Time Since The Diagnostic Trouble Code (DTC) Was First/Last Stored
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The time in hours since the diagnostic trouble code (DTC) was first or last stored. The transmission control module (TCM) obtains the value via the Control Area Network (CAN) from the central electronic module. The time is the total time that the central electronic module has been running.
The difference between the "last" time and the "first" time is the time from the when the diagnostic trouble code (DTC) was first stored to when it was last stored. If the same amount of hours are displayed, the fault has only been detected once.