DTC P0A78-121: Drive Motor "A" Inverter Performance: Description

For a description of the inverter, Refer to DESCRIPTION .

If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU (HV CPU).

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0A78	121	Motor inverter overvoltage signal detection (overvoltage due to system malfunction)	Hybrid battery junction block assembly Inverter with converter assembly Service plug grip (EV battery fuse) Frame wire Hybrid vehicle transaxle assembly Generator cable Motor cable Power management control ECU PCU fuse Wire harness or connector