Electronic Control Unit (Ecu)

The ECU consists of a microcomputer, inspection lights, a diagnostic mode selector, connectors and wiring for voltage signal input, voltage signal output and power supply. The unit is not serviceable and should not be opened. Monitor lights are provided on side of unit so system operation can be checked. The control unit contains memory and logic circuits that enable it to interpret sensor inputs and control various engine systems. For ease of understanding, components will be grouped into 2 categories. The first being INPUT DEVICES, components with voltage signals that are inputted into the ECU. The second being OUTPUT DEVICES, components that are controlled by the ECU using either voltage or ground circuits.