ED99: PCM Programmable Read Only Memory (PROM) Id Code

WARNING: This page is about a different car, the 1992 Cadillac Seville and 1992 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

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)

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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.