Key ON Engine OFF (KOEO) Self-Test

NOTE: This procedure is written assuming the use of a New Generation STAR (NGS) Tester. If a generic OBD II scan tool is used, it will be necessary to follow the instructions supplied by the manufacturer of the scan tool.

- 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 the TRIGGER.

- Press START to retrieve diagnostic trouble codes.

- Press CANCEL to quit.