Symbol 3752 from ISO 7000 - Title/Meaning: Diagnostic port, general Function/description: To identify the location of the port to which diagnostic equipment is connected. To indicate that the diagnostic port is in use.
pay attention to orientation of symbolAdditional information: 
This symbol does not specify the machine system, component, or function. For specific machine systems, components, or functions, add a symbol element to identify the system, component, or function.
Own work using: iso.org/obp/graphics/grs/0fd13c41-74c5-42c8-b045-9b786cc9289e 200.png
Vectorization:  Mrmw