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Engine Control Module|Testing and Inspection > < Engine Controls - Low Power/Won't Move After Stopping|Page 343

S4 Quattro Wagon V8-4.2L (BHF) (2008)

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Engine Control Module: Description and Operation

Engine Control Module

=> [ Engine Control Module Voltage Supply, Checking ] See: Powertrain Management/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).

Engine Control Module|Testing and Inspection > < Engine Controls - Low Power/Won't Move After Stopping|Page 343