# Diagnostics

Vehicle Spy allows diagnostic messages to be quickly built into diagnostic jobs using built-in diagnostic services. Vehicle Spy can also transmit diagnostic jobs and decode their responses.\
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Diagnostic jobs are built on the Setup Diagnostics screen (Spy Networks->[Diagnostics Setup](https://docs.intrepidcs.com/vspy-3-documentation/3.9.13/vehicle-spy-main-menus/main-menu-spy-networks/diagnostics/diagnostics-setup)). After a job is built, it can be launched directly from the screen by clicking the Launch button.\
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If a job is launched from the setup screen, Vehicle Spy will automatically switch to the Diagnostics screen to show you the decoded results (Figure 1). The Diagnostics screen (Spy Networks->[Diagnostics](https://docs.intrepidcs.com/vspy-3-documentation/3.9.13/vehicle-spy-main-menus/main-menu-spy-networks/diagnostics/diagnostics-view)) can also be accessed with the mouse to launch jobs and see the results.

![Figure 1: The Diagnostics screen where jobs are launched and their results can be viewed.](https://content.gitbook.com/content/jb1RvXgxzxcqgZdVpbGb/blobs/SGGLN3PnkJSM7VQS2lMX/spyDiagLauncher.jpg)