Engine Control Module: Description and Operation

Engine Control Module

The Motronic Engine Control Module (ECM) (J623) regulates fuel injection, the 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).