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HOMESERVICE MANUALSSAAB19999-3 BASE, 2D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETHEORY AND OPERATIONENGINE CONTROLS - THEORY & OPERATIONCOMPUTERIZED ENGINE CONTROLSENGINE CONTROL MODULE (ECM)
1999 Saab 9-3 Base, 2D Hatchback, Automatic

Engine Control Module (ECM)

1999 Saab 9-3 Base, 2D Hatchback, AutomaticSECTION Engine Control Module (ECM)

On 9-3 models, ECM is located above right side kick panel, behind glove box. On 9-5 models, ECM is located in engine compartment, between inner and outer firewall below windshield, on passenger side. For ECM pin and wire color identification, see appropriate SELF-DIAGNOSTICS article.

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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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • The engine overheats, stalls repeatedly, or misfires under load.
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