OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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EXHAUST GAS SENSOR MONITORAir-Fuel Ratio Sensors: Tailpipe NOx and O2 Sensor Control ModuleThe NOx sensor control module is mounted to the vehicle frame under the body. It is used to control thecombination tailpipe NOx and O2 sensor mounted in the diesel aftertreatment exhaust system downstream of theSCR and DPF. It communicates to the ECM via CAN to report NOx and O2 concentrations as well assensor/controller errors.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 38 OF 157
The control module consists of a microprocessor, RAM, ROM, EEPROM, Ip1 circuit, Ip2 circuit, Rpvs circuit,heater driver, and temperature sensor. The EEPROM stores sensor and controller module calibration coefficientsobtained during the manufacturing process. The Ip1 circuit consists of an ASIC (like that of a UEGO ASIC) thatadjusts pumping current in the sensing element’s Ip1 circuit for O2 detection. The Ip2 circuit adjusts the pumpingcurrent in the sensing element’s Ip2 circuit for NOx detection. The Ip2 circuit consists of 2 bands: a wide range anda narrow range. The Rpvs circuit is a measurement of the resistance of the Vs cell of the sensor element. Thismeasurement is used to estimate the temperature of the sensing element. The heater driver supplies a PWMvoltage to the heater portion of the sensing element to maintain the element’s target operational temperature. PIDfeedback from Rpvs is used to control and maintain the element temperature. The microprocessor processes all ofthe inputs from the sensing element and outputs to the CAN circuit. The temperature sensor in the controllermodule is used for compensating the temperature dependency of circuit components and for OBD rationalitychecks.The NOx controller module interfaces with the vehicle via a power, signal ground, power ground, and CAN. Thecompensated O2 concentration, compensated NOx concentration, Rpvs, pressure compensation factors,sensor/module OBD (including monitor completion flags), module temperature, software ID, CALID, and CVN arecommunicated via CAN to the vehicle PCM.NOx Controller Module MalfunctionsDTCs P06EA NOx Sensor Processor Performance (Bank 1 Sensor 1)Monitor executionMonitor SequenceSensors OKMonitoring DurationU05A1 NOx Sensor "A" Received Invalid Data From ECM/PCMP225A NOx Sensor Calibration Memory (Bank 1 Sensor 1)continuousIp2-N and Ip2-W range rationality – 50ppm < [NOx] < 100ppmnot applicable5 seconds to register a malfunctionTypical NOx Controller Malfunction ThresholdsP06EA RAM failure, ROM CRC check error or EEPROM CRC check errorIp1 out of range – Ip1(VIP2.1) < 1.8V, Ip1(VIP2.1) > 2.2 V, Ip1(VIP2.2) < 0.2 V, or Ip1(VIP2.2) > 0.6VIp2-W out of range – Vs+ ≥ 5.35V and Ip2-W > 4.8 VIp2-N out of range – Vs+ ≥ 5.35V and Ip2-N < 0.2 VIp2-N and Ip2-W range rationality – Integral value of differential between Ip2-N & Ip2-W ≥ 250 ppmVp2 circuit failure – Vp2 < 250mV or Vp2 > 650mVRpvs short to ground – Rpvs < 0.2VTemperature sensor short to battery > 4.5 VTemperature sensor short to ground < 0.45 VTemperature sensor open, between 0.45 V and < 0.48 VU05A1 Erroneous Signal (Dew point reached with ignition off, etc.)Timeout (>1 second before message received)P225A Calibration memory does not pass CRC checkFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 39 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 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 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
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
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
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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