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
The ECT warm-up time is also monitored. If ECT fails to reach a minimum temperature (140 o F) within a specifiedtime period, an “insufficient temp for closed loop” malfunction is indicated (P0125). (See Thermostat monitoringsection.)MiscellaneousLoss of Keep Alive Memory (KAM) power (a separate wire feeding the PCM) results is a P1633 DTC andimmediate MIL illumination on most applications. (Some 2000 MY applications require 2 driving cycles.)Vehicles that require tire/axle information to be programmed into the Vehicle ID block (VID) will store a P1639 if theVID block is not programmed or corrupted.IgnitionDistributor Ignition systems (TFI) are no longer in production. Electronic Ignition systems (Electronic DistributorlessIgnition System - EDIS or Coil on Plug - COP) systems are being used on all applications.The EDIS system uses a chip to process the 36 (or 40) tooth crankshaft position signal, generate a low data ratePIP signal for the PCM microprocessor and control a 4 or 6 terminal coil pack which fires a pair of spark plugs. Oneof these sparkplugs is on the compression stroke, while the other is on the exhaust stroke. The EDIS chip can beincorporated within the PCM or in a separate ignition control module.The COP system also uses an EDIS chip in the same way as described above, however, each sparkplug has it’sown coil which is fired only once on the compression stroke.The ignition system is checked by monitoring three ignition signals during normal vehicle operation:Profile Ignition Pickup (CKP, commonly known as PIP), the timing reference signal derived from thecrankshaft 36-tooth wheel and processed by the EDIS chip. PIP is a 50% duty cycle, square wave signalthat has a rising edge at 10 deg BTDC.Camshaft IDentification (CMP, commonly known at CID), a signal derived from the camshaft to identify the#1 cylinderIgnition Diagnostic Monitor (IDM), a signal that indicates that the primary side of the coil has fired. Thissignal is received as a digital pulse width signal from the EDIS chip. The EDIS chip determines if thecurrent flow to the ignition coil reaches the required current (typically 5.5 Amps for COP, 3.0 to 4.0 Ampsfor DIS) within a specified time period (typically > 200 microseconds for both COP and DIS). The EDISchip also outputs status information when the engine is not running.First, the relationship between successive PIP events is evaluated to determine whether the PIP signal is rational.Too large a change in 3 successive PIP indicates a missing or noisy PIP signal (P0320). Next, the CMP edgecount is compared to the PIP edge count. If the proper ratio of CMP events to PIP events is not being maintained(for example, 1 CMP edge for every 8 PIP edges for an 8-cylinder engine), it indicates a missing or noisy CMPsignal (P0340). Finally, the relationship between IDM edges and PIP edges is evaluated. If there is not an IDMedge (coil firing) for every PIP edge (commanded spark event), the PCM will look for a pattern of failed IDM eventsto determine which ignition coil has failed. If the ignition coil cannot be identified or if the engine is running andthere are no IDM edges, the IDM circuit is malfunctioning (P1351).FORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 40 OF 66
Ignition System Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0320 (CKP),P0340 (CMP)P0351 - P0360 (Coil primary)continuousnone< 5 secondsTypical ignition check entry conditions:Entry Condition Minimum MaximumEngine RPM for CKP, CMP200 rpmEngine RPM for coil primary 200 rpm minimum of 3200 rpmTypical ignition check malfunction thresholds:For PIP: Time between PIP edges: > 350 millisecondsRatio of current PIP period to last two periods: < 0.75, > 1.75For CMP: Ratio of PIP events to CMP events: 4:1, 6:1, 8:1 or 10:1 based on engine cyl.For coils: Ratio of PIP events to IDM events: 1:1FORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 41 OF 66
- Page 2: 4R70W (RWD) Transmission ..........
- Page 6 and 7: TYPICAL INDEX RATIO CATALYST MONITO
- Page 8 and 9: Misfire MonitorThere are two differ
- Page 10 and 11: Misfire Monitor Operation:DTCsMonit
- Page 12 and 13: AIR System MonitorThe secondary air
- Page 14 and 15: leed-up criteria is exceeded on thr
- Page 16 and 17: EVAP System Monitor - 0.020” dia.
- Page 18 and 19: Ford’s 0.020” evaporative syste
- Page 20 and 21: Typical 0.020” EVAP abort (fuel s
- Page 22 and 23: Additional malfunctions that are be
- Page 24: HO2S MonitorFront HO2S SignalThe ti
- Page 27 and 28: HO2S Heaters, front and rearThe HO2
- Page 29 and 30: In the 2002 MY, Ford will introduce
- Page 31 and 32: After the vehicle is started, durin
- Page 33 and 34: Finally, the differential pressure
- Page 35 and 36: EGR flow is monitored using an anal
- Page 37 and 38: Typical EGR flow check entry condit
- Page 39: Comprehensive Component Monitor - E
- Page 43 and 44: The Intake Manifold Runner Control
- Page 45 and 46: Most vehicle applications no longer
- Page 47 and 48: Transmission Fluid Temperature Sens
- Page 49 and 50: Torque Converter Clutch Check Opera
- Page 51 and 52: 4R70W (RWD) Transmission(no turbine
- Page 53 and 54: CD4E (FWD) Transmission(has turbine
- Page 55 and 56: 5R55E (RWD) Transmission(has turbin
- Page 57 and 58: Direct One Way ClutchThe Direct One
- Page 59 and 60: Direct One Way ClutchThe Direct One
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Ignition <strong>System</strong> Check <strong>Operation</strong>:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0320 (CKP),P0340 (CMP)P0351 - P0360 (Coil primary)continuousnone< 5 secondsTypical ignition check entry conditions:Entry Condition Minimum MaximumEngine RPM for CKP, CMP200 rpmEngine RPM for coil primary 200 rpm minimum of 3200 rpmTypical ignition check malfunction thresholds:For PIP: Time between PIP edges: > 350 millisecondsRatio of current PIP period to last two periods: < 0.75, > 1.75For CMP: Ratio of PIP events to CMP events: 4:1, 6:1, 8:1 or 10:1 based on engine cyl.For coils: Ratio of PIP events to IDM events: 1:1FORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 41 OF 66