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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Gasoline Engines) >> Powertrain Control Module & Vehicle Control Module >> Central Processing Unit

Central Processing Unit

The Central Processing Unit (CPU) uses digital signals to perform all mathematical computations and logic functions necessary to deliver proper air/fuel mixture. CPU also calculates spark timing and idle speed. The CPU controls operation of emission control, closed loop mode fuel control and diagnostic system.

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