2015 MY OBD System Operation Summary for Diesel .Introduction – OBD-II and HD OBD Light Duty OBD-II

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FORD MOTOR COMPANY REVISION DATE: DECEMBER 22, 2014 09.01.00.02-PAGE 1 OF 186

2015 MY OBD System Operation

Summary for Diesel Engines Table of Contents

Introduction OBD-II and HD OBD ........................................................................................................................... 5

General Description 6.7L/3.2L Diesel Engines............................................................................................................ 6

System Schematic 3.2L Chassis Certified ................................................................................................ 7

System Schematic 6.7L Chassis Certified ................................................................................................ 8

System Schematic 6.7L Dynamometer Certified ...................................................................................... 9

2015 MY 3.2L I5 Diesel Exhaust Features, Medium Duty, Chassis Cert ............................................... 11

2015 MY 6.7L V8 Diesel Exhaust Features, Medium Duty, Chassis Cert.............................................. 12

2015 MY 6.7L V8 Diesel Exhaust Features, Medium Duty, Dyno Cert .................................................. 12

NON-METHANE HYDROCARBON (NMHC) CONVERTING CATALYST MONITOR ........................................ 13

Diesel Oxidation Catalyst Efficiency Monitor - Functional ...................................................................... 13

Diesel Oxidation Catalyst Efficiency Monitor Intrusive ........................................................................ 14

Diesel Oxidation Catalyst DPF Regeneration Assistance Monitor ......................................................... 15

Diesel Oxidation Catalyst SCR Assistance Monitor ............................................................................... 15

OXIDES OF NITROGREN (NOx) CONVERTING CATALYST MONITORING..................................................... 15

Selective Catalyst Reduction Catalyst Efficiency Monitor ...................................................................... 15

Selective Catalyst Reduction Feedback Control Monitors ..................................................................... 17

Exhaust Temperature Controller Monitor ............................................................................................... 18

Selective Catalyst Reduction Tank Level ............................................................................................... 19

MISFIRE MONITOR .................................................................................................................................................... 20

Misfire System Overview ........................................................................................................................ 20

Misfire Algorithm Processing .................................................................................................................. 20

FUEL SYSTEM MONITOR ........................................................................................................................................ 22

Fuel System Overview ............................................................................................................................ 22

Fuel Rail Pressure Sensor Circuit Check ............................................................................................... 22

Fuel Rail Pressure Sensor Range Check: .............................................................................................. 24

Injector Code Missing/Invalid: ................................................................................................................. 31

Fuel system pressure control: ................................................................................................................. 32

Fuel Rail Pressure Monitors: .................................................................................................................. 32

FORD MOTOR COMPANY REVISION DATE: DECEMBER 22, 2014 09.01.00.02-PAGE 2 OF 186

Injection Timing / Injection quantity ........................................................................................................ 34

Fuel Mass Observer (Global Fuel Bias): ................................................................................................ 36

Feedback control: ................................................................................................................................... 37

Zero Fuel Calibration: ............................................................................................................................. 37

EXHAUST GAS SENSOR MONITOR ...................................................................................................................... 41

Air-Fuel Ratio Sensors: Feedgas NOx Sensor Control Module ............................................................. 41

Air-Fuel Ratio Sensors: Tailpipe NOx and O2 Sensor Control Module .................................................. 48

Particulate Matter Sensor............................................................................................................................................ 55

Exhaust Gas Particulate Matter Sensor (PMS) ...................................................................................... 55

Particulate Matter Sensor Sampling Monitor .......................................................................................... 61

Particulate Matter Sensor Regeneration Monitor ................................................................................... 62

Particulate Matter Filter Monitor Using PM Sensor ................................................................................ 63

EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR ........................................................................... 65

EGR Rate System Monitor ..................................................................................................................... 65

EGR Cooler / EGR Cooler Bypass Monitor ............................................................................................ 68

EGR System Slow Response ................................................................................................................. 71

EGR Control Limits Monitor .................................................................................................................... 71

Mass Airflow Closed-loop Control Limits Monitor ................................................................................... 72

BOOST PRESSURE CONTROL SYSTEM MONITORING .................................................................................... 73

Intrusive Turbo Position and Response Monitoring ................................................................................ 73

Overboost Monitoring ............................................................................................................................. 75

Threshold Overboost Monitoring ............................................................................................................ 76

Underboost Monitoring ........................................................................................................................... 77

Charge Air Cooler Monitoring ................................................................................................................. 78

PARTICULATE MATTER (PM) FILTER MONITORING ......................................................................................... 80

DPF Filter Efficiency Monitor (3.2L only) ................................................................................................ 80

DPF Filter Missing Substrate Monitor ..................................................................................................... 81

DPF Frequent Regeneration Monitor ..................................................................................................... 82

DPF Incomplete Regeneration Monitor .................................................................................................. 83

DPF Feedback Control Monitors ............................................................................................................ 84

DPF Restriction Monitor .......................................................................................................................... 85

ENGINE COOLING SYSTEM MONITORING .......................................................................................................... 86

Thermostat Monitor ................................................................................................................................. 86

Primary Coolant Temp Rise Monitoring .................................................................................................. 87

Secondary Coolant Temp Rise Monitoring ............................................................................................. 88

COLD START EMISSION REDUCTION STRATEGY MONITORING................................................................... 89

Cold Start Emission Reduction System Monitor (Only 6.7L Pickup Applications) ................................. 89

Cold Start Emission Reduction Component Monitor .............................................................................. 90

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