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

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

O1-O2:

O3-O4:

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

Possible Causes
- PCM
- instrument cluster