Toyota Firmware 89663-28561: Engine Control Calibration
A catalog reference for Toyota firmware 89663-28561 and its engine control calibration family.
89663-28561 is a Toyota engine control calibration identifier in the 89663 part-number family. This family is associated with software used by an engine control module, or ECM, to manage engine operation.
What the calibration controls
The ECM uses sensor information to govern functions such as fuel delivery, ignition timing and emissions control. Its calibration contains the settings and maps that help the controller make those decisions under different operating conditions.
The identifier 89663-28561 identifies a particular calibration, but the number alone does not establish its vehicle application or a specific change made in this revision. It should be distinguished from the ECM hardware part number and from other 89663 calibrations with similar prefixes.