Infiniti F50. Manual - part 475

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-541

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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.)

Diagnostic Procedure

EBS00MKR

1. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIR-

CUIT

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 1 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

54

L/Y

EVAP canister purge volume 
control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed is about 2,000 rpm (More 
than 100 seconds after starting engine).

BATTERY VOLTAGE

(11 - 14V)

PBIB0050E

PBIB0051E

PBIB0025E

Voltage: Battery voltage

PBIB0148E

EC-542

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E32, F32

●

Fuse, fusible link and relay block (J/B) connector E3

●

10A fuse

●

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

>> Repair harness or connectors.

3. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIR-

CUIT FOR OPEN AND SHORT

1.

Turn ignition switch “OFF”.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 54 and EVAP canister purge volume control solenoid
valve terminal 2. Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 4.

NG

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

4. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

OK or NG

OK

>> GO TO 5.

NG

>> Replace EVAP control system pressure sensor.

5. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-357, "Component Inspection"

 .

OK or NG

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

>> Replace EVAP control system pressure sensor.

Continuity should exist.

Water should not exist.

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-543

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6. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Turn ignition switch “OFF”.

2.

Reconnect harness connectors disconnected.

3.

Start engine.

4.

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.

7. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-544, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

8. 

CHECK RUBBER TUBE FOR CLOGGING

1.

Disconnect rubber tube connected to EVAP canister vent control valve.

2.

Check the rubber tube for clogging.

OK or NG

OK

>> GO TO 9.

NG

>> Clean the rubber tube using an air blower.

9. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-551, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP canister vent control valve.

10. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve attached.

2.

Check if water will drain from the EVAP canister.

Yes or No

Yes

>> GO TO 11.

No

>> GO TO 14.

PBIB0147E

SEF596U

EC-544

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

11. 

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 2.1 kg (4.6 lb).

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 12.

12. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between EVAP canister and water separator for clogging or poor connection

>> Repair hose or replace EVAP canister.

13. 

CHECK WATER SEPARATOR

Refer to 

EC-537, "Component Inspection"

 .

OK or NG

OK

>> GO TO 14.

NG

>> Clean or replace water separator.

14. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MKS

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 conditions.

 Without CONSULT-II

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

Condition

(PURG VOL CONT/V value)

Air passage continuity 

between A and B

100.0%

Yes

0.0%

No

PBIB0149E

Condition

Air passage continuity 

between A and B

12V direct current supply between 
terminals 1 and 2

Yes

No supply

No

PBIB0150E