DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL)
INSPECT PURGE VSV
INSPECT PURGE VSV (POWER SOURCE VOLTAGE)
CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY)
CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)
DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit
DESCRIPTION
To reduce HC emissions, evaporated fuel from the fuel tank is routed through a charcoal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signals to the purge VSV so that the intake amount of HC emissions is appropriate for driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.
| DTC Code | DTC Detection Condition | Trouble Area |
| P0443 | The terminal voltage of the ECM output circuit does not correspond with the drive signals from the ECM to the purge VSV (1 trip detection logic). | Open or short in purge VSV circuit
Purge VSV
ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL) |
Connect the intelligent tester to the DLC3.
Remove the vacuum hose of the purge VSV from the charcoal canister.
Start the engine and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
When the purge VSV is operated using the tester, check whether the disconnected hose applies suction to your finger.
- OK:
| Tester Operation | Specified Condition |
| VSV is ON | Disconnected hose applies suction to finger |
| VSV is OFF | Disconnected hose applies no suction to finger |
| | CHECK FOR INTERMITTENT PROBLEMS ()
|
|
|
Inspect the purge VSV ().
| 3.INSPECT PURGE VSV (POWER SOURCE VOLTAGE) |
Disconnect the purge VSV connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| C55-1 - Body ground | Engine switch on (IG) | 11 to 14 V |
| 4.CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY) |
Disconnect the purge VSV connector.
Remove the integration relay from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C55-1 - 1B-4 | Always | Below 1 Ω |
| C55-1 or 1B-4 - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPAIR OR REPLACE POWER SOURCE CIRCUIT |
|
| 5.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) |
Disconnect the purge VSV connector.
Disconnect the ECM connector.
Measure the resistance between the terminals of the wire harness side connectors.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C55-2 - C45-63 (PRG) | Always | Below 1 Ω |
| C55-2 or C45-63 (PRG) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
