Toyota and Lexus Firmware 89663-35C00-A
A catalog reference for Toyota and Lexus calibration identifier 89663-35C00-A and the related 89663-35C00 entry.
89663-35C00-A is a Toyota or Lexus calibration identifier related to the catalog entry 89663-35C00. The 89663 part-number family is associated with engine control software, so this entry tentatively belongs to an engine control module calibration.
What the calibration family controls
An engine control module uses sensor inputs to manage functions such as fuel delivery, ignition timing and emissions control. Those are general functions of the controller family, not confirmed changes made by revision 89663-35C00-A.
The available catalog entry does not identify a vehicle application or describe a specific software change for the -A identifier. The full identifier should therefore be retained when comparing calibration records.