The VOCOM 1 interface (part number 88890300) is a rugged, first-generation diagnostic communication unit that connects a PC or laptop to a vehicle's Electronic Control Units (ECUs). It serves as the hardware link that allows the Premium Tech Tool software to read fault codes, monitor live data streams, program ECUs, and perform system calibrations on a wide range of vehicles.
Connect the heavy-duty USB cable to a high-power USB port on your laptop (avoid using unpowered USB hubs). Verifying the Device Status Watch the LED indicators on the face of the Vocom 1: