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Home >> Cadillac >> 1982 >> Seville 4.1L Eng VIN 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> DFI Control System >> Operation >> Diagnostic System >> Notes
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Diagnostic System: Notes

The ECM of the DFI control system has a built-in diagnostic system to constantly monitor engine/vehicle performance and operation. The diagnostic system consists of 4 tests: Engine malfunction tests, switch tests, engine data displays and output cycling tests. Description of each test is as follows:

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