2005 MY OBD System Operation Summary for Gasoline Engines
2005 MY OBD System Operation Summary for Gasoline Engines 2005 MY OBD System Operation Summary for Gasoline Engines
If an EGR system malfunction is detected above 32 o F, the EGR system and the EGR monitor is disabled for thecurrent driving cycle. A DTC is stored and the MIL is illuminated if the malfunction has been detected on twoconsecutive driving cycles.If an EGR system malfunction is detected below 32 o F, only the EGR system is disabled for the current drivingcycle. A DTC is not stored and the I/M readiness status for the EGR monitor will not change. The EGR monitor,however, will continue to operate. If the EGR monitor determined that the malfunction is no longer present (i.e., theice melts), the EGR system will be enabled and normal system operation will be restored.The differential pressure indicated by the DPFE sensor is also checked at idle with zero requested EGR flow toperform the high flow check. If the differential pressure exceeds a calibratable limit, it indicates a stuck open EGRvalve or debris temporarily lodged under the EGR valve seat (P0402).DPFE EGR Stuck open Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0402once per driving cycleDone after electrical testsCPS, ECT, IAT, MAF, TP10 seconds to register a malfunctionTypical DPFE EGR stuck open check entry conditions:Entry Condition Minimum MaximumEVR dutycycle (EGR commanded off) 0% 0%Engine RPM (after EGR enabled) at idle IdleTypical DPFE EGR stuck open check malfunction thresholds:DPFE sensor voltage at idle versus engine-off signal: > 0.6 voltsJ1979 DPFE EGR Stuck Open Mode $06 DataTest ID Comp ID Description for J1850 Units$45 $20 Delta pressure for stuck open test and threshold voltsConversion for Test ID $45: Multiply by 0.0156 to get A/D counts (0-1024) or 0.0000763 to get voltageMonitor ID Test ID Description for CAN Conventional DPFE Units$31 $84 Delta pressure for stuck open test and threshold kPaFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 48 OF 131
On conventional Delta PFE systems, after the vehicle is started, during vehicle acceleration, the differentialpressure indicated by the DPFE sensor at zero EGR flow is checked to ensure that both hoses to the DPFEsensor are connected. Under this condition, the differential pressure should be zero. If the differential pressureindicated by the DPFE sensor exceeds a maximum positive threshold, a downstream DPFE hose malfunction isindicated (P1406). If the differential pressure falls below a minimum negative threshold, an upstream DPFE hosemalfunction is indicated (P1405).DPFE EGR Hose Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP1405 - Upstream Hose Off or PluggedP1406 – Downstream Hose Off or Pluggedonce per driving cycleAfter P0402 test completedMAF4 seconds to register a malfunctionTypical DPFE EGR hose check entry conditions:Entry Condition Minimum MaximumEVR dutycycle (EGR commanded off) 0% 0%Mass Air FlowInferred exhaust backpressure13 in H 2 O8 lb/minTypical DPFE EGR hose check malfunction thresholds:DPFE sensor voltage: < 7 in H 2 O, > 7 in H 2 OJ1979 DPFE EGR Hose Check Mode $06 DataTest ID Comp ID Description for J1850 Units$42 $11 Delta pressure for upstream hose test and threshold in. H 2 0$42 $12 Delta pressure for downstream hose test and threshold in. H 2 0Conversion for Test ID $42: Take value, subtract 32,768, and then multiply result by 0.0078 to get inches ofH 2 0. The result can be positive or negative.Monitor ID Test ID Description for CAN Conventional DPFE$31 $80 Delta pressure for upstream hose test and threshold kPa$31 $81 Delta pressure for downstream hose test and threshold kPaFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 49 OF 131
- Page 1: Table of ContentsIntroduction - OBD
- Page 4 and 5: !The Catalyst Efficiency Monitor us
- Page 6 and 7: TYPICAL INDEX RATIO CATALYST MONITO
- Page 8 and 9: There are three different misfire m
- Page 10 and 11: 0#1The acceleration that a piston u
- Page 12 and 13: J1979 Misfire Mode $06 DataTest ID
- Page 14 and 15: 0$Secondary air systems typically u
- Page 16 and 17: 201 34536/#/Vehicles that meet enha
- Page 18 and 19: 0.040” EVAP Monitor Operation:DTC
- Page 20 and 21: 201 3536/#/Some vehicles that meet
- Page 22 and 23: slosh. If the monitor aborts, it wi
- Page 24 and 25: 0.020” EVAP Monitor Operation:DTC
- Page 26 and 27: Test ID Comp ID Description for J18
- Page 28 and 29: Ford's EONV implementation for Cali
- Page 30 and 31: 1#4;!In this phase, the EONV test i
- Page 32 and 33: 0.020” EONV EVAP Monitor Operatio
- Page 34 and 35: 201!!#/Additional malfunctions that
- Page 36 and 37: Fuel Tank Pressures Sensor Offset C
- Page 38 and 39: :As fuel system components age or o
- Page 40 and 41: -:-The time between HO2S switches i
- Page 42 and 43: $-A functional test of the rear HO2
- Page 44 and 45: -- 3 amps, (NTK)< 0.400 amps or > 3
- Page 46 and 47: 1:$The Delta Pressure Feedback EGR
- Page 50 and 51: After the vehicle has warmed up and
- Page 52 and 53: 1:$In the 2002.5 MY, Ford introduce
- Page 54 and 55: The ESM may provide the PCM with a
- Page 56 and 57: Next, the differential pressure ind
- Page 58 and 59: I/M Readiness IndicationIf the infe
- Page 60 and 61: The Stepper Motor EGR Monitor consi
- Page 62 and 63: Note: BARO is inferred at engine st
- Page 64 and 65: $. 6The Electric Stepper Motor EGR
- Page 66 and 67: The MAP sensor is also checked for
- Page 68 and 69: When the entry conditions for the f
- Page 70 and 71: 1!2Ford plans to comply with the PC
- Page 72 and 73: ETC System Failure Mode and Effects
- Page 74 and 75: ;#11!%;11!)The purpose of the TPPC
- Page 76 and 77: Currently, vehicles use either an E
- Page 78 and 79: Fuel Rail Pressure Sensor Check Ope
- Page 80 and 81: Loss of Keep Alive Memory (KAM) pow
- Page 82 and 83: CKP Ignition System Check Operation
- Page 84 and 85: The Idle Air Control (IAC) solenoid
- Page 86 and 87: There are several different styles
- Page 88 and 89: The PCM continually calculates a ca
- Page 90 and 91: Most vehicle applications no longer
- Page 92 and 93: Intermediate Shaft Speed Sensor Fun
- Page 94 and 95: Primary Pulley Speed Sensor Functio
- Page 96 and 97: Secondary Pulley Pressure Sensor Ch
On conventional Delta PFE systems, after the vehicle is started, during vehicle acceleration, the differentialpressure indicated by the DPFE sensor at zero EGR flow is checked to ensure that both hoses to the DPFEsensor are connected. Under this condition, the differential pressure should be zero. If the differential pressureindicated by the DPFE sensor exceeds a maximum positive threshold, a downstream DPFE hose malfunction isindicated (P1406). If the differential pressure falls below a minimum negative threshold, an upstream DPFE hosemalfunction is indicated (P1405).DPFE EGR Hose Check <strong>Operation</strong>:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP1405 - Upstream Hose Off or PluggedP1406 – Downstream Hose Off or Pluggedonce per driving cycleAfter P0402 test completedMAF4 seconds to register a malfunctionTypical DPFE EGR hose check entry conditions:Entry Condition Minimum MaximumEVR dutycycle (EGR commanded off) 0% 0%Mass Air FlowInferred exhaust backpressure13 in H 2 O8 lb/minTypical DPFE EGR hose check malfunction thresholds:DPFE sensor voltage: < 7 in H 2 O, > 7 in H 2 OJ1979 DPFE EGR Hose Check Mode $06 DataTest ID Comp ID Description <strong>for</strong> J1850 Units$42 $11 Delta pressure <strong>for</strong> upstream hose test and threshold in. H 2 0$42 $12 Delta pressure <strong>for</strong> downstream hose test and threshold in. H 2 0Conversion <strong>for</strong> Test ID $42: Take value, subtract 32,768, and then multiply result by 0.0078 to get inches ofH 2 0. The result can be positive or negative.Monitor ID Test ID Description <strong>for</strong> CAN Conventional DPFE$31 $80 Delta pressure <strong>for</strong> upstream hose test and threshold kPa$31 $81 Delta pressure <strong>for</strong> downstream hose test and threshold kPaFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 49 OF 131
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