DTC Description
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
| P0447 | VENT CONTROL VALVE (Evaporative emission system vent control circuit open) | An improper voltage signal is sent to ECM through EVAP canister vent control valve. |
POSSIBLE CAUSE
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected? YES >> Proceed to EC-319, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.INSPECTION START
Do you have CONSULT? Do you have CONSULT? YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT
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

Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
5.CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT

Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK 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-321, "Component Inspection".
Is the inspection result normal? YES >> GO TO 8.
NO >> Replace EVAP canister vent control valve. Refer to FL-21, "Removal and Installation"
8.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK EVAP CANISTER VENT CONTROL VALVE-1
Is it rusted? YES >> Replace EVAP canister vent control valve. Refer to FL- 21, "Removal and Installation".
NO >> GO TO 2.

2.CHECK EVAP CANISTER VENT CONTROL VALVE-2
With CONSULT
Make sure new O-ring is installed properly.

| Condition (VENT CONT/V) | Air passage continuity between A and B |
| ON | Not existed |
| OFF | Existed |
Operation takes less than 1 second.
Without CONSULT
Check air passage continuity and operation delay time under the following conditions.
Make sure new O-ring is installed properly.

| Condition | Air passage continuity between A and B |
| 12 V direct current supply between terminals 1 and 2 | Not existed |
| OFF | Existed |
Operation takes less than 1 second.
Is the inspection result normal? YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. Refer to FL-21, "Removal and Installation".
3.CHECK EVAP CANISTER VENT CONTROL VALVE-3
With CONSULT
Make sure new O-ring is installed properly.

| Condition (VENT CONT/V) | Air passage continuity between A and B |
| ON | Not existed |
| OFF | Existed |
Operation takes less than 1 second.
Without CONSULT
Make sure new O-ring is installed properly.

| Condition | Air passage continuity between A and B |
| 12 V direct current supply between terminals 1 and 2 | Not existed |
| OFF | Existed |
Operation takes less than 1 second.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace EVAP canister vent control valve. Refer to FL-21, "Removal and Installation".
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How to check terminal
CONNECTOR AND TERMINAL PIN KIT
Use the connector and terminal pin kits listed below when
replacing connectors or terminals.
The connector and terminal pin kits contain some of the most
commonly used NISSAN/INFINITI connectors
and terminals. For detailed connector and termin ...
Outside mirrors
Outside mirrors
The outside mirror remote control will operate
only when the ignition switch is in the ACC or ON
position.
Move the small switch 1 to select the right or left
mirror. Adjust each mirror to the desired position
using the large switch 2 .
WARNING
Objects v ...