E.C.C. Description (Models with catalyzer) - E.G.R. (Exhaust Gas Recirculation) & Canister Control (Models with E.G.R.)

In addition, a system is provided which precisely cuts and controls port vacuum applied to the E.G.R. control valve and canister to suit engine operating conditions. This cut-and-control operation is accomplished through the E.C.U. When the E.C.U. detects any of the following conditions, current flows through the solenoid valve in the E.G.R. and canister control vacuum line.

This causes the port vacuum to be discharged into the atmosphere so that the E.G.R. control valve and canister remain closed.

1) During warm-up 2) Engine starting 3) High-speed engine operation 4) Engine idling 5) Excessively high engine temperature