OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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Reverting ValveIn order to reverse the reductant flow direction (for line purge) a 4-2-way valve (reverting valve) needs to beswitched. The valve is switched by a solenoid.Reverting valveSolenoidFilterPumpReverting Valve Circuit Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP20A0 – Reductant Purge Control Valve Circuit / OpenP20A3 – Reductant Purge Control Valve Circuit HighP20A2 – Reductant Purge Control Valve Circuit LowContinuous – Open and Low with driver off / High with driver onnonenone2 seconds to register a malfunctionTypical Reverting Valve Circuit Check Malfunction Thresholds:Fault is determined by power stage driver.P20A0 – Reductant Purge Control Valve Circuit / Open - < 5.80 voltsP20A3 – Reductant Purge Control Valve Circuit High - > 2.20 ampsP20A2 – Reductant Purge Control Valve Circuit Low - < 3.50 voltsFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 124 OF 157
The reverting valve functional check monitors the pressure drop when the purge cycle is started. To run this testthe pressure level must exceed a calibration threshold (280 kPa) at beginning of test. For a successful test result,the pressure must drop by another threshold (230 kPa) within the time.If the test is not successfully passed the purge cycle will be terminated immediately because of the risk ofuncontrolled injection of reductant into the exhaust pipe.Reverting Valve Functional Check Operation:DTCsMonitor executionMonitor SequenceSensors/Actuators OKMonitoring DurationP20A1 - Reductant Purge Control Valve PerformancecontinuousP20A1 is inhibited by active P20A0 , P20A3 or P20A2reductant pump pressure sensor, reductant injector, reductantpump motor5 sec for fault detectionTypical Reverting Valve Functional Check Malfunction Thresholds:P20A1: initial pressure > 280 kPaMin. pressure drop < 230 kPa errorFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 125 OF 157
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2013 MY OBD System OperationSummary
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Cam and Crank Sensor: .............
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Introduction - OBD-II and EMDOBD-II
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Comprehensive Component MonitorGlow
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System Schematic 6.7L Chassis Certi
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The dynamometer certified applicati
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NON-METHANE HYDROCARBON (NMHC) CONV
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OXIDES OF NITROGREN (NOx) CONVERTIN
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Selective Catalyst Reduction Feedba
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Misfire Monitor Operation:DTCsMonit
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Fuel Rail Pressure ( FRP ) Rational
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Fuel Temperature Sensor Circuit Che
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Fuel Pressure Control Valve (PCV) M
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Fuel Injector Driver Circuit Monito
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Injector Code Missing/Invalid:Injec
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Injection Timing / Injection quanti
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Feedback control:Fuel Balancing Con
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VoltageNominal Voltage Calibration:
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EXHAUST GAS SENSOR MONITORAir-Fuel
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The NOx sensor is primarily used to
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percent O2P0133 (O2 slow response)
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EXHAUST GAS RECIRCULATION (EGR) SYS
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EGR Cooler/ECB Entry Conditions (Ov
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EGR System Slow ResponseSlow respon
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Mass Airflow Closed-loop Control Li
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Note: this monitor also serves to m
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Functional Overboost MonitoringThe
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Threshold Underboost MonitoringThe
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PARTICULATE MATTER (PM) FILTER MONI
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DPF Incomplete Regeneration Monitor
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DPF Restriction MonitorThe DPF is m
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Mass Air Flow Sensor Functional Che
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Warm-up profiles with nominal therm
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Primary Coolant Temp Dynamic Monito
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COLD START EMISSION REDUCTION STRAT
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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 84 and 85: Turbine Upstream Pressure Sensor Pl
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 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
Page 132 and 133: Typical Engine Control Unit (ECU) M
Page 134 and 135: Lack of Communication Codes:CAN Com
Page 136 and 137: Glow PlugsThe diesel engine uses gl
Page 138 and 139: Glow Plug Circuit Open Load Check O
Page 140 and 141: Glow Plug Circuit Resistance Out of
Page 142 and 143: Miscellaneous ECU Errors:VID Block
Page 144 and 145: Most vehicle applications no longer
Page 146 and 147: Transmission Fluid Temperature Sens
Page 148 and 149: Shift Solenoid Functional Check Ope
Page 150 and 151: Pressure Control Solenoid Check Ope
Page 152 and 153: Transmission OutputsShift Solenoids
Page 154 and 155: On Board Diagnostic ExecutiveThe On
Page 156 and 157: I/M Readiness CodeThe readiness fun
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OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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