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Home >> Cadillac >> 1988 >> DeVille 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> DFI ECM Tests W/Codes >> Diagnosis & Testing >> Trouble Code Output

Trouble Code Output

After the initial LED segment check, ECM trouble codes stored in the computer will be displayed on the Fuel Data Panel (FDP). Codes will be prefixed with an "E" (ECM) or "F" (BCM) to indicate which computer detected the malfunction. Record all trouble codes displayed. After all trouble codes have been displayed, or there are no trouble codes in the system, a ".7.0" will appear in the display.