EVAPORATIVE EMISSION CONTROL SYSTEM(w/ Canister Pump Module)


  1. OUTLINE


    1. The evaporative emission control system prevents the fuel vapor that is created in the fuel tank assembly from being released directly into the atmosphere.

    2. The canister stores the fuel vapor that has been created in the fuel tank assembly.

    3. This system consists of a purge VSV (duty vacuum switching valve assembly), canister, canister pump module and ECM.

    4. The ECM controls the purge VSV (duty vacuum switching valve assembly) in accordance with the driving conditions in order to direct the fuel vapor into the engine, where it is burned.

    5. In this system, the ECM checks for evaporative emission leaks and stores Diagnostic Trouble Codes (DTCs) in the event of a malfunction. An evaporative emission leak check consists of an application of vacuum to the evaporative emission system, which the ECM monitors the system for changes in pressure in order to detect a leak.

    6. The Onboard Refueling Vapor Recovery (ORVR) system is used.

    7. The canister pressure sensor is included in the canister pump module.

    8. A canister filter is provided on the fresh air line.