Nissan Frontier D22. Instruction — part 342

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-471

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

4

LG/R

ECM relay
(Self-shutoff)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition switch
OFF

0 - 1V

[Ignition switch: OFF]

●

A few seconds passed after turning ignition
switch OFF

BATTERY VOLTAGE
(11 - 14V)

5

R/Y

EVAP canister purge
volume control sole-
noid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed is 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

67

B/P

Power supply for
ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

72

B/P

117

B/P

Current return

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

SEF109V

SEF110V

EC-472

[KA24DE]

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Diagnostic Procedure

UBS00DBF

1.

CHECK POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve
harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between EVAP canister purge volume control
solenoid valve terminal 2 and engine ground with CONSULT-II
or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM relay

●

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

>> Repair harness or connectors.

3.

CHECK OUTPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 5 and EVAP canister purge volume control solenoid
valve terminal 1.
Refer to Wiring diagram.
Continuity should exist.

4.

Also, check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the harness for open or short between EVAP canister purge volume control solenoid valve and ECM.

>> Repair open circuit or short to ground or short to power in harness or connectors.

SEF339V

Voltage

: Battery voltage

SEF192V

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-473

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

5.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1.

Remove EVAP control system pressure sensor with its harness
connector connected.

2.

Remove hose from EVAP control system pressure sensor.

3.

Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.

CAUTION:

●

Always calibrate the vacuum pump gauge when using it.

●

Do not apply below

−93.3 kPa (−700 mmHg, −27.56 inHg) or over 101.3 kPa (760 mmHg, 29.56

inHg) of pressure.

4.

Check output voltage between ECM terminal 62 and engine
ground.

CAUTION:

Discard any EVAP control system pressure sensor which
has been dropped from a height of more than 0.5 m (19.7 in)
onto a hard surface such as a concrete floor; use a new
one.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Replace EVAP control system pressure sensor.

6.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II

1.

Start engine.

2.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

SEF341V

Applied vacuum kPa (mmHg, inHg)

Voltage [V]

Not applied

1.8 - 4.8

-26.7 (-200, -7.87)

2.1 to 2.5V lower than above value

SEF198V

SEF801Y

EC-474

[KA24DE]

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following condi-
tions.

Without CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following condi-
tions.

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

8.

CHECK EVAP CANISTER VENT CONTROL VALVE-I

1.

Remove EVAP canister vent control valve from EVAP canister.

2.

Check portion B of EVAP canister vent control valve for being
rusted.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP canister vent control valve.

SEF334X

SEF335X

BBIA0308E