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

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

KOEO On-Demand Self Test

Connect the NGS Tester to the DLC under the dash. 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. Scan Tool Testing and Procedures
^ Select VEHICLE & ENGINE SELECTION menu.
^ SELECT CORRECT VEHICLE, YEAR and MODEL.
^ Select PCM - POWERTRAIN CONTROL MODULE.
^ Select DIAGNOSTIC TEST MODE.
^ Select key On Engine Off (KOEO) ON DEMAND SELF TEST.
^ Turn key on.
^ 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 glow plug relay to keep battery from going dead. Ignore any glow plug codes while glow plug relay is unplugged.