Computerized Engine Controls: Notes

The computerized engine control system monitors and controls engine operation. Input sensors supply information to an Electronic Control Module (ECM), and Turbocharger Control Unit (TCU) (if equipped). The ECM processes information from input sensors and sends output signals to various control devices. See INPUT DEVICES and OUTPUT SIGNALS in this article. This information is processed by ECM to calculate proper fuel delivery, ignition timing, fuel pressure, fuel evaporative purge, air injection and turbocharger (if equipped).