The Diagnostic Executive

The Diagnostic Executive is the name given to a portion of the of the control module programming stored in the EEPROM. The functions of the Diagnostic Executive are as follows:

^ To monitor on-board diagnostic test status information

^ To record on-board diagnostic test status information

^ To record pending DTCs

^ To record current DTCs

^ To turn the MIL ON

^ To store and erase Freeze Frame/Failure Records data

^ To turn the MIL OFF

^ To record History DTCs