Engine Control Module: Description and Operation

Function

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) Relay (J17) as well as On Board Diagnostic (OBD).