A method for detecting speed faults in {HEAD ~ a hybrid powertrain} having engine and electric machine speed inputs includes directly sensing the engine and machine speeds and performing comparisons of sensed engine speed with engine speed determined based upon {TAIL ~ the machine speeds} 
A method for detecting speed faults in { HEAD ~ a hybrid powertrain } having engine and electric machine speed inputs includes directly sensing the engine and machine speeds and performing comparisons of sensed engine speed with engine speed determined based upon { TAIL ~ the machine speeds }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL