Canister Purge Solenoid: Description and Operation

Duty Cycle Purge Solenoid Location:

PURPOSE
Powertrain Control Module (PCM) controls timing and rate of purge flow, by varying solenoid pulse width, (the length of time solenoid is energized per cycle).

OPERATION
PCM controls solenoid by applying and removing solenoid ground.
- During open loop operation, (including cold start up and hot start time delay), the PCM DE-ENERGIZES the solenoid, preventing EVAP Canister purge.
- When the engine enters closed loop, (after warm-up and time delay), PCM ENERGIZES and DE-ENERGIZES solenoid approximately 5 to 10 times per second, depending on operating conditions.

NOTE: Solenoid will not operate unless installed correctly. The word TOP should face up when installed.