Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0447 EVAP canister vent control valve
Diagnosis Procedure

1.INSPECTION START

Do you have CONSULT?

YES >> GO TO 2.

NO >> GO TO 3.

2.CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

With CONSULT

  1. Turn ignition switch OFF and then turn ON.
  2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode of "ENGINE" using CONSULT.
  3. Touch "ON/OFF" on CONSULT screen.
  4. 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.

3.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect EVAP canister vent control valve harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between EVAP canister vent control valve harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 5.

NO >> GO TO 4.

4.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect IPDM E/R harness connector.
  3. Check the continuity between EVAP canister vent control valve harness connector and IPDM E/R harness connector. 
  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 errordetected parts.

5.CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EVAP canister vent control valve harness connector and ECM harness connector. 
  4. Also check harness for short to power.

Is the inspection result normal?

YES >> GO TO 6.

NO >> Repair or replace errordetected parts.

6.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.

7.CHECK EVAP CANISTER VENT CONTROL VALVE

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

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".

NO >> Replace EVAP canister vent control valve. Refer to FL, "Removal and Installation"

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