Section 4 (Anti-Theft System): Testing: Notes
WARNING: This page is about a different car, the 1993 Lexus SC 400. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
When using test information, theft deterrent Electronic Control Unit (ECU) connector terminals are identified by circuit function. When testing circuits from theft deterrent ECU connector, always backprobe ECU connector. If theft deterrent system is still malfunctioning after performing test procedures, see TROUBLE SHOOTING.