Toyota 30701000.cuw Firmware: Avalon Shift Quality
Learn how Toyota calibration 30701000 relates to Avalon engine control and shift-quality service bulletins.
30701000.cuw is an engine control module calibration associated with shift quality in the Toyota Avalon. Toyota service records list calibration ID 30701000 as a previous version in bulletins covering 2005, 2006 and 2007 Avalon models.
The engine control module manages engine operation and participates in the coordination needed for automatic transmission shifts. That coordination affects how smoothly a change of gear feels to the driver. The service records connect this calibration to shift-quality concerns, but do not establish a particular shift symptom or a feature introduced by this version.
What the service bulletins say
Toyota bulletins T-TCI-2792 and EG033-07 identify 30701000 as a previous engine control calibration in the context of 2005 Avalon shift quality. Bulletin EG029-07 also lists it as a previous calibration and covers the 2006 and 2007 Avalon.
Because the ID is listed as previous, the shift-quality revision discussed in each bulletin belongs to the later calibration, not to 30701000 itself. The model years in EG029-07 describe that bulletin’s scope and do not establish that this ID applies to every vehicle it covers.
Why the full calibration ID matters
The exact identifier helps distinguish this engine control record from other Toyota firmware entries. For a vehicle experiencing a shift-quality concern, the calibration ID is one piece of service information alongside the vehicle’s identification and the applicable bulletin.