Toyota Firmware 89663-26640: Calibration Catalog Reference
A concise reference to Toyota firmware calibration identifier 89663-26640 and its place in the 89663 software part-number family.
89663-26640 is a Toyota calibration identifier in the 89663 software part-number family, which is associated with electronic control module calibrations. Its exact vehicle application and controlled function cannot be established reliably from the identifier alone.
Control module calibrations contain settings and logic used by a vehicle’s electronic systems. The identifier distinguishes a particular calibration, but it does not by itself establish what changed in this revision or whether it applies to a specific vehicle.