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Home >> Chrysler >> 2007 >> 300 Base >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0325 To P0456 >> P0441-EVAP Purge System Performance >> Additional Wiring

Additional Wiring

For complete wiring diagrams refer to:

SYSTEM WIRING DIAGRAMS for 300.

SYSTEM WIRING DIAGRAMS for Charger.

SYSTEM WIRING DIAGRAMS for Magnum.

The EVAP Purge Monitor tests the integrity of the hoses/tube between the throttle body/intake and the fuel tank. The monitor is a two stage test and runs only after the EVAP system passes the small leak test. Stage one is non-intrusive. The PCM monitors the purge vapor ratio and the ESM switch closed ratio. If the purge vapor ratio is above a calculated value, the monitor passes. If the ESM switch closed ratio is greater than calculated value when purge flow is greater than a minimum value, the monitor passes. Stage two is an intrusive test and runs only if stage one does not pass. The PCM commands the purge solenoid to flow at a specified rate to force the purge vapor ratio to update. The ratio is compared to a calibrated specification. If the ratio is less than the specification, a one trip failure is recorded. This test can detect if the purge hose is off, obstructed, or the purge valve is not operational.

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