2002 MY OBD-II System Operation Summary - MotorCraftService.com

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TYPICAL INDEX RATIO CATALYST MONITOR ENTRY CONDITIONS:Entry condition Minimum MaximumTime since engine start-up (70 o F start)330 secondsEngine Coolant Temp 170 o F 230 o FIntake Air Temp 20 o F 180 o FTime since entering closed loop fuelInferred Rear HO2S sensor Temperature30 sec900 o FEGR flow (Note: an EGR fault disables EGR) 1% 12%Throttle Position Part Throttle Part ThrottleRate of Change of Throttle Position 0.2 volts /0.050 secVehicle Speed 5 mph 70 mphFuel Level 15%First Air Mass Cell 1.0 lb/min 2.0 lb/minEngine RPM for first air mass cell 1,000 rpm 1,300 rpmEngine Load for first air mass cell 15% 35%Monitored catalyst mid-bed temp. (inferred) for first air mass cell 850 o F 1,200 o FNumber of front O2 switches required for first air mass cell 50Second Air Mass Cell 2.0 lb/min 3.0 lb/minEngine RPM for second air mass cell 1,200 rpm 1,500 rpmEngine Load for second air mass cell 20% 35%Monitored catalyst mid-bed temp. (inferred) for second air mass cell 900 o F 1,250 o FNumber of front O2 switches required for second air mass cell 70Third Air Mass Cell 3.0 lb/min 4.0 lb/minEngine RPM for third air mass cell 1,300 rpm 1,600 rpmEngine Load for third air mass cell 20% 40%Monitored catalyst mid-bed temp. (inferred) for third air mass cell 950 o F 1,300 o FNumber of front O2 switches required for third air mass cell 30(Note: Engine rpm and load values for each air mass cell can vary as a function of the power-to-weight ratioof the engine, transmission and axle gearing and tire size.)TYPICAL MALFUNCTION THRESHOLDS:Rear-to-front O2 sensor switch/index-ratio > 0.75 (bank monitor)Rear-to-front O2 sensor switch/index-ratio > 0.60 (Y-pipe monitor)Rear-to-front O2 sensor switch/index ratio > 0.50 for E10 to > 0.90 for E85 (flex fuel vehicles)FORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 6 OF 66
J1979 MODE $06 DATATest ID Comp ID Description Units$10 $11 Bank 1 switch-ratio and max. limit unitless$10 $21 Bank 2 switch-ratio and max. limit unitless$10 $10 Bank 1 index-ratio and max. limit unitless$10 $20 Bank 2 index-ratio and max. limit unitlessConversion for Test ID $10: multiply by 0.0156 to get a value from 0 to 1.0** NOTE: In this document, a monitor or sensor is considered OK if there are no DTCs stored for that <strong>com</strong>ponentor system at the time the monitor is running.FORD MOTOR COMPANY REVISION DATE: OCTOBER 02, 2001 PAGE 7 OF 66
Page 2: 4R70W (RWD) Transmission ..........
Page 8 and 9: Misfire MonitorThere are two differ
Page 10 and 11: Misfire Monitor Operation:DTCsMonit
Page 12 and 13: AIR System MonitorThe secondary air
Page 14 and 15: leed-up criteria is exceeded on thr
Page 16 and 17: EVAP System Monitor - 0.020” dia.
Page 18 and 19: Ford’s 0.020” evaporative syste
Page 20 and 21: Typical 0.020” EVAP abort (fuel s
Page 22 and 23: Additional malfunctions that are be
Page 24: HO2S MonitorFront HO2S SignalThe ti
Page 27 and 28: HO2S Heaters, front and rearThe HO2
Page 29 and 30: In the 2002 MY, Ford will introduce
Page 31 and 32: After the vehicle is started, durin
Page 33 and 34: Finally, the differential pressure
Page 35 and 36: EGR flow is monitored using an anal
Page 37 and 38: Typical EGR flow check entry condit
Page 39 and 40: Comprehensive Component Monitor - E
Page 41 and 42: Ignition System Check Operation:DTC
Page 43 and 44: The Intake Manifold Runner Control
Page 45 and 46: Most vehicle applications no longer
Page 47 and 48: Transmission Fluid Temperature Sens
Page 49 and 50: Torque Converter Clutch Check Opera
Page 51 and 52: 4R70W (RWD) Transmission(no turbine
Page 53 and 54: CD4E (FWD) Transmission(has turbine
Page 55 and 56: 5R55E (RWD) Transmission(has turbin
Page 57 and 58:
Direct One Way ClutchThe Direct One
Page 59 and 60:
Direct One Way ClutchThe Direct One
Page 61 and 62:
4F27E (FN) (FWD) Transmission(has t
Page 63 and 64:
Exponentially Weighted Moving Avera
Page 65 and 66:
I/M Readiness CodeThe readiness fun
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