Content Theft Deterrent System & Immobilizer: ECM
WARNING: This page is about a different car, the 2000 Cadillac Catera and 1999 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
ECM must be programmed after installation. New ECMs are delivered with status immobilizer deactivated. Programming immobilizer signal into ECM activates immobilizer function.