RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Engine Control Module: Description and Operation
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)/Voltage Supply, Checking
=> [ Engine Control Module 1, Removing and Installing ] See: Service and Repair/Engine Control Module 1, Removing and Installing
=> [ Engine Control Module 2, Removing and Installing ] See: Service and Repair/Engine Control Module 2, Removing and Installing
The 4.2L BNS engine is regulated by two Engine Control Modules (ECM). The Motronic Engine Control Module (ECM) (J623) and the Engine
Control Module (ECM) 2 (J624).
The Motronic Engine Control Module (ECM) (J623) and the Engine Control Module (ECM) 2 (J624) 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 Engine Component Power Supply Relay (J757) as well as On Board Diagnostic (OBD).
