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Home >> Chevrolet >> 1981 >> Chevette Scooter, Automatic Trans, Trans Mfr CD 200C/MV9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Computer Command Control >> Operation >> Electronic Control Module (ECM) >> Central Processing Unit (CPU)
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Central Processing Unit (CPU)

Digital signals received by CPU are used to perform all mathematical computations and logic functions necessary to deliver proper air/fuel mixture. The CPU also calculates spark timing and idle speed information. The CPU commands operation of emission control, closed loop fuel control and diagnostic system.

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