Engine Control Module: Description and Operation

Engine Control Module

The Engine Control Module (ECM) (J623) regulates fuel injection, Throttle Valve Control Module (J338), oxygen sensor regulation, ignition, knock control, Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80), engine speed limitation through fuel injectors or Fuel Pump (FP) Control Module (J538) as well as On Board Diagnostics (OBD).