Visteon instrument clusters (IC) on a Facelift MK6 Fiesta seem to no longer have their own EEPROM chip yet, and it’s instead stored on the following MCU, with serial pins highlighted below
The two EEPROM looking chips on the board are instead CAN chips, with one being a CAN transciever (Infineon TLE6250G), and one being a CAN driver (NXP TJA1040)
MC9S12H256VPV read/write pinout:
todo: where the fuck are the odometer values/how are they being stored
seems like at the end of the chip, repeats 20-30 times, in the following byte format
XX XX YY ZZ
where:
bytes XX XX seem to be mileage (though hard to determine how as yet)
byte YY seems to always be FF, or 255
and byte ZZ seems to be some random value, unsure if this plays into mileage, or is some sort of checksum as it’s different on each iteration of the mileage (wtf)