On-Board Diagnostic (OBD) with Scan Tool

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For detailed instruction and other diagnostic methods using the scan tool, refer to the tester and the Introduction - Gasoline Engines article.

These quick tests should be used to diagnose the Transmission Control Module (TCM) and should be carried out in order.

Self Test -Key ON Engine OFF (KOEO)
Self Test -Key ON Engine Running (KOER)
Special Test Mode, based on the system selected
Clearing DTCs
On-Board Diagnostic (OBD) II Drive Cycle
Other Scan Tool Features

For further information on other diagnostic testing features using the scan tool, refer to the Introduction - Gasoline Engines article.