Nissan Sentra B18 (2020-2025) Service Manual: P0444 Evap Canister Purge Volume Control Solenoid Valve

Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (EVAP canister purge volume control solenoid valve circuit is open or shorted.)

• EVAP canister purge volume control solenoid valve

FAIL-SAFE

Not applicable

Confirmation Procedure

1. PRECONDITIONING

   If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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 the engine and let it idle for at least 13 seconds.

   2. Check 1st trip DTC.

   Is 1st trip DTC detected?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO-1 >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc 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.

      +		−	Voltage
      EVAP canister purge volume control solenoid valve
      Connector	Terminal
      F13	1	Ground	Battery voltage

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   GO TO 2.

2. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect IPDM E/R harness connector.

   3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and IPDM E/R harness connector.

      EVAP canister purge volume control solenoid valve		IPDM E/R		Continuity
      Connector	Terminal	Connector	Terminal
      F13	1	F96	73	Existed

   4. Also check harness for short to ground.

   Is the inspection result normal?

   YES >>

   Perform the trouble diagnosis for power supply circuit.

   NO >>

   Repair or replace malfunctioning part.

3. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE INPUT SIGNAL CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and ECM harness connector.

      EVAP canister purge volume control solenoid valve		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F13	2	F25	122	Existed

   4. Also check harness for short to ground.

   Is the inspection result normal?

   YES-1 >>

   With CONSULT: GO TO 4.

   YES-2 >>

   Without CONSULT: GO TO 5.

   NO >>

   Repair or replace malfunctioning part.

4. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

   With CONSULT

   1. Reconnect all harness connectors disconnected.

   2. Start engine.

   3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

   4. Check that engine speed varies according to the valve opening.

   Is the inspection result normal?

   YES >>

   Refer to Component Inspection.

   NO >>

   GO TO 5.

5. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

   Check the EVAP canister purge volume control solenoid valve. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace EVAP canister purge volume control solenoid valve. Refer to Exploded View.

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