The ignition system uses individual ignition coil/module assemblies for each cylinder. The Powertrain Control Module (PCM) controls the individual coils by transmitting timing pulses on the Ignition Control (IC) circuit of each ignition coil/module to enable a spark event. The PCM monitors each IC circuit for improper voltage levels. Each ignition coil/module has the following circuits: An ignition voltage circuit, a ground, an IC circuit, and a low reference circuit. No adjustment is necessary or possible.