OBD Operation Summary for 6.7L Diesel - MotorCraftService.com
OBD Operation Summary for 6.7L Diesel - MotorCraftService.com OBD Operation Summary for 6.7L Diesel - MotorCraftService.com
Primary Coolant Temp Dynamic MonitoringTo ensure the primary ECT sensor has not stuck below normal operating range, a simple dynamic check to verifya minimum rise in coolant temperature over a calibratable time has been implemented. If coolant temperature atstart is greater than -35 deg C and less than 54 deg C, the monitor is enabled. At -35 deg C, the coolant isexpected to rise up to -7 deg C in 291 seconds or less. If -7 deg C coolant temp. is not achieved in the required291 second timeframe, a fault is detected. At a -7 deg C start temp, the coolant is expected to rise to 57 deg C in4526 seconds- assuming worst case with EGR off, vehicle idling in neutral with heater on. Again, if the minimumtemperature is not achieved in the required time, a fault is detected. This diagnostic is used in conjunction with theoil vs. coolant plausibility check, thermostat model, and SRC checks to verify proper ECT operation and enginewarm-up.ECT Dynamic Monitor:DTCsMonitor ExecutionMonitor SequenceSensors OKTypical Monitoring DurationP0116 - Engine Coolant Temperature Sensor 1 Circuit Range/PerformanceOnce per tripNoneECT291 seconds at -35 deg C start temp. idle only4526 seconds at -7 deg C start temp, idle onlyTypical ECT Dynamic Monitor Entry Conditions:Entry condition Minimum MaximumEngine coolant temperature -35 deg C 54 deg CEngine speed400 rpmTypical ECT Dynamic Monitor Malfunction Thresholds:291 seconds at -35 deg C start temp to rise to -7 deg C4526 seconds at -7 deg C start temp to rise to 57 deg CFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 68 OF 157
Secondary Coolant Temp Dynamic MonitoringThe 6.7L engine has a secondary coolant loop with two thermostats, a 20C thermostat for the charge air coolerand fuel cooler, and a 45C thermostat for the EGR cooler and trans cooler. System schematic below:The dynamic check to detect a stuck ECT2 sensor is identical in function to the dynamic check used for theprimary coolant loop. A minimum rise is expected over a calibratable amount of time,ECT2 Dynamic Monitor:DTCsMonitor ExecutionMonitor SequenceSensors OKTypical Monitoring DurationP2183 - Engine Coolant Temperature Sensor 2 Circuit Range/PerformanceOnce per tripNoneECT2,5750 sec at -35C, 200 at 25CTypical ECT2 Dynamic Monitor Entry Conditions:Entry condition Minimum MaximumECT2 -35 deg C 45 deg CEngine Speed400 rpmTypical ECT2 Dynamic Monitor Malfunction Thresholds:within the time duration, must reach 25CFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 69 OF 157
- 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 64 and 65: Mass Air Flow Sensor Functional Che
- Page 66 and 67: Warm-up profiles with nominal therm
- 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
Secondary Coolant Temp Dynamic MonitoringThe <strong>6.7L</strong> engine has a secondary coolant loop with two thermostats, a 20C thermostat <strong>for</strong> the charge air coolerand fuel cooler, and a 45C thermostat <strong>for</strong> the EGR cooler and trans cooler. System schematic below:The dynamic check to detect a stuck ECT2 sensor is identical in function to the dynamic check used <strong>for</strong> theprimary coolant loop. A minimum rise is expected over a calibratable amount of time,ECT2 Dynamic Monitor:DTCsMonitor ExecutionMonitor SequenceSensors OKTypical Monitoring DurationP2183 - Engine Coolant Temperature Sensor 2 Circuit Range/Per<strong>for</strong>manceOnce per tripNoneECT2,5750 sec at -35C, 200 at 25CTypical ECT2 Dynamic Monitor Entry Conditions:Entry condition Minimum MaximumECT2 -35 deg C 45 deg CEngine Speed400 rpmTypical ECT2 Dynamic Monitor Malfunction Thresholds:within the time duration, must reach 25CFORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 69 OF 157