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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 744 (Engine Controls - Diagnostic Methods - 6.0L Diesel (99P E-Series & 99P F450/550)) >> Quick Test Description >> Key On Engine Running (KOER) On-Demand Self-Test

Key On Engine Running (KOER) On-Demand Self-Test

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Key On Engine Running (KOER) On-Demand Self-Test is a functional test of the PCM performed on demand with the engine running. Temperature is not a factor, but A/C must be turned off. A check is made on the injection control pressure (ICP) variable geometry turbocharger (VGT), and exhaust gas recirculation (EGR) systems. During this test, engine RPM can vary. A fault must be present at the time of testing for the KOER On Demand Self-Test to detect a fault. If a fault is detected, a Diagnostic Trouble Code (DTC) will be the output on the data link at the end of the test when requested by a scan tool. Only a hard fault code (DTC) will be displayed.

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