KOEO On-Demand Self-Test

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: It is necessary to wait 4 seconds after key on to initiate the KOEO self-test. Failure to do so results in a test fail powertrain control module (PCM) message to be displayed.

Connect the diagnostic tool. Turn off all accessories. If the vehicle is equipped with a power take-off (PTO) system or auxiliary idle control, it must be turned off to carry out the self-tests.

Carry out the necessary vehicle preparation and visual inspection. Refer to QUICK TEST OPERATION.
Refer to the manufacturer's manual for diagnostic tool instructions.

NOTE: The following steps must be carried out for the PCM and the transmission control module (TCM).

Key on, engine off.
Select KOEO on-demand self-test.
Wait 4 seconds for the PCM and the fuel injection control module (FICM) to initialize completely.
Follow the operating instructions from the menu.
Record the diagnostic trouble codes (DTCs) and follow the appropriate pinpoint test.
After the test, cycle the key to the OFF position before running other tests or driving the vehicle.

If carrying out repeated self-tests, it may be necessary to unplug the glow plug control module (GPCM) to maintain battery voltage. Ignore any glow plug codes while the GPCM is unplugged.