S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
Engine Control Module: Description and Operation
Engine Control Module
=> [ Engine Control Module Voltage Supply, Checking ] See: Computers and Control Systems/Testing and Inspection/Component Tests and
General Diagnostics/Component Tests (VAG Code Tests)/Engine Control Module Voltage Supply, Checking
=> [ Engine Control Module, Replacing ] See: Service and Repair
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 (J17) as well as On Board Diagnostic (OBD).