OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

Intrusive Wastegate MonitoringThe intrusive wastegate monitor operates on the same principles and has the same entry conditions as theintrusive VGT monitor. It runs once the VGT monitor completes, using the same commanded VGT position (85%)and EGR valve position (10%). The wastegate is commanded to 5% open for 2 seconds, then 95% open for 2seconds. The minimum and maximum MAP values are saved and compared to a threshold. If the desiredseparation in MAP pressure isn’t achieved, a fault is detected.Wastegate Monitor:DTCsMonitor ExecutionMonitor SequenceSensors OKTypical Monitoring DurationP1249- Wastegate Control Valve PerformanceOnce per driving cycleVGT, then wastegateECT, MAP, VS4 seconds for full wastegate monitoring cycle if pressure abort threshold hasn’tbeen reachedTypical Wastegate Monitor Entry Conditions:Entry Condition Minimum MaximumEngine speed for learning 500 rpm 760 rpmPedal position allowed for learning 0.5 %Engine oil temperature for learning 158 deg C 225 deg CFuel quantity allowed for learning20 mg/stokeVehicle speed for learning 3 mph 6-10 mphLoop counts after brake cycle800 countsBarometric Pressure 67 kPa 1020 kPaTypical Wastegate Monitor Malfunction Thresholds:Response from 5% wastegate position to 95% wastegate position in 2 seconds results in a change in manifoldpressure of 2.0 kPa or greater at sea level or 1.25 kPa at 8000 feet.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 53 OF 157