Abstract: A system and method for selectively limiting at least one operational characteristic, such as maximum speed, of a vehicle. A vehicle limitation control signal is supplied to the vehicle over a wireless communication network. In response to the limitation control signal, the maximum speed of the vehicle is limited.

Abstract: A PC-based diagnostic system is modular-based, and includes a motherboard, a backplane board, a PCMCIA board, and a keypad adapter board. The motherboard communicates with I/O modules connected to the backplane board, PCMCIA modules connected to the PCMCIA board, and with a keypad or a mouse through the keypad adapter board. Based on the type of device to be tested, various diagnostic programs can be accessed internally to provide the signals used to perform the test. A system controller and a processor are provided on the motherboard to control the transfer of data and control from the motherboard, through the backplane, and to the I/O modules. Additional select lines are provided to select one or more I/O modules during a test. An ISA bus is also provided in a standard arrangement.

Abstract: A vehicular diagnostic system is described which generally comprises a portable communications control station and a remote data processing station. The control station includes a portable communications controller which is adapted to be connected to a vehicle data terminal capable of supplying parameter data monitored by a vehicle computer and connected to a source of electrical power in the vehicle. The controller also includes the circuitry required to enable the flow of the parameter data through the vehicle data terminal, to compose the data into a predetermined data stream, to record this data stream on magnetic tape, and transmit live or recorded data through a telephone line to the remote data processing station.