Toyota Firmware 89663-26P31: Calibration Catalog Reference
A concise catalog reference for Toyota firmware identifier 89663-26P31 and its control-module calibration family.
89663-26P31 is a Toyota electronic control calibration identifier in the 89663 part-number family. That family is commonly associated with engine control module software, which manages engine operation through functions such as fuel delivery and ignition timing where applicable. The association with an engine controller is tentative for this specific identifier.
The complete identifier distinguishes this calibration from other Toyota software records with similar prefixes. It does not, by itself, establish the vehicle application, engine, transmission, or a specific change introduced by this revision.