DTC P0A93-346: Inverter Cooling System Performance: Description
The inverter converts the high-voltage direct current of the HV battery into the alternating current for MG2, MG1, and MGR. The inverter generates heat during the conversion process. Therefore, the inverter is cooled by a special cooling system consisting of an electric water pump, the cooling fan, and a radiator. This cooling system is independent of the engine cooling system. The hybrid vehicle control ECU monitors the electric water pump, cooling fan, and cooling system, and detects the following malfunction.
Fig 1: Identifying Radiator Assembly, Inverter Converter Assembly, Inverter Reserve Tank Assembly, Inverter Water Pump Assembly
TEXT IN ILLUSTRATION
| *1 | Radiator Assembly (HV) | *2 | Inverter with Converter Assembly |
| *3 | Inverter Reserve Tank Assembly | *4 | Inverter Water Pump Assembly (w/ Motor) |
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A93 | 346 | Inverter cooling system malfunction (HV cooling malfunction) |
|