Nissan Sentra B18 (2020-2025) Service Manual: P0447 Evap Canister Vent Control Valve

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0447 Evap Canister Vent Control Valve

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0447	VENT CONTROL VALVE (Evaporative emission system vent control circuit open)	Diagnosis condition	Engine running at idle
		Signal (terminal)	EVAP canister vent control valve signal
		Threshold	An improper voltage signal is sent to ECM through EVAP canister vent control valve
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (EVAP canister vent control valve circuit is open or shorted.)
EVAP canister vent control valve

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

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 the engine and wait at least 8 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Proceed 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

DTC Diagnosis Procedure

INSPECTION START

Do you have CONSULT?
YES >>
GO TO 2.
NO >>
GO TO 3.

CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

With CONSULT

Turn ignition switch OFF and then turn ON.
Select “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
Touch “ON/OFF” on CONSULT screen.

Check for operating sound of the valve.

Clicking sound should be heard.

Is the inspection result normal?

YES >>

GO TO 7.

NO >>

GO TO 3.

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY

Turn ignition switch OFF.
Disconnect EVAP canister vent control valve harness connector.
Turn ignition switch ON.

Check the voltage between EVAP canister vent control valve harness connector and ground.

+		−	Voltage
EVAP canister vent control valve
Connector	Terminal
B17	1	Ground	Battery voltage

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

GO TO 4.

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect IPDM E/R harness connector.

Check the continuity between EVAP canister vent control valve harness connector and IPDM E/R harness connector.

EVAP canister vent control valve		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B17	1	F96	75	Existed

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.

CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between EVAP canister vent control valve harness connector and ECM harness connector.

EVAP canister vent control valve		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B17	2	E16	151	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

Repair or replace malfunctioning part.

CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES >>
GO TO 7.
NO >>
Clean the rubber tube using an air blower.
CHECK EVAP CANISTER VENT CONTROL VALVE

Check the EVAP canister vent control valve. Refer to Component Inspection.

Is the inspection result normal?
YES >>
INSPECTION END
NO >>
Replace EVAP canister vent control valve. Refer to Exploded View.

P0448 Evap Canister Vent Control Valve

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

Other materials:

Does Not Restart After the Idle Start/stop System Is Activated
Diagnosis Procedure Diagnosis Procedure CHECK SYMPTOM Check the symptoms. A start/stop indicator lamp turned on, and did an engine perform a stall at the time of restart from a idle start/stop system? YES >> GO TO 2. NO > ...

Precautions for Refrigerant System Service
Precautions For Refrigerant System Service GENERAL REFRIGERANT PRECAUTION Warning: Do not breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Remove HFO-1234yf (R-1234yf) from the A/C system, using certified s ...

Can communication circuit
Diagnosis procedure 1.Connector inspection Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Disconnect all the unit connectors on can communication system. Check terminals and connectors for damage, bend and loose connection. Is the inspection resu ...