Vq23de NISSAN TEANA 2003 Owner's Guide

FUEL INJECTOR
EC-689
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EC

9. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors F1, F251

Harness for open or short between fuel injector and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK FUEL INJECTOR
Refer to EC-689, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace fuel injector.
12. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionBBS0056N
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationBBS0056O
FUEL INJECTOR
Refer to EM-155, "FUEL INJECTOR AND FUEL TUBE" . Continuity should exist.
Resistance:
VQ23DE: 13.5 - 17.5 [at 10 - 60°C (50 - 140°F)]
VQ35DE: 11.1 - 14.5 [at 10 - 60°C (50 - 140°F)]
PBIB1727E

EC-754
[VQ]
VIAS

VIAS Control Solenoid Valve
The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is OFF, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.
CONSULT-II Reference Value in Data Monitor ModeBBS00566
Specification data are reference values.
PBIB2108E
MONITOR ITEM CONDITION SPECIFICATION
VIAS S/V

Engine: After warming up1,800 - 3,600 rpm (VQ35DE engine)
1,800 - 3,750 rpm (VQ23DE engine)ON
Except above conditions OFF

EC-756
[VQ]
VIAS

Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
29 Y/G VIAS control solenoid valve[Engine is running]

Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Engine speed:
Between 1,800 and 3,600 rpm
(VQ35DE engine)
Between 1,800 and 3,750 rpm
(VQ23DE engine)0 - 1.0V
111 W / BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
11 9
120R/G
R/GPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)

VIAS
EC-757
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Diagnostic ProcedureBBS00568
1. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CON-
SULT-II.
3. Turn VIAS control solenoid valve ON and OFF, and make sure
that power valve actuator rod moves.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to between 1,800 and 3,600 (VQ35DE), 3,750
(VQ23DE) rpm and make sure that power valve actuator rod
moves.
OK or NG
OK >>INSPECTION END
NG (With CONSULT-II) >>GO TO 2.
NG (Without CONSULT-II) >>GO TO 3.
PBIB0844E
PBIB2472E
PBIB2472E

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-765
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureBBS0057G
Idle Speed and Ignition TimingBBS0057H
*: Under the following conditions:

Air conditioner switch: OFF

Electric load: OFF (Lights, heater fan & rear window defogger)

Steering wheel: Kept in straight-ahead position
Mass Air Flow SensorBBS0057I
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorBBS0057J
Engine Coolant Temperature SensorBBS0057K
Heated Oxygen Sensor 1 HeaterBBS0057L
Heated Oxygen sensor 2 HeaterBBS0057M
Crankshaft Position Sensor (POS)BBS0057N
Refer to EC-523, "Component Inspection" .
Camshaft Position Sensor (PHASE)BBS0057O
Refer to EC-532, "Component Inspection" .
Throttle Control MotorBBS0057P
Fuel InjectorBBS0057Q
Fuel pressure at idling kPa (bar, kg/cm2 , psi)Approximately 350 (3.5, 3.57, 51)
Target idle speed No load* (in P or N position)VQ23DE: 700 ± 50 rpm
VQ35DE: 625 ± 50 rpm
Air conditioner: ONIn P or N position VQ23DE: 750 rpm or more
VQ35DE: 700 rpm or more
Ignition timing In P or N position 15 ± 5° BTDC
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle0.9 - 1.1V (VQ23DE engine)*
1.0 - 1.3V (VQ35DE engine)*
Temperature °C (°F) Resistance kΩ
25 (77)1.800 - 2.200
80 (176)0.283 - 0.359
Temperature °C (°F)Resistance kΩ
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Resistance [at 25°C (77°F)] 3.3 - 4.0Ω
Resistance [at 25°C (77°F)] 5.0 - 7.0Ω
Resistance [at 25°C (77°F)] Approximately 1 - 15Ω
Resistance [at 10 - 60°C (50 - 140°F)]VQ23DE: 13.5 - 17.5Ω
VQ35DE: 11.1 - 14.5Ω

EM-120
[VQ]
PRECAUTIONS


When tightening bolts and nuts, 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 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.

After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Parts Requiring Angle TighteningBBS007TV

Use angle wrench [SST: KV10112100] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap nuts (VQ23DE)
–Connecting rod cap bolts (VQ35DE)
–Crankshaft pulley bolt

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 GasketBBS007TW
REMOVAL OF LIQUID GASKET SEALING

After removing mounting nuts and bolts, separate the mating
surface using 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 (SST) is difficult to use, use plastic
hammer to lightly tap the parts, to remove it.
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 scraper, remove old liquid gasket adhering to the gasket
application surface and the mating surface.

Remove liquid gasket completely from the groove of the gas-
ket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
PBIC0275E
PBIC0003E

INTAKE MANIFOLD COLLECTOR
EM-133
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INTAKE MANIFOLD COLLECTORPFP:14003
Removal and InstallationBBS004VR
1. Bracket 2. Electric throttle control actuator 3. Gasket
4. Intake manifold collector (upper) 5. Intake manifold collector support 6. PCV hose
7. Water hose 8. Vacuum hose 9. Water hose
10. Gasket 11. Harness bracket 12. Vacuum hose
13. VIAS control solenoid valve 14. Power valve 15. Gasket
16. Gasket 17. Intake manifold 18. Gasket
19. Intake manifold collector (lower) 20. Bracket 21.EVAP canister purge volume control
solenoid valve
22. Vacuum hose 23. EVAP hose 24. Vacuum tank
A. To rocker cover (right bank) B. To water outlet C. To heater pipe
D. To brake booster E. To vacuum pipe (EVAP canister) F. VQ23DE
PBIC4580J

EM-134
[VQ]
INTAKE MANIFOLD COLLECTOR


Refer to GI-10, "Components" for symbol marks in the figure.
NOTE:
The figure illustrates VQ35DE as an example. Each part form of VQ23DE is different from VQ35DE for differ-
ence of port diameter and so forth. Only portions which structures (components) differ are illustrated.
REMOVAL
WARNING:
To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
NOTE:
Show VQ35DE as an example unless the figure includes specification.
1. Remove engine cover.
CAUTION:
Be careful not to damage or scratch engine cover.
2. Remove air cleaner case (upper) with mass air flow sensor and air duct assembly. Refer to EM-131, "
AIR
CLEANER AND AIR DUCT" .
3. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-34, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
4. Remove electric throttle control actuator as follows:
a. Disconnect harness connector.
b. Loosen mounting bolts in the reverse order as shown in the fig-
ure.
CAUTION:

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

Do not disassemble.
5. Disconnect water hoses from intake manifold collector (upper).

When engine coolant is not drained from radiator, attach plug to water hoses to prevent engine coolant
leakage.
PBIC2454E
KBIA2007J

INTAKE MANIFOLD COLLECTOR
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6. Remove the following:

Va c u u m h o s e

PCV hose

Power steering hose bracket

Intake manifold collector support

Harness bracket
7. Disconnect vacuum hose, EVAP hose and harness connector from EVAP canister purge volume control
solenoid valve.
8. Remove EVAP canister purge volume control solenoid valve.
9. Remove VIAS control solenoid valve and vacuum tank.

Add mating marks as necessary for easier installation.
10. Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold collectors (upper and
lower) assembly and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
NOTE:
Disregard the numerical order No. 7 to 9 in removal. (VQ23DE)
11. Loosen mounting bolts in the reverse order as shown in the fig-
ure to remove intake manifold collector (upper) from intake man-
ifold collector (lower).
PBIC2455E
PBIC2456E
PBIC2457E
SEM712G

INTAKE MANIFOLD COLLECTOR
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Intake Manifold Collector (Lower)
Tighten mounting nuts and bolts in numerical order as shown in the
figure.
NOTE:
Tighten mounting bolts No. 1, 2 and 4 in two steps. The numerical
order of No. 7, 8 and 9 shows second step. (VQ23DE)
Electric Throttle Control Actuator

Install gasket with positioning no-protrusion surface upward or downward. (VQ35DE)

Tighten mounting bolts in numerical order as shown in the fig-
ure.

Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is discon-
nected. Refer to EC-389, "
Throttle Valve Closed Position
Learning" .

Perform the “Idle Air Volume Learning” and “Throttle Valve
Closed Position Learning” when electric throttle control actuator
is replaced. Refer to EC-389, "
Idle Air Volume Learning" .
PBIC2456E
PBIC2457E
KBIA2007J