???? SAE J1939 + OBD2. 9-Pin Deutsch (SAE J1939) OBD2 / 16-Pin (CAN, J1939 over OBD). ✔ Communication protocols: SAE J1939 (primary heavy-duty standard) & full OBD2 protocols for diagnostics. John Deere Code Reader | Heavy-Duty Full System Diagnostic Scanner.
