Powertrain Management: Description and Operation

System Diagram:

System Overview:

PURPOSE
Control of fuel injection, Emission Control And Ignition Systems.

OPERATION
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.

The system is also equipped with a Fail-Safe operation mode. This allows Limited system operation in the event of certain component or system failures.

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