Vehicle fault diagnosis and analysis based on augmented design failure mode and effect analysis (dfmea) data

A method of performing fault diagnosis and analysis for one or more vehicles, comprising the steps of:

• obtaining design failure mode and effect analysis (DFMEA) data, wherein the DFMEA data specifies a plurality of failure modes including first subsystem failure modes and second subsystem failure modes;
• receiving diagnostic association data, wherein the diagnostic association data specifies, for each of a first set of the plurality of failure modes, one or more diagnostic trouble code(s) (DTC(s)) that are to be associated with the failure mode;
• receiving vehicle operation signals association data, wherein the vehicle operation signals association data specifies, for each of a second set of the plurality of failure modes, vehicle operation signals data that is to be associated with the failure mode;
• generating augmented DFMEA data that indicates the DTC(s) that are observable at the one or more vehicles when the one or more vehicles are experiencing any failure mode(s) of the first set of failure modes, and that indicates the vehicle operation signals data that is observable at the one or more vehicles when the one or more vehicles are experiencing any failure mode(s) of the second set of failure modes, wherein the augmented DFMEA data is generated based on the DFMEA data, the diagnostic association data, and the vehicle operation signals association data;
• generating a dependency model based on the augmented DFMEA data, wherein the dependency model indicates causal relationships between the first subsystem failure modes and the second subsystem failure modes;
• and
• performing fault diagnosis and analysis for the one or more vehicles using the augmented DFMEA data.

A vehicle fault diagnosis and analysis system, comprising:

• one or more computers each having a processor;
• and
• memory storing computer instructions that are executable by the one or more computers, wherein the memory is communicatively coupled to the one or more computers;
• wherein, when the computer instructions are executed by the one or more computers, the vehicle fault diagnosis and analysis system:
• obtains augmented design failure mode and effect analysis (DFMEA) data that indicates diagnostic data that is observable at one or more vehicles when the one or more vehicles are experiencing any failure mode(s) of a first set of failure modes, and that indicates vehicle operation signals data that is observable at the one or more vehicles when the one or more vehicles are experiencing any failure mode(s) of a second set of failure modes, wherein the augmented DFMEA data is generated based on DFMEA data, diagnostic association data, and vehicle operation signals association data;
• and
• performs fault diagnosis and analysis for the one or more vehicles using the augmented DFMEA data.