Toyota and Lexus Firmware 89663-30A90
Catalog reference for Toyota and Lexus calibration identifier 89663-30A90 and its related 89663-30A90-B entry.
89663-30A90 is a Toyota or Lexus calibration identifier in the 89663 part-number family, which is associated with engine control software. Its tentative association is with the engine control module, whose software manages functions such as fuel injection and ignition timing.
The related catalog entry 89663-30A90-B carries a B suffix. The suffix distinguishes that filename, but its meaning and any differences from 89663-30A90 are not established by the catalog name. The exact vehicle application and the behavior changed by this calibration are also not identified.