2018 MY OBD SYSTEM OPERATION UMMARY FOR …

1 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 1 OF 210 2018 MY OBD SYSTEM OPERATION SUMMARY FOR DIESEL ENGINES Table of Contents Introduction OBD-II and HD OBD .. 6 General Description Diesel 7 SYSTEM Schematic Chassis Certified .. 8 SYSTEM Schematic Dynamometer Certified .. 9 SYSTEM Schematic Chassis Certified .. 12 NON-METHANE HYDROCARBON (NMHC) CONVERTING CATALYST MONITOR .. 15 Diesel Oxidation Catalyst Efficiency Monitor - Functional .. 15 Diesel Oxidation Catalyst Efficiency Monitor Intrusive .. 16 Diesel Oxidation Catalyst DPF Regeneration Assistance Monitor .. 17 Diesel Oxidation Catalyst SCR Assistance Monitor .. 17 OXIDES OF NITROGREN (NOx) CONVERTING CATALYST 18 Selective Catalyst Reduction Catalyst Efficiency Monitor.

2 18 Selective Catalyst Reduction SCR SYSTEM Fault .. 21 Selective Catalyst Reduction Feedback Control Monitors .. 22 Selective Catalyst Reduction Tank Level .. 23 MISFIRE MONITOR .. 24 Misfire SYSTEM Overview .. 24 Misfire Algorithm Processing .. 24 FUEL SYSTEM MONITOR .. 26 Fuel SYSTEM Overview .. 26 Fuel Rail Pressure Sensor Checks .. 26 Fuel Rail Pressure Controller Range Check: .. 28 Fuel Rail Temperature Sensor Checks .. 29 Fuel Volume Control Valve Checks .. 30 Fuel Pressure Control Valve Checks ( only) .. 31 Fuel Low Pressure Lift Pump Checks .. 32 Fuel Injector Checks .. 34 Fuel Injector Code Missing/Invalid: .. 36 Fuel Rail Pressure Monitors: .. 37 Injection Timing / Injection quantity.

3 39 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 2 OF 210 Fuel Mass Observer (Global Fuel Bias) .. 41 Feedback control: .. 42 Zero Fuel Calibration: .. 42 EXHAUST GAS SENSOR MONITOR .. 47 Air-Fuel Ratio Sensors: Feedgas NOx Sensor Control Module .. 47 Air-Fuel Ratio Sensors: Tailpipe NOx and O2 Sensor Control Module .. 59 Particulate Matter 73 Exhaust Gas Particulate Matter Sensor (PMS) .. 73 Particulate Matter Sensor Sampling Monitor .. 78 Particulate Matter Sensor Regeneration Monitor .. 79 Particulate Matter Filter Monitor Using PM Sensor .. 80 EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR .. 82 EGR Rate SYSTEM Monitor .. 82 EGR Cooler / EGR Cooler Bypass Monitor .. 85 EGR SYSTEM Slow Response.

4 89 EGR Control Limits Monitor .. 89 Mass Airflow Closed-loop Control Limits Monitor .. 90 BOOST PRESSURE CONTROL SYSTEM MONITORING .. 91 Intrusive Turbo Position and Response Monitoring .. 91 Overboost Monitoring .. 93 Threshold Overboost Monitoring .. 94 Underboost Monitoring .. 95 Charge Air Cooler Monitoring .. 97 PARTICULATE MATTER (PM) FILTER MONITORING .. 98 DPF Filter Missing Substrate Monitor .. 98 DPF Frequent Regeneration Monitor .. 99 DPF Incomplete Regeneration Monitor .. 100 DPF Feedback Control Monitors .. 101 DPF Restriction Monitor .. 102 ENGINE COOLING SYSTEM MONITORING .. 103 Thermostat Monitor .. 103 Primary Coolant Temp Rise Monitoring .. 104 Secondary Coolant Temp Rise Monitoring.

5 105 COLD START EMISSION REDUCTION STRATEGY 106 Cold Start Emission Reduction Component Monitor .. 106 Crankcase Ventilation Monitor .. 110 Engine Sensors .. 111 Air Temperature Rationality Test .. 111 Barometric Pressure and Manifold Absolute Pressure .. 118 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 3 OF 210 Turbine Upstream Pressure Sensor Plausibility Checks .. 120 Upstream Turbine Pressure Sensor Signal Range Check .. 121 EGR Valve Position Sensor .. 121 Throttle Position Sensor .. 122 EGR Downstream Temperature Sensor Dynamic Plausibility Check .. 122 Engine Coolant & Engine Oil Correlation .. 122 Cam and Crank Sensor: .. 126 Mass Air Meter .. 128 MAF Rationality Check.

6 129 Air Path Leakage Check .. 131 Turbocharger/Boost Sensor .. 133 DEF Control and Delivery Systems Diesel .. 134 DEF Pressure Sensor .. 134 Reductant Pressure Sensor Signal Range 135 Reductant Pressure Plausibility Check before Start-up .. 135 DEF Pressure Build-up Check at Start-up .. 136 DEF SYSTEM Pressure Control .. 137 Reductant Tank Level Sensor .. 139 Reductant Tank Level Sensor Circuit Checks .. 140 Reductant Tank Level Sensor Plausibility Check .. 140 Reductant Tank Temperature Sensor .. 141 Reductant Tank Temperature Plausibility Check .. 142 Reductant Control Module Supply Check .. 142 DEF Control and Delivery Systems Diesel .. 142 DEF SYSTEM Pressure Control .. 143 Reductant Pump Motor and Pump Motor Controller (PMC).

7 144 Reductant Pump Motor Circuit Checks .. 146 Reductant Pump Motor Functional Check .. 146 Reductant Dosing Valve (Injector) .. 148 Reductant Dosing Valve Circuit Checks .. 148 Plausibility Check for Pump Motor Duty Cycle (Clogging) .. 150 Reductant Dosing Valve Functional Check .. 151 Reductant Heaters .. 152 Reductant Heater Plausibility Checks .. 152 Additional plausibility check for heater circuit #2: .. 154 Reductant tank heater performance check (heater circuit #1): .. 155 Reductant Quality and Level Sensor .. 155 Exhaust Gas Temperature Sensor Rationality Test .. 158 Diesel Particulate Filter Pressure Sensor .. 161 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 4 OF 210 Diesel Particulate Filter Pressure Offset Test.

8 162 Diesel Particulate Filter Pressure Rationality Test .. 163 Driver Input Devices .. 164 Accelerator Pedal Diagnostics .. 164 Brake Switch Diagnostics .. 164 Engine Outputs .. 165 EGR Valve Actuator Signal Range Check .. 165 EGR Valve Offset Learn Limits .. 165 EGR Valve Actuator Jammed Detection .. 166 Throttle Valve Actuator Signal Range Check .. 166 Throttle Valve Offset Learn Limits .. 167 Throttle Valve Actuator Jammed Detection .. 167 ECB Valve Actuator Signal Range Check .. 168 Engine Over Speed Monitor .. 171 Lack of Communication .. 177 Glow Plugs and Glow Plug Control Modudule (GPCM) .. 179 Down Stream Injection (DSI) Sytem .. 183 DSI Vaporizer Pump Circuit Continuity Check Monitor.

9 183 DSI Vaporizer Glow Plug Circuit Continuity Check Monitor .. 184 DSI Vaporizer Glow Plug Relay Plausibility Check Monitor .. 185 DSI Leakage Monitor .. 186 Turbocharger Actuator Signal Range Check .. 187 Fan Control Checks .. 187 Miscellaneous ECU Errors: .. 188 ECU Temperature Sensor Checks .. 188 Vehicle Configuration 189 Transmission Park/Neutral Gear Check at 189 Comprehensive Component Monitor - Transmission .. 190 Transmission Inputs .. 190 Transmission Outputs .. 193 Transmission Control Module (TCM) .. 197 6R140 (RWD) Transmission with external PCM or TCM .. 198 On Board Diagnostic Executive .. 202 Exponentially Weighted Moving Average .. 203 Serial Data Link MIL Illumination.

10 204 Calculated Load Value .. 205 I/M Readiness .. 205 Power Take Off Mode .. 206 In-Use Monitor Performance Ratio .. 207 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 5 OF 210 Mode$06 Results .. 209 FORD MOTOR COMPANY REVISION DATE: NOVEMBER 23, 2015 6 OF 210 Introduction OBD-II and HD OBD OBD-II Systems On Board Diagnostics II - Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines certified under title 13, CCR section California OBD-II applies to all California and "CAA Sec. 177 States" for gasoline engine vehicles up to 14,000 lbs. Gross Vehicle Weight Rating (GVWR) starting in the 1996 MY and all diesel engine vehicles up to 14,000 lbs. GVWR starting in the 1997 MY.