EEC System

This system controls purging of the vapor canister. The ECM controls vacuum to the purge valve with a solenoid. When the engine is in open loop, the solenoid valve is energized. This blocks vacuum to the purge valve.

The solenoid is de-energized, allowing the vacuum signal to reach the purge valve, when the engine is at normal operating temperature, above idle speed and the control system is in closed loop (system not in ALCL mode). Fuel vapors are then drawn into the intake manifold and burned.