XTOOL OBD2 Breakout Box with 4 Cables-Prof OBD2 Pin Jumping XTOOL OBD2 Breakout Box is a device that allows easy access to every pin in a vehicle's OBD2 diagnostics port. This is essential for integration testing, expediting on-board programming and streamlining the troubleshooting process by simplifying the access to test signals. The integrated LED array is perfect for determining which OBD2 pins are active and functional on the vehicle.