DTC P0A3C (39): Motor Control Module (MCM) Overheating: General Description

The motor control processor obtains the voltage change value of the motor power inverter (MPI) module internal temperature from the motor control sub-processor through serial communication, and the processor uses this value to protect and control temperature rise in the MPI module. The motor control module (MCM) internal temperature is also estimated using the MPI module internal temperature. When the temperature rises, the cooling system a fan or the motor torque is controlled to cool the MPI module and to restrain the temperature rise of the MPI module and the MCM.

When the motor control processor temperature is indicated at a set temperature or more for a specified time, overheating of the MCM is detected and a DTC is stored.