Noregon has expanded its JPRO diagnostic software with Update 2026, V.1, which includes enhanced CAN bus diagnostics, guided troubleshooting, and broader OEM coverage. The update integrates CAN bus testing with JPRO’s Repair Mentor feature to help technicians locate open circuits, disconnected wiring, and shorts while graphing live data to identify root causes. New coverage also includes Mack and Volvo VN4 architecture, along with bidirectional tests for Cummins and Eaton components.