Data acquisition and fault diagnosis terminal for vehicle

The utility model discloses a data acquisition and fault diagnosis terminal for a vehicle. The terminal comprises a power management unit, an SCM (single chip machine) core control unit, a clock unit, a voice unit, a storage unit, a push-button unit, an LCD (liquid crystal display) unit and an interface unit. The terminal adopts a CAN bus and a K-line to carry out data acquisition in the vehicle, and an IO(input-output) interface is reserved to acquire the signals acquired by the CAN bus and the K line so as to enable a controller to acquire more useful signals in the vehicle. The acquired data can be stored by an SD (secure digital) card or USB (universal serial bus), and also can be transmitted to a remote server through 3G (3rd generation telecommunication)/GPRS (general packet radio service) in real time to be stored so as to realize the large capacity data storage. The terminal can automatically recognize engine types or part types of a plurality of companies. A tester can transmit GPS (global positioning system) positioning information back through a GPRS wireless communication unit arranged in the terminal so as to monitor road test conditions in real time by a far-end server.