low oil pressure INFINITI FX35 2004 Repair Manual

DTC P1217 ENGINE OVER TEMPERATURE
EC-1143
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Revision: 2004 November 2004 FX35/FX45
COMPONENT DESCRIPTION
The cooling fan at each speed when the current flows in the cooling fan motor as follows.
CONSULT-II Reference Value in Data Monitor ModeABS00CAR
Specification data are reference values.
On Board Diagnosis LogicABS00CAS
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
This self-diagnosis has the one trip detection logic.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to CO-36, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-26, "Changing Engine Oil" .
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA-13, "
Anti-Freeze Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckABS00CAT
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
Cooling fan speedCooling fan motor terminals
(+) (−)
High (HI) 1 and 2 3 and 4
MONITOR ITEM CONDITION SPECIFICATION
COOLING FAN

Engine: After warming up, idle
the engine

Air conditioner switch: OFFEngine coolant temperature is 94°C
(201°F) or lessOFF
Engine coolant temperature is 95°C
(203°F) or moreHI
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217Engine over tempera-
ture (Overheat)

Cooling fan does not operate properly (Over-
heat).

Cooling fan system does not operate prop-
erly (Overheat).

Engine coolant was not added to the system
using the proper filling method.

Engine coolant is not within the specified
range.

Harness or connectors
(The cooling fan circuit is open or
shorted.)

Cooling fan

Radiator hose

Radiator

Radiator cap

Water pump

Thermostat
For more information, refer to EC-1150,
"Main 12 Causes of Overheating" .

EC-1168
[VK45DE]
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Revision: 2004 November 2004 FX35/FX45
DTC P1446 EVAP CANISTER VENT CONTROL VALVEPFP:14935
Component DescriptionABS00CBK
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows EVAP
Control System diagnosis.
CONSULT-II Reference Value in Data Monitor ModeABS00CBL
Specification data are reference values.
On Board Diagnosis LogicABS00CBM
PBIB1263E
PBIB1522E
MONITOR ITEM CONDITION SPECIFICATION
VENT CONT/V

Ignition switch: ON OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1446
1446EVAP canister vent con-
trol valve closeEVAP canister vent control valve remains
closed under specified driving conditions.

EVAP canister vent control valve

EVAP control system pressure sensor
and the circuit

Blocked rubber tube to EVAP canister
vent control valve

EVAP canister is saturated with water

EM-6
[VQ35DE]
PRECAUTIONS
Revision: 2004 November 2004 FX35/FX45

When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.

Replace with new liquid gasket, packing, oil seal or O-ring.

Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.

Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.

Release air within route when refilling after draining engine coolant.

Before starting engine, apply fuel pressure to fuel lines with turning ignition switch “ON” (with engine
stopped). Then make sure that there are no leaks at fuel line connections.

After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil and
exhaust systems for leakage.
Parts Requiring Angle TighteningABS005ZP

Use an angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap bolts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)

Do not use a torque value for final tightening.

The torque value for these parts are for a preliminary step.

Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketABS005ZQ
REMOVAL OF LIQUID GASKET SEALING

After removing mounting bolts and nuts, separate the mating
surface using a seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown in the figure.

In areas where seal cutter is difficult to use, use plastic hammer
to lightly tap the areas where the liquid gasket is applied.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper, remove old liquid gasket adhering to liquid gas-
ket application surface and the mating surface.

Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe liquid gasket application surface and the mating surface
with white gasoline (lighting and heating use) to remove adher-
ing moisture, grease and foreign materials.
PBIC0002E
PBIC0003E

EM-30
[VQ35DE]
OIL PAN AND OIL STRAINER
Revision: 2004 November 2004 FX35/FX45
OIL PAN AND OIL STRAINERP F P : 1111 0
Removal and InstallationABS004U5
2WD MODEL
REMOVAL
CAUTION:
To avoid the danger of being scalded, never drain engine oil when engine is hot.
NOTE:
To remove oil pan (lower) only, take step 5, then step 20. Removal of step 1, hood assembly (step 2) and step
4 are unnecessary.
1. Remove front tire.
2. Remove hood assembly. Refer to BL-14, "
HOOD" .
3. Remove front and rear engine undercover with power tool.
4. Remove front cross bar with power tool. FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
5. Drain engine oil. Refer to LU-9, "
Changing Engine Oil" .
6. Drain engine coolant. Refer to CO-11, "
Changing Engine Coolant" .
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. Rear plate 17. Crankshaft position sensor (POS) 18. Seal rubber
19. Rear cover plate
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EM-62
[VQ35DE]
FRONT TIMING CHAIN CASE
Revision: 2004 November 2004 FX35/FX45
d. Put a paint mark on crankshaft pulley aligning with angle mark
on crankshaft pulley bolt. Then, further retighten bolt by “60”
degrees (equivalent to one graduation)].
11. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns
smoothly.
12. For the following operations, perform steps in the reverse order of removal.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in the guide may gener-
ate a pounding noise during and just after engine start. However, this is normal. Noise will stop after
hydraulic pressure rises.
INSPECTION AFTER INSTALLATION

Before starting engine, check the levels of engine coolant, lubrications and working fluid. If less than
required quantity, fill to the specified level.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil and working
fluid, fuel and exhaust gas.

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.
Summary of the inspection items:
SEM751G
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Working fluid Level Leakage Level

EM-80
[VQ35DE]
TIMING CHAIN
Revision: 2004 November 2004 FX35/FX45
c. Install collared O-ring in front cover engine oil hole (left and right
sides).
d. Being careful not to move seal ring from the installation groove,
align dowel pins on chain case with the holes to install intake
valve timing control covers.
e. Tighten bolts in the numerical order as shown in the figure.
22. Install crankshaft pulley as follows:
a. Fix crankshaft using ring gear stopper [SST: KV10117700 (J-44716)].
b. Install crankshaft pulley, taking care not to damage front oil seal.

When press-fitting crankshaft pulley with a plastic hammer, tap on its center portion (not circumfer-
ence).
c. Tighten bolt.
d. Put a paint mark on crankshaft pulley aligning with angle mark
on crankshaft pulley bolt. Then, further retighten bolt by “60”
degrees (equivalent to one graduation).
23. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns
smoothly.
24. For the following operations, perform steps in the reverse order of removal.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after engine start. However, this does not indicate an unusualness. Noise
will stop after hydraulic pressure rises.
INSPECTION AFTER INSTALLATION

Before starting engine, check the levels of engine coolant, lubrications and working fluid. If less than
required quantity, fill to the specified level.

Run engine to check for unusual noise and vibration.
PBIC2045E
PBIC0918E
: 44.1 N·m (4.5 kg-m, 33 ft-lb)
SEM751G

CYLINDER HEAD
EM-99
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Revision: 2004 November 2004 FX35/FX45

If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston 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 spark plug hole
of cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check
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. Replace 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, gaskets are leaking. In such a case, replace cylinder head gas-
kets.
9. After inspection is completed, install removed parts.
10. Start engine, and confirm that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer toEC-77, "
TROUBLE DIAGNOSIS" .
Removal and InstallationABS004X8
REMOVAL
1. Remove camshaft. Refer to EM-82, "CAMSHAFT" .
NOTE:
It is also possible to perform the following steps 2 and 3 just before removing camshaft.
2. Temporarily fit front suspension member to support engine.
CAUTION:
Temporary fitting means the status that engine is adequately stable though hoist is released from
hanging.
1. Engine rear lower slinger 2. Cylinder head (left bank) 3. Cylinder head bolt
4. Cylinder head (right bank) 5. Cylinder head gasket (right bank) 6. Cylinder head gasket (left bank)
7. Oil level gauge guide
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ENGINE ASSEMBLY
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Revision: 2004 November 2004 FX35/FX45
REMOVAL
Outline
At first, remove engine and transmission assembly with suspension member downward. Then separate
engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-51, "FUEL PRESSURE RELEASE" .
2. Disconnect both battery terminals.
3. Remove engine cover (Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" ), battery cover and LH/RH
sides front tire.
4. Remove front and rear engine undercover and front cross bar with power tool.
5. Drain engine coolant from radiator drain plug. Refer to CO-11, "
Changing Engine Coolant" .
6. Remove cowl top cover RH. Refer to EI-24, "
COWL TOP" .
7. Remove air duct and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
8. Remove radiator upper and lower hoses. Refer to CO-14, "
RADIATOR" .
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding wire (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable at vehicle side and temporarily fasten it on engine.
4. Disconnect engine room harness connectors shown in the fig-
ure.
5. Disconnect A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose and EVAP hose.
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove power steering oil pump reservoir tank and piping from vehicle, and temporarily secure them on
engine. Refer to PS-31, "
POWER STEERING OIL PUMP" .
CAUTION:
When temporarily securing, keep them upright to avoid a fluid leak.
Passenger Room Side
1. Follow procedure below to disconnect engine room harness connectors at passenger room side, and tem-
porarily secure them on engine.
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ENGINE ASSEMBLY
EM-113
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Revision: 2004 November 2004 FX35/FX45
Separation Work
1. Install engine slingers into front of right bank cylinder head and
rear of left bank cylinder head.
2. Remove power steering oil pump from engine side. Refer to PS-
31, "POWER STEERING OIL PUMP" .
3. Remove engine mounting insulator under side nut with power
tool.
4. Lift with hoist and separate engine and transmission assembly
from suspension member.
CAUTION:

Before and during this lifting, always check if any harnesses are left connected.

Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.
5. Remove alternator. Refer to SC-23, "
CHARGING SYSTEM" .
6. Remove starter motor. Refer to SC-10, "
STARTING SYSTEM" .
7. Separate engine from transmission assembly. Refer to AT- 2 6 6 , "
TRANSMISSION ASSEMBLY" .
8. Remove engine mounting insulator and bracket with power tool.
INSTALLATION
Note to the following, and install in the reverse order of removal.

For a location with a positioning pin, insert it securely into hole of
mating part.

For a part with a specified installation orientation, refer to com-
ponent figure in EM-110, "
2WD MODEL" .

When installing engine mounting bracket on cylinder block,
tighten two upper bolts (shown as A in figure) first. Then tighten
two lower bolts (shown as B in figure). (LH and RH sides)

Tighten rear member mounting bolts in numerical order shown
in figure.
INSPECTION AFTER INSTALLATION

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

Use procedure below to check for fuel leakage.
–Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil, working fluid,
fuel and exhaust gas.Slinger bolts:
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
SBIA0474E
PBIC1134E
KBIA1019E

EM-116
[VQ35DE]
ENGINE ASSEMBLY
Revision: 2004 November 2004 FX35/FX45
Preparation
1. Release fuel pressure. Refer to EC-51, "FUEL PRESSURE RELEASE" .
2. Disconnect both battery terminals.
3. Remove engine cover (Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" ), battery cover and LH/RH
sides front tire.
4. Remove front and rear engine undercover and front cross bar with power tool.
5. Drain engine coolant from radiator drain plug. Refer to CO-11, "
Changing Engine Coolant" .
6. Remove cowl top cover RH. Refer to EI-24, "
COWL TOP" .
7. Remove air duct and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
8. Remove radiator upper and lower hoses. Refer to CO-14, "
RADIATOR" .
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding wire (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable at vehicle side and temporarily fasten it on engine.
4. Disconnect engine room harness connectors shown in the fig-
ure.
5. Disconnect A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose and EVAP hose.
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove power steering oil pump reservoir tank and piping from vehicle, and temporarily secure them on
engine. Refer to PS-31, "
POWER STEERING OIL PUMP" .
CAUTION:
When temporarily securing, keep them upright to avoid a fluid leak.
Passenger Room Side
1. Follow procedure below to disconnect engine room harness connectors at passenger room side, and tem-
porarily secure them on engine.
a. Remove passenger-side kicking plate, dash side finisher, and
glove box. Refer to EI-37, "
BODY SIDE TRIM" and IP-10,
"INSTRUMENT PANEL ASSEMBLY" .
b. Disconnect engine room harness connectors at unit sides ECM
and other.
c. Disengage intermediate fixing point. Pull out engine room har-
nesses to engine room side, and temporarily secure them on
engine.
CAUTION:

When pulling out harnesses, take care not to damage
harnesses and connectors.

After temporarily securing, cover connectors with vinyl or similar material to protect against for-
eign material adhesion.
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