P0444

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. CONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:


Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for at least 13 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 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 the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Perform the trouble diagnosis for power supply circuit.

2. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

1.Turn ignition switch OFF.
Revision: March 20122013 Infiniti JX
2.Disconnect ECM harness connector.
3.Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1- With CONSULT: GO TO 3.
YES-2- Without CONSULT: GO TO 4.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT
1.Reconnect all harness connectors disconnected.
2.Start engine.
3.Perform "PURG VOL C/V" in "ACTIVE TEST" mode with CONSULT. Check that engine speed varies according to the valve opening.
Does engine speed vary according to the valve opening?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- GO TO 4.

4. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check EVAP canister purge volume control solenoid valve. Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace EVAP canister purge volume control solenoid valve. Refer to "ENGINE CONTROL SYSTEM : Component Parts Location" Engine Control System.


Component Inspection


1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT
1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4.Turn ignition switch ON.
5.Select "PURG VOL C/V" in "ACTIVE TEST" mode with CONSULT.





6.Touch "Qd" and "Qu" on CONSULT screen to adjust "PURG
VOL C/V" opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following conditions.





Without CONSULT
1.Turn ignition switch OFF.
2.Disconnect EVAP canister purge volume control solenoid valve harness connector.
3.Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
Revision: March 20122013 Infiniti JX





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





Is the inspection result normal?
YES- INSPECTION END
NO- Replace EVAP canister purge volume control solenoid valve. Refer to "ENGINE CONTROL SYSTEM : Component Parts Location" Engine Control System.
Revision: March 20122013 Infiniti JX