CAN Based Vehicle Immobilizer

A control module for a vehicle, said control module comprising:

• a. a CAN bus;
• b. a first immobilizer having a first processer, said first immobilizer processor being capable of immobilizing said vehicle, said first immobilizer being inaccessible to an aftermarket supplier;
• and
• c. a second immobilizer having a second processor, said second immobilizer processor being capable of immobilizing said CAN bus, said second immobilizer being installable by said aftermarket supplier;
• whereby said immobilizer processor causes said CAN bus to be “busy” for other control modules, preventing said other control modules from transmitting CAN messages to other control units on said CAN bus, thereby immobilizing said vehicle as said other control modules are unable to perform standard functions due to an inability of said other control modules to communicate with each other.

A method to immobilize one of a plurality of electronic control modules of a vehicle using an immobilizer, said method comprising:

• a. determining if immobilization of one of said plurality of electronic control modules is needed;
• b. selecting which one of said plurality of electronic control modules to immobilize;
• and
• c. causing said CAN bus to be “busy” for communications from other control modules to said one of said plurality of electronic control modules, thereby preventing said other control modules from transmitting CAN messages to said one of said plurality of electronic control modules on said CAN bus, immobilizing said one of said plurality of electronic control modules;
• whereby said immobilizer is installable by an aftermarket supplier, said aftermarket supplier not requiring access to an immobilizer system installed on said vehicle by an OEM.