Conditions for Setting the DTC

The random access memory (RAM) of the TCCM has failed an operational test indicating that some portions of RAM are not functional.
The read only memory (ROM) or the masked ROM of the TCCM has failed the Checksum test indicating that the data is not currently valid.
The critical operational parameters stored in the EEPROM of the TCCM have failed the Checksum test indicating invalid data.