Systems and methods for fuel level indicator functional diagnostics

摘要

A method for a fuel system comprises receiving a first indication of inconsistency in a fuel level indicator output during a fuel consumption cycle, receiving a second indication of inconsistency in a fuel level indicator output during a refueling event, and indicating electrical degradation of the fuel level indicator responsive to the first and second indications of inconsistency indicating coincident ranges of inconsistency for the fuel level indicator output. By gauging the consistency of a fuel level indicator output during both upward and downward travel, electrical degradation may be distinguished from mechanical degradation. In this way, a range of inconsistency may be determined, and a reported fuel level adjusted while the fuel level indicator output is within the range of inconsistency.

主权项

1. A method for a fuel system, comprising:
receiving, at a controller, a first indication of inconsistency in a fuel level indicator output signal during a fuel consumption cycle; receiving, at the controller, a second indication of inconsistency in a fuel level indicator output signal during a refueling event; and indicating, via the controller, electrical degradation of the fuel level indicator responsive to the first and second indications of inconsistency comprising coincident ranges of inconsistency for the fuel level indicator output signal.