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Home › Saab › 2001 › 9-3 Base, 2D Hatchback, Automatic › Repair and Diagnosis › Engine Performance › Theory and Operation › Engine Controls - Theory & Operation › Computerized Engine Controls › Engine Control Module (ECM)

Engine Control Module (ECM)

ECM controls all engine functions: fuel injection, ignition timing, turbo boost pressure, idle speed, emission control, combustion analysis and self-diagnostics. For a description of ECM controlled functions, see TRIONIC ENGINE MANAGEMENT SYSTEM  .

NOTE: Components are grouped into 2 categories. The first category is INPUT DEVICES  , which are components that control or produce voltage signals monitored by ECM. The second category is OUTPUT SIGNALS  , which are controlled by ECM.
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