Turn off power to the head unit. Connect it to the PC via the main USB lead. The computer should recognize the VCOM interface, and the progress bar at the bottom of the tool will turn red, then yellow as it writes the files.
Plug the main 20-pin power block back into the machine while keeping the reset button fully compressed. Jcac10003-oc2-v1.0 Update
Locate the physical micro-hole on the outer bezel or faceplate of the stereo. Turn off power to the head unit
Insert your update-loaded FAT32 USB drive into the unit's USB port. Jcac10003-oc2-v1.0 Update