An internal combustion engine includes a controllable throttle control device and controllable engine valves. The intrusion detection system, in some aspects, includes a network interface; one or more processors communicatively coupled to the network interface; system memory communicatively coupled to the processors. Furthermore, the mobile unit is configured to evolve to a temporary deactivation state whenever a communication unavailability condition of the tracking signal through the communication system occurs. At least one of the first processing element and the second processing element is accessible directly only from within the system to unify access to the two elements.