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Fail operational power system diagnostics

  • US 9,911,249 B2
  • Filed: 09/03/2013
  • Issued: 03/06/2018
  • Est. Priority Date: 09/20/2012
  • Status: Active Grant
First Claim
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1. Method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) load, comprising:

  • providing said FOPS module with first and second independent power sources, and first and second parallel power distribution paths, each power distribution path powered by one of said independent power sources;

    providing said FOS load with first and second FOS modules, each FOS module respective to one of said first and second power distribution paths;

    requesting, at the FOS modules, a microcontroller of the FOPS module to generate a diagnostic control signal;

    receiving, at the FOS modules, diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller; and

    executing, at the FOS modules, isolator diagnostics based on the received diagnostic information.

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