Key ON Engine OFF (KOEO) Self-Test

Key On Engine Off (KOEO) Self-Test

New Generation STAR Tester
- Perform the necessary vehicle preparation and visual inspection.
- Select VEHICLE & ENGINE SELECTION.
- Select SELECT NEW VEHICLE YEAR & MODEL.
- Select year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 State, California).
- Select DIAGNOSTIC DATA LINK.
- Press CANCEL to bypass link test if no communication errors are expected.
- Select PCM - POWERTRAIN CONTROL MODULE.
- Select DIAGNOSTIC TEST MODES.
- Select READ/CLEAR DIAGNOSTIC TEST RESULTS.
- Turn key ON.
- Press TRIGGER.
- Press START to retrieve diagnostic trouble codes.
- Press CANCEL to quit.