2005 MY OBD System Operation Summary for Gasoline Engines
2005 MY OBD System Operation Summary for Gasoline Engines 2005 MY OBD System Operation Summary for Gasoline Engines
$. 6The Electric Stepper Motor EGR System uses an electric stepper motor to directly actuate an EGR valve ratherthan using engine vacuum and a diaphragm on the EGR valve. The EGR valve is controlled by commandingfrom 0 to 52 discreet increments or “steps” to get the EGR valve from a fully closed to fully open position. Theposition of the EGR valve determines the EGR flow. Control of the EGR valve is achieved by a non-feedback,open loop control strategy. Because there is no EGR valve position feedback, monitoring for proper EGR flowrequires the addition of a MAP sensor.Stepper Motor EGR SystemPCMFRESH AIR INLETStepper MotorEGR Valve04030400Note: Some configurations may differ slightlyMapSensorIntake ManifoldExhaustGatesFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 64 OF 131
The Non-Intrusive Stepper Motor EGR Monitor consists of an electrical and functional test that checks thestepper motor and the EGR system for proper flow.The stepper motor electrical test is a continuous check of the four electric stepper motor coils and circuits to thePCM. A malfunction is indicated if an open circuit, short to power, or short to ground has occurred in one or moreof the stepper motor coils for a calibrated period of time. If a malfunction has been detected, the EGR system willbe disabled, and additional monitoring will be suspended for the remainder of the driving cycle, until the nextengine start-up.EGR Stepper Monitor Electrical Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0403continuousnone4 seconds to register a malfunctionStepper motor electrical check entry conditions:Battery voltage > 11.0 voltsTypical EGR electrical check malfunction thresholds:“Smart” Coil Output Driver status indicates open or short to ground, or short to powerEGR flow is monitored using an analog Manifold Absolute Pressure Sensor (MAP). If a malfunction has beendetected in the MAP sensor, the EGR monitor will not perform the EGR flow test.The MAP sensor is checked for opens, shorts, or out-of-range values by monitoring the analog-to-digital (A/D)input voltage.MAP Sensor Check OperationDTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0107 (low voltage), P0108 (high voltage)continuousnonenot applicable5 seconds to register a malfunctionMAP electrical check entry conditions:Battery voltage > 11.0 voltsTypical MAP sensor check malfunction thresholds:Voltage < 0.024 volts or voltage > 4.96 voltsFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 65 OF 131
- 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:$In the 2002.5 MY, Ford introduce
- Page 54 and 55: The ESM may provide the PCM with a
- Page 56 and 57: Next, the differential pressure ind
- Page 58 and 59: I/M Readiness IndicationIf the infe
- Page 60 and 61: The Stepper Motor EGR Monitor consi
- Page 62 and 63: Note: BARO is inferred at engine st
- Page 66 and 67: The MAP sensor is also checked for
- Page 68 and 69: When the entry conditions for the f
- Page 70 and 71: 1!2Ford plans to comply with the PC
- Page 72 and 73: ETC System Failure Mode and Effects
- Page 74 and 75: ;#11!%;11!)The purpose of the TPPC
- Page 76 and 77: Currently, vehicles use either an E
- Page 78 and 79: Fuel Rail Pressure Sensor Check Ope
- Page 80 and 81: Loss of Keep Alive Memory (KAM) pow
- Page 82 and 83: CKP Ignition System Check Operation
- Page 84 and 85: The Idle Air Control (IAC) solenoid
- Page 86 and 87: There are several different styles
- Page 88 and 89: The PCM continually calculates a ca
- Page 90 and 91: Most vehicle applications no longer
- Page 92 and 93: Intermediate Shaft Speed Sensor Fun
- Page 94 and 95: Primary Pulley Speed Sensor Functio
- Page 96 and 97: Secondary Pulley Pressure Sensor Ch
- Page 98 and 99: Typical Shift Solenoid mechanical f
- Page 100 and 101: Shift Completion Check Operation:DT
- Page 102 and 103: Pressure Control Solenoid Check Ope
- Page 104 and 105: Forward Clutch/Reverse Clutch Solen
- Page 106 and 107: 4$=%$> );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
$. 6The Electric Stepper Motor EGR <strong>System</strong> uses an electric stepper motor to directly actuate an EGR valve ratherthan using engine vacuum and a diaphragm on the EGR valve. The EGR valve is controlled by commandingfrom 0 to 52 discreet increments or “steps” to get the EGR valve from a fully closed to fully open position. Theposition of the EGR valve determines the EGR flow. Control of the EGR valve is achieved by a non-feedback,open loop control strategy. Because there is no EGR valve position feedback, monitoring <strong>for</strong> proper EGR flowrequires the addition of a MAP sensor.Stepper Motor EGR <strong>System</strong>PCMFRESH AIR INLETStepper MotorEGR Valve04030400Note: Some configurations may differ slightlyMapSensorIntake ManifoldExhaustGatesFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 64 OF 131
Change language