Nissan Frontier D22. Instruction — part 528

BASIC SERVICE PROCEDURE

EC-1215

[VG33ER]

C

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EC

18.

PREPARATION FOR CO% CHECK

With CONSULT-II

1.

Select “ENG COOLANT TEMP” in “ACTIVE TEST” mode.

2.

Set “ENG COOLANT TEMP” to 5

°C (41°F) by touching “DWN”

and “Qd”.

Without CONSULT-II

1.

Disconnect engine coolant temperature sensor harness connector.

2.

Connect a resistor (4.4 k

Ω) between terminals of engine coolant

temperature sensor harness connector.

>> GO TO 19.

SEF172Y

PBIB1436E

EC-1216

[VG33ER]

BASIC SERVICE PROCEDURE

19.

CHECK CO%

1.

Start engine and warm it up until engine coolant temperature
indicator points to the middle of gauge.

2.

Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed.

3.

Check CO%.

4.

Without CONSULT-II

After checking CO%,

–

Disconnect the resistor from terminals of engine coolant temper-
ature sensor.

–

Connect engine coolant temperature sensor harness connector
to engine coolant temperature sensor.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 20.

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-1219

.

3.

Check mass air flow sensor and its circuit. Refer to

EC-1327

.

4.

Check injector and its circuit. Refer to

EC-1716

.

Clean or replace if necessary.

5.

Check engine coolant temperature sensor and its circuit. Refer to

EC-1345

.

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

UBS00DRV

OPERATION PROCEDURE

With CONSULT-II

1.

Turn ignition switch ON.

SEF976U

Idle CO: 1.5 - 9.5%

SEF978U

BASIC SERVICE PROCEDURE

EC-1217

[VG33ER]

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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 markA 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.

2.

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

SEF013Y

Lock nut

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

SEF970R

SEF971R

SEF774U

EC-1218

[VG33ER]

BASIC SERVICE PROCEDURE

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

UBS00DRW

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.

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.

Lock nut

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

SEF970R

SEF971R

SEF214Y

SEF164X