If you provide 9v to the INH pin of the seat computer they can stay awake but without memory it depends on the chip is the location of the TJA1054 and TJA1043 pin
https://www.nxp.com/docs/en/data-sheet/TJA1043.pdf
https://www.nxp.com/docs/en/data-sheet/TJA1054.pdf
