Antitheft and Alarm Systems: Application and ID

GLOSSARY

Blocked :
State of BCM Immobilizer function, in which the vehicle should be immobilized.
In this state, cranking is not possible if the optional cranking relay is present.

Released :
State of BCM Immobilizer function, in which the vehicle can be mobilized.
In this state, cranking is possible.

Locked :
State of ECM Immobilizer function, in which the starting and running of the engine is disabled; immobilizing actions are executed.

Unlocked :
State of ECM Immobilizer function, in which the starting and running of the engine is enabled in a normal way.

Release message communication :
Communication phase between BCM and ECM during which Immobilizer status and information are exchanged.

MIN code : Model Identification Number

VIN code : Vehicle Specific Identification Number (VIN)

PIN code : P Identification Number (Vehicle Secret Code) 6 digit decimal numbers that are saved in BCM via diagnostic tool at service center. It is used to teach the key.

User Password :
4 digit decimal numbers that are saved in BCM EEPROM via diagnostic tool at service center. Only learnt BCM can save this ' User Password' , and this ' User Password' only makes ' Released' Status at' Limp Home Mode'.

Challenge :
The Random number (40bits), which BCM sends to Transponder.

Transponder Serial Number:
The Unique numbers (24bits) which are stored in Transponder memory.

Signature :
The calculation result (24bits), and Transponder calculates this value based on Challenge and Encryption Key.

Transponder Response :
The transponder response which is composed with Transponder Serial Number and Signature.

BCM : Body Control Module.

ECM : Engine Control Module.

KTR :
Secret Encryption Key programmed into Transponder memory and used for encrypted communication.