DTC P0A78-266: Drive Motor "A" Inverter Performance; DTC P0A78-267: Drive Motor "A" Inverter Performance: Description
The inverter contains a three-phase bridge circuit, which consists of six power transistors (IGBTs) each for MG2. The inverter converts high-voltage direct current from the EV battery into three-phase alternating current for MG2, it also converts three-phase alternating current supplied by MG2 into direct current for the EV battery. The MG ECU controls the actuation of the power transistors (IGBTs). The inverter transmits information necessary for control, such as amperage and voltage, to the MG ECU.
The MG ECU uses an inverter voltage sensor, which is built into the inverter, to detect high voltage.
The MG ECU monitors the inverter voltage sensor and detects the following malfunctions.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 266 | Short to GND in the inverter voltage (VH) signal line | Inverter with converter assembly |
| P0A78 | 267 | Open or short to +B in the inverter voltage (VH) signal line |