• Please click the blue arrow to download Navistar® Engine Diagnostics. ****PLEASE READ THE SOFTWARE INSTALLATION INSTRUCTIONS AND FAQ SECTION BEFORE ATTEMPTING TO INSTALL THE PRODUCT KEY INTO THE SOFTWARE****. PLEASE NOTE: If you do not currently have a DY or CY user ID, you will need to create one out of the product. WHEN CREATING A CY USER ID FROM THE PRODUCT, YOU WILL NEED TO CHANGE THE DEFAULT PASSWORD THAT IS EMAILED TO YOU. If you have an existing DY or CY user ID, make sure that your password is active. If you need to reset your password, please call dealership support at 800-527-7879 or use the Password Reset tool.

Prior to installation, a product key must be obtained for each computer on which the software is to be installed. Product keys expire after a year and must be purchased annually.

Software Installation

NOTE: It is strongly recommended that all Terminate and Stay Resident (TSR) programs like Quicktime® program, CD player programs, or Pocket PC programs are closed prior to loading or starting the software.

1. Using your web browser, navigate to the desired service software page.
2. Choose the desired software to your PC.
   • Diamond Logic Builder
   • HeRo
   • NavKal
   • Navistar Engine Diagnostics
   • MWM
3. Scroll down the page to the Download button.
4. Click Download.
5. Click Next.
6. Read through the License Agreement. When finished, click I Agree to proceed with installation.
7. When installation is complete, the final page of the wizard is displayed. Click Finish.
8. Right click on the Desktop Icon
9. Open file location
10. Locate application file and right click
11. Run as administrator
12. Enter the product key obtained for this computer and then click OK.
    • If the key was not entered correctly (or there is some other problem), an error message will be displayed. Refer to Installation Error Messages for more information. Resolve the issue indicated before proceeding.
13. Screen will appear asking if you are a new or existing user.

New Users

1. The Registration window appears. Fill in the user’s information. Required fields are indicated by an asterisk (*). Once registration is completed successfully, Click OK. An email will be sent to the address provided on the registration form. Follow the instructions provided in this email to complete the registration process. When finished, click OK in the window shown below.

IMPORTANT: You MUST change your password by following the instructions provided in the email before proceeding. The default password cannot be used to log into the application. Please see Change Password

Existing Users

IMPORTANT: Please check to ensure your password has not expired prior to authenticating the software.

1. The User Authentication window appears. Enter your username and password, then click OK.

Once you are logged in for the first time, the software will start and begin to update itself.

NOTE: The software program will not function until the user has successfully logged in at least once while connected to the network. The user may need to consult with the technical computer support staff if the program cannot connect to the Navistar site.

Any product key in the Navistar Service Software suite can generate five CYY user IDs. Only the administrator of the product key, that is the first installer of the key, can create the additional user ID’s from the program. Video – How to create additional users

Launching Software

To launch your software, do one of the following:

• Double click the software icon on the Windows desktop.
• In the Windows Start Menu, select Programs > (Software Name) > (Software Name).

The User Authentication window appears. Enter your username, password and click OK.

• Control System Monitoring
  • View
  • Record
  • Save
  • Playing Snapshot Recordings
• Diagnostic Trouble Codes
  • Retrieve, View, Clear
  • HD-OBD Freeze Frame Data
• HD-OBD Monitors
  • Monitor Results
  • Diagnostic Readiness
  • Monitor Performance Ratio
  • View, Save Print
• Service Bay Tests
  • Key On, Engine Off
    • Actuator Tests
    • Sensor Intermittent Faults
    • Cold Start Test
  • Engine Running
    • Air Management Test
    • Cylinder Cutout Test
    • Engine Fan Test (If Equip)
    • High Pressure Pump Test
    • Aftertreatment System Tests
  • Procedures
    • Sensor Calibrating
    • Part Replacement Resets
• Programmable Parameters
  • Engine Feature settings
    • View Programming
    • Change Programming
    • Service Interval Reset
• Reports
  • Activity Report and Trip Reset
  • Vehicle Report
  • Event Data Recorder

• Navistar® Engine Diagnostics
• Microsoft® Windows® Vista, or Windows 7
• Windows® 10 64bit
• 1GHz Intel Core 2 Duo, AMD Athlon X2 or better
• 2GB (32-bit) or 4GB (64-bit) of RAM
• 300MB of available hard disk space
• 1024 x 768 pixel monitor
• One or more RP1210A compatible communication devices with SAE J1708 and/or SAE J1939 support
NOTE: Make sure to close Navistar Engine Diagnostics before installing a new version

• Navistar® Engine Diagnostics
• NEXIQ Technologies – Link-2
• Dearborn Group Technologies – DPA 5
• Noregon Systems, Inc. – DLA, DLA USB

• Navistar® Engine Diagnostics
• MaxxForce 5 (2007-2009)
• MaxxForce 7 (2007-2009)
• MaxxForce 7 (2010-2012)
• MaxxForce 7 (2013-)
• MaxxForce DT, 9, 10 (2007-2009)
• MaxxForce DT, 9, 10 (2010-2012)
• MaxxForce DT, 9, 10 (2013)
• MaxxForce 11, 13 (2008-2009)
• MaxxForce 11, 13 (2010-2013)
• MaxxForce 15 (2010-2013)
• N9, N10 SCR (2014-)
• N13 SCR (2013-2014)
• N13 SCR (2015-)
• International A26 SCR (2017-)