Tips on how to Make a VAG-COM Cable

    1

    Cut the 4 wire USB cable towards the desired general length as much as 9 feet using the wire cutting tool.
    2

    Remove 1 inch in the outer insulation on each and every finish to reveal the 4 wires inside Auto diagnostic tools. If there's a metal braided sheath defending the inner wires, fold it back away from the inner wires.
    3
    Using a wire cutter prevents damage to the cable.    Using a wire cutter prevents damage to the cable.

    Remove 1/2 inch of your insulation in the tips in the four inner wires, leaving the copper wires exposed.
    4

    Thread the exposed inner wires on one end in the cable into the USB connector in pin-out order. Solder the wires firmly into place and attach the outer jacket.
    5
    Solder attaches the wires to the connector.    Solder attaches the wires to the connector.

    Thread the exposed inner wires of your opposite finish with the cable into the OBD-II CAN connector Auto code scanner. Follow the same pin-out order as was used for the USB connector, with the same color wires for the data, ground and vbus. Solder the wires firmly into place and attach the outer jacket.