Toyota and Lexus Firmware 89663-60C20-A

89663-60C20-A is a Toyota or Lexus calibration identifier in the 89663 part-number family, which is associated with engine control module software. The engine control module manages engine operation using sensor inputs to calculate functions such as fuel delivery and ignition timing.

Calibration and application

The related catalog entry 89663-60C20 shares the base identifier. The available catalog information does not establish what the -A suffix denotes, a specific vehicle application, or a change made by this revision.

The engine-control association is tentative. A vehicle identification number and the control module’s current calibration information are needed to establish whether this identifier applies to a particular vehicle.