Engine Control Module Programming

An engine immobilizer system may be used. On models equipped with engine immobilizer system, if engine control module (ECM) is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. Models equipped with engine immobilizer system may be identified by looking at ignition key. On models equipped with engine immobilizer system, top of ignition key is thicker than a standard ignition key, as a transponder chip is incorporated into top of ignition key. For programming procedures, see COMPUTER RELEARN PROCEDURES - TOYOTA article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.