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".
P0444, P0445 EVAP canister purge volume control solenoid
P0448 EVAP canister vent control valveCamshaft
Exploded View
Camshaft position sensor (INT)
O-ring
Camshaft brackets (INT)
Camshaft brackets (EXH)
Camshaft (INT)
O-ring
Camshaft bracket (No. 1)
Camshaft sprocket (INT)
Front cover (partial view)
Valve timing control cover O-rings
(INT)
V ...
System description
COMPONENT PARTS
Component Parts Location
IPDM E/R
Engine compartment (LH)
SYSTEM
RELAY CONTROL SYSTEM
RELAY CONTROL SYSTEM : System Description
SYSTEM DIAGRAM
DESCRIPTION
IPDM E/R activates the internal control circuit to perform the relay ON-OFF
control according to t ...
Symptom diagnosis
HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
Symptom Table
SYMPTOM TABLE
Symptom
Reference Page
A/C system does not come on.
Go to Trouble Diagnosis Procedure for A/C System.
HAC-166, "FRONT
A/C CONTROL : Diagnosis
Procedure"
Air ou ...