Purpose
• To determine if the ECM has detected Diagnostic Trouble Codes (DTCs) indicating conditions that could cause engine problems
• To fill out Diagnostic Form heading
• To check for abnormal sensor readings
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
Vehicle Information for Form Heading
NOTE: Before continuing diagnostic tests, fill out the form heading on Diagnostics Form EGED-290.
Entering Vehicle Information without using the EST
1. Enter the following information in the form heading:
• Technician
• Date (for warranty)
• Unit No (dealer’s quick reference for customer’s vehicle identification)
• Truck build (date)
• Complaint (for warranty)
2. Do the following procedure “Entering Vehicle Information using the EST” to complete the rest of the form heading:
Entering Vehicle Information using the EST
1. Connect the EZ-Tech® interface cable to the EST and the ATA connector.
2. Boot-up EST.
3. Select Engine Diagnostics, then International® MasterDiagnostics® II.
4. Turn the ignition switch to ON.
5. Select VIN+ icon to open VIN+ session.
6. Use the on-screen information and the following “Information List” to complete the form heading.
Information List
• Miles (for warranty)
• Hours (for warranty)
• VIN (for warranty, ordering parts, and service information) The Vehicle Identification Number is also on the door jamb on the operators side.
• Transmission: Manual/Auto
• Ambient temperature
• Coolant temperature
• Engine SN (for ordering parts and service information)
The engine serial number is stamped on a crankcase pad on the right side of the crankcase below the cylinder head. The engine serial number is also on the engine emission label on the valve cover.
Compare the Engine SN in the Vehicle Programming window of the VIN+ session with the Engine SN on the engine. The engine could have been replaced without a programming change to the ECM to upgrade the Engine SN.
• Engine HP (for correct engine application)
• Engine Family Rating Code (for warranty)
• ECM calibration
• IDM calibration
NOTE: Fill in the Turbocharger No. and Injector No. if a mismatch of components is suspected.
• Injector No. (requires removal of valve cover and high-pressure oil rail)
• Turbocharger No. (Check for plate on turbocharger – may require removal of paint from plate)
Accessing DTCs
NOTE: When opening VIN+ session to fill out form heading, the DTC window automatically appears.
NOTE: If an EST is not available, see “Accessing DTCs” in Section 3 .
1. Record all DTCs from DTC window on Diagnostic Form. See “Diagnostic Trouble Codes” –
Appendix C (page 643) for DTCs.
2. Correct problem causing active DTCs before continuing.
3. Clear DTCs.
4. Use EST to check KOEO values for temperature and pressure sensors.
Record results on Diagnostic Form.
• If engine has not been run for 8 to 12 hours, the Engine Coolant Temperature (ECT), Engine Oil Temperature (EOT), and Manifold Air Temperature (MAT) should be within 2 °C (5 °F) of each other. The Intake Air
Temperature (IAT) could be a few degrees higher or lower due to faster outside engine temperature change.
• The Injection Control Pressure (ICP) and Brake Control Pressure (BCP) values may fluctuate as much as 345 kPa (50 psi). Electromagnetic Interference (EMI) or ground shift can cause an insignificant voltage shift that does not indicate a problem.
• Engine Oil Pressure (EOP), Manifold Air Pressure (MAP), and Exhaust Back Pressure (EBP) values may fluctuate as much as 7 kPa (1 psi). Electromagnetic Interference (EMI) or ground shift can cause an insignificant voltage shift that does not indicate a problem.
• Barometric Absolute Pressure (BAP) values should equal the barometric reading for your region.
• Are values normal?
• If abnormal values are suspected, record on Diagnostic Form and see Operational Voltage tables in Section 7 (page 283) for applicable sensor.
5. Continue with KOEO Standard Test.
Reading DTCs
ATA code: Codes associated with a Subsystem Identifier (SID), Parameter Identifier (PID), and Failure Mode Indicator (FMI)
DTC: Diagnostic Trouble Code
Status: Indicates active or inactive DTCs
• Active: With the ignition switch on, active indicates a DTC for a condition currently in the system. When the ignition switch is turned off, an active DTC becomes inactive. (If a problem remains, the DTC will be active on the next ignition switch cycle and the EST will display active/inactive.)
• Inactive: With the ignition switch on, inactive indicates a DTC for a condition during a previous key cycle. When the ignition switch is turned to OFF, inactive DTCs from a previous ignition switch cycle, remain in the ECM memory until cleared.
• Active/Inactive: With the ignition switch on, active/inactive indicates a DTC for a condition currently in the system and was present in previous key cycles, if the codes were not cleared.
Description: Defines each DTC
Possible Causes
• Electronics failure
• Failure of the ICP sensor or ICP system
• Failure of the Air Management System (AMS)
• Failure of Diamond Logic® engine brake