Canister Purge Solenoid: Description and Operation

PURPOSE
The Evaporative Emissions (EVAP) Control System Purge Control Solenoid Valve is used to control vacuum to the EVAP Control Diaphragm Valve.

OPERATION
Upon receiving a signal from the Programmed Fuel Injection Electronic Control Module (PGM-FI ECM) the EVAP Purge Control Solenoid Valve applies vacuum to the EVAP Control Diaphragm Valve and canister purging is accomplished by drawing fresh air through the canister and into a port on the throttle body.

NOTE: 5 seconds after engine start, the purge control solenoid valve remains off until coolant temperature warms above 70°C (158°F).