2005 MY OBD System Operation Summary for Gasoline Engines

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;#11!%;11!)The purpose of the TPPC is to control the throttle position to the desired throttle angle. It is a separate chipembedded in the PCM. The desired angle is communicated from the main CPU via a 312.5 Hz duty cycle signal.The TPPC interprets the duty cycle signal as follows:0%
!#6! Analog inputs such as Intake Air Temperature (P0112, P0113), Engine Coolant Temperature (P0117, P0118),Cylinder Head Temperature (P1289. P1290), Mass Air Flow (P0102, P0103) and Throttle Position (P0122, P0123,P1120), Fuel Temperature (P0182, P0183), Engine Oil Temperature (P0197, P0198), Fuel Rail Pressure (p0192,P0193) are checked for opens, shorts, or rationality by monitoring the analog -to-digital (A/D) input voltage.Engine Coolant Temperature Sensor Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0117 (low input), P0118 (high input)continuousNonenot applicable5 seconds to register a malfunctionTypical ECT sensor check malfunction thresholds:Voltage < 0.244 volts or voltage > 4.96 voltsThe ECT rationality test checks to make sure that ECT is not stuck in a range that causes other OBD to bedisabled. If after a long (6 hour) soak, ECT is very high (> 230 o F) and is also much higher than IAT at start, it isassumed that ECT is stuck high. If after a long (6 hour) soak, ECT is stuck midrange between 175 o F (typicalthermostat monitor threshold temperature) and 230 o F and is also much higher than IAT at start, it is assumed thatECT is stuck mid range.ECT Sensor Rationality Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0116 (ECT stuck high or midrange)Once per driving cycleNoneECT, CHT, IAT100 seconds to register a malfunctionTypical ECT Sensor Rationality check entry conditions:Entry Condition Minimum MaximumEngine-off time (soak time)360 minDifference between ECT and IAT50 degEngine Coolant Temperature for stuck high condition 230 o FEngine Coolant Temperature for stuck midrange condition 175 o F 230 o FTypical ECT Sensor Rationality check malfunction thresholds:ECT stuck high for > 100 seconds and Catalyst, Misfire, Fuel System or HO2S Monitors have not run thisdrive cycle for stuck high condition OR ECT stuck midrange for > 100 secondsFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 75 OF 131
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Table of ContentsIntroduction - OBD
Page 4 and 5:
!The Catalyst Efficiency Monitor us
Page 6 and 7:
TYPICAL INDEX RATIO CATALYST MONITO
Page 8 and 9:
There are three different misfire m
Page 10 and 11:
0#1The acceleration that a piston u
Page 12 and 13:
J1979 Misfire Mode $06 DataTest ID
Page 14 and 15:
0$Secondary air systems typically u
Page 16 and 17:
201 34536/#/Vehicles that meet enha
Page 18 and 19:
0.040” EVAP Monitor Operation:DTC
Page 20 and 21:
201 3536/#/Some vehicles that meet
Page 22 and 23:
slosh. If the monitor aborts, it wi
Page 24 and 25: 0.020” EVAP Monitor Operation:DTC
Page 26 and 27: Test ID Comp ID Description for J18
Page 28 and 29: Ford's EONV implementation for Cali
Page 30 and 31: 1#4;!In this phase, the EONV test i
Page 32 and 33: 0.020” EONV EVAP Monitor Operatio
Page 34 and 35: 201!!#/Additional malfunctions that
Page 36 and 37: Fuel Tank Pressures Sensor Offset C
Page 38 and 39: :As fuel system components age or o
Page 40 and 41: -:-The time between HO2S switches i
Page 42 and 43: $-A functional test of the rear HO2
Page 44 and 45: -- 3 amps, (NTK)< 0.400 amps or > 3
Page 46 and 47: 1:$The Delta Pressure Feedback EGR
Page 48 and 49: If an EGR system malfunction is det
Page 50 and 51: After the vehicle has warmed up and
Page 52 and 53: 1:$In the 2002.5 MY, Ford introduce
Page 54 and 55: The ESM may provide the PCM with a
Page 56 and 57: Next, the differential pressure ind
Page 58 and 59: I/M Readiness IndicationIf the infe
Page 60 and 61: The Stepper Motor EGR Monitor consi
Page 62 and 63: Note: BARO is inferred at engine st
Page 64 and 65: $. 6The Electric Stepper Motor EGR
Page 66 and 67: The MAP sensor is also checked for
Page 68 and 69: When the entry conditions for the f
Page 70 and 71: 1!2Ford plans to comply with the PC
Page 72 and 73: ETC System Failure Mode and Effects
Page 76 and 77: Currently, vehicles use either an E
Page 78 and 79: Fuel Rail Pressure Sensor Check Ope
Page 80 and 81: Loss of Keep Alive Memory (KAM) pow
Page 82 and 83: CKP Ignition System Check Operation
Page 84 and 85: The Idle Air Control (IAC) solenoid
Page 86 and 87: There are several different styles
Page 88 and 89: The PCM continually calculates a ca
Page 90 and 91: Most vehicle applications no longer
Page 92 and 93: Intermediate Shaft Speed Sensor Fun
Page 94 and 95: Primary Pulley Speed Sensor Functio
Page 96 and 97: Secondary Pulley Pressure Sensor Ch
Page 98 and 99: Typical Shift Solenoid mechanical f
Page 100 and 101: Shift Completion Check Operation:DT
Page 102 and 103: Pressure Control Solenoid Check Ope
Page 104 and 105: Forward Clutch/Reverse Clutch Solen
Page 106 and 107: 4$=%$> );4R70E is the replacement f
Page 108 and 109: ! 4%:> );;The Analog Transmission R
Page 110 and 111: $%$> );;The Digital Transmission Ra
Page 112 and 113: Direct One Way ClutchThe Direct One
Page 114 and 115: Direct One Way ClutchThe Direct One
Page 116 and 117: $&&> %$> );;Transmission Range Sens
Page 118 and 119: 4:=%:.)%:> );;The Transmission Rang
Page 120 and 121: CFT 30 Mechatronic Illustration;Tra
Page 122 and 123: Internal TCM Power SupplyIf the pow
Page 124 and 125:
shift, rpm does not go up during a
Page 126 and 127:
The shift solenoids are monitored f
Page 128 and 129:
*> #606Exponentially Weighted Movin
Page 130 and 131:
@$!The readiness function is implem
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2005 MY OBD System Operation Summary for Gasoline Engines

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