Test O: The Malfunction Indicator Lamp (MIL) Is Never/Always On

PINPOINT TEST O: THE MALFUNCTION INDICATOR LAMP (MIL) IS NEVER/ALWAYS ON

O1-O4:

Normal Operation
The MIL is controlled by the instrument cluster using data sent from the powertrain control module (PCM) over the controller area network (CAN).

Possible Causes
- PCM
- Instrument cluster