4. Carry Out The Key On Engine Off (KOEO) On-Demand Self-Test
4. CARRY OUT THE KEY ON ENGINE OFF (KOEO) ON-DEMAND SELF-TESTPurpose:
The purpose of this test is to determine if the powertrain control module (PCM) has detected concerns that would cause a performance concern.
Carry Out The KOEO On-Demand Self-Test
- Use the scan tool. Diagnostic trouble code (DTCs) set during this test are current faults.
Recommended Procedure:
Connect the scan 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-test.
- Carry out the necessary vehicle preparation and a visual inspection. Refer to Diagnostic Methods, Quick Test Operation. Quick Test Description
- Refer to the scan tool operating manual for instructions.
- Ignition ON, engine OFF.
- Follow the operating instructions from the diagnostic menu.
- Carry out a KOEO on-demand self-test.
- Record the DTCs, freeze frame information, and refer to the appropriate pinpoint test to continue diagnosis.
Tools Required:
Scan tool