METHOD AND SYSTEM FOR GLOW PLUG OPERATION

A method (600) for operating a glow plug includes controlling (602) a temperature of the glow plug by switching between applying a voltage V (608) and applying a voltage V < V (606) to the glow plug. Applying the voltage V (608) and applying the voltage V (606) causes a glow plug current to oscillate about a glow plug current threshold. The glow plug current threshold is associated with one of the voltage V and the voltage V. The method (600) includes monitoring (604) the glow plug current at the one of the voltage V and the voltage V.