Odometer adjustment? - Toyota Yaris Forums

advocate · 12-22-2011, 05:26 PM

message goes here

CTScott · 12-22-2011, 05:58 PM

There are a few places that you can send them to for reprogramming (do a google search for odometer reprogramming). It turns out that you actually have to remove the EEPROM where the data is stored, reprogram it, and solder it back onto the board.

I have monkeyed around with it a bit with some of my spare clusters. I was hoping to find that I could clip a piggy back socket on the chip and reprogram it in place, but unfortunately that doesn't work.

CTScott · 12-22-2011, 08:34 PM

$350 Ouch! The process is actually fairly easy (desolder the 8 pin EEPROM, run the mileage through a magic program that generates the checksum to go along with that value, reprogram the EEPROM with the modified data, and solder it back down).

It is kind of a shady thing though, as theoretically here in the US it is illegal to modify a cars odometer. If the odometer is modified or replaced it must be documented (and that info even appears in a carfax on the car).

CTScott · 01-08-2012, 02:23 PM

No. They can't be switched from KM to Mi.

12-22-2011, 05:26 PM	#1
advocate Drives: car Join Date: Oct 2008 Location: location Posts: 1,033	title goes here message goes here Last edited by advocate; 03-17-2017 at 06:05 PM.

12-22-2011, 05:58 PM	#2
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	There are a few places that you can send them to for reprogramming (do a google search for odometer reprogramming). It turns out that you actually have to remove the EEPROM where the data is stored, reprogram it, and solder it back onto the board. I have monkeyed around with it a bit with some of my spare clusters. I was hoping to find that I could clip a piggy back socket on the chip and reprogram it in place, but unfortunately that doesn't work. __________________

12-22-2011, 08:34 PM	#3
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	$350 Ouch! The process is actually fairly easy (desolder the 8 pin EEPROM, run the mileage through a magic program that generates the checksum to go along with that value, reprogram the EEPROM with the modified data, and solder it back down). It is kind of a shady thing though, as theoretically here in the US it is illegal to modify a cars odometer. If the odometer is modified or replaced it must be documented (and that info even appears in a carfax on the car). __________________

01-08-2012, 02:23 PM	#4
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	No. They can't be switched from KM to Mi. __________________

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