I finally cracked the Odometer and SRS ECU code

[jack black]

If you read the whole thing, he used free PonyProg software to read and write to EEPROM.

[CTScott]

Originally Posted by jack black

If you read the whole thing, he used free PonyProg software to read and write to EEPROM.

Correct, but reading and writing is the easy part. Correctly modifying the data is the key part. The one he does in that link is an old and easy one (especially with the 9346, 8 pin DIP, instead of a surface mount SOIC or TSSOP. The TSSOPs on some of the new Toyota and Lexus cars are so hard to remove and resolder, as the pin spacing is half of the SOIC pin spacing.

The more modern, the more complex for the coding, and every model of Toyota vehicle that I have done has been slightly to completely different.