Toyota Firmware 89663-0CM31: Calibration Catalog Reference
A concise catalog reference for Toyota firmware identifier 89663-0CM31 and its control module family.
Toyota firmware 89663-0CM31 is a calibration identifier in the 89663 part-number family, which is generally associated with engine control module software. That family association is tentative for this exact identifier. The specific vehicle application and the behavior controlled by this calibration are not established here.
What the identifier represents
An engine control module uses calibration data to manage functions such as fuel delivery, ignition timing and emissions controls. Those are general controller functions, not documented changes made by revision 89663-0CM31.
The complete identifier is important when comparing calibration records. A similar-looking 89663 number does not establish the same vehicle application, software behavior or compatibility.