Engine Control Module (ECM)
WARNING: This page is about a different car, the 1990 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
For installation and removal of the ECM, see REMOVAL, OVERHAUL & INSTALLATION article.
For diagnostic and testing procedures, see PFI CHART C-1: ECM REPLACEMENT CHECK in SELF-DIAGNOSTICS article.