Application Note AN1053 How to use VW(Volkswagen) MFSW both for CarPC and Aftermarket Stereo CarPC JoyCon Exc + BSGr(Button Signal Generator Resistive) 1. Wiring The signal of VW(Volkswagen) MFSW is CAN. You can get the CAN signal wire at the radio jack. 2. Setup of CAN steering wheel control buttons Check Setting and click CAN Scan,