Test M: The Malfunction Indicator Lamp (MIL) Is Never On

PINPOINT TEST M: THE MALFUNCTION INDICATOR LAMP (MIL) IS NEVER ON

M1-M3:

Normal Operation
The malfunction indicator lamp (MIL) is illuminated when a diagnostic trouble code (DTC) is detected by the powertrain control module (PCM). The instrument cluster receives the MIL data from the PCM over the communication network.

Possible Causes
- PCM
- instrument cluster