2002 MY OBD-II System Operation Summary - MotorCraftService.com
2002 MY OBD-II System Operation Summary - MotorCraftService.com
2002 MY OBD-II System Operation Summary - MotorCraftService.com
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In the <strong>2002</strong> <strong>MY</strong>, Ford will introduce a revised DPFE system. It functions in the same manner as the conventionalDPFE system, however, the various system <strong>com</strong>ponents have been <strong>com</strong>bined into a single <strong>com</strong>ponent called theEGR <strong>System</strong> Module (ESM). This arrangement increases system reliability while reducing cost. By relocating theEGR orifice from the exhaust to the intake, the downstream pressure signal measures Manifold AbsolutePressure (MAP). <strong>2002</strong> <strong>MY</strong> implementations will provide the PCM with a differential DPFE signal, identical to theconventional DPFE system. For 2003 <strong>MY</strong> and beyond, the differential signal will be split up and the PCM willreceive both an upstream pressure signal as well as a downstream pressure/MAP signal. This allows the PCM toget access to a MAP signal without adding an additional MAP sensor.PCMNew ESMDPFE EGR SYSTEMEGR <strong>System</strong> Module(ESM) ComponentsDPFEsignalEVRMAP SIGNALEGRVALVEFRESH AIR INLETVREFSig RtnEGR DCP1INTAKE(MAP)MAPDPFESENSORDELTA P = P1 - MAPEXHAUSTFORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 29 OF 66
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