Toyota and Lexus Firmware 3YWK0400-FJ-2009-4WD AT-SUPERCHARGE.cuw
Catalog details for 3YWK0400-FJ-2009-4WD AT-SUPERCHARGE.cuw and its vehicle and variant labels.
3YWK0400-FJ-2009-4WD AT-SUPERCHARGE.cuw is a firmware catalog filename that identifies an FJ application with 2009, four-wheel-drive and automatic-transmission labels. Its SUPERCHARGE label describes a supercharged variant, but the filename alone does not establish which control module the file programs or what changes it makes.
What the variant label means
A supercharger uses engine power to compress the incoming air, allowing more air into the engine. An engine configured for forced induction needs appropriate fuel and ignition control to operate under boost. The filename associates this file with a supercharged configuration, rather than establishing that it is a stock calibration or specifying its boost and fueling settings.
The complete identifier, including 3YWK0400 and the .cuw extension, distinguishes this entry from other files. The filename labels alone do not confirm an exact vehicle fitment, controller family or revision history.