2004 INFINITI FX35 length

ENGINE CONTROL SYSTEM
EC-679
[VK45DE]
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Revision: 2004 November 2004 FX35/FX45
Multiport Fuel Injection (MFI) SystemABS00BZ6
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor (POS), camshaft
position sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
3
Piston position
Fuel injection
& mixture ratio
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
ABS actuator and electric unit (control unit)*
2VDC/TCS operation command
Air conditioner switch*
2Air conditioner operation
Wheel sensor*
2Vehicle speed

EC-720
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
DIAGNOSTIC TEST MODE I — BULB CHECK
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to DI-
39, "WARNING LAMPS" or see EC-1318 .
DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING
These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)
DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MIL
illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-
tified codes can be identified by using the CONSULT-II or GST. A DTC will be used as an example for how to
read a code.
A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated
by the number of ten flashes. The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds
consisting of an ON (0.6-second) - OFF (0.6-second) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See EC-662, "
INDEX FOR DTC" )
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to EC-
719, "How to Erase Diagnostic Test Mode II (Self-diagnostic Results)" .

If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.

Be careful not to erase the stored memory before starting trouble diagnoses.
DIAGNOSTIC TEST MODE II — HEATED OXYGEN SENSOR 1 MONITOR
In this mode, the MIL displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1.
MIL Condition
ON When the malfunction is detected.
OFF No malfunction.
PBIA3905E

EC-1254
[VK45DE]
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Revision: 2004 November 2004 FX35/FX45
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)PFP:14956
DescriptionABS00CED
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the
effective suction port length is equivalent to the total length of the intake manifold collector's suction port
including the intake valve. This long suction port provides increased air intake which results in improved suc-
tion efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is running at high speed, the ECM sends the
signal to the VIAS control solenoid valve. This signal introduces the intake manifold vacuum into the power
valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided indepen-
dently for each cylinder. This shortened port length results in enhanced engine output with reduced suction
resistance under high speeds.
The power valve is always open regardless of the engine speed when gear position is in N or P.
Sensor Input signal to ECM ECM function Actuator
Mass air flow sensor Amount of intake air
VIAS control VIAS control solenoid valve Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Engine coolant temperature sensor Engine coolant temperature
PBIB1876E

EC-1274
[VK45DE]
INJECTOR CIRCUIT
Revision: 2004 November 2004 FX35/FX45
INJECTOR CIRCUITPFP:16600
Component DescriptionABS00CEO
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeABS00CEP
Specification data are reference values.
SEF375Z
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL See EC-780, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
INJ PULSE-B1
INJ PULSE-B2

Engine: After warming up

Air conditioner switch: OFF

Shift lever: N

No loadIdle 2.3 - 2.9 msec
2,000 rpm 2.3 - 2.9 msec

EM-22
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Revision: 2004 November 2004 FX35/FX45
INSTALLATION
Note to the following, and install in the reverse order of removal.
Part Installation Direction
Referring to front marks, install parts shown in figure.
Intake Manifold Collector (Lower)
Tighten in numerical order as shown in the figure.
NOTE:
Tighten mounting bolts to secure gasket (lower), intake manifold col-
lector (lower), gasket (upper), and intake manifold collector cover.
Intake Manifold Collector (Upper)

If stud bolts were removed, install them and tighten to the speci-
fied torque below.

Shank length under bolt head varies with bolt location. Install
bolts while referring to numbers shown below and in figure. (Bolt
length does not include pilot portion.)

Tighten in numerical order as shown in the figure.
Water Hose

Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
PBIC0776E
PBIC0774E
: 5.9 N·m (0.6 kg-m, 52 in-lb)
Bolt
M6 × 25 mm (0.98 in) : 7, 8, 10, 11, 13, 14, 15, 16, 18
M6 × 45 mm (1.77 in) : 2, 4, 5
M6 × 60 mm (2.36 in) : 1, 3, 6, 9
M6 Nut : 12, 17
PBIC0773E

EM-58
[VQ35DE]
FRONT TIMING CHAIN CASE
Revision: 2004 November 2004 FX35/FX45
28. Use a scraper to remove all traces of liquid gasket from water
pump cover, chain tensioner cover and intake valve timing con-
trol covers.
INSTALLATION
1. Install timing chain and related parts. Refer to EM-63, "TIMING CHAIN" .
2. Hammer dowel pins (left and left) into front timing chain case up
to a point close to taper in order to shorten protrusion length.
3. Install front oil seal on front timing chain case.

Apply new engine oil to the oil seal edges.

Install it so that each seal lip is oriented as shown in the fig-
ure.

Using suitable drift, press-fit oil seal until it becomes flush with
front timing chain case end face.

Make sure the garter spring is in position and seal lip is not
inverted.
SEM926E
PBIC1101E
SEM715A
PBIC0790E

EM-60
[VQ35DE]
FRONT TIMING CHAIN CASE
Revision: 2004 November 2004 FX35/FX45

Apply liquid gasket to top surface of oil pan (upper) as shown
in the figure with tube presser [SST: WS39930000 ( – )].
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS".
c. Install new O-rings on rear timing chain case.
d. Assemble front timing chain case as follows.
i. Fit lower end of front timing chain case tightly onto top face of oil
pan (upper). From the fitting point, make entire front timing chain
case contact rear timing chain case completely.
CAUTION:
Be careful that oil pan gasket is in place.
ii. While pressing front timing chain case from its front and top as
shown in the figure, install bolts and temporarily tighten them.
For bolt length and positions, refer to the step 6.
iii. Hammer dowel pin until the outer end becomes flush with sur-
face.
6. Tighten bolts to the specified torque in order as shown in the fig-
ure.

After tightening, retighten them to specified torque in numeri-
cal order as shown in the figure.
PBIC1099E
SBIA0497E
PBIC1100E
PBIC1115E
8 mm (0.31 in) dia. bolts : 1, 2
: 28.4 N·m (2.9 kg-m, 21 ft-lb)
6 mm (0.24 in) dia. bolts : Except the above
: 12.7 N·m (1.3 kg-m, 9 ft-lb)
KBIA1303E

TIMING CHAIN
EM-73
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45

Apply liquid gasket on installation position of water pump and cylinder head very completely.
5. Align rear timing chain case and water pump assembly with dowel pins (right and left) on cylinder block
and install case.

Make sure O-rings stay in place during installation to cylinder block and cylinder head.
a. Tighten mounting bolts in the numerical order as shown in the
figure.

There are two bolt lengths used. Follow the below for proper
bolt length specifications.
b. After all bolts are temporarily tightened, retighten them to the
specification in the numerical order as shown in the figure.

If RTV Silicone Sealant protrudes, wipe it off immediately.Bolt length: Bolt position
20 mm (0.79 in) : 1, 2, 3, 6, 7, 8, 9, 10
16 mm (0.63 in) : Except the above
: 12.7 N·m (1.3 kg-m, 9 ft-lb)
PBIC1131E
SEM735G