MCM Diagnostics: Description and Operation

MCM (Motor Control Module)
The MCM controls the amount of assist that the motor produces and the amount of regenerative power that the motor absorbs based on input from the ECM and the BCM. The MCM convents 144 V DC power into three-phase AC power required during assist, and converts AC power into DC power during regeneration.

The MCM also communicates with the PGM tester via the 16P data link connector for better serviceability. If any sensors or circuits in the IMA system are abnormal, the MCM turns on the IMA system indicator to warn the driver that there is a problem.