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

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

Normal Operation
The MIL is controlled by the instrument cluster (IC) using data sent from the PCM over the high speed controller area network (HS-CAN) communication bus. If the MIL status message is missing for less than 5 seconds, the MIL remains in the last indication mode (on or off). If the MIL status message is missing for more than 5 seconds, the instrument cluster (IC) sets DTC U0100 in continuous memory and defaults the MIL on.

This pinpoint test is intended to diagnose the following:
- PCM
- Instrument cluster (IC)

Q1-Q3:

Q3-Q5: