EEC IV Theory/Operation: Operation: Notes

The engine control system consists of the ECA, sensors and switches, and actuators. In order for the ECA to properly perform its function, it must be kept constantly informed of engine operating conditions. It is the function of the engine sensors to supply the ECA, via electrical signal, with specific information as required to determine engine operating conditions. The ECA can then send out electrical signals of its own to control fuel flow (determining air/fuel ratio), emission controls and ignition timing. Individual component operation is as follows: