Clearing DTC's

IMPORTANT: Using the scan tool to clear the DTCs causes both the TCM and the ECM DTCs to clear, regardless of which system is being diagnosed.

Do Not clear the DTCs unless a diagnostic procedure instructs you to do so.
Clearing the DTCs also clears the Freeze Frame data. The scan tool has the capability to save any data that is stored in the Freeze Frame and then display that data at a later time (refer to Capture Info.). Once you have corrected and verified the problem, it is a good idea to clear the DTCs so that any future service work is not needlessly confused. Many of the ECM DTCs have complex test and failure conditions. Therefore, simply clearing the DTCs, exiting the diagnostics, and watching to see if the DTC sets again may not indicate whether a problem has been corrected. To verify a repair once the repair is complete. you must look up the test conditions (on the facing page to the trouble chart) and duplicate those conditions. Then if the DTC does not set. chances are good that the problem is fixed.