OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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I/M Readiness CodeThe readiness function is implemented based on the J1979 format. Clearing codes using a scan tool results inthe various I/M readiness bits being set to a “not-ready” condition. As each non-continuous monitor completes afull diagnostic check, the I/M readiness bit associated with that monitor is set to a “ready” condition. This may takeone or two driving cycles based on whether malfunctions are detected or not.Power Take Off ModeWhile PTO mode is engaged, the I/M readiness bits are set to a “not-ready” condition. When PTO mode isdisengaged, the I/M readiness bits are restored to their previous states prior to PTO engagement. During PTOmode, only CCM circuit checks continue to be performed.Serial Data Link MIL IlluminationThe OBD-II diagnostic communication messages utilize an industry standard 500 kbps CAN communication link.The instrument cluster on some vehicles uses the same CAN data link to receive and display various types ofinformation from the PCM. For example, the engine coolant temperature information displayed on the instrumentcluster comes from the same ECT sensor used by the PCM for all its internal calculations.These same vehicles use the CAN data link to illuminate the MIL rather than a circuit, hard-wired to the PCM.The PCM periodically sends the instrument cluster a message that tells it to turn on the MIL, turn off the MIL orblink the MIL. If the instrument cluster fails to receive a message within a 5-second timeout period, the instrumentcluster itself illuminates the MIL. If communication is restored, the instrument cluster turns off the MIL after 5seconds. Due to its limited capabilities, the instrument cluster does not generate or store Diagnostic TroubleCodes.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 156 OF 157
Calculated Load ValueLOAD_PCT (PID $04) =Current Calculated TorqueMaximum Engine Torque at conditionsWhere:Current Calculation of torque is derived from the injected quantity of torque producing fuel and engine speed.Maximum Engine Torque is derived from the maximum curve.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 157 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
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Engine SensorsAir Temperature Ratio
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Ambient Air Temperature (AAT) Senso
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Charge Air Cooler Temperature (CACT
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EGR Cooler Downstream Temperature R
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Barometric Pressure and Manifold Ab
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Turbine Upstream Pressure Sensor Pl
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EGR Valve Position SensorAnalog inp
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Engine Coolant & Engine Oil Correla
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Engine Oil Temperature (EOT) Sensor
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Typical Camshaft and Crankshaft Sen
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Typical Fan and Fan Speed Sensor Ch
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MAF Rationality CheckA rationality
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Mass Air Flow Sensor Plausibility C
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Reductant Pressure Sensor Signal Ra
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DEF System Pressure ControlDEF pres
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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
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OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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