Toyota Firmware 89663-42C31: Calibration Catalog Reference
A concise reference to Toyota calibration identifier 89663-42C31 and its engine control module software family.
89663-42C31 is a Toyota automotive calibration identifier associated with the engine control module software family. Its exact vehicle application and the behavior specific to this calibration are not established by the identifier alone.
What the calibration family controls
In a typical engine control application, the module uses software calibrations to manage functions such as fuel delivery, ignition timing and emissions-related operation. The association with this controller family is tentative for 89663-42C31, and those general functions do not establish what changed in this particular revision.
The complete identifier matters when comparing records. A calibration with a similar prefix or a nearby suffix should not be assumed to have the same application or software behavior.