| 摘要 |
An anti-theft security system for an off-road vehicle is disclosed. The system includes a master control module, which may be part of the vehicle's instrument cluster, and a remotely located security module, which is directly adjacent to at least one electrically-operated actuator of the vehicle normally operated as part of transporting the vehicle to another location. The security module includes a tamper-resistant housing which obstructs physical access to at least part of the actuator. The master module, which may include a microprocessor and LED display, has an operator interface such as a keypad for entering a first access code known only to authorized operators of the vehicle. When the sequence of entered keystrokes matches the first access code stored within the master module, the module automatically generates and transmits to the security module a signal containing a second and different access code. When the security module determines that the received signal is coded with the same second access code stored within its memory, a power switch within the security module is energized, thereby providing electrical power to the actuator so that the vehicle may be moved. The second access code contained in the signal transmitted between modules may be an analog signal encoded by using a special voltage, frequency or waveform, or a serial digital signal encoded with a multi-bit code. To further improve security, the master module is arranged to allow the first access code stored therein to be reprogrammed when a special sequence of keystrokes is entered.
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