Q7 Quattro V8-4.2L (BAR) (2008)
Engine Control Module: Description and Operation
Engine Control Module
=> [ Voltage Supply, Checking ] See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Voltage
Supply, Checking
=> [ Engine Control Module, Replacing ] See: Service and Repair/Engine Control Module, Replacing
=> [ CAN-Bus Terminal Resistance, Checking ] See: Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/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 Engine
Component Power Supply Relay (J757) as well as On Board Diagnostic (OBD).