Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)
INSPECT PURGE VSV (RESISTANCE)
INSPECT PURGE VSV (POWER SOURCE)
CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)
CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY)
DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit |
DESCRIPTION
- HINT:
- This DTC P0443 is applicable to Mexico models only.
To reduce hydrocarbon 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 (Vacuum Switching Valve for Purge Control) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.DTC No.
| DTC Detection Condition
| Trouble Area
|
P0443
| Terminal voltage of ECM output circuit does not correspond with drive signals from ECM to purge VSV
(1 trip detection logic)
| - Open or short in purge VSV circuit
- Purge VSV
- ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL) |
Connect the Techstream to the DLC3.
Disconnect the vacuum hose (canister side) from the purge VSV.
Start the engine.
Turn the Techstream 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 Techstream, check whether the port of the purge VSV applies suction to your finger.
- OK:
Tester Operations
| Specified Conditions
|
VSV ON
| Purge VSV port applies suction to finger
|
VSV OFF
| Purge VSV port applies no suction to finger
|
Reconnect the vacuum hose to the purge VSV.
| 2.INSPECT PURGE VSV (RESISTANCE) |
Disconnect C3 purge VSV connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connections
| Specified Conditions
|
1 - 2
| 23 to 26 Ω at 20°C (68°F)
|
Reconnect the purge VSV connector.
| 3.INSPECT PURGE VSV (POWER SOURCE) |
Disconnect the C3 purge VSV connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connections
| Specified Conditions
|
C3-2 - Body ground
| 11 to 14 V
|
Reconnect the purge VSV connector.
| 4.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) |
Disconnect the C3 purge VSV connector.
Disconnect the C20 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for open):
Tester Connections
| Specified Conditions
|
C3-1 - C20-49 (PRG)
| Below 1 Ω
|
- Standard Resistance (Check for short):
Tester Connections
| Specified Conditions
|
C3-1 or C20-49 (PRG) - Body ground
| 10 kΩ or higher
|
Reconnect the purge VSV connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY) |
Disconnect the C3 purge VSV connector.
Remove the integration relay from the engine room relay block.
Check the resistance.
- Standard Resistance (Check for open):
Tester Connections
| Specified Conditions
|
C3-2 - 1A-4
| Below 1 Ω
|
- Standard Resistance (Check for short):
Tester Connections
| Specified Conditions
|
C3-2 or 1A-4 - Body ground
| 10 kΩ or higher
|
Reconnect the purge VSV connector.
Reinstall the integration relay.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
