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
Turbine Upstream Pressure Sensor Plausibility ChecksThe turbine upstream pressure sensor has plausibility checks to make sure that the sensor is not stuck in a range.If the ambient pressure is above a threshold, the monitor determines if there is warm or cold weather based onengine coolant and environmental temperature. In the case of high altitude or cold weather, the engine off timerand difference between the engine coolant and environmental temperatures are compared to thresholds todetermine if the pressure sensor may be frozen. At key-on the turbine upstream pressure sensor reading iscompared with the ambient pressure sensor reading, if the difference is greater than a calibrated threshold anambient offset error condition is flagged. If the sensor may be frozen, the engine is operated with reduced torqueuntil the sensor is determined to be in a thawed state. Once thawed, the turbine upstream pressure sensor iscompared with a modeled pressure under a calibrated window of engine speed and load. If the differencebetween the sensor and model is greater than a calibrated threshold, then a model offset error is present and amalfunction is detected. If an ambient offset error at start is present when the sensor is not frozen, then amalfunction is detected. If a model offset error is detected when the sensor is thawed, then a malfunction isdetected. Model offset error detection is not conducted under high transient mass airflow conditions, or at highaltitude.Turbine Upstream Pressure Sensor Plausibility Check Operation:DTCsMonitor executionMonitor SequenceMonitoring Duration for stuck midrangeP006D– Barometric Pressure Turbocharger/Supercharger InletPressure CorrelationP0471– Exhaust Pressure Sensor "A" Circuit Range/PerformanceOnce per driving cycleNone1.0 seconds to register a malfunctionDetection of a Frozen Turbine Upstream Pressure SensorFor Frozen Condition: Minimum MaximumEngine-off time (soak time)Engine Coolant TemperatureAmbient Air TemperatureAbsolute difference between Ambient Air and Engine CoolantTemperature480 min5 o C5 o C20 o CDetection of a Thawed Turbine Upstream Pressure Sensor for Model Offset Plausibility Check:Entry Condition Minimum MaximumRate of change of Mass Airflow100 kg/hr/secEngine Coolant Temperature50 o CAmbient Air Temperature5 o CEngine Speed 1500 rpm 3000 rpmEngine Torque 500 N-m 750 N-mFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 84 OF 157
Environmental Pressure760 hPaTypical Upstream Turbine Pressure Sensor Plausibility Check Malfunction Thresholds:P006D- (Turbine Pressure Sensor – Ambient Pressure Sensor) at Start > 80 hPa, and sensor is thawed thenerror is setP0471 - (Turbine Pressure Sensor – Modeled Pressure) > 1000hPa, then sensor is stuck in rangeUpstream Turbine Pressure Sensor Signal Range CheckReductant Pressure Sensor Open/Short Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0472 - Exhaust Pressure Sensor "A" Circuit LowP0473 - Exhaust Pressure Sensor "A" Circuit HighContinuousnonenone2 seconds to register a malfunctionTypical Reductant Pressure Sensor Check Malfunction Thresholds:Pressure sensor voltage < 0.100 volts or Pressure sensor voltage > 4.8 voltsFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 85 OF 157
- 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
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- 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
- Page 66 and 67: Warm-up profiles with nominal therm
- Page 68 and 69: Primary Coolant Temp Dynamic Monito
- Page 70 and 71: COLD START EMISSION REDUCTION STRAT
- Page 72 and 73: FBC operates in closed-loop control
- Page 74 and 75: Engine SensorsAir Temperature Ratio
- Page 76 and 77: Ambient Air Temperature (AAT) Senso
- Page 78 and 79: Charge Air Cooler Temperature (CACT
- Page 80 and 81: EGR Cooler Downstream Temperature R
- Page 82 and 83: Barometric Pressure and Manifold Ab
- Page 86 and 87: EGR Valve Position SensorAnalog inp
- Page 88 and 89: Engine Coolant & Engine Oil Correla
- Page 90 and 91: Engine Oil Temperature (EOT) Sensor
- Page 92 and 93: Typical Camshaft and Crankshaft Sen
- Page 94 and 95: Typical Fan and Fan Speed Sensor Ch
- Page 96 and 97: MAF Rationality CheckA rationality
- Page 98 and 99: Mass Air Flow Sensor Plausibility C
- Page 100 and 101: Reductant Pressure Sensor Signal Ra
- Page 102 and 103: DEF System Pressure ControlDEF pres
- Page 104 and 105: Reductant Tank Level Sensor Circuit
- Page 106 and 107: Reductant Tank Temperature Circuit
- Page 108 and 109: Exhaust Gas Temperature Sensor Rati
- Page 110 and 111: Exhaust Gas Temperature Rationality
- Page 112 and 113: Diesel Particulate Filter Pressure
- Page 114 and 115: Typical Actuator Jammed Valve Entry
- Page 116 and 117: ECB Valve Actuator Signal Range Che
- Page 118 and 119: Reductant Pump MotorThe Reductant P
- Page 120 and 121: Reductant Pump Motor Circuit Checks
- Page 122 and 123: Reductant Dosing Valve Circuit Chec
- Page 124 and 125: Reverting ValveIn order to reverse
- Page 126 and 127: Urea HeatersAqueous urea water solu
- Page 128 and 129: Additional plausibility check for h
- Page 130 and 131: Engine Control Unit (ECU) Monitor O
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Environmental Pressure760 hPaTypical Upstream Turbine Pressure Sensor Plausibility Check Malfunction Thresholds:P006D- (Turbine Pressure Sensor – Ambient Pressure Sensor) at Start > 80 hPa, and sensor is thawed thenerror is setP0471 - (Turbine Pressure Sensor – Modeled Pressure) > 1000hPa, then sensor is stuck in rangeUpstream Turbine Pressure Sensor Signal Range CheckReductant Pressure Sensor Open/Short Check <strong>Operation</strong>:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0472 - Exhaust Pressure Sensor "A" Circuit LowP0473 - Exhaust Pressure Sensor "A" Circuit HighContinuousnonenone2 seconds to register a malfunctionTypical Reductant Pressure Sensor Check Malfunction Thresholds:Pressure sensor voltage < 0.100 volts or Pressure sensor voltage > 4.8 voltsFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 85 OF 157
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