New test report: FoxFlash programming (read/write) John Deere 6430 premium engine control L14 via OBD port successfully.
Connect foxflash with laptop and John deere via OBD
In Foxflash software, select John Deere-> 6230-6330-6430 Premium->4.5L ENG CNTR L14′ CAN
Foxflash read data very fast. Needs around 14v though. Then save data.
Vehicle starts fine.