The Z059 helps you find the VSS signal-pulse that is required by a Taximeter to understand distance, all you need, is to plug it into the OBD port on any CAN vehicle and your installation is complete. 

Please note that generally, vehicles made after 2008 may use the CAN only version. The CAN/ISO unit is intended for use only in older, pre 2008, Asian model vehicles (Toyota, Honda, Nissan, etc.). If you are not sure which model your vehicle requires, please contact us.