Signal Function

The injector control pressure (ICP) is controlled by the injection pressure regulator (IPR). The powertrain control module (PCM) uses many input variables to determine the desired control pressure.

Battery voltage is supplied to the IPR when the ignition switch is in the ON position. The valve position is controlled by switching the output signal circuit to ground. The ON/OFF time is modulated from 0% to 65%, depending upon the desired control pressure.