On-Board Diagnostic (OBD) With Scan Tool

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. 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 manual 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 Diagnostic Tool Features

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

PID Access Mode
Freeze Frame Data Access Mode
Oxygen Sensor Monitor Mode