Subaru USB Diagnostic Tool for PCReliable Diagnostics for Early Subaru Models This Subaru USB Diagnostic Cable is designed specifically for early model Subaru vehicles, providing accurate access to engine and transmission systems through a Windows PC. Many older Subarus use communication protocols that generic OBD2 scanners struggle to interpret, often resulting in incomplete or unreliable data. This tool solves that problem by offering a direct and stable connection to the ECU using