Spark Test: Notes

NOTE: On Avalon, Camry, Camry Solara, Highlander, Land Cruiser, Sequoia, Sienna and 4Runner, an engine immobilizer system may be used. When performing spark test, it may be necessary to substitute or replace Engine Control Module (ECM). On models with engine immobilizer system, if 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.