Failure Mode Effects Management (FMEM)

PURPOSE
Failure Mode Effects Management (FMEM) is an alternate system strategy in the PCM designed to maintain vehicle operation if one or more sensor inputs fail.

OPERATION
When a sensor input is perceived to be out-of-limits by the Powertrain Control Module (PCM), an alternative strategy is initiated. The PCM substitutes a fixed value and continues to monitor the incorrect sensor input. If the suspect sensor operates within limits, the PCM returns to the normal engine running strategy.

All FMEM sensors display a sequence error message on the scan tool. The message may or may not be followed by Key-ON Engine-OFF or Continuous Memory DTCs when attempting Key-ON Engine-Running Self-Test Mode.