OBD Operation Summary for 6.7L Diesel - MotorCraftService.com
OBD Operation Summary for 6.7L Diesel - MotorCraftService.com OBD Operation Summary for 6.7L Diesel - MotorCraftService.com
Typical Entry Conditions:Entry condition Minimum MaximumSCR Feedback Control EnabledShort term efficiency 0.2Short term to long term efficiency delta 0.1Regeneration Cycle Not RequestedEngine coolant temperatureAmbient air temperature70 deg C-6.7 degCBarometric Pressure 82.5 kPa 120 kPaEngine Speed 1000 rpm 3000 rpmTorque Transients -30 N-m/s, +10 N-m/sExhaust Space Velocity 5000 120,000SCR Inlet temp 200 degC 350 degCDEF storage 30% understored 40% overstoredDiesel Exhaust Fluid refill detected (only forReductant Quality Performance monitor)Typical Malfunction Thresholds:P20EE: If the cumulative efficiency of the SCR Catalyst is less than 25% for approx 60 seconds., a fault isindicated.P207F: the short term Nox efficiency needs to be less than 0.20 and the delta between short and long termefficiency needs to be greater than 0.10. This generally occurs in a highway drive cycle within 15 miles whenconditions are present.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 16 OF 157
Selective Catalyst Reduction Feedback Control MonitorsThe SCR system is monitored to ensure the proper closed loop control of the reductant injection. As part of thereductant injection control, a correction factor is adapted to account for long term drift of the system (injector, etc).This correction factor is monitored continuously. If the correction factor reaches a threshold in the positive ornegative direction for a sufficient period of time, a fault will be indicated.A SCR Time to Closed Loop monitor is implemented to ensure that SCR feedback occurs when expected. Onceentry conditions are met, a timer is incremented. If the fraction of time in closed loop control is less than athreshold, a fault is indicated.Monitor Summary:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP249D – SCR Feedback at Minimum LimitP249E – SCR Feedback at Maximum LimitP249C – SCR Time to Closed LoopContinuousNoneNOx, EGT12, EGT13,TCO, EGT11 EGT14, MAF, BP, IAT, DPFP,and EGR system5 minutesTypical Entry Conditions:Entry condition Minimum MaximumLow Temp Adaptation is enabled(Feedback monitor only)Engine speed 800 rpm 3000 rpmTorque set point 0 Nm 1000 NmBarometric pressureAmbient temperatureEngine coolant temperature75 kPa-6.7 deg C70 deg CSCR temperature 160 deg C 900 deg CTypical Malfunction Thresholds:P249D: If the correction factor is clipped at its minimum value for 30 seconds then a fault is indicated.P249E: If the correction factor is clipped at its maximum value for 5 minutes then a fault is indicated.P249C: The error is set as soon as the fraction of closed loop operation vs expected is less than the threshold.The monitor needs to run for 120 seconds to call it complete.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 17 OF 157
- Page 1 and 2: 2013 MY OBD System OperationSummary
- Page 3 and 4: Cam and Crank Sensor: .............
- Page 5 and 6: Introduction - OBD-II and EMDOBD-II
- Page 7 and 8: Comprehensive Component MonitorGlow
- Page 9 and 10: System Schematic 6.7L Chassis Certi
- Page 11 and 12: The dynamometer certified applicati
- Page 13 and 14: NON-METHANE HYDROCARBON (NMHC) CONV
- Page 15: OXIDES OF NITROGREN (NOx) CONVERTIN
- Page 20 and 21: Misfire Monitor Operation:DTCsMonit
- Page 22 and 23: Fuel Rail Pressure ( FRP ) Rational
- Page 24 and 25: Fuel Temperature Sensor Circuit Che
- Page 26 and 27: Fuel Pressure Control Valve (PCV) M
- Page 28 and 29: Fuel Injector Driver Circuit Monito
- Page 30 and 31: Injector Code Missing/Invalid:Injec
- Page 32 and 33: Injection Timing / Injection quanti
- Page 34 and 35: Feedback control:Fuel Balancing Con
- Page 36 and 37: VoltageNominal Voltage Calibration:
- Page 38 and 39: EXHAUST GAS SENSOR MONITORAir-Fuel
- Page 40 and 41: The NOx sensor is primarily used to
- Page 42 and 43: percent O2P0133 (O2 slow response)
- Page 44 and 45: EXHAUST GAS RECIRCULATION (EGR) SYS
- Page 46 and 47: EGR Cooler/ECB Entry Conditions (Ov
- Page 48 and 49: EGR System Slow ResponseSlow respon
- Page 50 and 51: Mass Airflow Closed-loop Control Li
- Page 52 and 53: Note: this monitor also serves to m
- Page 54 and 55: Functional Overboost MonitoringThe
- Page 56 and 57: Threshold Underboost MonitoringThe
- Page 58 and 59: PARTICULATE MATTER (PM) FILTER MONI
- Page 60 and 61: DPF Incomplete Regeneration Monitor
- Page 62 and 63: DPF Restriction MonitorThe DPF is m
- Page 64 and 65: Mass Air Flow Sensor Functional Che
Selective Catalyst Reduction Feedback Control MonitorsThe SCR system is monitored to ensure the proper closed loop control of the reductant injection. As part of thereductant injection control, a correction factor is adapted to account <strong>for</strong> long term drift of the system (injector, etc).This correction factor is monitored continuously. If the correction factor reaches a threshold in the positive ornegative direction <strong>for</strong> a sufficient period of time, a fault will be indicated.A SCR Time to Closed Loop monitor is implemented to ensure that SCR feedback occurs when expected. Onceentry conditions are met, a timer is incremented. If the fraction of time in closed loop control is less than athreshold, a fault is indicated.Monitor <strong>Summary</strong>:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP249D – SCR Feedback at Minimum LimitP249E – SCR Feedback at Maximum LimitP249C – SCR Time to Closed LoopContinuousNoneNOx, EGT12, EGT13,TCO, EGT11 EGT14, MAF, BP, IAT, DPFP,and EGR system5 minutesTypical Entry Conditions:Entry condition Minimum MaximumLow Temp Adaptation is enabled(Feedback monitor only)Engine speed 800 rpm 3000 rpmTorque set point 0 Nm 1000 NmBarometric pressureAmbient temperatureEngine coolant temperature75 kPa-6.7 deg C70 deg CSCR temperature 160 deg C 900 deg CTypical Malfunction Thresholds:P249D: If the correction factor is clipped at its minimum value <strong>for</strong> 30 seconds then a fault is indicated.P249E: If the correction factor is clipped at its maximum value <strong>for</strong> 5 minutes then a fault is indicated.P249C: The error is set as soon as the fraction of closed loop operation vs expected is less than the threshold.The monitor needs to run <strong>for</strong> 120 seconds to call it <strong>com</strong>plete.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 17 OF 157
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