Key On Engine Off (KOEO) Self Test

DESCRIPTION
Key On Engine Off (KOEO) Self-Test is a functional test of the powertrain control system performed on demand with the key ON and engine OFF. A fault has to be present at the time of testing for the KOEO Self-Test to detect the fault. When a fault is detected, a Diagnostic Trouble Code (DTC) will be output on the data link when requested by a scan tool.

PROCEDURE
- Perform the necessary vehicle preparation and visual inspection.
- Select VEHICLE & ENGINE SELECTION.
- Select NEW VEHICLE YEAR & MODEL.
- Select year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 States, California).
- Select DIAGNOSTIC DATA LINK.
- Select PCM - POWERTRAIN CTRL MODULE.
- Select DIAGNOSTIC TEST MODE.
- Select KOEO ON-DEMAND SELF-TEST
- Turn key ON.
- Press START and TRIGGER.
- Press CANCEL to quit.