On-Board Diagnostic With Scan Tool

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, 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 or equivalent, refer to the scan tool tester article and the Introduction - Gasoline Engines article.

These Self Tests should be used to diagnose the PCM and should be carried out in order.

Self Test - Key ON Engine OFF (KOEO)
Self Test - Continuous Memory Codes
Self Test - Key ON Engine Running (KOER)
Special Test Modes
- Wiggle Test Mode
- Output Test Mode
PCM Reset Mode
Clearing DTCs P1000
On-Board Diagnostic (OBD) II Drive Cycle
Other scan tool features