ICM (Immobilizer Control Module)
The ICM carries out communication with the built-in transponder in the ignition key. This wireless communication runs on RF (Radio frequency of 125 kHz). The ICM is mounted at the behind of the crush pad under panel close to the antenna coil for RF transmission and receiving.
The ICM carries out a check of the ignition key using a special encryption algorithm, which is programmed into the transponder as well as the ICM simultaneously. Only if the results are equal, transmits the signal to the ECM to permits injection. The data of all transponders, which are valid for the vehicle, are stored in the ICM.
[SHINCHANG TYPE]