Concorde V6-201 3.3L VIN T FI (1993)
Canister Purge Solenoid: Description and Operation
FUNCTION
The Duty Cycle EVAP Purge solenoid controls the rate of vapor flow from charcoal canister to the throttle body. The PCM regulates purge solenoid
operation.
OPERATION
The PCM controls purge solenoid by switching the ground path on and off based on engine operating conditions. When solenoid is energized, vacuum is
prevented from reaching the charcoal canister. When solenoid is de-energized, vacuum is allowed to reach the charcoal canister. The PCM energizes and
de-energizes the solenoid 5 to 10 times per second. The PCM controls the rater of flow by adjusting solenoid pulse width.
CONDITIONS
The PCM will not allow vapors to be purged until the engine has reached a predetermined temperature and a time delay interval has elapsed. The PCM,
under certain idle conditions, energizes the solenoid to update fuel calibration.
