Key On Engine Off (KOEO) On-Demand Self Test

KEY ON ENGINE OFF (KOEO) ON-DEMAND SELF TEST

NOTE: It is necessary to wait 4 seconds after key on to initiate the KOEO self test. Failure to do so will result in a "test fail PCM" message to be displayed.

Connect the scan tool. Turn off accessories. If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests.
- Perform the necessary vehicle preparation and visual inspection. Refer to Quick Test Operation. Quick Test Operation
- Refer to the manufacturer manual for scan tool instructions.

NOTE: The following steps must be performed for the powertrain and transmission control modules.

- Select KOEO ON DEMAND SELF TEST.
- Turn key on.
- Wait 4 seconds for PCM and FICM to initialize completely.
- Follow operating instructions from the menu.
- Record DTCs and follow appropriate pinpoint test.
- After test, cycle key to off before running other tests or driving vehicle.

If performing repeated self tests, it may be necessary to unplug the GPCM to keep battery from going dead. Ignore any glow plug codes while the GPCM is unplugged.