OBD Operation Summary for Fiesta - MotorCraftService.com

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Thermostat MonitoringSTARTContinuous calculation ofCoolant TemperatureModel TCO_SUBMonitoring conditions atstartYesNoECT-sensor signal> threshold 1NoNoTCO_SUBmodel value> threshold 1YesYesDiagnosis disabled <strong>for</strong> thisDCNoMonitoringconditions at end ofmonitoringYesECT-sensor signal> threshold 2YesThermostat OKNoThermostat faultyFault ProcessingCONTINENTAL REVISED: SEPTEMBER 17, 2010 PAGE 60 OF 111
ECT Below Thermostat Regulating TemperatureDTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0128Once per driving cycleNoneECT, MAF, VS, CKP, TPS, IAT127 seconds, based on Inlet Air temperatureTypical ECT Below Thermostat Regulating Temperature check entry conditions:Entry Condition Minimum MaximumPercentage of Time at Vehicle speed > than 20 mph 55 %Percentage of time at MAF > 18 … 20 kg/h 36%Percentage of time in DFCO 10%Percentage of Time at Vehicle speed > than 47 mph 36%Difference between IAT and ECT -20.25 °CTypical ECT Below Thermostat Regulating Temperature check malfunction thresholds:Measure ECT > 69.75 °C after modeled ECT exceeds 81.75 °CCONTINENTAL REVISED: SEPTEMBER 17, 2010 PAGE 61 OF 111
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2011 MY OBD System OperationSummary
Page 3 and 4:
Knock Sensor.......................
Page 5 and 6:
In the example above, CATMN_IAF_SUM
Page 7 and 8:
Typical IAF catalyst monitor entry
Page 9 and 10: Fault processing - Emission Thresho
Page 11 and 12: Misfire Determination ProcessingCON
Page 13 and 14: J1979 Misfire Mode $06 DataMonitor
Page 15 and 16: .020" Leak Switch OpenTypical vehic
Page 17 and 18: CONTINENTAL REVISED: SEPTEMBER 17,
Page 19 and 20: NVLD II Module OperationNVLD II mod
Page 21 and 22: Canister Purge Solenoid, switch and
Page 23 and 24: Canister Purge valve Functional che
Page 25 and 26: High Purge Flow Monitor Operation:D
Page 27 and 28: EVAP Pressure Switch Performance Mo
Page 29 and 30: NVLD II Communication Check Operati
Page 31 and 32: O2 sensor voltageSHRTFT, Short Term
Page 33 and 34: Fuel Monitor Adaption MonitoringErr
Page 35 and 36: Fuel Monitor Operation:DTCsMonitor
Page 37 and 38: Upstream HO2S Circuit CheckNoStartM
Page 39 and 40: HO2S11 circuit check operation:DTCs
Page 41 and 42: Upstream HO2S Slow Response CheckCO
Page 43 and 44: Up-Stream Oxygen Sensor Rationality
Page 45 and 46: Upstream Oxygen Sensor Heater Circu
Page 47 and 48: HO2S Heater Monitor Operation:DTCs
Page 49 and 50: HO2S12 circuit check operation:DTCs
Page 51 and 52: Downstream Oxygen Sensor Slow Respo
Page 53 and 54: Downstream HO2S12 Response Rate Ope
Page 55 and 56: Downstream HO2S12 Functional Check
Page 57 and 58: Downstream HO2S Heater Electrical C
Page 59: Thermostat MonitorThe coolant therm
Page 63 and 64: Spark Timing MonitorWhen the CSER s
Page 65 and 66: Cold Start Emission Reduction Syste
Page 67 and 68: CSER Monitor OperationDTCMonitor Ex
Page 69 and 70: Variable Camshaft Timing Target Err
Page 71 and 72: Variable Cam Timing Slow ResponseSt
Page 73 and 74: Typical VVT Target Error/Slow Respo
Page 75 and 76: Camshaft/Crankshaft Position Correl
Page 77 and 78: Electronic Throttle ControlThe Elec
Page 79 and 80: Electronic Throttle Control (ETC) M
Page 81 and 82: Electronic Throttle Control (ETC) M
Page 83 and 84: Accelerator and Throttle Position S
Page 85 and 86: ECT Sensor Rationality Check Operat
Page 87 and 88: IAT Rationality TestThe IAT rationa
Page 89 and 90: Ambient Air Temperature Sensor Inpu
Page 91 and 92: Mass Air Flow Range PerformanceTTPS
Page 93 and 94: 5 Volt Sensor Reference Voltage A C
Page 95 and 96: Idle Speed Control MonitorThe Idle
Page 97 and 98: Knock SensorTwo basic diagnostic te
Page 99 and 100: Ignition CoilThe purpose of this di
Page 101 and 102: Crankshaft Position Sensor MonitorA
Page 103 and 104: Each clutch system consists of:•
Page 105 and 106: 3. Shift drum A motor - controls th
Page 107 and 108: The diagnostic executive controls t
Page 109 and 110: EWMA ExamplesEWMA with FIR and SCL
Page 111:
Closed Loop Fuel Control Enable Con
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OBD Operation Summary for Fiesta - MotorCraftService.com

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