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

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

R1-R2:

R3:

Normal Operation
The powertrain control module (PCM) monitors and controls the powertrain functions. When the PCM detects a concern, the PCM provides a signal over the communication network to the instrument cluster. The instrument cluster then turns on the MIL.

Possible Causes
- PCM
- instrument cluster