Zero Cool
3rd July, 2023, 03:27 PM
Hello,
I am looking for information on programming Toyota Tundra Odometers that use the 93C66 chip. I am looking to understand just how the programming is written. I have done a LOT of experimentation and have learned quote a bit but i am not quite there yet. many pieces of the puzzle i am still missing. I have learned that The clusters write in a 17 bit wear leveling scheme. I have been able to write 0-8 and in bites of 17, so i can program 17 miles, 170, 1700, 17000 etc and multiples of that. 34, 340, 3400 etc but have not yet figure out how to write 9-16 to the cluster yet. again this is all been hacking so far so i am still learning.
So for my purposes i can rebuild clusters and reset them to zero miles. that was my main goal. but it would be nice to fully understand how these work so that way i could offer an exchange service and be able to program them to match a customers core unit. (all that sounds much more business like then it really is. I really hate the orange look of my cluster and i changed the LEDs to white and people have asked me if i could do the same for them.)
I like puzzles and hacking and I am having a blast digging into this and learning. I see that Mr. Clusters is the resident expert. I saw his posts on another forum as well and hope to have a conversation with him. per his request on his many post's. i am posting here and not sending him a PM. yes sir i can read! and will be happy to give thanks, thumbs up etc.
Some posts here mentioned flashing. I have discovered that if something is not written correctly, or of the eprom contents don't match for some reason, the odometer will flash. for example. 2011-2013 clusters are different then 2008-2010 clusters. In 2011 they added the flex fuel capability to the trucks and i think that may be why the change....there may be more differences i am not sure but...If i take the contents of a 2011 cluster and program it into a 2008 cluster, i get the flashing error...However. If i take the 2008 eprom and hand change the values to the same values in the 2011 cluster. it works and no flashing.
I have acquired a Ch341A and did the 5v mod. Thank you Dr. Shock. I have the ASprogrammer software as well as Tachosoft(really buggy) and Neoprogrammer as well.
I would like to collect some bin files. would be happy to make some donations if i could get bin files for something like 1 mile, 10miles, 100miles etc maybe i can learn what changes with each. and would be Happy to report my findings so all can learn!
Happy to Be Here! let the games begin!
ZC
I am looking for information on programming Toyota Tundra Odometers that use the 93C66 chip. I am looking to understand just how the programming is written. I have done a LOT of experimentation and have learned quote a bit but i am not quite there yet. many pieces of the puzzle i am still missing. I have learned that The clusters write in a 17 bit wear leveling scheme. I have been able to write 0-8 and in bites of 17, so i can program 17 miles, 170, 1700, 17000 etc and multiples of that. 34, 340, 3400 etc but have not yet figure out how to write 9-16 to the cluster yet. again this is all been hacking so far so i am still learning.
So for my purposes i can rebuild clusters and reset them to zero miles. that was my main goal. but it would be nice to fully understand how these work so that way i could offer an exchange service and be able to program them to match a customers core unit. (all that sounds much more business like then it really is. I really hate the orange look of my cluster and i changed the LEDs to white and people have asked me if i could do the same for them.)
I like puzzles and hacking and I am having a blast digging into this and learning. I see that Mr. Clusters is the resident expert. I saw his posts on another forum as well and hope to have a conversation with him. per his request on his many post's. i am posting here and not sending him a PM. yes sir i can read! and will be happy to give thanks, thumbs up etc.
Some posts here mentioned flashing. I have discovered that if something is not written correctly, or of the eprom contents don't match for some reason, the odometer will flash. for example. 2011-2013 clusters are different then 2008-2010 clusters. In 2011 they added the flex fuel capability to the trucks and i think that may be why the change....there may be more differences i am not sure but...If i take the contents of a 2011 cluster and program it into a 2008 cluster, i get the flashing error...However. If i take the 2008 eprom and hand change the values to the same values in the 2011 cluster. it works and no flashing.
I have acquired a Ch341A and did the 5v mod. Thank you Dr. Shock. I have the ASprogrammer software as well as Tachosoft(really buggy) and Neoprogrammer as well.
I would like to collect some bin files. would be happy to make some donations if i could get bin files for something like 1 mile, 10miles, 100miles etc maybe i can learn what changes with each. and would be Happy to report my findings so all can learn!
Happy to Be Here! let the games begin!
ZC