7.3L Diagnostics and Troubleshooting

• Introduction

• Section 1 - Description and Operation



• Section 2 - Diagnostic Methods

  • Diagnostic Methods

  • Diagnostic Tools and Required Equipment

  • Scan Tool Hookup

  • Quick Test Description

  • Quick Test Operation

  • Key On Engine Off (KOEO) On-Demand Self Test

  • Key On Engine Running (KOER) On-Demand Self Test

  • Retrieve and Clear Continuous DTCs

  • KOEO Injector Electrical Self Test

  • KOEO Output State Self Test

  • KOER Switch Self Test

  • KOER Cylinder Contribution Self Test

  • KOER Glow Plug Monitoring Self Test

  • Parameter Identification (PID)

  • Accumulating PCM Data

  • Analyzing PCM Data

  • On-Board System Readiness Test

  • Freeze Frame Data

  • Powertrain Control Module (PCM) Reset

  • Drive Cycles

  • Intermittent Diagnostic Techniques




• Section 3 - Symptom Charts

  • Symptom Chart Index

  • Chart 1 - Symptom Chart 1

  • Chart 2 - Symptom Chart 2

  • Chart 3 - Symptom Chart 3

  • Chart 4 - Symptom Chart 4

  • Chart 5 - Symptom Chart 5

  • Chart 6 - Symptom Chart 6

  • Chart 7 - Symptom Chart 7

  • Chart 8 - Symptom Chart 8

  • Chart 9 - Symptom Chart 9

  • Chart 10 - Symptom Chart 10

  • Chart 11 - Symptom Chart 11

  • Chart 12 - Symptom Chart 12

  • Chart 13 - Symptom Chart 13

  • Chart 15 - Symptom Chart 15

  • Chart 16 - Symptom Chart 16

  • Chart 17 - Symptom Chart 17




• Section 4 - Diagnostic Subroutines

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description




• Section 5 - Pinpoint Tests

  • Sensor and Actuator Diagnostic Procedures

  • General Procedures for Pinpoint Testing

  • Test A - Vehicle Battery

  • Test AA - Idle Validation Switch (IVS)

  • Test AB - Injector Driver Circuit Operation

  • Test AC - Barometric Pressure (BARO) Sensor

  • Test AD - 4x4 Low

  • Test AE - Air Conditioning

  • Test AF - Unable to Activate Self Test, SCP Error, DTC Not Listed

  • Test AG - PCM-ROM Failure

  • Test AH - Continuous Memory Failure

  • Test AJ - PCM Inactive Background Fault

  • Test AL - Tachometer

  • Test AM - Output Circuit Check (OCC) High

  • Test AN - Output Circuit Check (OCC) Low

  • Test AP - OBD II Readiness Code

  • Test B - Reference Voltage

  • Test C - Intake Air Temperature (IAT) Sensor

  • Test D - Manifold Absolute Pressure (MAP) Sensor

  • Test E - Accelerator Pedal (AP) Sensor

  • Test F - Speed Control Command Switch (SCCS)

  • Test G - Camshaft Position (CMP) Sensor

  • Test H - Exhaust Back Pressure (EBP) Sensor

  • Test J - Programmable Speedometer Odometer Module (PSOM)

  • Test JA - Vehicle Speed Sensor

  • Test K - Brake Lamp Switch

  • Test L - Check Engine Light

  • Test M - Exhaust Back Pressure Regulator (EPR)

  • Test N - Clutch Pedal Position (CPP) Switch

  • Test P - Brake Pressure Applied (BPA) Switch

  • Test Q - Parking Brake Applied (PBA) Switch

  • Test R - Glow Plug Lamp (GPL)

  • Test S - Glow Plug System

  • Test T - Fuel Delivery Command Signal (FDCS)

  • Test U - IDM Electronic Feedback (EF)

  • Test W - Injector Driver Module Enable (IDM-EN)

  • Test X - Injection Pressure Regulator (IPR)

  • Test Y - Engine Oil Temperature (EOT) Sensor

  • Test Z - Injection Control Pressure (ICP) Sensor




• Section 6 - Reference Values

  • Control System Diagnostic Sheet Reference

7.3L Diagnostics and Troubleshooting

7.3L Diagnostics and Troubleshooting

• Introduction

• Preface

• How To Use The Diagnostic Procedures

• Section 1 - Description and Operation

  • Diesel Vehicle Emissions Control Information

  • Diesel On Board Diagnostics II System

  • Malfunction Indicator Lamp (MIL)

  • Diesel Electronic EC System

  • Diesel Powertrain Control Software

  • Diesel PCM Inputs

  • Diesel PCM Outputs

  • Diesel Fuel System

  • Diesel Intake Air Systems

  • Diesel Catalyst and Exhaust Systems




• Section 2 - Diagnostic Methods

  • Diagnostic Methods

  • Diagnostic Tools and Required Equipment

  • Scan Tool Hookup

  • Quick Test Description

  • Quick Test Operation

  • Key On Engine Off (KOEO) On-Demand Self Test

  • Key On Engine Running (KOER) On-Demand Self Test

  • Retrieve and Clear Continuous DTCs

  • KOEO Injector Electrical Self Test

  • KOEO Output State Self Test

  • KOER Switch Self Test

  • KOER Cylinder Contribution Self Test

  • KOER Glow Plug Monitoring Self Test

  • Parameter Identification (PID)

  • Accumulating PCM Data

  • Analyzing PCM Data

  • On-Board System Readiness Test

  • Freeze Frame Data

  • Powertrain Control Module (PCM) Reset

  • Drive Cycles

  • Intermittent Diagnostic Techniques

  • Basic Circuit Checks




• Section 3 - Symptom Charts

  • Symptom Chart Index

  • Chart AA - Symptom Chart 1

  • Chart AB - Symptom Chart 2

  • Chart AC - Symptom Chart 3

  • Chart AD - Symptom Chart 4

  • Chart AE - Symptom Chart 5

  • Chart AF - Symptom Chart 6

  • Chart AG - Symptom Chart 7

  • Chart AH - Symptom Chart 8

  • Chart AJ - Symptom Chart 9

  • Chart AK - Symptom Chart 10

  • Chart AL - Symptom Chart 11

  • Chart AM - Symptom Chart 12

  • Chart AN - Symptom Chart 13

  • Chart AO - Symptom Chart 14




• Section 4A - Diagnostic Subroutines (F250-550 and E-Series)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description

  • Injector Performance Test

  • Camshaft Position (CMP) Sensor Test.pdf

  • Injection Pressure Regulator (IPR) Valve Test




• Section 4B - Diagnostic Subroutines (F650-750)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description




• Section 5 - Pinpoint Tests

  • Pinpoint Test Index

  • Sensor and Actuator Diagnostic Procedures

  • Component Location

  • General Procedures for Pinpoint Testing

  • Test A - Vehicle Battery

  • Test C - Reference Voltage

  • Test DA - Intake Air Temperature (IAT) Sensor

  • Test DB - Engine Oil Temperature (EOT) Sensor

  • Test DC - Injection Control Pressure (ICP) Sensor

  • Test DD - Accelerator Pedal (AP) Sensor

  • Test DE - Exhaust Back Pressure (EBP) Sensor

  • Test DF - Camshaft Position (CMP) Sensor

  • Test DG - Barometric Pressure (BARO) Sensor

  • Test DH - Manifold Absolute Pressure (MAP) Sensor, Analog

  • Test DI - Manifold Air Temperature (MAT) Sensor - 1999 F-Series and 2000 Excursion

  • Test DJ - Water in Fuel (WIF) Sensor

  • Test DK - Water in Fuel Indicator Lamp (WIFIL)

  • Test DL - Vehicle Speed Sensor

  • Test FA - Air Conditioning

  • Test FB - Brake Pressure Applied (BPA) Switch

  • Test FC - Clutch Pedal Position (CPP), Neutral Start Switch

  • Test FD - Brake Lamp Switch

  • Test FE - Idle Validation Switch (IVS)

  • Test FF - Parking Brake Applied (PBA) Switch

  • Test FG - Speed Control Command Switch (SCCS)

  • Test FH - 4x4 Low Range - F-Series and Excursion.pdf

  • Test FJ - IDM Electronic Feedback (EF)

  • Test FK - Fuel Pump Monitor, Control

  • Test H - Auxiliary Powertrain Control System

  • Test KA - Cylinder Identification (CID).pdf

  • Test KB - Exhaust Back Pressure Regulator (EPR)

  • Test KC - Glow Plug System - Without Glow Plug Control Module (GPCM)

  • Test KD - Glow Plug Indicator Lamp (GPL)

  • Test KE - Injection Pressure Regulator (IPR)

  • Test KF - Fuel Delivery Command Signal (FDCS)

  • Test KG - Tachometer

  • Test KH - Wastegate Control (WGC) Solenoid

  • Test KJ - Kickdown Solenoid Relay (Allison AT545 Transmission Downshift Function)

  • Test KL - Manifold Intake Air Heater (MIAH)

  • Test MA - Continuous Memory Failure

  • Test MB - OBD II Readiness Code

  • Test MC - PCM Inactive Background Fault

  • Test MD - PCM-ROM Failure

  • Test ME - PCM Reset

  • Test NA - Injector Driver Circuit Operation

  • Test NB - Check Engine Light

  • Test NC - Injector Driver Module Enable (IDM-EN)

  • Test QA - Unable to Activate Self Test, SCP Error, DTC Not Listed

  • Test QB - Glow Plug System - With Glow Plug Control Module (GPCM) (California)




• Section 6 - Reference Values

  • Control System Diagnostic Sheet Reference

7.3L Diagnostics and Troubleshooting

• Introduction

• Preface

• How To Use The Diagnostic Procedures

• Section 1 - Description and Operation

  • Diesel Vehicle Emissions Control Information

  • Diesel On Board Diagnostics II System

  • Malfunction Indicator Lamp (MIL)

  • Diesel Electronic EC System

  • Diesel Powertrain Control Software

  • Diesel PCM Inputs

  • Diesel PCM Outputs

  • Diesel Fuel System

  • Diesel Intake Air Systems

  • Diesel Catalyst and Exhaust Systems




• Section 2 - Diagnostic Methods

  • Diagnostic Methods

  • Diagnostic Tools and Required Equipment

  • Scan Tool Hookup

  • Quick Test Description

  • Quick Test Operation

  • Key On Engine Off (KOEO) On-Demand Self Test

  • Key On Engine Running (KOER) On-Demand Self Test

  • Retrieve and Clear Continuous DTCs

  • KOEO Injector Electrical Self Test

  • KOEO Output State Self Test

  • KOER Switch Self Test

  • KOER Cylinder Contribution Self Test

  • KOER Glow Plug Monitoring Self Test

  • Parameter Identification (PID)

  • Accumulating PCM Data

  • Analyzing PCM Data

  • On-Board System Readiness Test

  • Freeze Frame Data

  • Powertrain Control Module (PCM) Reset

  • Drive Cycles

  • Intermittent Diagnostic Techniques

  • Basic Circuit Checks




• Section 3 - Symptom Charts

  • Symptom Chart Index

  • Chart AA - Symptom Chart 1

  • Chart AB - Symptom Chart 2

  • Chart AC - Symptom Chart 3

  • Chart AD - Symptom Chart 4

  • Chart AE - Symptom Chart 5

  • Chart AF - Symptom Chart 6

  • Chart AG - Symptom Chart 7

  • Chart AH - Symptom Chart 8

  • Chart AJ - Symptom Chart 9

  • Chart AK - Symptom Chart 10

  • Chart AL - Symptom Chart 11

  • Chart AM - Symptom Chart 12

  • Chart AN - Symptom Chart 13

  • Chart AO - Symptom Chart 14




• Section 4A - Diagnostic Subroutines (F250-550 and E-Series)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description

  • Injector Performance Test

  • Camshaft Position (CMP) Sensor Test.pdf

  • Injection Pressure Regulator (IPR) Valve Test




• Section 4B - Diagnostic Subroutines (F650-750)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description




• Section 5 - Pinpoint Tests

  • Pinpoint Test Index

  • Sensor and Actuator Diagnostic Procedures

  • Component Location

  • General Procedures for Pinpoint Testing

  • Test A - Vehicle Battery

  • Test C - Reference Voltage

  • Test DA - Intake Air Temperature (IAT) Sensor

  • Test DB - Engine Oil Temperature (EOT) Sensor

  • Test DC - Injection Control Pressure (ICP) Sensor

  • Test DD - Accelerator Pedal (AP) Sensor

  • Test DE - Exhaust Back Pressure (EBP) Sensor

  • Test DF - Camshaft Position (CMP) Sensor

  • Test DG - Barometric Pressure (BARO) Sensor

  • Test DH - Manifold Absolute Pressure (MAP) Sensor, Analog

  • Test DI - Manifold Air Temperature (MAT) Sensor

  • Test DJ - Water in Fuel (WIF) Sensor

  • Test DK - Water in Fuel Indicator Lamp (WIFIL)

  • Test DL - Vehicle Speed Sensor

  • Test DM - Engine Coolant Temperature (ECT) Sensor - Manual Transmission Only.pdf

  • Test FA - Air Conditioning

  • Test FB - Brake Pressure Applied (BPA) Switch

  • Test FC - Clutch Pedal Position (CPP), Neutral Start Switch

  • Test FD - Brake Lamp Switch

  • Test FE - Idle Validation Switch (IVS)

  • Test FF - Parking Brake Applied (PBA) Switch

  • Test FG - Speed Control Command Switch (SCCS)

  • Test FH - 4x4 Low Range - F-Series and Excursion.pdf

  • Test FJ - IDM Electronic Feedback (EF)

  • Test FK - Fuel Pump Monitor, Control

  • Test H - Auxiliary Powertrain Control System

  • Test KA - Cylinder Identification (CID).pdf

  • Test KB - Exhaust Back Pressure Regulator (EPR)

  • Test KC - Glow Plug System - Without Glow Plug Control Module (GPCM)

  • Test KD - Glow Plug Indicator Lamp (GPL)

  • Test KE - Injection Pressure Regulator (IPR)

  • Test KF - Fuel Delivery Command Signal (FDCS)

  • Test KG - Tachometer

  • Test KH - Wastegate Control (WGC) Solenoid

  • Test KJ - Kickdown Solenoid Relay (Allison AT545 Transmission Downshift Function)

  • Test KL - Manifold Intake Air Heater (MIAH)

  • Test MA - Continuous Memory Failure

  • Test MB - OBD II Readiness Code

  • Test MC - PCM Inactive Background Fault

  • Test MD - PCM-ROM Failure

  • Test ME - PCM Reset

  • Test NA - Injector Driver Circuit Operation

  • Test NB - Check Engine Light

  • Test NC - Injector Driver Module Enable (IDM-EN)

  • Test QA - Unable to Activate Self Test, SCP Error, DTC Not Listed

  • Test QB - Glow Plug System - With Glow Plug Control Module (GPCM) (California)

  • Test QC - Electronic Throttle Control (ETC)




• Section 6 - Reference Values

  • Control System Diagnostic Sheet Reference

7.3L Diagnostics and Troubleshooting

• Introduction

• Preface

• How To Use The Diagnostic Procedures

• Section 1 - Description and Operation

  • Diesel Vehicle Emissions Control Information

  • Diesel On Board Diagnostics II System

  • Malfunction Indicator Lamp (MIL)

  • Diesel Electronic EC System

  • Diesel Powertrain Control Software

  • Diesel PCM Inputs

  • Diesel PCM Outputs

  • Diesel Fuel System

  • Diesel Intake Air Systems

  • Diesel Catalyst and Exhaust Systems




• Section 2 - Diagnostic Methods

  • Diagnostic Methods

  • Diagnostic Tools and Required Equipment

  • Scan Tool Hookup

  • Quick Test Description

  • Quick Test Operation

  • Key On Engine Off (KOEO) On-Demand Self Test

  • Key On Engine Running (KOER) On-Demand Self Test

  • Retrieve and Clear Continuous DTCs

  • KOEO Injector Electrical Self Test

  • KOEO Output State Self Test

  • KOER Switch Self Test

  • KOER Cylinder Contribution Self Test

  • KOER Glow Plug Monitoring Self Test

  • Parameter Identification (PID)

  • Accumulating PCM Data

  • Analyzing PCM Data

  • On-Board System Readiness Test

  • Freeze Frame Data

  • Powertrain Control Module (PCM) Reset

  • Drive Cycles

  • Intermittent Diagnostic Techniques

  • Basic Circuit Checks




• Section 3 - Symptom Charts

  • Symptom Chart Index

  • Symptom Charts




• Section 4A - Diagnostic Subroutines (F250-550 and E-Series)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description

  • Injector Performance Test

  • Camshaft Position (CMP) Sensor Test.pdf

  • Injection Pressure Regulator (IPR) Valve Test




• Section 4B - Diagnostic Subroutines (F650-750)

  • Hard Start or No Start Diagnostic Procedures

  • Performance Diagnostic Procedures

  • Diagnostic Trouble Code Description




• Section 5 - Pinpoint Tests

  • Pinpoint Test Index

  • Sensor and Actuator Diagnostic Procedures

  • Component Location

  • General Procedures for Pinpoint Testing

  • Test A - Vehicle Battery

  • Test C - Reference Voltage

  • Test DA - Intake Air Temperature (IAT) Sensor

  • Test DB - Engine Oil Temperature (EOT) Sensor

  • Test DC - Injection Control Pressure (ICP) Sensor

  • Test DD - Accelerator Pedal (AP) Sensor

  • Test DE - Exhaust Back Pressure (EBP) Sensor

  • Test DF - Camshaft Position (CMP) Sensor

  • Test DG - Barometric Pressure (BARO) Sensor

  • Test DH - Manifold Absolute Pressure (MAP) Sensor, Analog

  • Test DI - Manifold Air Temperature (MAT) Sensor

  • Test DJ - Water in Fuel (WIF) Sensor

  • Test DK - Water in Fuel Indicator Lamp (WIFIL)

  • Test DL - Vehicle Speed Sensor

  • Test DM - Engine Coolant Temperature (ECT) Sensor - Manual Transmission Only.pdf

  • Test FA - Air Conditioning

  • Test FB - Brake Pressure Applied (BPA) Switch

  • Test FC - Clutch Pedal Position (CPP), Neutral Start Switch

  • Test FD - Brake Lamp Switch

  • Test FE - Idle Validation Switch (IVS)

  • Test FF - Parking Brake Applied (PBA) Switch

  • Test FG - Speed Control Command Switch (SCCS)

  • Test FH - 4x4 Low Range - F-Series and Excursion.pdf

  • Test FJ - IDM Electronic Feedback (EF)

  • Test FK - Fuel Pump Monitor, Control

  • Test H - Auxiliary Powertrain Control System

  • Test KA - Cylinder Identification (CID).pdf

  • Test KB - Exhaust Back Pressure Regulator (EPR)

  • Test KC - Glow Plug System - Without Glow Plug Control Module (GPCM)

  • Test KD - Glow Plug Indicator Lamp (GPL)

  • Test KE - Injection Pressure Regulator (IPR)

  • Test KF - Fuel Delivery Command Signal (FDCS)

  • Test KG - Tachometer

  • Test KH - Wastegate Control (WGC) Solenoid

  • Test KJ - Kickdown Solenoid Relay (Allison AT545 Transmission Downshift Function)

  • Test KL - Manifold Intake Air Heater (MIAH)

  • Test MA - Continuous Memory Failure

  • Test MB - OBD II Readiness Code

  • Test MC - PCM Inactive Background Fault

  • Test MD - PCM-ROM Failure

  • Test ME - PCM Reset

  • Test NA - Injector Driver Circuit Operation

  • Test NB - Check Engine Light

  • Test NC - Injector Driver Module Enable (IDM-EN)

  • Test QA - Unable to Activate Self Test, SCP Error, DTC Not Listed

  • Test QB - Glow Plug System - With Glow Plug Control Module (GPCM) (California)

  • Test QC - Electronic Throttle Control (ETC)




• Section 6 - Reference Values

  • Control System Diagnostic Sheet Reference

7.3L Diagnostics and Troubleshooting