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Cadillac
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1992
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Seville Base
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Tests W/Codes
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Diagnostic Parameters
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Pcm Specific Data Codes
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ED99: PCM Programmable Read Only Memory (PROM) Id Code
ED99: PCM Programmable Read Only Memory (PROM) Id Code
Display shows a 3-digit code identifying PROM portion of MEM-CAL unit.
Fig 1: PCM Harness Connector 2-A/B (Black)
Courtesy of GENERAL MOTORS
Fig 2: PCM Harness Connector 3 E/F (Green)
Courtesy of GENERAL MOTORS CORP.
Fig 3: PCM Harness Connector 1 C/D (Black)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Dash To PCM Connector & Engine To FWD LP Connector
Courtesy of GENERAL MOTORS CORP.