New energy commercial vehicle fault diagnosis system based on VTCU controller

The utility model relates to a new energy commercial vehicle fault diagnosis system based on a VTCU controller, which belongs to the technical field of vehicle fault diagnosis, and comprises a fault data acquisition module, a data transmission module, a fault diagnosis module and a fault analysis module, and the fault analysis module comprises a CAN signal acquisition card and a new energy commercial vehicle VTCU upper computer. An active diagnosis signal is sent to a fault acquisition module through a VTCU active test unit of a new energy commercial vehicle VTCU upper computer, so that each acquisition unit of the fault acquisition module acquires a corresponding to-be-diagnosed part in a whole vehicle in a whole vehicle running state; according to the method and the system, vehicle operation data are acquired, fault diagnosis is carried out on the acquired vehicle operation data through the new energy commercial vehicle VTCU controller and each fault diagnosis unit, and analysis is carried out through the n