Abstract:Volvo articulated truck electrical system adopts the international general on-board electronic control system. When the vehicle self diagnosis system diagnoses the fault and gives the fault code, we can preliminarily determine the fault location through the correlation analysis and correspondence analysis of the basic signal data of the sensor. And at the same time, we can combine the vehicle fault phenomenon indicated by the fault code with the actual fault phenomenon for comparison, so as to quickly get the correct and reasonable judgment, rather than the fault code as the only basis for troubleshooting.