Toyota and Lexus Firmware 89663-12B31.bin
A catalog reference for Toyota or Lexus firmware 89663-12B31.bin and its calibration identifier.
89663-12B31.bin is cataloged under the identifier 89663-12B31. Its 89663 part-number family is associated with Toyota engine control calibrations, which provide operating parameters used by an engine control module to manage the powertrain.
That family association is tentative for this file. The catalog entry does not establish a specific vehicle, engine or software change, and the identifier alone does not confirm what this revision controls differently from another calibration.