Dtc Summary

DTC

Monitoring Item

Malfunction Detection Condition

Trouble Area

Detection Timing

Detection Logic

Purge VSV (Vacuum Switching Valve) stuck open

Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than [second reference pressure x 0.2], ECM determines that purge VSV stuck open.

• Connector/wire harness (Purge VSV - ECM)

• Canister pump module

• Leakage from EVAP system

While ignition switch off

2 trip detection logic

P0441

Purge VSV stuck closed

After EVAP leak check performed, purge VSV turned ON (open), and atmospheric air introduced into EVAP system. Reference pressure measured at start and at end of check. If pressure does not return to near atmospheric pressure, ECM determines that purge VSV stuck closed.

• Connector/wire harness (Purge VSV - ECM)

• Canister pump module

• Leakage from EVAP system

While ignition switch off

2 trip detection logic

Purge flow

While engine running, following conditions successively met:

• Negative pressure not created in EVAP system when purge VSV turned ON (open)

• EVAP system pressure change less than 0.5 kPa-g (3.75 mmHg-g) when vent valve turned ON (closed)

• Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa-g (0.75 mmHg-g)

• Connector/wire harness (Purge VSV - ECM)

• Leakage from EVAP line (Purge VSV - Intake manifold)

• ECM

While engine running

2 trip detection logic

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