Immobilizer Control System
CIRCUIT DESCRIPTIONThe immobilizer control system is an anti-theft device which enables the starting to be possible only when the mechanical and wireless secret codes, memorized in the Engine Control Module, and the Immobilizer Control Module (ICM), are aligned simultaneously.
The transponder (built-in the ignition key) sends unique frequency secret code signals to the ICM through Antenna coils.
The ICM compares the received code signals with memorized code. When the codes are aligned, the ICM sends signals to the ECM so that the starting is possible through fuel injection control. The immobilizer control module has a built-in self diagnostic feature.