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Home >> GMC >> 1985 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Diesel CEC Theory/Operation >> Operation >> Electronic Control Module (ECM) Operation >> Central Processing Unit

Central Processing Unit

Digital signals received by the CPU are used to perform all mathematical computations and logic functions necessary to deliver proper EGR flow. The CPU commands operation of EGR system, torque converter clutch, and the diagnostic system.

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