What is DTK?
DTK stands for Diagnostic Toolkit, specifically the Cummins Guidanz® Diagnostic Toolkit (GDTK).
Expected result
You understand the purpose of DTK and can identify the platform, access, adapter, equipment, and feature requirements for the workflow you need to perform.
Important notes / prerequisites
Users must register and log in to access the DTK home page. The subscription level determines which functionality is available.
A compatible datalink adapter is required, but the supported connection method depends on the platform and equipment. Some functions require internet connectivity, while other workflows support offline use.
Do not treat these requirements as universal. Confirm the platform, subscription, equipment or controller type, and feature being used before starting a workflow.
What DTK does
DTK is a service and diagnostic application used to connect to Cummins engines, ECMs (Electronic Control Modules), and supported controllers. Depending on the user's subscription and equipment, DTK can be used to:
- Read and clear fault codes.
- Prioritize faults and assist with troubleshooting.
- Monitor live engine or controller parameters.
- View and modify engine or device settings.
- Run diagnostic tests.
- Update ECM or controller calibrations.
- Create ECM images containing faults, settings, and audit-trail information.
- Create and work through Diagnostic Sessions.
- View audit trails.
- Perform Immediate Assessments.
- Work with supported Power Generation controllers on Windows.
DTK is the interface between a technician and the equipment's electronic controls, providing tools to identify problems, troubleshoot them, change supported settings, and perform service operations.
Windows procedure
A typical engine workflow is:
- Log in.
- Select a function.
- Select and connect the appropriate adapter.
- Connect to the ECM.
- Complete intake.
- Review Equipment Summary and open the Device Dashboard.
- Perform the required diagnostic or service function.
This sequence varies by feature and equipment. Scan Faults, Immediate Assessment, calibration, offline Diagnostic Sessions, and Power Generation workflows may use different steps.
Common problems
A common source of confusion is assuming that DTK Mobile and DTK Windows behave exactly the same. They share many core diagnostic functions, but their platform workflows and supported capabilities differ.
DTK Mobile differences
DTK is available as a Windows PC application and a Mobile app. DTK Mobile uses mobile-specific adapter pairing and supports the INLINE Mini, including automatic firmware updates when required. Mobile also includes device-specific behaviors such as lock-screen notifications and mobile sharing or import workflows.
The Windows application includes workflows that are not described the same way in the Mobile material, particularly around Power Generation.