Key On Engine Running (KOER) On-Demand Self Test

KEY ON ENGINE RUNNING (KOER) ON-DEMAND SELF TEST

Connect the scan tool. Turn off accessories. Turn A/C off. If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests.

NOTE: Engine may run rough during this test.

- 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 KOER ON DEMAND SELF TEST.
- 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.