Engine Control Module: Description and Operation

Engine Control Module

--> [ Voltage Supply, Checking ] Voltage Supply, Checking

--> [ Motronic Engine Control Module, Replacing ] Motronic Engine Control Module, Replacing

--> [ Motronic Engine Control Module Power Supply Relay, Checking ] Motronic Engine Control Module Power Supply Relay, Checking

--> [ Motronic Engine Control Module Power Supply Relay 2, Checking ] Motronic Engine Control Module Power Supply Relay 2, Checking

--> [ CAN-Bus Terminal Resistance, Checking ] CAN-Bus Terminal Resistance, Checking

Motronic 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 (J49) as well as On Board Diagnostic (OBD).