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Home >> Cadillac >> 1987 >> DeVille 4D Sedan >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DFI Theory/Operation (4.1L) >> Description & Operation >> Electronic Control Module (ECM) Operation >> Notes
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Electronic Control Module (ECM) Operation: Notes

The ECM monitors and controls all DFI system functions. The ECM consists of input/output devices, Central Processing Unit (CPU), power supply and memories. A brief description and operation of each component is as follows:

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