The invention discloses a vehicle-mounted fault diagnosis
system, method and device and a storage medium, and relates to the technical field of
rail transit, and the method comprises the steps: configuring
system basic parameters through a data preloading module, so as to control the
system to start and operate according to the system basic parameters; the log analysis module receives the running log of the
train, analyzes the log, obtains abnormal events of a
train subsystem and a vehicle-mounted controller, and obtains basic fault information based on the abnormal events; the alarm module performs
verification and fault hardware positioning on the basic fault information, obtains a fault positioning result and generates alarm information; the
database management module queries a
downtime log or / and an event log according to a fault positioning result, and constructs an event curve to determine a fault reason; the parameter tracking module tracks the event curve and judges whether the fault has cross-system influence or not; accurate and reliable fault
correlation analysis in a complex scene of multi-system interaction of the
train is realized, so that the fault diagnosis and operation and maintenance efficiency is improved.