Use MaxiScan MS509 Scanner to erase diagnostic trouble codes

CAUTION: Erasing the Diagnostic Trouble Codes may allow the Maxiscan MS509 scan tool to delete not only the codes from the vehicle’s on-board computer, but also “Freeze Frame” data and manufacturer specific enhanced data. Further, the I/M Readiness Monitor Status for all vehicle monitors is reset to Not Ready or Not Complete status. Do not erase the codes before the system has been checked completely by a technician.   

This function is performed with key on engine off (KOEO). Do not start the engine.

1)   Use UP/DOWN scroll buttons to select Erase Codes from Diagnostics Menu and press ENTER button.

2)   A warning message comes up asking for your confirmation.       

If you do not want to proceed with erasing codes, press ESC button or use LEFT/RIGHT scroll button to select NO to exit. A message of “Command Cancelled!” show ups. Wait a few seconds or press any key to return to Diagnostic Menu.

3)   Press ENTER button to confirm.
If the codes are cleared successfully, an “ Erase Done!” confirmation message shows on the display.

If the codes are not cleared, then an “ Erase Failure. Turn Key on with Engine off!” message appears.  

4)   Press any button to return to Diagnostic Menu.

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