Apparatus for controlling and diagnosing a prime mover of a vehicle traction system includes an alternator having a rotor and coupled to a crankshaft of the prime mover, a source of electrical energy, a position sensor supplying a position signal representative of an angular position of the rotor, and a control computer. The method includes replacing the set of structurally similar summaries with a coarse summary. High energy implantation processes on the order of 1 MeV to 3 MeVs can be used to implant the ions in embedded regions.