For 1990-2009 cars

The Theft Deterrent Immobilizer/Keyless Entry scan tool data definitions contain a brief description of all related parameters available on the scan tool. The parameters that are available on the scan tool are listed below in alphabetical order.

Last Alarm Cause: The scan tool displays the cause of the alarm.
Last FOB Used: The scan tool displays which key fob was last used.
Last Key Pressed On FOB: The scan tool displays the last key pressed on the key fob.
2nd to Last Alarm Cause: The scan tool displays the cause of the alarm.
3rd to Last Alarm Cause: The scan tool displays the cause of the alarm.
4th to Last Alarm Cause: The scan tool displays the cause of the alarm.
5th to Last Alarm Cause: The scan tool displays the cause of the alarm.