OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

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Glow PlugsThe diesel engine uses glow plugs to assist with cold weather starting and combustion until the cylinder is warmenough to operate normally. The glow plugs are duty cycle controlled and will overheat if constant 12V is applied.The glow plugs are operated by the Glow Plug Control Module (GPCM). It contains 8 high current smart MOSFETdrivers, one for each glow plug. Glow time and intensity are calculated on the basis of CAN signals (rpm, torque,engine coolant temp, air temp and BP.) The module also contains 3 drivers for the DEF (NOx reductant) heatingand thawing system.GPCMThe GPCM is connected to the ECU via Diesel high speed CAN. All data and diagnostics pass over this nonpubliccommunication bus. The standard operating voltages for the GPCM are 6.5 volts to 16 volts. Limitedoperation between 5.5v and 6.5v on the lower range and no operation below 5.5v. Glow function is disabled below6.5v and above 16.5v.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 136 OF 157
Glow Plug Module Operational Checks:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationU0106 – Lost Communication with GPCMP0381 – Glow Plug/Heater Indicator CircuitP064C – Glow Plug Control ModuleP06DF – Glow Plug Module Memory Checksum ErrorP138B – Glow Plug Module System VoltageP20C2 – Reductant Heater "C" Control PerformanceP06DF, P0381 at power up, otherwise continuousnonenone~1 second to register a malfunctionGlow Plug Module: Malfunction Thresholds:Communication lost for > 5 secondsCluster detects wait to start lamp in wrong state (off when commanded on)Any internal driver circuits detect fault (not switching or over temp) > 1 sec (glow plugs, urea heaters or relay)RAM checksums do not match expectedGPCM main power feed voltage too low / too high / open circuit (< 6.5 volts or > 16 volts)Low voltage detected on the Reductant Heater Circuit "C" < 5 voltsFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 137 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
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 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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