Programming and Relearning

Flash Electrically Erasable Programmable Read Only Memory (FEEPROM)

The Flash Electrically Erasable Programmable Read Only Memory (FEEPROM) is an Integrated Circuit (IC) within the PCM. This integrated circuit contains the software code required by the PCM to control the powertrain. One feature of the FEEPROM is that it can be electrically erased then reprogrammed without removing the PCM from the vehicle. If a software change is required to the PCM, the module no longer needs to be replaced, but can be reprogrammed through the Worldwide Diagnostic System (WDS) or New Generation STAR (NGS) Tester. The reprogramming is done through the DLC.