Immobilizer System: General Description: Notes
The immobilizer system consists of the four major components which are Engine Control Module (ECM), Immobilizer Control Unit (ICU), transponder, and scan tool (Tech 2).
This system can be activated by a correctly programmed transponder and starter switch is set to OFF.
This system can be deactivated by a correctly programmed transponder key connected with a correctly programmed ECM and a correctly programmed ICU.
While the system is on:
The starter cut off relay deactivates function of starter, and the fuel injector power source is deactivated also.