Mike's Workshop Manuals
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Cadillac
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1987
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Seville
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Repair and Diagnosis
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Engine Performance
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System
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DFI ECM Tests W/Codes
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Diagnosis & Testing
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Code EO51 - Prom Error
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Action Taken:
Action Taken:
ECM turns on "SERVICE NOW" light.
PROM not used.
ECM uses CALPAK for backup spark and fuel.
ECM diagnostics disabled. If ECM diagnostics are selected, only code "EO51" will be displayed.