CAUTION:

While hoses are disconnected, plug them to prevent fuel from draining.

Do not separate fuel damper and fuel hose.
7. Remove or disconnect harnesses, engine cover bracket (RH and LH), vacuum hose, EVAP tube and hose and PCV hose and tube from intake manifold (upper).
8. Loosen mounting bolts in reverse order as shown in the figure to remove intake manifold (upper) with power tool.
9. Remove electric throttle control actuator as follows:
a. Disconnect harness connector.
b. Loosen mounting bolts diagonally. CAUTION:

Handle carefully to avoid any shock to electric throttle control actuator.

Do not disassemble.
10. Remove fuel injector and fuel tube assembly. Refer to EM-194, "
FUEL INJECTOR AND FUEL TUBE" .
11. Disconnect water hoses from intake manifold adaptor.
12. Loosen mounting bolts in reverse order as shown in the figure to remove intake manifold (lower) with power tool.
13. Remove intake manifold adaptor from intake manifold (lower).
14. Remove intake manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
PBIC4552E
: Engine front
PBIC3297E
: Engine front
PBIC3298E

EM-182
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INTAKE MANIFOLD
Revision: 2006 December 2006 FX35/FX45
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of both the intake manifold (upper
and lower) mating surfaces with straightedge and feeler gauge.

If it exceeds the limit, replace intake manifolds (lower and/or
upper).
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold (Lower)
Tighten in numerical order as shown in the figure.

There are two types of mounting bolts. Refer to the following for
locating bolts.
Intake Manifold (Upper)
Tighten in numerical order as shown in the figure.
Electric Throttle Control Actuator

Install gasket with its directional protrusion set up/downward.

Tighten mounting bolts of electric throttle control actuator equally and diagonally in several steps.

After installation perform procedure in EM-182, "INSPECTION AFTER INSTALLATION" .
Water Hose
Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
Vacuum Hose
Refer to EC-768, "Vacuum Hose Drawing" .
INSPECTION AFTER INSTALLATION

Perform the “Throttle Valve Closed Position Learning” when harness connector of electric throttle control
actuator is disconnected. Refer to EC-744, "
Throttle Valve Closed Position Learning" .

Perform the “Idle Air Volume Learning” and “Throttle Valve Closed Position Learning” when electric throt-
tle control actuator is replaced. Refer to EC-744, "
Idle Air Volume Learning" .
Limit : 0.1 mm (0.004 in)
PBIC0016E
: Engine front
M8
× 90 mm (3.54 in) : 7, 8
M8 × 35 mm (1.38 in) Except the above
PBIC3298E
: Engine front
PBIC3297E

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-183
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Revision: 2006 December 2006 FX35/FX45
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
ComponentsNBS003HZ

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003I0
REMOVAL
WARNING:
Perform the work, when the exhaust and cooling system have completely cooled down.
1. Remove engine cover with power tool. Refer to EM-173, "
ENGINE ROOM COVER" .
2. Remove front and rear engine undercovers with power tool.
3. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator assembly. Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
4. Remove front cross bar. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
5. Drain engine coolant from radiator. Refer to CO-38, "
Changing Engine Coolant" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
6. Remove radiator. Refer to CO-41, "
RADIATOR" .
1. Air fuel ratio sensor 1 (bank 2) 2. Exhaust manifold cover (right bank) 3. Exhaust manifold (right bank)
4. Gasket 5. Exhaust manifold (left bank) 6. Exhaust manifold cover (left bank)
7. Air fuel ratio sensor 1 (bank 1) 8. Three way catalyst cover (right bank) 9. Three way catalyst (right bank)
10. Heated oxygen sensor 2 (bank 2) 11. Gasket 12. Three way catalyst cover (left bank)
13. Heated oxygen sensor 2 (bank 1) 14. Three way catalyst (left bank) 15. Mounting bracket
16. Mounting bracket
A. Protrusion for installation confirma-
tion.
:Above
PBIC4549E

EM-184
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 December 2006 FX35/FX45
7. Remove drive belts. Refer to EM-174, "DRIVE BELTS" .
8. Remove air fuel ratio sensor 1 and heated oxygen sensor 2 as follows:
a. Disconnect air fuel ratio sensor 1 and heated oxygen sensor 2 harness connectors.
b. Remove air fuel ratio sensor 1 and heated oxygen sensor 2 on both bank with heated oxygen sensor wrench (SST).
CAUTION:

Be careful not to damage air fuel ratio sensor 1 and
heated oxygen sensor 2.

Discard any air fuel ratio sensor 1 and heated oxygen
sensor 2 which have been dropped onto a hard surface
such as a concrete floor; replace with a new one.
9. Remove exhaust mounting bracket between three way catalysts (right and left bank) and transmission. Refer to EX-3, "
EXHAUST SYSTEM" .
10. Disconnect A/C piping from A/C compressor, then remove A/C compressor with power tool. Refer to AT C -
139, "Components" .
11. Remove alternator and bracket. Refer to SC-20, "
CHARGING SYSTEM" .
12. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
13. Remove steering lower joint at power steering gear assembly side, and release steering lower shaft. Refer to PS-17, "
POWER STEERING GEAR AND LINKAGE" .
14. Remove three way catalysts (right and left bank).
15. Remove exhaust manifold covers. (right and left bank)
PBIC2333E
PBIC2334E

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-185
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Revision: 2006 December 2006 FX35/FX45
16. Loosen mounting nuts in reverse order as shown in the figure to remove exhaust manifold.
NOTE:
Disregard the numerical order No. 9 to 12 in removal.
17. Remove exhaust manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the each exhaust manifold flange
mating surface with straightedge and feeler gauge.

If it exceeds the limit, replace exhaust manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket
Install exhaust manifold gasket with its directional protrusion set upward.
Refer to the figure of components on former page. Refer to EM-183, "
Removal and Installation" .
A : Left bank
B : Right bank
: Engine front
PBIC3300E
Limit : 0.3 mm (0.012 in)
PBIC1550E

EM-186
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 December 2006 FX35/FX45
Exhaust Manifold

Install exhaust manifold and tighten mounting nuts in numerical
order as shown in the figure.
NOTE:
Tighten mounting nuts No. 1 to 4 in two steps. The numerical
order No. 9 to 12 shown second steps.
Air Fuel Ratio Sensor and Heated Oxygen Sensor

Install air fuel ratio sensors and heated oxygen sensors in the original position.

Install referring the following if the installation positions cannot
be identified.
CAUTION:

Before installing a new air fuel ratio sensor and heated oxy-
gen sensor, clean exhaust system threads using oxygen
sensor thread cleaner (commercial service tool: J-43897-18
or J-43897-12), and apply anti-seize lubricant (commercial
service tool).

Do not over torque air fuel ratio sensor and heated oxygen sensor. Doing so may cause damage to
the heated oxygen sensor, resulting in “MIL” coming on.
A : Left bank
B : Right bank
: Engine front
PBIC3300E
Glass tube color Air fuel ratio sensor 1 : Black
Heated oxygen sensor 2 : White
PBIC2652E