Nissan Frontier D22. Manual - part 378

 

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Nissan Frontier D22. Manual - part 378

 

 

BASIC SERVICE PROCEDURE

EC-615

[VG33E]

C

D

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EC

20. 

DETECT MALFUNCTIONING PART

Check the following.

1.

Connect heated oxygen sensor 1 harness connectors to heated oxygen sensors 1.

2.

Check fuel pressure regulator. Refer to 

EC-617

 .

3.

Check mass air flow sensor and its circuit. Refer to 

EC-720

 .

4.

Check injector and its circuit. Refer to 

EC-1140

 .

Clean or replace if necessary.

5.

Check engine coolant temperature sensor and its circuit. Refer to 

EC-738

 .

6.

Check ECM function by substituting another known-good ECM.
(ECM may be the cause of an incident, but this is a rare case.)

>> GO TO 2.

Fast Idle Cam (FIC) Inspection and Adjustment

UBS00DET

OPERATION PROCEDURE

With CONSULT-II

1.

 Turn ignition switch ON.

2.

See “COOLAN TEMP/S” in “DATA MONITOR” mode with CON-
SULT-II.

3.

When engine coolant temperature is 20 to 30

°C (68 to 86°F),

make sure that the center of mark A  is aligned with mark B  as
shown in the figure.

If NG, adjust by turning adjusting screw.

4.

Start engine and warm it up.

5.

When engine coolant temperature is 75 to 85

°C (167 to 185°F),

check the following.

The center of mark A  is aligned with mark C .

The cam follower lever's roller is not touching the fast idle
cam.

If NG, replace thermo-element and perform the above inspection
and adjustment again.

 With GST

1.

Turn ignition switch ON.

SEF013Y

Lock nut

: 0.98 - 1.96 N·m (10 - 20 kg-cm, 8.7 - 17.4 in-lb)

SEF970R

SEF971R

EC-616

[VG33E]

BASIC SERVICE PROCEDURE

2.

Check voltage between ECM terminal 59 (Engine coolant tem-
perature sensor signal) and ground.

3.

When the voltage is between 3.12 to 3.52V, make sure that the
center of mark A  is aligned with mark B  as shown in the figure.

If NG, adjust by turning adjusting screw.

4.

Start engine and warm it up.

5.

When the voltage is between 1.10 to 1.36V, check the following.

The center of mark A  is aligned with mark C .

The cam follower lever's roller is not touching the fast idle
cam.

If NG, replace thermo-element and perform the above inspection
and adjustment again.

Fuel Pressure Check

UBS00DEU

FUEL PRESSURE RELEASE

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel
pressure.

5.

Turn ignition switch OFF.

SEF774U

Lock nut

: 0.98 - 1.96 N·m (10 - 20 kg-cm, 8.7 - 17.4 in-lb)

SEF970R

SEF971R

SEF214Y

BASIC SERVICE PROCEDURE

EC-617

[VG33E]

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EC

 Without CONSULT-II

1.

Remove fuel pump fuse located in fuse box.

2.

Start engine.

3.

After engine stalls, crank it two or three times to release all fuel
pressure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

NOTE:

Use Fuel Pressure Gauge Kit J-44321 to check fuel pressure.

Do not perform fuel pressure check with electrical system operating (i.e. lights, A/C etc.). Fuel
pressure gauge may indicate false readings due to varying engine loads and changes in manifold
vacuum.

1.

Release fuel pressure to zero.

2.

Install the inline fuel quick disconnect fitting between the con-
nection of the fuel feed hose (from tank) and the fuel hose (to
engine).

3.

Connect the fuel pressure test gauge (quick connect adapter
hose) to the quick disconnect fitting.

4.

Turn ignition switch ON and check for fuel leakage.

5.

Start engine and check for fuel leakage.

6.

Read the indication of fuel pressure gauge.

If results are unsatisfactory, perform Fuel Pressure Regulator Check.

Fuel Pressure Regulator Check

UBS00DEV

1.

Stop engine and disconnect fuel pressure regulator vacuum
hose from intake manifold.

2.

Plug intake manifold with a blind cap.

3.

Connect variable vacuum source to fuel pressure regulator.

SEF164X

At idling:

With vacuum hose con-
nected

Approximately 235 kPa 

(2.4 kg/cm

2

 , 34 psi)

With vacuum hose dis-
connected

Approximately 294 kPa 

(3.0 kg/cm

2

 , 43 psi)

WEC875

SEF928U

EC-618

[VG33E]

BASIC SERVICE PROCEDURE

4.

Start engine and read indication of fuel pressure gauge as vac-
uum is changed.

Fuel pressure should decrease as vacuum increases. If results
are unsatisfactory, replace fuel pressure regulator.

SEF718BA

 

 

 

 

 

 

 

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