OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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Mass Air Flow Sensor Functional Check Operation:DTCsMonitor ExecutionMonitor SequenceP00BC – Mass or Volume Air Flow "A" Circuit Range/Performance - AirFlow Too LowOnce per drive cycleNone.Sensors OK MAF (P0100, P0101, P0102), BP (P2228, P2229), EGRP (P0405, P0406,P0404, P0042E, P042F, P1335),Typical Monitoring Duration7 seconds, duration while AMA is active.Typical Malfunction Thresholds:If the measured airflow is less than -10% of anticipated airflow for 3 seconds a fault is detected and the code isset.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 64 OF 157
ENGINE COOLING SYSTEM MONITORINGThermostat MonitorThe Thermostat Monitor checks that the thermostat is operating properly by modeling Engine CoolantTemperature (ECT) based on engine fueling, engine speed, vehicle speed, and the ambient temperature. Thereare increment and decrement portions to the model; the increment is based on engine speed and fuel quantity,while the decrement is derived from calculated radiator efficiency based on coolant delta temp to ambient andvehicle speed. The model is delayed by 60 seconds after engine start to negate potential errors due to block heateruse. It is also suspended while in catalyst warm-up mode due to errors in fuel quantity heat being contributed to thecoolant.Once that estimation reaches the thermostat start-to-open temperature, if the actual measured ECT has notreached a minimum warm-up temperature and the driver has not spent too much time in part fuel cut off (over30%), too low load (over 70%), too high vehicle speed (over 70%), or too low vehicle speed (over 70%) - then thethermostat is determined to be stuck open.Model at 70 deg C 1000seconds into drive cycleModel achieved 90 deg C after1600 seconds, measured coolantonly 30 deg CWarmup at -7 deg C on Unified Drive Cycle, DTC set when modeled temp reaches 90 deg C. Measured coolanttemperature was only at 30 deg C.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 65 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
Page 13 and 14: NON-METHANE HYDROCARBON (NMHC) CONV
Page 15 and 16: OXIDES OF NITROGREN (NOx) CONVERTIN
Page 17 and 18: Selective Catalyst Reduction Feedba
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 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 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
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Typical Actuator Jammed Valve Entry
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ECB Valve Actuator Signal Range Che
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Reductant Pump MotorThe Reductant P
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Reductant Pump Motor Circuit Checks
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Reductant Dosing Valve Circuit Chec
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Reverting ValveIn order to reverse
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Urea HeatersAqueous urea water solu
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Additional plausibility check for h
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Engine Control Unit (ECU) Monitor O
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Typical Engine Control Unit (ECU) M
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Lack of Communication Codes:CAN Com
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Glow PlugsThe diesel engine uses gl
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Glow Plug Circuit Open Load Check O
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Glow Plug Circuit Resistance Out of
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Miscellaneous ECU Errors:VID Block
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Most vehicle applications no longer
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Transmission Fluid Temperature Sens
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Shift Solenoid Functional Check Ope
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Pressure Control Solenoid Check Ope
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Transmission OutputsShift Solenoids
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On Board Diagnostic ExecutiveThe On
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I/M Readiness CodeThe readiness fun
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OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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