Mobile transport robots are employed for a flexible flow of materials in industrial production. In order to minimize standstill periods in case of defects, the causes are to be analyzed remotely to reduce the time for repair. This paper addresses a telediagnosis infrastructure, allowing a remote service center to receive the crucial sensor data, to submit control commands to the vehicle for tests and to initiate the repair process. The control electronics and the software implementation for this generic telemaintenance approach via internet will be reviewn, as well as experiences in its industrial use.