2005 MY OBD System Operation Summary for Gasoline Engines

AIR Monitor Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0411 functional check,P0412 primary side circuit checkP2257, P2258 secondary side circuit checksFunctional - once per driving cycle, circuit checks - continuousOxygen sensor monitor complete and OKECT, IAT, no fuel system DTCs20 seconds at idleTypical AIR functional check entry conditions:Entry condition Minimum MaximumTime since engine start-upEngine Coolant Temperature600 seconds150 o FShort Term Fuel Trim not too lean 5.0%Fuel Tank Pressure4.5 in H 2 OClosed Throttle at idle rpm at idle rpmPurge Duty Cycle 20%Purge Fuel Flow 0 lb/min 0.2 lb/minBattery Voltage11 voltsNote: No P0411 DTC is stored if IAT < 20 o F at the start of the functional test although the test runs.(Precludes against identifying a temporary, frozen check valve.)Typical AIR functional check malfunction thresholds:Minimum time allowed for HO2S sensor to indicate lean: < 4 secondsJ1979 Secondary Air Mode $06 DataTest ID Comp ID Description for J1850 Units$30 $11 HO2S11 voltage for upstream flow test and rich limit volts$30 $21 HO2S21 voltage for upstream flow test and rich limit volts$31 $00 HO2S lean time for upstream flow test and time limit secondsMonitor ID Test ID Description for CAN Units$71 $80 HO2S11 voltage for upstream flow test and rich limit volts$71 $81 HO2S21 voltage for upstream flow test and rich limit volts$71 $82 HO2S lean time for upstream flow test and time limit secondsConversion for Test ID $30: multiply by 0.00098 to get voltsConversion for Test ID $31: multiply by 0.125 to get secondsFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 15 OF 131