October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Electronic Control Module

On some engines, the Electronic Control Module controls vacuum to the purge valve with a solenoid valve. When the system is in the open loop, solenoid is energized and blocks vacuum to purge valve. When system is in closed loop, above a specified RPM, solenoid is de-energized and vacuum can be applied to purge valve, releasing accumulated vapors from canister to induction system.