Jeep 52090419AA SOLENOID-Proportional PURGE

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The Powertrain Control Module (PCM) opens the canister purge solenoid under certain conditions, allowing intake vacuum to pull fuel vapors into the intake manifold.

The EVAP system utilizes a canister filled with activated charcoal to absorb and store fuel vapors. The fuel tank filler cap is equipped with a two-way valve that vents fuel vapors to the atmosphere in the event of a system failure. A check valve regulates the flow of fuel vapor from the tank to the canister, preventing fuel flow when the tank is full or during a rollover accident. The EVAP system is electronically controlled by the PCM, which operates a purge control solenoid to open a diaphragm valve in the canister, allowing fuel vapors to be drawn into the intake manifold. The PCM controls the rate of flow by adjusting the duty cycle of the solenoid. A leak detection monitor system is also in place to detect any leaks in the EVAP system.