Nissan Murano: Dtc/circuit Diagnosis / P0444 Evap Canister Purge Volume Control Solenoid Valve

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P0444 Evap Canister Purge Volume Control Solenoid Valve

DTC Description

DTC DETECTION LOGIC

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

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

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0444

PURG VOLUME CONT/V

(Evaporative emission system purge control valve circuit open) 		Diagnosis condition Start engine and let it idle
Signal (terminal) Voltage signal transmitted from EVAP canister purge volume control solenoid valve to ECM
Threshold An excessively low voltage signal is sent to ECM through the valve
Diagnosis delay time —
P0445

PURG VOLUME CONT/V

(Evaporative emission system purge control valve circuit shorted) 		Diagnosis condition Start engine and let it idle
Signal (terminal) Voltage signal transmitted from EVAP canister purge volume control solenoid valve to ECM
Threshold An excessively high voltage signal is sent to ECM through the valve
Diagnosis delay time —

POSSIBLE CAUSE

DTC P0444

  • Harness or connectors

    (The solenoid valve circuit is open or shorted.)

  • EVAP canister purge volume control solenoid valve

DTC P0445

  • Harness or connectors

    (The solenoid valve circuit is shorted.)

  • EVAP canister purge volume control solenoid valve

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

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.

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>>

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

NO>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

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.

    EVAP canister purge volume control solenoid valve Ground Voltage
    Connector Terminal
    F16 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Perform the trouble diagnosis for power supply circuit.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT 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
    F16 2 F78 54 Existed

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

Is the inspection result normal?

YES>>

With CONSULT: GO TO 3.

YES>>

Without CONSULT: GO TO 4.

NO>>

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

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>>

INSPECTION END

NO>>

GO TO 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>>

INSPECTION END

NO>>

Replace EVAP canister purge volume control solenoid valve. Refer to Component Parts Location.

Component Inspection

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. Start engine.

  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.

Condition

(PURG VOL C/V value)

Air passage continuity

between and
100% Existed
0% Not existed

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.

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

Condition

Air passage continuity

between and
12 V direct current supply between terminals 1 and 2 Existed
No supply Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP canister purge volume control solenoid valve. Refer to Component Parts Location.

    P0443 Evap Canister Purge Volume Control Solenoid Valve

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