Toyota 89663-47603 Firmware: P261093 Calibration
Toyota 89663-47603 is an updated engine control calibration associated with a malfunction indicator light and diagnostic code P261093.
Toyota firmware 89663-47603 is an updated engine control calibration associated with a malfunction indicator light and diagnostic trouble code P261093. Toyota service records identify the full calibration as 896634760300, matching the catalog file 89663-47603.bin.
The engine control module manages engine operation and monitors its own control functions. P261093 concerns the engine control module’s internal engine-off timer performance. In practice, the documented condition can illuminate the malfunction indicator light, commonly called the check-engine light, and leave the code stored for diagnosis.
What the updated calibration addresses
Toyota service bulletins T-SB-0013-19 and T-TCI-5191 list 896634760300 as an updated calibration for the P261093 malfunction indicator light condition. The bulletins describe the service issue and the calibration revision, rather than a change to a driver-selectable feature.
The records cover several Toyota vehicles, including Prius and Prius Prime models, as well as other models in the bulletins’ broader scope. That multi-vehicle scope does not establish that 89663-47603 applies to every vehicle listed. The full calibration identifier is the relevant distinction when comparing this entry with other Toyota firmware records.
The catalog filename carries no named modified-variant label. Its documented significance is the updated calibration’s association with the P261093 condition, not a stated performance modification.