Shelter in Place Order: Illinois

Until the Shelter In Place order for Illinois is lifted, the Woodridge Product Support Center will be prioritizing shipments to support critical orders. For critical orders, please select FedEx - Priority Overnight as the shipping method and create a Tools case file that includes the order number and VIN. In most cases, critical orders will be shipped the following business day. All other orders will be shipped as resources allow.

Canadian Retail Sales

The Navistar Product Support Center has temporarily disabled retail catalog sales in Canada. Please contact a local International® dealership to purchase tools or software. International® dealerships can be located using the tool at

We apologize for the inconvenience.

Image shown may not be actual product.

Software, Diamond Logic Builder (DLB) - Parent Part
Product Number DLB

Diamond Logic Builder (DLB) provides high performance diagnostics for the electrical systems on high performance International trucks and IC Buses. DLB Fleet displays vehicle signals in graphical and text format. This software also reads and displays vehicle diagnostic trouble codes as well as vehicle features and parameters.

*** The product key is good for one year. Product keys are not renewed or extended after the license has expired. A new product key must be purchased annually in order to continue using this product.***


Delivery Type:
ToolTip Combination Not Valid.
To buy, select Delivery Type.

Applicable to:
Chassis Software

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.

Diamond Logic® Builder has different tiered permission levels allowing for more advanced use of the software.

  • Level 1 (Diagnostics) – L1 is included with active product key.
  • Level 2 (Diagnostics and Parameter Programming) – L2 access requires completion of web based training for each user.
  • Level 3 (Diagnostics, Parameter Programming and Advanced Logic) – L3 access requires completion of Instructor Led training for each user.

Level 1

Formal training is not required.


Level 2: Basic Programming (Web-Based)

Web-Based DLB training for customers can be accessed at Customers can either login with an existing account or register for a new one.

  • Introduction to Diamond Logic Electrical Systems AND Diamond Logic Builder Introduction and Usage
  • OR
  • Diamond Logic Builder Level 2 Retail Course (8982)

NOTE: After successfully completing DLB L2 web based training (Free), the customer is required to submit their User ID (Training Portal ID) and CYY to to request Level 2 access. The PSC will validate that you have completed your training, grant the appropriate access and contact you via email.


Level 3: Advanced Logic (Instructor Led)

Please contact to schedule your training.

NOTE: DLB Level 2 and 3 software requires a product key for each computer.

Minimum Requirements
  • 150MB of free hard disk space
  • An Internet connection
Recommended Requirements
  • Pentium 4 class process with a minimum 1 GHz of speed
  • 512 MB of RAM
  • 150MB of free hard disk space
  • Operating System of Windows® 7 or Vista
  • One or more RP1210A compatible communication devices
  • Any type of high speed Internet connection

NOTE: The new version of DLB runs on Windows® 10. The old version of DLB that was previously sold on CD and is a non-updating version will not run on Windows® 10. If you still have the old version we highly recommend that you purchase the new license to the latest version of DLB for it to work properly on Windows® 10.

Recommended Adapters
  • NEXIQ™ Technologies – USB-Link2
  • Dearborn Group Technologies – DPA 5
  • Noregon® Systems, Inc. – DLA+, DLA+ Wireless
Communication Link Drivers
  • DLB uses standard RP1210A drivers for communication. The drivers are specific to the communications device and are not installed with DLB.
This product can be found in the following kits:
NAV-NED-DLB  NavKal Pro, NED and DLB Software Bundle (Electronic Delivery)
NavKal Pro, NED and DLB Software Bundle (Electronic Delivery)
NavKal-Pro - 1 Year - NavKal™ is an Electronic Control
NED-DLB-HeRo  NED, DLB and HeRo Software Bundle (Electronic Delivery)
NED, DLB and HeRo Software Bundle (Electronic Delivery)
NED - 1 Year - Navistar® Engine Diagnostics is a diagnostic
Product and price information are subject to change without notice.