Toyota Firmware 89663-26322: Calibration Catalog Reference
A concise reference to Toyota firmware calibration 89663-26322 and its likely engine-control module family.
89663-26322 is a Toyota calibration identifier in a part-number family commonly associated with engine control module software. Its exact vehicle application and the behavior changed by this calibration are not established by the identifier alone.
What the controller family does
A Toyota engine control module manages engine operation using sensor inputs and programmed calibrations. Depending on the vehicle, its software can control functions such as fuel delivery, ignition timing, idle speed and emissions-related operation.
That general role does not establish which of those functions was changed by 89663-26322. A matching vehicle identification record or Toyota service bulletin would be needed to connect this exact calibration to a specific application or revision.