OBD Operation Summary for Fiesta - MotorCraftService.com
OBD Operation Summary for Fiesta - MotorCraftService.com
OBD Operation Summary for Fiesta - MotorCraftService.com
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Fuel Monitor <strong>Operation</strong>:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0171 System LeanP0172 System Richcontinuous while in closed loop fuelNACPS, ECT, MAF, Misfire, IAT, TPS, HO2S, CAM, TPS, CRK,Injectors , AMP, AAT, VVTcontinuousTypical fuel monitor entry conditions:Entry condition Minimum MaximumEngine running and lambda closed loopBAROMass Air Flow75 kPa65 mg/stkEngine Speed 608 rpm redlineEngine Coolant TemperatureIntake Air TemperatureAmbient Air Temperature69.75 o C-10.5 o C-10.5 o CEngine speed <strong>for</strong> offset lambda adaptation 608 rpm 1206 rpmFuel mass <strong>for</strong> offset lambda adaptation14.01 mg/strokeEngine speed <strong>for</strong> multiplicative lambda adaptation 1408 rpm 4192 rpmFuel mass <strong>for</strong> multiplicative lambda adaptation 5.34 mg/stroke 25.01 mg/strokeTypical fuel monitor malfunction thresholds:P0171Lambda controller at maximum limit, short term fuel trim > 39.99% <strong>for</strong> > 40 sec ORLambda adaptation > 25% <strong>for</strong> > 20 secP0172Lambda controller at minimum limit, short term fuel trim < -39.99% <strong>for</strong> > 60 sec ORLambda adaptation < - 25% <strong>for</strong> 20 secCONTINENTAL REVISED: SEPTEMBER 17, 2010 PAGE 35 OF 111
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