Toyota Firmware 89663-26B90
A catalog reference for Toyota calibration identifier 89663-26B90 and its control-module family.
89663-26B90 is a Toyota calibration identifier in the 89663 part-number family, which is commonly associated with engine control software. Its association with an engine control module is tentative because the exact vehicle application and software function cannot be established from the identifier alone.
An engine control module generally manages fuel delivery, ignition and other engine operating functions using sensor inputs. That general role does not establish what this particular calibration changes or which vehicle it fits.