Nissan Frontier D22. Instruction — part 306

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

EC-327

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

On Board Diagnosis Logic

UBS00D7I

DTC Confirmation Procedure

UBS00D7J

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11V at idle.

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for at least 30 seconds.

4.

If 1st trip DTC is detected, go to

EC-330, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II”.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0444

EVAP canister purge volume
control solenoid valve circuit
open

An excessively low voltage signal is sent
to ECM through the valve

●

Harness or connectors
(The sensor circuit is open or shorted.)

●

EVAP canister purge volume control
solenoid valve

P0445

EVAP canister purge volume
control solenoid valve circuit
shorted

An excessively high voltage signal is sent
to ECM through the valve

●

Harness or connectors
(The sensor circuit is shorted.)

●

EVAP canister purge volume control
solenoid valve

SEF058Y

EC-328

[KA24DE]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Wiring Diagram

UBS00D7K

BBWA1061E

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

EC-329

[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-

MINA

L 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 (More than 200 sec-
onds after starting engine)

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-330

[KA24DE]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Diagnostic Procedure

UBS00D7L

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 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 (With CONSULT-II)>>GO TO 5.
OK (Without CONSULT-II)>>GO TO 6.
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