EGR Control Solenoid: Description and Operation

COMPONENT DESCRIPTION
The EGRC-solenoid valve (for California) or (except for California) EGR valve and EVAP canister purge control solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the coil in the solenoid valve is energized. A plunger will then move to flow the vacuum signal (from the intake manifold collector to the EGR valve.)
The vacuum signal passes through the solenoid valve. The signal then reaches the EVAP canister and the EGR valve. When the ECM sends an OFF signal, the plunger is returned by the spring and cut the vacuum signal.