HardwareAutoPi TMU CM4OBD Connector PinoutOn this pageOBD Connector PinoutThis is an image of the OBD connector pinout. It is valid for the AutoPi TMU CM4 editions generations of the AutoPi. Let's keep in touch! Thank you for choosing AutoPi. We're excited to see what you will achieve with your AutoPi device! Contact our sales team You can build on top of AutoPi . Get help from our support team Let us know about your technical questions.