Monitor Description

P0A78 (INF 505):

If excessive amperage flows through the motor inverter due to an internal short, the motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

P0A78 (INF 806):

The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold level for a specified period of time, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.