audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Engine Control Module|Testing and Inspection > < Engine Controls - Low Power/Won't Move After Stopping|Page 3659

Q7 Quattro V8-4.2L (BAR) (2008)

Page 1
background image

Engine Control Module: Description and Operation

Engine Control Module

=> [ Voltage Supply, Checking ] See: 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: 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).

Engine Control Module|Testing and Inspection > < Engine Controls - Low Power/Won't Move After Stopping|Page 3659