Section 11 (Engine Control System Self-Diagnostics - 4-Cylinder): Programming
WARNING: This page is about a different car, the 2002 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
If Engine Control Module (ECM) is replaced and vehicle is equipped with an engine immobilizer system, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.