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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 747 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P E-Series & 99P F450/550)) >> Pinpoint Test AO: Injector Control Pressure Too High >> Introduction >> Signal Function

Signal Function

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The injector control pressure is determined by the injection pressure regulator (IPR). The IPR is a variable position valve that controls injection control pressure. 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 is in the ON position. Valve position is controlled by switching the output signal circuit to ground. The ON/OFF time is modulated from 0% to 65% dependent upon the desired control pressure.

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