Powertrain Management: Description and Operation

System Input/Output Chart:

PURPOSE
This vehicle has an Engine Control Module (ECM) to control the fuel injection, idle speed, ignition timing, Exhaust Gas Recirculation (EGR), evaporative canister system, and the fuel pump systems. The ECM monitors various engine and vehicle operating conditions, processes the information, and generates outputs to control the systems/components. In addition, the ECM is provided with a diagnostic test mode (DTM) to facilitate troubleshooting in case of failure.

It is important to review the components and wiring diagrams for specific components controlled by the ECM.